Initial Commit

environment/Lib/site-packages/twisted/trial/test/__init__.py

@@ -0,0 +1,42 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Unit tests for the Trial unit-testing framework.
+"""
+
+from hypothesis import HealthCheck, settings
+
+
+def _activateHypothesisProfile():
+    """
+    Load a Hypothesis profile appropriate for a Twisted test suite.
+    """
+    deterministic = settings(
+        # Disable the deadline.  It is too hard to guarantee that a particular
+        # piece of Python code will always run in less than some fixed amount
+        # of time.  Hardware capabilities, the OS scheduler, the Python
+        # garbage collector, and other factors all combine to make substantial
+        # outliers possible.  Such failures are a distraction from development
+        # and a hassle on continuous integration environments.
+        deadline=None,
+        suppress_health_check=[
+            # With the same reasoning as above, disable the Hypothesis time
+            # limit on data generation by example search strategies.
+            HealthCheck.too_slow,
+        ],
+        # When a developer is working on one set of changes, or continuous
+        # integration system is testing them, it is disruptive for Hypothesis
+        # to discover a bug in pre-existing code.  This is just what
+        # Hypothesis will do by default, by exploring a pseudo-randomly
+        # different set of examples each time.  Such failures are a
+        # distraction from development and a hassle in continuous integration
+        # environments.
+        derandomize=True,
+    )
+
+    settings.register_profile("twisted_trial_test_profile_deterministic", deterministic)
+    settings.load_profile("twisted_trial_test_profile_deterministic")
+
+
+_activateHypothesisProfile()

environment/Lib/site-packages/twisted/trial/test/detests.py

@@ -0,0 +1,232 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Tests for Deferred handling by L{twisted.trial.unittest.TestCase}.
+"""
+
+
+from twisted.internet import defer, reactor, threads
+from twisted.python.util import runWithWarningsSuppressed
+from twisted.trial import unittest
+from twisted.trial.util import suppress as SUPPRESS
+
+
+class DeferredSetUpOK(unittest.TestCase):
+    def setUp(self):
+        d = defer.succeed("value")
+        d.addCallback(self._cb_setUpCalled)
+        return d
+
+    def _cb_setUpCalled(self, ignored):
+        self._setUpCalled = True
+
+    def test_ok(self):
+        self.assertTrue(self._setUpCalled)
+
+
+class DeferredSetUpFail(unittest.TestCase):
+    testCalled = False
+
+    def setUp(self):
+        return defer.fail(unittest.FailTest("i fail"))
+
+    def test_ok(self):
+        DeferredSetUpFail.testCalled = True
+        self.fail("I should not get called")
+
+
+class DeferredSetUpCallbackFail(unittest.TestCase):
+    testCalled = False
+
+    def setUp(self):
+        d = defer.succeed("value")
+        d.addCallback(self._cb_setUpCalled)
+        return d
+
+    def _cb_setUpCalled(self, ignored):
+        self.fail("deliberate failure")
+
+    def test_ok(self):
+        DeferredSetUpCallbackFail.testCalled = True
+
+
+class DeferredSetUpError(unittest.TestCase):
+    testCalled = False
+
+    def setUp(self):
+        return defer.fail(RuntimeError("deliberate error"))
+
+    def test_ok(self):
+        DeferredSetUpError.testCalled = True
+
+
+class DeferredSetUpNeverFire(unittest.TestCase):
+    testCalled = False
+
+    def setUp(self):
+        return defer.Deferred()
+
+    def test_ok(self):
+        DeferredSetUpNeverFire.testCalled = True
+
+
+class DeferredSetUpSkip(unittest.TestCase):
+    testCalled = False
+
+    def setUp(self):
+        d = defer.succeed("value")
+        d.addCallback(self._cb1)
+        return d
+
+    def _cb1(self, ignored):
+        raise unittest.SkipTest("skip me")
+
+    def test_ok(self):
+        DeferredSetUpSkip.testCalled = True
+
+
+class DeferredTests(unittest.TestCase):
+    touched = False
+
+    def _cb_fail(self, reason):
+        self.fail(reason)
+
+    def _cb_error(self, reason):
+        raise RuntimeError(reason)
+
+    def _cb_skip(self, reason):
+        raise unittest.SkipTest(reason)
+
+    def _touchClass(self, ignored):
+        self.__class__.touched = True
+
+    def setUp(self):
+        self.__class__.touched = False
+
+    def test_pass(self):
+        return defer.succeed("success")
+
+    def test_passGenerated(self):
+        self._touchClass(None)
+        yield None
+
+    test_passGenerated = runWithWarningsSuppressed(
+        [
+            SUPPRESS(
+                message="twisted.internet.defer.deferredGenerator was " "deprecated"
+            )
+        ],
+        defer.deferredGenerator,
+        test_passGenerated,
+    )
+
+    @defer.inlineCallbacks
+    def test_passInlineCallbacks(self):
+        """
+        Test case that is decorated with L{defer.inlineCallbacks}.
+        """
+        self._touchClass(None)
+        yield None
+
+    def test_fail(self):
+        return defer.fail(self.failureException("I fail"))
+
+    def test_failureInCallback(self):
+        d = defer.succeed("fail")
+        d.addCallback(self._cb_fail)
+        return d
+
+    def test_errorInCallback(self):
+        d = defer.succeed("error")
+        d.addCallback(self._cb_error)
+        return d
+
+    def test_skip(self):
+        d = defer.succeed("skip")
+        d.addCallback(self._cb_skip)
+        d.addCallback(self._touchClass)
+        return d
+
+    def test_thread(self):
+        return threads.deferToThread(lambda: None)
+
+    def test_expectedFailure(self):
+        d = defer.succeed("todo")
+        d.addCallback(self._cb_error)
+        return d
+
+    test_expectedFailure.todo = "Expected failure"  # type: ignore[attr-defined]
+
+
+class TimeoutTests(unittest.TestCase):
+    timedOut = None
+
+    def test_pass(self):
+        d = defer.Deferred()
+        reactor.callLater(0, d.callback, "hoorj!")
+        return d
+
+    test_pass.timeout = 2  # type: ignore[attr-defined]
+
+    def test_passDefault(self):
+        # test default timeout
+        d = defer.Deferred()
+        reactor.callLater(0, d.callback, "hoorj!")
+        return d
+
+    def test_timeout(self):
+        return defer.Deferred()
+
+    test_timeout.timeout = 0.1  # type: ignore[attr-defined]
+
+    def test_timeoutZero(self):
+        return defer.Deferred()
+
+    test_timeoutZero.timeout = 0  # type: ignore[attr-defined]
+
+    def test_expectedFailure(self):
+        return defer.Deferred()
+
+    test_expectedFailure.timeout = 0.1  # type: ignore[attr-defined]
+    test_expectedFailure.todo = "i will get it right, eventually"  # type: ignore[attr-defined]
+
+    def test_skip(self):
+        return defer.Deferred()
+
+    test_skip.timeout = 0.1  # type: ignore[attr-defined]
+    test_skip.skip = "i will get it right, eventually"  # type: ignore[attr-defined]
+
+    def test_errorPropagation(self):
+        def timedOut(err):
+            self.__class__.timedOut = err
+            return err
+
+        d = defer.Deferred()
+        d.addErrback(timedOut)
+        return d
+
+    test_errorPropagation.timeout = 0.1  # type: ignore[attr-defined]
+
+    def test_calledButNeverCallback(self):
+        d = defer.Deferred()
+
+        def neverFire(r):
+            return defer.Deferred()
+
+        d.addCallback(neverFire)
+        d.callback(1)
+        return d
+
+    test_calledButNeverCallback.timeout = 0.1  # type: ignore[attr-defined]
+
+
+class TestClassTimeoutAttribute(unittest.TestCase):
+    timeout = 0.2
+
+    def setUp(self):
+        self.d = defer.Deferred()
+
+    def testMethod(self):
+        self.methodCalled = True
+        return self.d

environment/Lib/site-packages/twisted/trial/test/erroneous.py

@@ -0,0 +1,261 @@
+# -*- test-case-name: twisted.trial.test.test_tests -*-
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Definitions of test cases with various interesting error-related behaviors, to
+be used by test modules to exercise different features of trial's test runner.
+
+See the L{twisted.trial.test.test_tests} module docstring for details about how
+this code is arranged.
+
+Some of these tests are also used by L{twisted.trial._dist.test}.
+"""
+
+
+from unittest import skipIf
+
+from twisted.internet import defer, protocol, reactor
+from twisted.internet.task import deferLater
+from twisted.trial import unittest, util
+
+
+class FoolishError(Exception):
+    pass
+
+
+class LargeError(Exception):
+    """
+    An exception which has a string representation of at least a specified
+    number of characters.
+    """
+
+    def __init__(self, minSize: int) -> None:
+        Exception.__init__(self)
+        self.minSize = minSize
+
+    def __str__(self):
+        large = "x" * self.minSize
+        return f"LargeError<I fail: {large}>"
+
+
+class FailureInSetUpMixin:
+    def setUp(self):
+        raise FoolishError("I am a broken setUp method")
+
+    def test_noop(self):
+        pass
+
+
+class SynchronousTestFailureInSetUp(FailureInSetUpMixin, unittest.SynchronousTestCase):
+    pass
+
+
+class AsynchronousTestFailureInSetUp(FailureInSetUpMixin, unittest.TestCase):
+    pass
+
+
+class FailureInTearDownMixin:
+    def tearDown(self):
+        raise FoolishError("I am a broken tearDown method")
+
+    def test_noop(self):
+        pass
+
+
+class SynchronousTestFailureInTearDown(
+    FailureInTearDownMixin, unittest.SynchronousTestCase
+):
+    pass
+
+
+class AsynchronousTestFailureInTearDown(FailureInTearDownMixin, unittest.TestCase):
+    pass
+
+
+class FailureButTearDownRunsMixin:
+    """
+    A test fails, but its L{tearDown} still runs.
+    """
+
+    tornDown = False
+
+    def tearDown(self):
+        self.tornDown = True
+
+    def test_fails(self):
+        """
+        A test that fails.
+        """
+        raise FoolishError("I am a broken test")
+
+
+class SynchronousTestFailureButTearDownRuns(
+    FailureButTearDownRunsMixin, unittest.SynchronousTestCase
+):
+    pass
+
+
+class AsynchronousTestFailureButTearDownRuns(
+    FailureButTearDownRunsMixin, unittest.TestCase
+):
+    pass
+
+
+class TestRegularFail(unittest.SynchronousTestCase):
+    def test_fail(self):
+        self.fail("I fail")
+
+    def test_subfail(self):
+        self.subroutine()
+
+    def subroutine(self):
+        self.fail("I fail inside")
+
+
+class TestAsynchronousFail(unittest.TestCase):
+    """
+    Test failures for L{unittest.TestCase} based classes.
+    """
+
+    text = "I fail"
+
+    def test_fail(self) -> defer.Deferred[None]:
+        """
+        A test which fails in the callback of the returned L{defer.Deferred}.
+        """
+        return deferLater(reactor, 0, self.fail, "I fail later")  # type: ignore[arg-type]
+
+    def test_failGreaterThan64k(self) -> defer.Deferred[None]:
+        """
+        A test which fails in the callback of the returned L{defer.Deferred}
+        with a very long string.
+        """
+        return deferLater(reactor, 0, self.fail, "I fail later: " + "x" * 2 ** 16)  # type: ignore[arg-type]
+
+    def test_exception(self) -> None:
+        """
+        A test which raises an exception synchronously.
+        """
+        raise Exception(self.text)
+
+    def test_exceptionGreaterThan64k(self) -> None:
+        """
+        A test which raises an exception with a long string representation
+        synchronously.
+        """
+        raise LargeError(2 ** 16)
+
+    def test_exceptionGreaterThan64kEncoded(self) -> None:
+        """
+        A test which synchronously raises an exception with a long string
+        representation including non-ascii content.
+        """
+        # The exception text itself is not greater than 64k but SNOWMAN
+        # encodes to 3 bytes with UTF-8 so the length of the UTF-8 encoding of
+        # the string representation of this exception will be greater than 2
+        # ** 16.
+        raise Exception("\N{SNOWMAN}" * 2 ** 15)
+
+
+class ErrorTest(unittest.SynchronousTestCase):
+    """
+    A test case which has a L{test_foo} which will raise an error.
+
+    @ivar ran: boolean indicating whether L{test_foo} has been run.
+    """
+
+    ran = False
+
+    def test_foo(self):
+        """
+        Set C{self.ran} to True and raise a C{ZeroDivisionError}
+        """
+        self.ran = True
+        1 / 0
+
+
+@skipIf(True, "skipping this test")
+class TestSkipTestCase(unittest.SynchronousTestCase):
+    pass
+
+
+class DelayedCall(unittest.TestCase):
+    hiddenExceptionMsg = "something blew up"
+
+    def go(self):
+        raise RuntimeError(self.hiddenExceptionMsg)
+
+    def testHiddenException(self):
+        """
+        What happens if an error is raised in a DelayedCall and an error is
+        also raised in the test?
+
+        L{test_reporter.ErrorReportingTests.testHiddenException} checks that
+        both errors get reported.
+
+        Note that this behaviour is deprecated. A B{real} test would return a
+        Deferred that got triggered by the callLater. This would guarantee the
+        delayed call error gets reported.
+        """
+        reactor.callLater(0, self.go)
+        reactor.iterate(0.01)
+        self.fail("Deliberate failure to mask the hidden exception")
+
+    testHiddenException.suppress = [  # type: ignore[attr-defined]
+        util.suppress(
+            message=r"reactor\.iterate cannot be used.*", category=DeprecationWarning
+        )
+    ]
+
+
+class ReactorCleanupTests(unittest.TestCase):
+    def test_leftoverPendingCalls(self):
+        def _():
+            print("foo!")
+
+        reactor.callLater(10000.0, _)
+
+
+class SocketOpenTest(unittest.TestCase):
+    def test_socketsLeftOpen(self):
+        f = protocol.Factory()
+        f.protocol = protocol.Protocol
+        reactor.listenTCP(0, f)
+
+
+class TimingOutDeferred(unittest.TestCase):
+    def test_alpha(self):
+        pass
+
+    def test_deferredThatNeverFires(self):
+        self.methodCalled = True
+        d = defer.Deferred()
+        return d
+
+    def test_omega(self):
+        pass
+
+
+def unexpectedException(self):
+    """i will raise an unexpected exception...
+    ... *CAUSE THAT'S THE KINDA GUY I AM*
+
+    >>> 1/0
+    """
+
+
+class EventuallyFailingTestCase(unittest.SynchronousTestCase):
+    """
+    A test suite that fails after it is run a few times.
+    """
+
+    n: int = 0
+
+    def test_it(self):
+        """
+        Run successfully a few times and then fail forever after.
+        """
+        self.n += 1
+        if self.n >= 5:
+            self.fail("eventually failing")

environment/Lib/site-packages/twisted/trial/test/matchers.py

@@ -0,0 +1,95 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Hamcrest matchers useful throughout the test suite.
+"""
+
+from typing import IO, Callable, Optional, TypeVar
+
+from hamcrest.core.base_matcher import BaseMatcher
+from hamcrest.core.description import Description
+from hamcrest.core.matcher import Matcher
+
+from twisted.python.filepath import IFilePath
+from twisted.python.reflect import fullyQualifiedName
+
+_A = TypeVar("_A")
+_B = TypeVar("_B")
+
+
+class _MatchAfter(BaseMatcher[_A]):
+    """
+    The implementation of L{after}.
+
+    @ivar f: The function to apply.
+    @ivar m: The matcher to use on the result.
+
+    @ivar _e: After trying to apply the function fails with an exception, the
+        exception that was raised.  This can later be used by
+        L{describe_mismatch}.
+    """
+
+    def __init__(self, f: Callable[[_A], _B], m: Matcher[_B]):
+        self.f = f
+        self.m = m
+        self._e: Optional[Exception] = None
+
+    def _matches(self, item: _A) -> bool:
+        """
+        Apply the function and delegate matching on the result.
+        """
+        try:
+            transformed = self.f(item)
+        except Exception as e:
+            self._e = e
+            return False
+        else:
+            return self.m.matches(transformed)
+
+    def describe_mismatch(self, item: _A, mismatch_description: Description) -> None:
+        """
+        Describe the mismatching item or the exception that occurred while
+        pre-processing it.
+
+        @note: Since the exception reporting here depends on mutable state it
+            will only work as long as PyHamcrest calls methods in the right
+            order.  The PyHamcrest Matcher interface doesn't seem to allow
+            implementing this functionality in a more reliable way (see the
+            implementation of L{assert_that}).
+        """
+        if self._e is None:
+            super().describe_mismatch(item, mismatch_description)
+        else:
+            mismatch_description.append_text(
+                f"{fullyQualifiedName(self.f)}({item!r}) raised\n"
+                f"{fullyQualifiedName(self._e.__class__)}: {self._e}"
+            )
+
+    def describe_to(self, description: Description) -> None:
+        """
+        Create a text description of the match requirement.
+        """
+        description.append_text(f"[after {self.f}] ")
+        self.m.describe_to(description)
+
+
+def after(f: Callable[[_A], _B], m: Matcher[_B]) -> Matcher[_A]:
+    """
+    Create a matcher which calls C{f} and uses C{m} to match the result.
+    """
+    return _MatchAfter(f, m)
+
+
+def fileContents(m: Matcher[str], encoding: str = "utf-8") -> Matcher[IFilePath]:
+    """
+    Create a matcher which matches a L{FilePath} the contents of which are
+    matched by L{m}.
+    """
+
+    def getContent(p: IFilePath) -> str:
+        f: IO[bytes]
+        with p.open() as f:
+            return f.read().decode(encoding)
+
+    return after(getContent, m)

environment/Lib/site-packages/twisted/trial/test/mockcustomsuite.py

@@ -0,0 +1,22 @@
+# Copyright (c) 2006 Twisted Matrix Laboratories. See LICENSE for details
+
+"""
+Mock test module that contains a C{test_suite} method. L{runner.TestLoader}
+should load the tests from the C{test_suite}, not from the C{Foo} C{TestCase}.
+
+See {twisted.trial.test.test_loader.LoaderTest.test_loadModuleWith_test_suite}.
+"""
+
+
+from twisted.trial import runner, unittest
+
+
+class Foo(unittest.SynchronousTestCase):
+    def test_foo(self):
+        pass
+
+
+def test_suite():
+    ts = runner.TestSuite()
+    ts.name = "MyCustomSuite"
+    return ts

environment/Lib/site-packages/twisted/trial/test/mockcustomsuite2.py

@@ -0,0 +1,22 @@
+# Copyright (c) 2006 Twisted Matrix Laboratories. See LICENSE for details
+
+"""
+Mock test module that contains a C{testSuite} method. L{runner.TestLoader}
+should load the tests from the C{testSuite}, not from the C{Foo} C{TestCase}.
+
+See L{twisted.trial.test.test_loader.LoaderTest.test_loadModuleWith_testSuite}.
+"""
+
+
+from twisted.trial import runner, unittest
+
+
+class Foo(unittest.SynchronousTestCase):
+    def test_foo(self):
+        pass
+
+
+def testSuite():
+    ts = runner.TestSuite()
+    ts.name = "MyCustomSuite"
+    return ts

environment/Lib/site-packages/twisted/trial/test/mockcustomsuite3.py

@@ -0,0 +1,29 @@
+# Copyright (c) 2006 Twisted Matrix Laboratories. See LICENSE for details
+
+"""
+Mock test module that contains both a C{test_suite} and a C{testSuite} method.
+L{runner.TestLoader} should load the tests from the C{testSuite}, not from the
+C{Foo} C{TestCase} nor from the C{test_suite} method.
+
+See {twisted.trial.test.test_loader.LoaderTest.test_loadModuleWithBothCustom}.
+"""
+
+
+from twisted.trial import runner, unittest
+
+
+class Foo(unittest.SynchronousTestCase):
+    def test_foo(self):
+        pass
+
+
+def test_suite():
+    ts = runner.TestSuite()
+    ts.name = "test_suite"
+    return ts
+
+
+def testSuite():
+    ts = runner.TestSuite()
+    ts.name = "testSuite"
+    return ts

environment/Lib/site-packages/twisted/trial/test/mockdoctest.py

@@ -0,0 +1,103 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+# this module is a trivial class with doctests to test trial's doctest
+# support.
+
+
+class Counter:
+    """a simple counter object for testing trial's doctest support
+
+    >>> c = Counter()
+    >>> c.value()
+    0
+    >>> c += 3
+    >>> c.value()
+    3
+    >>> c.incr()
+    >>> c.value() == 4
+    True
+    >>> c == 4
+    True
+    >>> c != 9
+    True
+
+    """
+
+    _count = 0
+
+    def __init__(self, initialValue=0, maxval=None):
+        self._count = initialValue
+        self.maxval = maxval
+
+    def __iadd__(self, other):
+        """add other to my value and return self
+
+        >>> c = Counter(100)
+        >>> c += 333
+        >>> c == 433
+        True
+        """
+        if self.maxval is not None and ((self._count + other) > self.maxval):
+            raise ValueError("sorry, counter got too big")
+        else:
+            self._count += other
+        return self
+
+    def __eq__(self, other: object) -> bool:
+        """equality operator, compare other to my value()
+
+        >>> c = Counter()
+        >>> c == 0
+        True
+        >>> c += 10
+        >>> c.incr()
+        >>> c == 10   # fail this test on purpose
+        True
+
+        """
+        return self._count == other
+
+    def __ne__(self, other: object) -> bool:
+        """inequality operator
+
+        >>> c = Counter()
+        >>> c != 10
+        True
+        """
+        return not self.__eq__(other)
+
+    def incr(self):
+        """increment my value by 1
+
+        >>> from twisted.trial.test.mockdoctest import Counter
+        >>> c = Counter(10, 11)
+        >>> c.incr()
+        >>> c.value() == 11
+        True
+        >>> c.incr()
+        Traceback (most recent call last):
+          File "<stdin>", line 1, in ?
+          File "twisted/trial/test/mockdoctest.py", line 51, in incr
+            self.__iadd__(1)
+          File "twisted/trial/test/mockdoctest.py", line 39, in __iadd__
+            raise ValueError, "sorry, counter got too big"
+        ValueError: sorry, counter got too big
+        """
+        self.__iadd__(1)
+
+    def value(self):
+        """return this counter's value
+
+        >>> c = Counter(555)
+        >>> c.value() == 555
+        True
+        """
+        return self._count
+
+    def unexpectedException(self):
+        """i will raise an unexpected exception...
+        ... *CAUSE THAT'S THE KINDA GUY I AM*
+
+              >>> 1/0
+        """

environment/Lib/site-packages/twisted/trial/test/moduleself.py

@@ -0,0 +1,7 @@
+# -*- test-case-name: twisted.trial.test.moduleself -*-
+from twisted.trial import unittest
+
+
+class Foo(unittest.SynchronousTestCase):
+    def testFoo(self):
+        pass

environment/Lib/site-packages/twisted/trial/test/moduletest.py

@@ -0,0 +1,11 @@
+# -*- test-case-name: twisted.trial.test.test_log -*-
+
+# fodder for test_script, which parses files for emacs local variable
+# declarations.  This one is supposed to have:
+#    test-case-name: twisted.trial.test.test_log.
+# in the first line
+# The class declaration is irrelevant
+
+
+class Foo:
+    pass

environment/Lib/site-packages/twisted/trial/test/novars.py

@@ -0,0 +1,7 @@
+# fodder for test_script, which parses files for emacs local variable
+# declarations.  This one is supposed to have none.
+# The class declaration is irrelevant
+
+
+class Bar:
+    pass

environment/Lib/site-packages/twisted/trial/test/ordertests.py

@@ -0,0 +1,47 @@
+# -*- test-case-name: twisted.trial.test.test_script -*-
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Tests for handling of trial's --order option.
+"""
+
+from twisted.trial import unittest
+
+
+class FooTest(unittest.TestCase):
+    """
+    Used to make assertions about the order its tests will be run in.
+    """
+
+    def test_first(self):
+        pass
+
+    def test_second(self):
+        pass
+
+    def test_third(self):
+        pass
+
+    def test_fourth(self):
+        pass
+
+
+class BazTest(unittest.TestCase):
+    """
+    Used to make assertions about the order the test cases in this module are
+    run in.
+    """
+
+    def test_baz(self):
+        pass
+
+
+class BarTest(unittest.TestCase):
+    """
+    Used to make assertions about the order the test cases in this module are
+    run in.
+    """
+
+    def test_bar(self):
+        pass

environment/Lib/site-packages/twisted/trial/test/packages.py

@@ -0,0 +1,178 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+#
+
+"""
+Classes and functions used by L{twisted.trial.test.test_util}
+and L{twisted.trial.test.test_loader}.
+"""
+
+
+import os
+import sys
+
+# Python 3 has some funny import caching, which we don't want.
+# invalidate_caches clears it out for us.
+from importlib import invalidate_caches as invalidateImportCaches
+
+from twisted.trial import unittest
+
+testModule = """
+from twisted.trial import unittest
+
+class FooTest(unittest.SynchronousTestCase):
+    def testFoo(self):
+        pass
+"""
+
+dosModule = testModule.replace("\n", "\r\n")
+
+
+testSample = """
+'''This module is used by test_loader to test the Trial test loading
+functionality. Do NOT change the number of tests in this module.
+Do NOT change the names the tests in this module.
+'''
+
+import unittest as pyunit
+from twisted.trial import unittest
+
+class FooTest(unittest.SynchronousTestCase):
+    def test_foo(self):
+        pass
+
+    def test_bar(self):
+        pass
+
+
+class PyunitTest(pyunit.TestCase):
+    def test_foo(self):
+        pass
+
+    def test_bar(self):
+        pass
+
+
+class NotATest:
+    def test_foo(self):
+        pass
+
+
+class AlphabetTest(unittest.SynchronousTestCase):
+    def test_a(self):
+        pass
+
+    def test_b(self):
+        pass
+
+    def test_c(self):
+        pass
+"""
+
+testInheritanceSample = """
+'''This module is used by test_loader to test the Trial test loading
+functionality. Do NOT change the number of tests in this module.
+Do NOT change the names the tests in this module.
+'''
+
+from twisted.trial import unittest
+
+class X:
+
+    def test_foo(self):
+        pass
+
+class A(unittest.SynchronousTestCase, X):
+    pass
+
+class B(unittest.SynchronousTestCase, X):
+    pass
+
+"""
+
+
+class PackageTest(unittest.SynchronousTestCase):
+    files = [
+        ("badpackage/__init__.py", "frotz\n"),
+        ("badpackage/test_module.py", ""),
+        ("unimportablepackage/__init__.py", ""),
+        ("unimportablepackage/test_module.py", "import notarealmoduleok\n"),
+        ("package2/__init__.py", ""),
+        ("package2/test_module.py", "import frotz\n"),
+        ("package/__init__.py", ""),
+        ("package/frotz.py", "frotz\n"),
+        ("package/test_bad_module.py", 'raise ZeroDivisionError("fake error")'),
+        ("package/test_dos_module.py", dosModule),
+        ("package/test_import_module.py", "import frotz"),
+        ("package/test_module.py", testModule),
+        ("goodpackage/__init__.py", ""),
+        ("goodpackage/test_sample.py", testSample),
+        ("goodpackage/sub/__init__.py", ""),
+        ("goodpackage/sub/test_sample.py", testSample),
+        ("inheritancepackage/__init__.py", ""),
+        ("inheritancepackage/test_x.py", testInheritanceSample),
+    ]
+
+    def _toModuleName(self, filename):
+        name = os.path.splitext(filename)[0]
+        segs = name.split("/")
+        if segs[-1] == "__init__":
+            segs = segs[:-1]
+        return ".".join(segs)
+
+    def getModules(self):
+        """
+        Return matching module names for files listed in C{self.files}.
+        """
+        return [self._toModuleName(filename) for (filename, code) in self.files]
+
+    def cleanUpModules(self):
+        modules = self.getModules()
+        modules.sort()
+        modules.reverse()
+        for module in modules:
+            try:
+                del sys.modules[module]
+            except KeyError:
+                pass
+
+    def createFiles(self, files, parentDir="."):
+        for filename, contents in self.files:
+            filename = os.path.join(parentDir, filename)
+            self._createDirectory(filename)
+            with open(filename, "w") as fd:
+                fd.write(contents)
+
+    def _createDirectory(self, filename):
+        directory = os.path.dirname(filename)
+        if not os.path.exists(directory):
+            os.makedirs(directory)
+
+    def setUp(self, parentDir=None):
+        invalidateImportCaches()
+        if parentDir is None:
+            parentDir = self.mktemp()
+        self.parent = parentDir
+        self.createFiles(self.files, parentDir)
+
+    def tearDown(self):
+        self.cleanUpModules()
+
+
+class SysPathManglingTest(PackageTest):
+    def setUp(self, parent=None):
+        invalidateImportCaches()
+        self.oldPath = sys.path[:]
+        self.newPath = sys.path[:]
+        if parent is None:
+            parent = self.mktemp()
+        PackageTest.setUp(self, parent)
+        self.newPath.append(self.parent)
+        self.mangleSysPath(self.newPath)
+
+    def tearDown(self):
+        PackageTest.tearDown(self)
+        self.mangleSysPath(self.oldPath)
+
+    def mangleSysPath(self, pathVar):
+        sys.path[:] = pathVar

environment/Lib/site-packages/twisted/trial/test/pyunitcases.py

@@ -0,0 +1,115 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Sample test cases defined using the standard library L{unittest.TestCase}
+class which are used as data by test cases which are actually part of the
+trial test suite to verify handling of handling of such cases.
+"""
+
+import unittest
+from sys import exc_info
+
+from twisted.python.failure import Failure
+
+
+class PyUnitTest(unittest.TestCase):
+    def test_pass(self):
+        """
+        A passing test.
+        """
+
+    def test_error(self):
+        """
+        A test which raises an exception to cause an error.
+        """
+        raise Exception("pyunit error")
+
+    def test_fail(self):
+        """
+        A test which uses L{unittest.TestCase.fail} to cause a failure.
+        """
+        self.fail("pyunit failure")
+
+    @unittest.skip("pyunit skip")
+    def test_skip(self):
+        """
+        A test which uses the L{unittest.skip} decorator to cause a skip.
+        """
+
+
+class _NonStringId:
+    """
+    A class that looks a little like a TestCase, but not enough so to
+    actually be used as one.  This helps L{BrokenRunInfrastructure} use some
+    interfaces incorrectly to provoke certain failure conditions.
+    """
+
+    def id(self) -> object:
+        return object()
+
+
+class BrokenRunInfrastructure(unittest.TestCase):
+    """
+    A test suite that is broken at the level of integration between
+    L{TestCase.run} and the results object.
+    """
+
+    def run(self, result):
+        """
+        Override the normal C{run} behavior to pass the result object
+        along to the test method.  Each test method needs the result object so
+        that it can implement its particular kind of brokenness.
+        """
+        return getattr(self, self._testMethodName)(result)
+
+    def test_addSuccess(self, result):
+        """
+        Violate the L{TestResult.addSuccess} interface.
+        """
+
+        result.addSuccess(_NonStringId())
+
+    def test_addError(self, result):
+        """
+        Violate the L{TestResult.addError} interface.
+        """
+        try:
+            raise Exception("test_addError")
+        except BaseException:
+            err = exc_info()
+
+        result.addError(_NonStringId(), err)
+
+    def test_addFailure(self, result):
+        """
+        Violate the L{TestResult.addFailure} interface.
+        """
+        try:
+            raise Exception("test_addFailure")
+        except BaseException:
+            err = exc_info()
+
+        result.addFailure(_NonStringId(), err)
+
+    def test_addSkip(self, result):
+        """
+        Violate the L{TestResult.addSkip} interface.
+        """
+        result.addSkip(_NonStringId(), "test_addSkip")
+
+    def test_addExpectedFailure(self, result):
+        """
+        Violate the L{TestResult.addExpectedFailure} interface.
+        """
+        try:
+            raise Exception("test_addExpectedFailure")
+        except BaseException:
+            err = Failure()
+        result.addExpectedFailure(_NonStringId(), err)
+
+    def test_addUnexpectedSuccess(self, result):
+        """
+        Violate the L{TestResult.addUnexpectedSuccess} interface.
+        """
+        result.addUnexpectedSuccess(_NonStringId())

environment/Lib/site-packages/twisted/trial/test/sample.py

@@ -0,0 +1,95 @@
+"""This module is used by test_loader to test the Trial test loading
+functionality. Do NOT change the number of tests in this module.  Do NOT change
+the names the tests in this module.
+"""
+
+
+import unittest as pyunit
+
+from twisted.python.util import mergeFunctionMetadata
+from twisted.trial import unittest
+
+
+class FooTest(unittest.SynchronousTestCase):
+    def test_foo(self):
+        pass
+
+    def test_bar(self):
+        pass
+
+
+def badDecorator(fn):
+    """
+    Decorate a function without preserving the name of the original function.
+    Always return a function with the same name.
+    """
+
+    def nameCollision(*args, **kwargs):
+        return fn(*args, **kwargs)
+
+    return nameCollision
+
+
+def goodDecorator(fn):
+    """
+    Decorate a function and preserve the original name.
+    """
+
+    def nameCollision(*args, **kwargs):
+        return fn(*args, **kwargs)
+
+    return mergeFunctionMetadata(fn, nameCollision)
+
+
+class DecorationTest(unittest.SynchronousTestCase):
+    def test_badDecorator(self):
+        """
+        This test method is decorated in a way that gives it a confusing name
+        that collides with another method.
+        """
+
+    test_badDecorator = badDecorator(test_badDecorator)
+
+    def test_goodDecorator(self):
+        """
+        This test method is decorated in a way that preserves its name.
+        """
+
+    test_goodDecorator = goodDecorator(test_goodDecorator)
+
+    def renamedDecorator(self):
+        """
+        This is secretly a test method and will be decorated and then renamed so
+        test discovery can find it.
+        """
+
+    test_renamedDecorator = goodDecorator(renamedDecorator)
+
+    def nameCollision(self):
+        """
+        This isn't a test, it's just here to collide with tests.
+        """
+
+
+class PyunitTest(pyunit.TestCase):
+    def test_foo(self):
+        pass
+
+    def test_bar(self):
+        pass
+
+
+class NotATest:
+    def test_foo(self):
+        pass
+
+
+class AlphabetTest(unittest.SynchronousTestCase):
+    def test_a(self):
+        pass
+
+    def test_b(self):
+        pass
+
+    def test_c(self):
+        pass

environment/Lib/site-packages/twisted/trial/test/scripttest.py

@@ -0,0 +1,15 @@
+#!/usr/bin/env python
+# -*- test-case-name: twisted.trial.test.test_log,twisted.trial.test.test_runner -*-
+
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+# fodder for test_script, which parses files for emacs local variable
+# declarations.  This one is supposed to have:
+#    test-case-name: twisted.trial.test.test_log,twisted.trial.test.test_runner
+# in the second line
+# The class declaration is irrelevant
+
+
+class Foo:
+    pass

environment/Lib/site-packages/twisted/trial/test/skipping.py

@@ -0,0 +1,280 @@
+# -*- test-case-name: twisted.trial.test.test_tests -*-
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Definitions of test cases with various interesting behaviors, to be used by
+L{twisted.trial.test.test_tests} and other test modules to exercise different
+features of trial's test runner.
+
+See the L{twisted.trial.test.test_tests} module docstring for details about how
+this code is arranged.
+"""
+
+
+from twisted.trial.unittest import FailTest, SkipTest, SynchronousTestCase, TestCase
+
+
+class SkippingMixin:
+    def test_skip1(self):
+        raise SkipTest("skip1")
+
+    def test_skip2(self):
+        raise RuntimeError("I should not get raised")
+
+    test_skip2.skip = "skip2"  # type: ignore[attr-defined]
+
+    def test_skip3(self):
+        self.fail("I should not fail")
+
+    test_skip3.skip = "skip3"  # type: ignore[attr-defined]
+
+
+class SynchronousSkipping(SkippingMixin, SynchronousTestCase):
+    pass
+
+
+class AsynchronousSkipping(SkippingMixin, TestCase):
+    pass
+
+
+class SkippingSetUpMixin:
+    def setUp(self):
+        raise SkipTest("skipSetUp")
+
+    def test_1(self):
+        pass
+
+    def test_2(self):
+        pass
+
+
+class SynchronousSkippingSetUp(SkippingSetUpMixin, SynchronousTestCase):
+    pass
+
+
+class AsynchronousSkippingSetUp(SkippingSetUpMixin, TestCase):
+    pass
+
+
+class DeprecatedReasonlessSkipMixin:
+    def test_1(self):
+        raise SkipTest()
+
+
+class SynchronousDeprecatedReasonlessSkip(
+    DeprecatedReasonlessSkipMixin, SynchronousTestCase
+):
+    pass
+
+
+class AsynchronousDeprecatedReasonlessSkip(DeprecatedReasonlessSkipMixin, TestCase):
+    pass
+
+
+class SkippedClassMixin:
+    skip = "class"
+
+    def setUp(self):
+        self.__class__._setUpRan = True
+
+    def test_skip1(self):
+        raise SkipTest("skip1")
+
+    def test_skip2(self):
+        raise RuntimeError("Ought to skip me")
+
+    test_skip2.skip = "skip2"  # type: ignore
+
+    def test_skip3(self):
+        pass
+
+    def test_skip4(self):
+        raise RuntimeError("Skip me too")
+
+
+class SynchronousSkippedClass(SkippedClassMixin, SynchronousTestCase):
+    pass
+
+
+class AsynchronousSkippedClass(SkippedClassMixin, TestCase):
+    pass
+
+
+class TodoMixin:
+    def test_todo1(self):
+        self.fail("deliberate failure")
+
+    test_todo1.todo = "todo1"  # type: ignore[attr-defined]
+
+    def test_todo2(self):
+        raise RuntimeError("deliberate error")
+
+    test_todo2.todo = "todo2"  # type: ignore[attr-defined]
+
+    def test_todo3(self):
+        """unexpected success"""
+
+    test_todo3.todo = "todo3"  # type: ignore[attr-defined]
+
+
+class SynchronousTodo(TodoMixin, SynchronousTestCase):
+    pass
+
+
+class AsynchronousTodo(TodoMixin, TestCase):
+    pass
+
+
+class SetUpTodoMixin:
+    def setUp(self):
+        raise RuntimeError("deliberate error")
+
+    def test_todo1(self):
+        pass
+
+    test_todo1.todo = "setUp todo1"  # type: ignore[attr-defined]
+
+
+class SynchronousSetUpTodo(SetUpTodoMixin, SynchronousTestCase):
+    pass
+
+
+class AsynchronousSetUpTodo(SetUpTodoMixin, TestCase):
+    pass
+
+
+class TearDownTodoMixin:
+    def tearDown(self):
+        raise RuntimeError("deliberate error")
+
+    def test_todo1(self):
+        pass
+
+    test_todo1.todo = "tearDown todo1"  # type: ignore[attr-defined]
+
+
+class SynchronousTearDownTodo(TearDownTodoMixin, SynchronousTestCase):
+    pass
+
+
+class AsynchronousTearDownTodo(TearDownTodoMixin, TestCase):
+    pass
+
+
+class TodoClassMixin:
+    todo = "class"
+
+    def test_todo1(self):
+        pass
+
+    test_todo1.todo = "method"  # type: ignore[attr-defined]
+
+    def test_todo2(self):
+        pass
+
+    def test_todo3(self):
+        self.fail("Deliberate Failure")
+
+    test_todo3.todo = "method"  # type: ignore[attr-defined]
+
+    def test_todo4(self):
+        self.fail("Deliberate Failure")
+
+
+class SynchronousTodoClass(TodoClassMixin, SynchronousTestCase):
+    pass
+
+
+class AsynchronousTodoClass(TodoClassMixin, TestCase):
+    pass
+
+
+class StrictTodoMixin:
+    def test_todo1(self):
+        raise RuntimeError("expected failure")
+
+    test_todo1.todo = (RuntimeError, "todo1")  # type: ignore[attr-defined]
+
+    def test_todo2(self):
+        raise RuntimeError("expected failure")
+
+    test_todo2.todo = ((RuntimeError, OSError), "todo2")  # type: ignore[attr-defined]
+
+    def test_todo3(self):
+        raise RuntimeError("we had no idea!")
+
+    test_todo3.todo = (OSError, "todo3")  # type: ignore[attr-defined]
+
+    def test_todo4(self):
+        raise RuntimeError("we had no idea!")
+
+    test_todo4.todo = ((OSError, SyntaxError), "todo4")  # type: ignore[attr-defined]
+
+    def test_todo5(self):
+        self.fail("deliberate failure")
+
+    test_todo5.todo = (FailTest, "todo5")  # type: ignore[attr-defined]
+
+    def test_todo6(self):
+        self.fail("deliberate failure")
+
+    test_todo6.todo = (RuntimeError, "todo6")  # type: ignore[attr-defined]
+
+    def test_todo7(self):
+        pass
+
+    test_todo7.todo = (RuntimeError, "todo7")  # type: ignore[attr-defined]
+
+
+class SynchronousStrictTodo(StrictTodoMixin, SynchronousTestCase):
+    pass
+
+
+class AsynchronousStrictTodo(StrictTodoMixin, TestCase):
+    pass
+
+
+class AddCleanupMixin:
+    def setUp(self):
+        self.log = ["setUp"]
+
+    def brokenSetUp(self):
+        self.log = ["setUp"]
+        raise RuntimeError("Deliberate failure")
+
+    def skippingSetUp(self):
+        self.log = ["setUp"]
+        raise SkipTest("Don't do this")
+
+    def append(self, thing):
+        self.log.append(thing)
+
+    def tearDown(self):
+        self.log.append("tearDown")
+
+    def runTest(self):
+        self.log.append("runTest")
+
+
+class SynchronousAddCleanup(AddCleanupMixin, SynchronousTestCase):
+    pass
+
+
+class AsynchronousAddCleanup(AddCleanupMixin, TestCase):
+    pass
+
+
+class ExpectedFailure(SynchronousTestCase):
+    """
+    Hold a test that has an expected failure with an exception that has a
+    large string representation.
+    """
+
+    def test_expectedFailureGreaterThan64k(self) -> None:
+        """
+        Fail, but expectedly.
+        """
+        raise RuntimeError("x" * (2 ** 16 + 1))
+
+    test_expectedFailureGreaterThan64k.todo = "short todo string"  # type: ignore[attr-defined]

environment/Lib/site-packages/twisted/trial/test/suppression.py

@@ -0,0 +1,118 @@
+# -*- test-case-name: twisted.trial.test.test_tests -*-
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Test cases used to make sure that warning suppression works at the module,
+method, and class levels.
+
+See the L{twisted.trial.test.test_tests} module docstring for details about how
+this code is arranged.
+"""
+
+
+import warnings
+
+from twisted.trial import unittest, util
+
+METHOD_WARNING_MSG = "method warning message"
+CLASS_WARNING_MSG = "class warning message"
+MODULE_WARNING_MSG = "module warning message"
+
+
+class MethodWarning(Warning):
+    pass
+
+
+class ClassWarning(Warning):
+    pass
+
+
+class ModuleWarning(Warning):
+    pass
+
+
+class EmitMixin:
+    """
+    Mixin for emiting a variety of warnings.
+    """
+
+    def _emit(self):
+        warnings.warn(METHOD_WARNING_MSG, MethodWarning)
+        warnings.warn(CLASS_WARNING_MSG, ClassWarning)
+        warnings.warn(MODULE_WARNING_MSG, ModuleWarning)
+
+
+class SuppressionMixin(EmitMixin):
+    suppress = [util.suppress(message=CLASS_WARNING_MSG)]
+
+    def testSuppressMethod(self):
+        self._emit()
+
+    testSuppressMethod.suppress = [util.suppress(message=METHOD_WARNING_MSG)]  # type: ignore[attr-defined]
+
+    def testSuppressClass(self):
+        self._emit()
+
+    def testOverrideSuppressClass(self):
+        self._emit()
+
+    testOverrideSuppressClass.suppress = []  # type: ignore[attr-defined]
+
+
+class SetUpSuppressionMixin:
+    def setUp(self):
+        self._emit()
+
+
+class TearDownSuppressionMixin:
+    def tearDown(self):
+        self._emit()
+
+
+class TestSuppression2Mixin(EmitMixin):
+    def testSuppressModule(self):
+        self._emit()
+
+
+suppress = [util.suppress(message=MODULE_WARNING_MSG)]
+
+
+class SynchronousTestSuppression(SuppressionMixin, unittest.SynchronousTestCase):
+    pass
+
+
+class SynchronousTestSetUpSuppression(
+    SetUpSuppressionMixin, SynchronousTestSuppression
+):
+    pass
+
+
+class SynchronousTestTearDownSuppression(
+    TearDownSuppressionMixin, SynchronousTestSuppression
+):
+    pass
+
+
+class SynchronousTestSuppression2(TestSuppression2Mixin, unittest.SynchronousTestCase):
+    pass
+
+
+class AsynchronousTestSuppression(SuppressionMixin, unittest.TestCase):
+    pass
+
+
+class AsynchronousTestSetUpSuppression(
+    SetUpSuppressionMixin, AsynchronousTestSuppression
+):
+    pass
+
+
+class AsynchronousTestTearDownSuppression(
+    TearDownSuppressionMixin, AsynchronousTestSuppression
+):
+    pass
+
+
+class AsynchronousTestSuppression2(TestSuppression2Mixin, unittest.TestCase):
+    pass

environment/Lib/site-packages/twisted/trial/test/test_asyncassertions.py

@@ -0,0 +1,84 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Tests for async assertions provided by C{twisted.trial.unittest.TestCase}.
+"""
+
+
+import unittest as pyunit
+
+from twisted.internet import defer
+from twisted.python import failure
+from twisted.trial import unittest
+
+
+class AsynchronousAssertionsTests(unittest.TestCase):
+    """
+    Tests for L{TestCase}'s asynchronous extensions to L{SynchronousTestCase}.
+    That is, assertFailure.
+    """
+
+    def test_assertFailure(self):
+        d = defer.maybeDeferred(lambda: 1 / 0)
+        return self.assertFailure(d, ZeroDivisionError)
+
+    def test_assertFailure_wrongException(self):
+        d = defer.maybeDeferred(lambda: 1 / 0)
+        self.assertFailure(d, OverflowError)
+        d.addCallbacks(
+            lambda x: self.fail("Should have failed"),
+            lambda x: x.trap(self.failureException),
+        )
+        return d
+
+    def test_assertFailure_noException(self):
+        d = defer.succeed(None)
+        self.assertFailure(d, ZeroDivisionError)
+        d.addCallbacks(
+            lambda x: self.fail("Should have failed"),
+            lambda x: x.trap(self.failureException),
+        )
+        return d
+
+    def test_assertFailure_moreInfo(self):
+        """
+        In the case of assertFailure failing, check that we get lots of
+        information about the exception that was raised.
+        """
+        try:
+            1 / 0
+        except ZeroDivisionError:
+            f = failure.Failure()
+            d = defer.fail(f)
+        d = self.assertFailure(d, RuntimeError)
+        d.addErrback(self._checkInfo, f)
+        return d
+
+    def _checkInfo(self, assertionFailure, f):
+        assert assertionFailure.check(self.failureException)
+        output = assertionFailure.getErrorMessage()
+        self.assertIn(f.getErrorMessage(), output)
+        self.assertIn(f.getBriefTraceback(), output)
+
+    def test_assertFailure_masked(self):
+        """
+        A single wrong assertFailure should fail the whole test.
+        """
+
+        class ExampleFailure(Exception):
+            pass
+
+        class TC(unittest.TestCase):
+            failureException = ExampleFailure
+
+            def test_assertFailure(self):
+                d = defer.maybeDeferred(lambda: 1 / 0)
+                self.assertFailure(d, OverflowError)
+                self.assertFailure(d, ZeroDivisionError)
+                return d
+
+        test = TC("test_assertFailure")
+        result = pyunit.TestResult()
+        test.run(result)
+        self.assertEqual(1, len(result.failures))

environment/Lib/site-packages/twisted/trial/test/test_deferred.py

@@ -0,0 +1,246 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Tests for returning Deferreds from a TestCase.
+"""
+
+
+import unittest as pyunit
+
+from twisted.internet import defer
+from twisted.trial import reporter, unittest, util
+from twisted.trial.test import detests
+
+
+class SetUpTests(unittest.TestCase):
+    def _loadSuite(self, klass):
+        loader = pyunit.TestLoader()
+        r = reporter.TestResult()
+        s = loader.loadTestsFromTestCase(klass)
+        return r, s
+
+    def test_success(self):
+        result, suite = self._loadSuite(detests.DeferredSetUpOK)
+        suite(result)
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+
+    def test_fail(self):
+        self.assertFalse(detests.DeferredSetUpFail.testCalled)
+        result, suite = self._loadSuite(detests.DeferredSetUpFail)
+        suite(result)
+        self.assertFalse(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.failures), 0)
+        self.assertEqual(len(result.errors), 1)
+        self.assertFalse(detests.DeferredSetUpFail.testCalled)
+
+    def test_callbackFail(self):
+        self.assertFalse(detests.DeferredSetUpCallbackFail.testCalled)
+        result, suite = self._loadSuite(detests.DeferredSetUpCallbackFail)
+        suite(result)
+        self.assertFalse(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.failures), 0)
+        self.assertEqual(len(result.errors), 1)
+        self.assertFalse(detests.DeferredSetUpCallbackFail.testCalled)
+
+    def test_error(self):
+        self.assertFalse(detests.DeferredSetUpError.testCalled)
+        result, suite = self._loadSuite(detests.DeferredSetUpError)
+        suite(result)
+        self.assertFalse(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.failures), 0)
+        self.assertEqual(len(result.errors), 1)
+        self.assertFalse(detests.DeferredSetUpError.testCalled)
+
+    def test_skip(self):
+        self.assertFalse(detests.DeferredSetUpSkip.testCalled)
+        result, suite = self._loadSuite(detests.DeferredSetUpSkip)
+        suite(result)
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.failures), 0)
+        self.assertEqual(len(result.errors), 0)
+        self.assertEqual(len(result.skips), 1)
+        self.assertFalse(detests.DeferredSetUpSkip.testCalled)
+
+
+class NeverFireTests(unittest.TestCase):
+    def setUp(self):
+        self._oldTimeout = util.DEFAULT_TIMEOUT_DURATION
+        util.DEFAULT_TIMEOUT_DURATION = 0.1
+
+    def tearDown(self):
+        util.DEFAULT_TIMEOUT_DURATION = self._oldTimeout
+
+    def _loadSuite(self, klass):
+        loader = pyunit.TestLoader()
+        r = reporter.TestResult()
+        s = loader.loadTestsFromTestCase(klass)
+        return r, s
+
+    def test_setUp(self):
+        self.assertFalse(detests.DeferredSetUpNeverFire.testCalled)
+        result, suite = self._loadSuite(detests.DeferredSetUpNeverFire)
+        suite(result)
+        self.assertFalse(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.failures), 0)
+        self.assertEqual(len(result.errors), 1)
+        self.assertFalse(detests.DeferredSetUpNeverFire.testCalled)
+        self.assertTrue(result.errors[0][1].check(defer.TimeoutError))
+
+
+class TestTester(unittest.TestCase):
+    def getTest(self, name):
+        raise NotImplementedError("must override me")
+
+    def runTest(self, name):
+        result = reporter.TestResult()
+        self.getTest(name).run(result)
+        return result
+
+
+class DeferredTests(TestTester):
+    def getTest(self, name):
+        return detests.DeferredTests(name)
+
+    def test_pass(self):
+        result = self.runTest("test_pass")
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+
+    def test_passGenerated(self):
+        result = self.runTest("test_passGenerated")
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertTrue(detests.DeferredTests.touched)
+
+    test_passGenerated.supress = [  # type: ignore[attr-defined]
+        util.suppress(message="twisted.internet.defer.deferredGenerator is deprecated")
+    ]
+
+    def test_passInlineCallbacks(self):
+        """
+        The body of a L{defer.inlineCallbacks} decorated test gets run.
+        """
+        result = self.runTest("test_passInlineCallbacks")
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertTrue(detests.DeferredTests.touched)
+
+    def test_fail(self):
+        result = self.runTest("test_fail")
+        self.assertFalse(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.failures), 1)
+
+    def test_failureInCallback(self):
+        result = self.runTest("test_failureInCallback")
+        self.assertFalse(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.failures), 1)
+
+    def test_errorInCallback(self):
+        result = self.runTest("test_errorInCallback")
+        self.assertFalse(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.errors), 1)
+
+    def test_skip(self):
+        result = self.runTest("test_skip")
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.skips), 1)
+        self.assertFalse(detests.DeferredTests.touched)
+
+    def test_todo(self):
+        result = self.runTest("test_expectedFailure")
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.errors), 0)
+        self.assertEqual(len(result.failures), 0)
+        self.assertEqual(len(result.expectedFailures), 1)
+
+    def test_thread(self):
+        result = self.runTest("test_thread")
+        self.assertEqual(result.testsRun, 1)
+        self.assertTrue(result.wasSuccessful(), result.errors)
+
+
+class TimeoutTests(TestTester):
+    def getTest(self, name):
+        return detests.TimeoutTests(name)
+
+    def _wasTimeout(self, error):
+        self.assertEqual(error.check(defer.TimeoutError), defer.TimeoutError)
+
+    def test_pass(self):
+        result = self.runTest("test_pass")
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+
+    def test_passDefault(self):
+        result = self.runTest("test_passDefault")
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+
+    def test_timeout(self):
+        result = self.runTest("test_timeout")
+        self.assertFalse(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.errors), 1)
+        self._wasTimeout(result.errors[0][1])
+
+    def test_timeoutZero(self):
+        result = self.runTest("test_timeoutZero")
+        self.assertFalse(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.errors), 1)
+        self._wasTimeout(result.errors[0][1])
+
+    def test_skip(self):
+        result = self.runTest("test_skip")
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.skips), 1)
+
+    def test_todo(self):
+        result = self.runTest("test_expectedFailure")
+        self.assertTrue(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.expectedFailures), 1)
+        self._wasTimeout(result.expectedFailures[0][1])
+
+    def test_errorPropagation(self):
+        result = self.runTest("test_errorPropagation")
+        self.assertFalse(result.wasSuccessful())
+        self.assertEqual(result.testsRun, 1)
+        self._wasTimeout(detests.TimeoutTests.timedOut)
+
+    def test_classTimeout(self):
+        loader = pyunit.TestLoader()
+        suite = loader.loadTestsFromTestCase(detests.TestClassTimeoutAttribute)
+        result = reporter.TestResult()
+        suite.run(result)
+        self.assertEqual(len(result.errors), 1)
+        self._wasTimeout(result.errors[0][1])
+
+    def test_callbackReturnsNonCallingDeferred(self):
+        # hacky timeout
+        # raises KeyboardInterrupt because Trial sucks
+        from twisted.internet import reactor
+
+        call = reactor.callLater(2, reactor.crash)
+        result = self.runTest("test_calledButNeverCallback")
+        if call.active():
+            call.cancel()
+        self.assertFalse(result.wasSuccessful())
+        self._wasTimeout(result.errors[0][1])
+
+
+# The test loader erroneously attempts to run this:
+del TestTester

environment/Lib/site-packages/twisted/trial/test/test_doctest.py

@@ -0,0 +1,59 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Test Twisted's doctest support.
+"""
+
+
+from twisted.trial import itrial, reporter, runner, unittest
+from twisted.trial.test import mockdoctest
+
+
+class RunnersTests(unittest.SynchronousTestCase):
+    """
+    Tests for Twisted's doctest support.
+    """
+
+    def test_id(self):
+        """
+        Check that the id() of the doctests' case object contains the FQPN of
+        the actual tests.
+        """
+        loader = runner.TestLoader()
+        suite = loader.loadDoctests(mockdoctest)
+        idPrefix = "twisted.trial.test.mockdoctest.Counter"
+        for test in suite._tests:
+            self.assertIn(idPrefix, itrial.ITestCase(test).id())
+
+    def test_basicTrialIntegration(self):
+        """
+        L{loadDoctests} loads all of the doctests in the given module.
+        """
+        loader = runner.TestLoader()
+        suite = loader.loadDoctests(mockdoctest)
+        self.assertEqual(7, suite.countTestCases())
+
+    def _testRun(self, suite):
+        """
+        Run C{suite} and check the result.
+        """
+        result = reporter.TestResult()
+        suite.run(result)
+        self.assertEqual(5, result.successes)
+        self.assertEqual(2, len(result.failures))
+
+    def test_expectedResults(self, count=1):
+        """
+        Trial can correctly run doctests with its xUnit test APIs.
+        """
+        suite = runner.TestLoader().loadDoctests(mockdoctest)
+        self._testRun(suite)
+
+    def test_repeatable(self):
+        """
+        Doctests should be runnable repeatably.
+        """
+        suite = runner.TestLoader().loadDoctests(mockdoctest)
+        self._testRun(suite)
+        self._testRun(suite)

environment/Lib/site-packages/twisted/trial/test/test_keyboard.py

@@ -0,0 +1,116 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Tests for interrupting tests with Control-C.
+"""
+
+
+from io import StringIO
+
+from twisted.trial import reporter, runner, unittest
+
+
+class TrialTest(unittest.SynchronousTestCase):
+    def setUp(self):
+        self.output = StringIO()
+        self.reporter = reporter.TestResult()
+        self.loader = runner.TestLoader()
+
+
+class InterruptInTestTests(TrialTest):
+    class InterruptedTest(unittest.TestCase):
+        def test_02_raiseInterrupt(self):
+            raise KeyboardInterrupt
+
+        def test_01_doNothing(self):
+            pass
+
+        def test_03_doNothing(self):
+            InterruptInTestTests.test_03_doNothing_run = True
+
+    def setUp(self):
+        super().setUp()
+        self.suite = self.loader.loadClass(InterruptInTestTests.InterruptedTest)
+        InterruptInTestTests.test_03_doNothing_run = None
+
+    def test_setUpOK(self):
+        self.assertEqual(3, self.suite.countTestCases())
+        self.assertEqual(0, self.reporter.testsRun)
+        self.assertFalse(self.reporter.shouldStop)
+
+    def test_interruptInTest(self):
+        runner.TrialSuite([self.suite]).run(self.reporter)
+        self.assertTrue(self.reporter.shouldStop)
+        self.assertEqual(2, self.reporter.testsRun)
+        self.assertFalse(
+            InterruptInTestTests.test_03_doNothing_run, "test_03_doNothing ran."
+        )
+
+
+class InterruptInSetUpTests(TrialTest):
+    testsRun = 0
+
+    class InterruptedTest(unittest.TestCase):
+        def setUp(self):
+            if InterruptInSetUpTests.testsRun > 0:
+                raise KeyboardInterrupt
+
+        def test_01(self):
+            InterruptInSetUpTests.testsRun += 1
+
+        def test_02(self):
+            InterruptInSetUpTests.testsRun += 1
+            InterruptInSetUpTests.test_02_run = True
+
+    def setUp(self):
+        super().setUp()
+        self.suite = self.loader.loadClass(InterruptInSetUpTests.InterruptedTest)
+        InterruptInSetUpTests.test_02_run = False
+        InterruptInSetUpTests.testsRun = 0
+
+    def test_setUpOK(self):
+        self.assertEqual(0, InterruptInSetUpTests.testsRun)
+        self.assertEqual(2, self.suite.countTestCases())
+        self.assertEqual(0, self.reporter.testsRun)
+        self.assertFalse(self.reporter.shouldStop)
+
+    def test_interruptInSetUp(self):
+        runner.TrialSuite([self.suite]).run(self.reporter)
+        self.assertTrue(self.reporter.shouldStop)
+        self.assertEqual(2, self.reporter.testsRun)
+        self.assertFalse(InterruptInSetUpTests.test_02_run, "test_02 ran")
+
+
+class InterruptInTearDownTests(TrialTest):
+    testsRun = 0
+
+    class InterruptedTest(unittest.TestCase):
+        def tearDown(self):
+            if InterruptInTearDownTests.testsRun > 0:
+                raise KeyboardInterrupt
+
+        def test_01(self):
+            InterruptInTearDownTests.testsRun += 1
+
+        def test_02(self):
+            InterruptInTearDownTests.testsRun += 1
+            InterruptInTearDownTests.test_02_run = True
+
+    def setUp(self):
+        super().setUp()
+        self.suite = self.loader.loadClass(InterruptInTearDownTests.InterruptedTest)
+        InterruptInTearDownTests.testsRun = 0
+        InterruptInTearDownTests.test_02_run = False
+
+    def test_setUpOK(self):
+        self.assertEqual(0, InterruptInTearDownTests.testsRun)
+        self.assertEqual(2, self.suite.countTestCases())
+        self.assertEqual(0, self.reporter.testsRun)
+        self.assertFalse(self.reporter.shouldStop)
+
+    def test_interruptInTearDown(self):
+        runner.TrialSuite([self.suite]).run(self.reporter)
+        self.assertEqual(1, self.reporter.testsRun)
+        self.assertTrue(self.reporter.shouldStop)
+        self.assertFalse(InterruptInTearDownTests.test_02_run, "test_02 ran")

environment/Lib/site-packages/twisted/trial/test/test_loader.py

@@ -0,0 +1,637 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Tests for loading tests by name.
+"""
+
+
+import os
+import sys
+import unittest as pyunit
+from hashlib import md5
+from operator import attrgetter
+from types import ModuleType
+
+from hamcrest import assert_that, equal_to, has_properties
+from hamcrest.core.matcher import Matcher
+
+from twisted.python import filepath, util
+from twisted.python.modules import getModule
+from twisted.python.reflect import ModuleNotFound
+from twisted.trial import reporter, runner, unittest
+from twisted.trial._asyncrunner import _iterateTests
+from twisted.trial.itrial import ITestCase
+from twisted.trial.test import packages
+from .matchers import after
+
+
+def testNames(tests):
+    """
+    Return the id of each test within the given test suite or case.
+    """
+    names = []
+    for test in _iterateTests(tests):
+        names.append(test.id())
+    return names
+
+
+class FinderPy3Tests(packages.SysPathManglingTest):
+    def setUp(self):
+        super().setUp()
+        self.loader = runner.TestLoader()
+
+    def test_findNonModule(self):
+        """
+        findByName, if given something findable up until the last entry, will
+        raise AttributeError (as it cannot tell if 'nonexistent' here is
+        supposed to be a module or a class).
+        """
+        self.assertRaises(
+            AttributeError, self.loader.findByName, "twisted.trial.test.nonexistent"
+        )
+
+    def test_findNonPackage(self):
+        self.assertRaises(ModuleNotFound, self.loader.findByName, "nonextant")
+
+    def test_findNonFile(self):
+        """
+        findByName, given a file path that doesn't exist, will raise a
+        ValueError saying that it is not a Python file.
+        """
+        path = util.sibpath(__file__, "nonexistent.py")
+        self.assertRaises(ValueError, self.loader.findByName, path)
+
+    def test_findFileWithImportError(self):
+        """
+        findByName will re-raise ImportErrors inside modules that it has found
+        and imported.
+        """
+        self.assertRaises(
+            ImportError, self.loader.findByName, "unimportablepackage.test_module"
+        )
+
+
+def looselyResembles(module: ModuleType) -> Matcher[ModuleType]:
+    """
+    Match a module with a L{ModuleSpec} like that of the given module.
+
+    @return: A matcher for a module spec that has the same name and origin as
+        the given module spec, though the origin may be structurally inequal
+        as long as it is semantically equal.
+    """
+    expected = module.__spec__
+    # Technically possible but not expected in any of the tests written so
+    # far.
+    assert expected is not None
+    match_spec = has_properties(
+        {
+            "name": equal_to(expected.name),
+            "origin": after(
+                filepath.FilePath,
+                equal_to(filepath.FilePath(expected.origin)),
+            ),
+        }
+    )
+    return after(attrgetter("__spec__"), match_spec)
+
+
+class FileTests(packages.SysPathManglingTest):
+    """
+    Tests for L{runner.filenameToModule}.
+    """
+
+    def test_notFile(self):
+        """
+        L{runner.filenameToModule} raises a C{ValueError} when a non-existing
+        file is passed.
+        """
+        err = self.assertRaises(ValueError, runner.filenameToModule, "it")
+        self.assertEqual(str(err), "'it' doesn't exist")
+
+    def test_moduleInPath(self):
+        """
+        If the file in question is a module on the Python path, then it should
+        properly import and return that module.
+        """
+        sample1 = runner.filenameToModule(util.sibpath(__file__, "sample.py"))
+        from twisted.trial.test import sample as sample2
+
+        self.assertEqual(sample2, sample1)
+
+    def test_moduleNotInPath(self) -> None:
+        """
+        If passed the path to a file containing the implementation of a
+        module within a package which is not on the import path,
+        L{runner.filenameToModule} returns a module object loosely
+        resembling the module defined by that file anyway.
+        """
+
+        self.mangleSysPath(self.oldPath)
+        sample1 = runner.filenameToModule(
+            os.path.join(self.parent, "goodpackage", "test_sample.py")
+        )
+        self.assertEqual(sample1.__name__, "goodpackage.test_sample")
+
+        self.cleanUpModules()
+        self.mangleSysPath(self.newPath)
+        from goodpackage import test_sample as sample2  # type: ignore[import]
+
+        self.assertIsNot(sample1, sample2)
+        assert_that(sample1, looselyResembles(sample2))
+
+    def test_packageInPath(self):
+        """
+        If the file in question is a package on the Python path, then it should
+        properly import and return that package.
+        """
+        package1 = runner.filenameToModule(os.path.join(self.parent, "goodpackage"))
+
+        self.assertIs(package1, sys.modules["goodpackage"])
+
+    def test_packageNotInPath(self) -> None:
+        """
+        If passed the path to a directory which represents a package which
+        is not on the import path, L{runner.filenameToModule} returns a
+        module object loosely resembling the package defined by that
+        directory anyway.
+        """
+        self.mangleSysPath(self.oldPath)
+        package1 = runner.filenameToModule(os.path.join(self.parent, "goodpackage"))
+        self.assertEqual(package1.__name__, "goodpackage")
+
+        self.cleanUpModules()
+        self.mangleSysPath(self.newPath)
+        import goodpackage
+
+        self.assertIsNot(package1, goodpackage)
+        assert_that(package1, looselyResembles(goodpackage))
+
+    def test_directoryNotPackage(self):
+        """
+        L{runner.filenameToModule} raises a C{ValueError} when the name of an
+        empty directory is passed that isn't considered a valid Python package
+        because it doesn't contain a C{__init__.py} file.
+        """
+        emptyDir = filepath.FilePath(self.parent).child("emptyDirectory")
+        emptyDir.createDirectory()
+
+        err = self.assertRaises(ValueError, runner.filenameToModule, emptyDir.path)
+        self.assertEqual(str(err), f"{emptyDir.path!r} is not a package directory")
+
+    def test_filenameNotPython(self):
+        """
+        L{runner.filenameToModule} raises a C{SyntaxError} when a non-Python
+        file is passed.
+        """
+        filename = filepath.FilePath(self.parent).child("notpython")
+        filename.setContent(b"This isn't python")
+        self.assertRaises(SyntaxError, runner.filenameToModule, filename.path)
+
+    def test_filenameMatchesPackage(self):
+        """
+        The C{__file__} attribute of the module should match the package name.
+        """
+        filename = filepath.FilePath(self.parent).child("goodpackage.py")
+        filename.setContent(packages.testModule.encode("utf8"))
+
+        try:
+            module = runner.filenameToModule(filename.path)
+            self.assertEqual(filename.path, module.__file__)
+        finally:
+            filename.remove()
+
+    def test_directory(self):
+        """
+        Test loader against a filesystem directory containing an empty
+        C{__init__.py} file. It should handle 'path' and 'path/' the same way.
+        """
+        goodDir = filepath.FilePath(self.parent).child("goodDirectory")
+        goodDir.createDirectory()
+        goodDir.child("__init__.py").setContent(b"")
+
+        try:
+            module = runner.filenameToModule(goodDir.path)
+            self.assertTrue(module.__name__.endswith("goodDirectory"))
+            module = runner.filenameToModule(goodDir.path + os.path.sep)
+            self.assertTrue(module.__name__.endswith("goodDirectory"))
+        finally:
+            goodDir.remove()
+
+
+class LoaderTests(packages.SysPathManglingTest):
+    """
+    Tests for L{trial.TestLoader}.
+    """
+
+    def setUp(self):
+        self.loader = runner.TestLoader()
+        packages.SysPathManglingTest.setUp(self)
+
+    def test_sortCases(self):
+        from twisted.trial.test import sample
+
+        suite = self.loader.loadClass(sample.AlphabetTest)
+        self.assertEqual(
+            ["test_a", "test_b", "test_c"],
+            [test._testMethodName for test in suite._tests],
+        )
+        newOrder = ["test_b", "test_c", "test_a"]
+        sortDict = dict(zip(newOrder, range(3)))
+        self.loader.sorter = lambda x: sortDict.get(x.shortDescription(), -1)
+        suite = self.loader.loadClass(sample.AlphabetTest)
+        self.assertEqual(newOrder, [test._testMethodName for test in suite._tests])
+
+    def test_loadFailure(self):
+        """
+        Loading a test that fails and getting the result of it ends up with one
+        test ran and one failure.
+        """
+        suite = self.loader.loadByName(
+            "twisted.trial.test.erroneous.TestRegularFail.test_fail"
+        )
+        result = reporter.TestResult()
+        suite.run(result)
+        self.assertEqual(result.testsRun, 1)
+        self.assertEqual(len(result.failures), 1)
+
+    def test_loadBadDecorator(self):
+        """
+        A decorated test method for which the decorator has failed to set the
+        method's __name__ correctly is loaded and its name in the class scope
+        discovered.
+        """
+        from twisted.trial.test import sample
+
+        suite = self.loader.loadAnything(
+            sample.DecorationTest.test_badDecorator,
+            parent=sample.DecorationTest,
+            qualName=["sample", "DecorationTest", "test_badDecorator"],
+        )
+        self.assertEqual(1, suite.countTestCases())
+        self.assertEqual("test_badDecorator", suite._testMethodName)
+
+    def test_loadGoodDecorator(self):
+        """
+        A decorated test method for which the decorator has set the method's
+        __name__ correctly is loaded and the only name by which it goes is used.
+        """
+        from twisted.trial.test import sample
+
+        suite = self.loader.loadAnything(
+            sample.DecorationTest.test_goodDecorator,
+            parent=sample.DecorationTest,
+            qualName=["sample", "DecorationTest", "test_goodDecorator"],
+        )
+        self.assertEqual(1, suite.countTestCases())
+        self.assertEqual("test_goodDecorator", suite._testMethodName)
+
+    def test_loadRenamedDecorator(self):
+        """
+        Load a decorated method which has been copied to a new name inside the
+        class.  Thus its __name__ and its key in the class's __dict__ no
+        longer match.
+        """
+        from twisted.trial.test import sample
+
+        suite = self.loader.loadAnything(
+            sample.DecorationTest.test_renamedDecorator,
+            parent=sample.DecorationTest,
+            qualName=["sample", "DecorationTest", "test_renamedDecorator"],
+        )
+        self.assertEqual(1, suite.countTestCases())
+        self.assertEqual("test_renamedDecorator", suite._testMethodName)
+
+    def test_loadClass(self):
+        from twisted.trial.test import sample
+
+        suite = self.loader.loadClass(sample.FooTest)
+        self.assertEqual(2, suite.countTestCases())
+        self.assertEqual(
+            ["test_bar", "test_foo"], [test._testMethodName for test in suite._tests]
+        )
+
+    def test_loadNonClass(self):
+        from twisted.trial.test import sample
+
+        self.assertRaises(TypeError, self.loader.loadClass, sample)
+        self.assertRaises(TypeError, self.loader.loadClass, sample.FooTest.test_foo)
+        self.assertRaises(TypeError, self.loader.loadClass, "string")
+        self.assertRaises(TypeError, self.loader.loadClass, ("foo", "bar"))
+
+    def test_loadNonTestCase(self):
+        from twisted.trial.test import sample
+
+        self.assertRaises(ValueError, self.loader.loadClass, sample.NotATest)
+
+    def test_loadModule(self):
+        from twisted.trial.test import sample
+
+        suite = self.loader.loadModule(sample)
+        self.assertEqual(10, suite.countTestCases())
+
+    def test_loadNonModule(self):
+        from twisted.trial.test import sample
+
+        self.assertRaises(TypeError, self.loader.loadModule, sample.FooTest)
+        self.assertRaises(TypeError, self.loader.loadModule, sample.FooTest.test_foo)
+        self.assertRaises(TypeError, self.loader.loadModule, "string")
+        self.assertRaises(TypeError, self.loader.loadModule, ("foo", "bar"))
+
+    def test_loadPackage(self):
+        import goodpackage
+
+        suite = self.loader.loadPackage(goodpackage)
+        self.assertEqual(7, suite.countTestCases())
+
+    def test_loadNonPackage(self):
+        from twisted.trial.test import sample
+
+        self.assertRaises(TypeError, self.loader.loadPackage, sample.FooTest)
+        self.assertRaises(TypeError, self.loader.loadPackage, sample.FooTest.test_foo)
+        self.assertRaises(TypeError, self.loader.loadPackage, "string")
+        self.assertRaises(TypeError, self.loader.loadPackage, ("foo", "bar"))
+
+    def test_loadModuleAsPackage(self):
+        from twisted.trial.test import sample
+
+        ## XXX -- should this instead raise a ValueError? -- jml
+        self.assertRaises(TypeError, self.loader.loadPackage, sample)
+
+    def test_loadPackageRecursive(self):
+        import goodpackage
+
+        suite = self.loader.loadPackage(goodpackage, recurse=True)
+        self.assertEqual(14, suite.countTestCases())
+
+    def test_loadAnythingOnModule(self):
+        from twisted.trial.test import sample
+
+        suite = self.loader.loadAnything(sample)
+        self.assertEqual(
+            sample.__name__, suite._tests[0]._tests[0].__class__.__module__
+        )
+
+    def test_loadAnythingOnClass(self):
+        from twisted.trial.test import sample
+
+        suite = self.loader.loadAnything(sample.FooTest)
+        self.assertEqual(2, suite.countTestCases())
+
+    def test_loadAnythingOnPackage(self):
+        import goodpackage
+
+        suite = self.loader.loadAnything(goodpackage)
+        self.assertTrue(isinstance(suite, self.loader.suiteFactory))
+        self.assertEqual(7, suite.countTestCases())
+
+    def test_loadAnythingOnPackageRecursive(self):
+        import goodpackage
+
+        suite = self.loader.loadAnything(goodpackage, recurse=True)
+        self.assertTrue(isinstance(suite, self.loader.suiteFactory))
+        self.assertEqual(14, suite.countTestCases())
+
+    def test_loadAnythingOnString(self):
+        # the important thing about this test is not the string-iness
+        # but the non-handledness.
+        self.assertRaises(TypeError, self.loader.loadAnything, "goodpackage")
+
+    def test_importErrors(self):
+        import package  # type: ignore[import]
+
+        suite = self.loader.loadPackage(package, recurse=True)
+        result = reporter.Reporter()
+        suite.run(result)
+        self.assertEqual(False, result.wasSuccessful())
+        self.assertEqual(2, len(result.errors))
+        errors = [test.id() for test, error in result.errors]
+        errors.sort()
+        self.assertEqual(
+            errors, ["package.test_bad_module", "package.test_import_module"]
+        )
+
+    def test_differentInstances(self):
+        """
+        L{TestLoader.loadClass} returns a suite with each test method
+        represented by a different instances of the L{TestCase} they are
+        defined on.
+        """
+
+        class DistinctInstances(pyunit.TestCase):
+            def test_1(self):
+                self.first = "test1Run"
+
+            def test_2(self):
+                self.assertFalse(hasattr(self, "first"))
+
+        suite = self.loader.loadClass(DistinctInstances)
+        result = reporter.Reporter()
+        suite.run(result)
+        self.assertTrue(result.wasSuccessful())
+
+    def test_loadModuleWith_test_suite(self):
+        """
+        Check that C{test_suite} is used when present and other L{TestCase}s are
+        not included.
+        """
+        from twisted.trial.test import mockcustomsuite
+
+        suite = self.loader.loadModule(mockcustomsuite)
+        self.assertEqual(0, suite.countTestCases())
+        self.assertEqual("MyCustomSuite", getattr(suite, "name", None))
+
+    def test_loadModuleWith_testSuite(self):
+        """
+        Check that C{testSuite} is used when present and other L{TestCase}s are
+        not included.
+        """
+        from twisted.trial.test import mockcustomsuite2
+
+        suite = self.loader.loadModule(mockcustomsuite2)
+        self.assertEqual(0, suite.countTestCases())
+        self.assertEqual("MyCustomSuite", getattr(suite, "name", None))
+
+    def test_loadModuleWithBothCustom(self):
+        """
+        Check that if C{testSuite} and C{test_suite} are both present in a
+        module then C{testSuite} gets priority.
+        """
+        from twisted.trial.test import mockcustomsuite3
+
+        suite = self.loader.loadModule(mockcustomsuite3)
+        self.assertEqual("testSuite", getattr(suite, "name", None))
+
+    def test_customLoadRaisesAttributeError(self):
+        """
+        Make sure that any C{AttributeError}s raised by C{testSuite} are not
+        swallowed by L{TestLoader}.
+        """
+
+        def testSuite():
+            raise AttributeError("should be reraised")
+
+        from twisted.trial.test import mockcustomsuite2
+
+        mockcustomsuite2.testSuite, original = (testSuite, mockcustomsuite2.testSuite)
+        try:
+            self.assertRaises(AttributeError, self.loader.loadModule, mockcustomsuite2)
+        finally:
+            mockcustomsuite2.testSuite = original
+
+    # XXX - duplicated and modified from test_script
+    def assertSuitesEqual(self, test1, test2):
+        names1 = testNames(test1)
+        names2 = testNames(test2)
+        names1.sort()
+        names2.sort()
+        self.assertEqual(names1, names2)
+
+    def test_loadByNamesDuplicate(self):
+        """
+        Check that loadByNames ignores duplicate names
+        """
+        module = "twisted.trial.test.test_log"
+        suite1 = self.loader.loadByNames([module, module], True)
+        suite2 = self.loader.loadByName(module, True)
+        self.assertSuitesEqual(suite1, suite2)
+
+    def test_loadByNamesPreservesOrder(self):
+        """
+        L{TestLoader.loadByNames} preserves the order of tests provided to it.
+        """
+        modules = [
+            "inheritancepackage.test_x.A.test_foo",
+            "twisted.trial.test.sample",
+            "goodpackage",
+            "twisted.trial.test.test_log",
+            "twisted.trial.test.sample.FooTest",
+            "package.test_module",
+        ]
+        suite1 = self.loader.loadByNames(modules)
+        suite2 = runner.TestSuite(map(self.loader.loadByName, modules))
+        self.assertEqual(testNames(suite1), testNames(suite2))
+
+    def test_loadDifferentNames(self):
+        """
+        Check that loadByNames loads all the names that it is given
+        """
+        modules = ["goodpackage", "package.test_module"]
+        suite1 = self.loader.loadByNames(modules)
+        suite2 = runner.TestSuite(map(self.loader.loadByName, modules))
+        self.assertSuitesEqual(suite1, suite2)
+
+    def test_loadInheritedMethods(self):
+        """
+        Check that test methods names which are inherited from are all
+        loaded rather than just one.
+        """
+        methods = [
+            "inheritancepackage.test_x.A.test_foo",
+            "inheritancepackage.test_x.B.test_foo",
+        ]
+        suite1 = self.loader.loadByNames(methods)
+        suite2 = runner.TestSuite(map(self.loader.loadByName, methods))
+        self.assertSuitesEqual(suite1, suite2)
+
+
+class ZipLoadingTests(LoaderTests):
+    def setUp(self):
+        from twisted.python.test.test_zippath import zipit
+
+        LoaderTests.setUp(self)
+        zipit(self.parent, self.parent + ".zip")
+        self.parent += ".zip"
+        self.mangleSysPath(self.oldPath + [self.parent])
+
+
+class PackageOrderingTests(packages.SysPathManglingTest):
+    def setUp(self):
+        self.loader = runner.TestLoader()
+        self.topDir = self.mktemp()
+        parent = os.path.join(self.topDir, "uberpackage")
+        os.makedirs(parent)
+        open(os.path.join(parent, "__init__.py"), "wb").close()
+        packages.SysPathManglingTest.setUp(self, parent)
+        self.mangleSysPath(self.oldPath + [self.topDir])
+
+    def _trialSortAlgorithm(self, sorter):
+        """
+        Right now, halfway by accident, trial sorts like this:
+
+            1. all modules are grouped together in one list and sorted.
+
+            2. within each module, the classes are grouped together in one list
+               and sorted.
+
+            3. finally within each class, each test method is grouped together
+               in a list and sorted.
+
+        This attempts to return a sorted list of testable thingies following
+        those rules, so that we can compare the behavior of loadPackage.
+
+        The things that show as 'cases' are errors from modules which failed to
+        import, and test methods.  Let's gather all those together.
+        """
+        pkg = getModule("uberpackage")
+        testModules = []
+        for testModule in pkg.walkModules():
+            if testModule.name.split(".")[-1].startswith("test_"):
+                testModules.append(testModule)
+        sortedModules = sorted(testModules, key=sorter)  # ONE
+        for modinfo in sortedModules:
+            # Now let's find all the classes.
+            module = modinfo.load(None)
+            if module is None:
+                yield modinfo
+            else:
+                testClasses = []
+                for attrib in modinfo.iterAttributes():
+                    if runner.isTestCase(attrib.load()):
+                        testClasses.append(attrib)
+                sortedClasses = sorted(testClasses, key=sorter)  # TWO
+                for clsinfo in sortedClasses:
+                    testMethods = []
+                    for attr in clsinfo.iterAttributes():
+                        if attr.name.split(".")[-1].startswith("test"):
+                            testMethods.append(attr)
+                    sortedMethods = sorted(testMethods, key=sorter)  # THREE
+                    yield from sortedMethods
+
+    def loadSortedPackages(self, sorter=runner.name):
+        """
+        Verify that packages are loaded in the correct order.
+        """
+        import uberpackage  # type: ignore[import]
+
+        self.loader.sorter = sorter
+        suite = self.loader.loadPackage(uberpackage, recurse=True)
+        # XXX: Work around strange, unexplained Zope crap.
+        # jml, 2007-11-15.
+        suite = unittest.decorate(suite, ITestCase)
+        resultingTests = list(_iterateTests(suite))
+        manifest = list(self._trialSortAlgorithm(sorter))
+        for number, (manifestTest, actualTest) in enumerate(
+            zip(manifest, resultingTests)
+        ):
+            self.assertEqual(
+                manifestTest.name,
+                actualTest.id(),
+                "#%d: %s != %s" % (number, manifestTest.name, actualTest.id()),
+            )
+        self.assertEqual(len(manifest), len(resultingTests))
+
+    def test_sortPackagesDefaultOrder(self):
+        self.loadSortedPackages()
+
+    def test_sortPackagesSillyOrder(self):
+        def sillySorter(s):
+            # This has to work on fully-qualified class names and class
+            # objects, which is silly, but it's the "spec", such as it is.
+            #             if isinstance(s, type):
+            #                 return s.__module__+'.'+s.__name__
+            n = runner.name(s)
+            d = md5(n.encode("utf8")).hexdigest()
+            return d
+
+        self.loadSortedPackages(sillySorter)

environment/Lib/site-packages/twisted/trial/test/test_log.py

@@ -0,0 +1,270 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Test the interaction between trial and errors logged during test run.
+"""
+
+import time
+
+from twisted.internet import reactor, task
+from twisted.python import failure, log
+from twisted.trial import _synctest, reporter, unittest
+
+
+def makeFailure():
+    """
+    Return a new, realistic failure.
+    """
+    try:
+        1 / 0
+    except ZeroDivisionError:
+        f = failure.Failure()
+    return f
+
+
+class Mask:
+    """
+    Hide C{MockTest}s from Trial's automatic test finder.
+    """
+
+    class FailureLoggingMixin:
+        def test_silent(self):
+            """
+            Don't log any errors.
+            """
+
+        def test_single(self):
+            """
+            Log a single error.
+            """
+            log.err(makeFailure())
+
+        def test_double(self):
+            """
+            Log two errors.
+            """
+            log.err(makeFailure())
+            log.err(makeFailure())
+
+        def test_singleThenFail(self):
+            """
+            Log a single error, then fail.
+            """
+            log.err(makeFailure())
+            1 + None
+
+    class SynchronousFailureLogging(FailureLoggingMixin, unittest.SynchronousTestCase):
+        pass
+
+    class AsynchronousFailureLogging(FailureLoggingMixin, unittest.TestCase):
+        def test_inCallback(self):
+            """
+            Log an error in an asynchronous callback.
+            """
+            return task.deferLater(reactor, 0, lambda: log.err(makeFailure()))
+
+
+class ObserverTests(unittest.SynchronousTestCase):
+    """
+    Tests for L{_synctest._LogObserver}, a helper for the implementation of
+    L{SynchronousTestCase.flushLoggedErrors}.
+    """
+
+    def setUp(self):
+        self.result = reporter.TestResult()
+        self.observer = _synctest._LogObserver()
+
+    def test_msg(self):
+        """
+        Test that a standard log message doesn't go anywhere near the result.
+        """
+        self.observer.gotEvent(
+            {
+                "message": ("some message",),
+                "time": time.time(),
+                "isError": 0,
+                "system": "-",
+            }
+        )
+        self.assertEqual(self.observer.getErrors(), [])
+
+    def test_error(self):
+        """
+        Test that an observed error gets added to the result
+        """
+        f = makeFailure()
+        self.observer.gotEvent(
+            {
+                "message": (),
+                "time": time.time(),
+                "isError": 1,
+                "system": "-",
+                "failure": f,
+                "why": None,
+            }
+        )
+        self.assertEqual(self.observer.getErrors(), [f])
+
+    def test_flush(self):
+        """
+        Check that flushing the observer with no args removes all errors.
+        """
+        self.test_error()
+        flushed = self.observer.flushErrors()
+        self.assertEqual(self.observer.getErrors(), [])
+        self.assertEqual(len(flushed), 1)
+        self.assertTrue(flushed[0].check(ZeroDivisionError))
+
+    def _makeRuntimeFailure(self):
+        return failure.Failure(RuntimeError("test error"))
+
+    def test_flushByType(self):
+        """
+        Check that flushing the observer remove all failures of the given type.
+        """
+        self.test_error()  # log a ZeroDivisionError to the observer
+        f = self._makeRuntimeFailure()
+        self.observer.gotEvent(
+            dict(
+                message=(), time=time.time(), isError=1, system="-", failure=f, why=None
+            )
+        )
+        flushed = self.observer.flushErrors(ZeroDivisionError)
+        self.assertEqual(self.observer.getErrors(), [f])
+        self.assertEqual(len(flushed), 1)
+        self.assertTrue(flushed[0].check(ZeroDivisionError))
+
+    def test_ignoreErrors(self):
+        """
+        Check that C{_ignoreErrors} actually causes errors to be ignored.
+        """
+        self.observer._ignoreErrors(ZeroDivisionError)
+        f = makeFailure()
+        self.observer.gotEvent(
+            {
+                "message": (),
+                "time": time.time(),
+                "isError": 1,
+                "system": "-",
+                "failure": f,
+                "why": None,
+            }
+        )
+        self.assertEqual(self.observer.getErrors(), [])
+
+    def test_clearIgnores(self):
+        """
+        Check that C{_clearIgnores} ensures that previously ignored errors
+        get captured.
+        """
+        self.observer._ignoreErrors(ZeroDivisionError)
+        self.observer._clearIgnores()
+        f = makeFailure()
+        self.observer.gotEvent(
+            {
+                "message": (),
+                "time": time.time(),
+                "isError": 1,
+                "system": "-",
+                "failure": f,
+                "why": None,
+            }
+        )
+        self.assertEqual(self.observer.getErrors(), [f])
+
+
+class LogErrorsMixin:
+    """
+    High-level tests demonstrating the expected behaviour of logged errors
+    during tests.
+    """
+
+    def setUp(self):
+        self.result = reporter.TestResult()
+
+    def tearDown(self):
+        self.flushLoggedErrors(ZeroDivisionError)
+
+    def test_singleError(self):
+        """
+        Test that a logged error gets reported as a test error.
+        """
+        test = self.MockTest("test_single")
+        test(self.result)
+        self.assertEqual(len(self.result.errors), 1)
+        self.assertTrue(
+            self.result.errors[0][1].check(ZeroDivisionError), self.result.errors[0][1]
+        )
+        self.assertEqual(0, self.result.successes)
+
+    def test_twoErrors(self):
+        """
+        Test that when two errors get logged, they both get reported as test
+        errors.
+        """
+        test = self.MockTest("test_double")
+        test(self.result)
+        self.assertEqual(len(self.result.errors), 2)
+        self.assertEqual(0, self.result.successes)
+
+    def test_errorsIsolated(self):
+        """
+        Check that an error logged in one test doesn't fail the next test.
+        """
+        t1 = self.MockTest("test_single")
+        t2 = self.MockTest("test_silent")
+        t1(self.result)
+        t2(self.result)
+        self.assertEqual(len(self.result.errors), 1)
+        self.assertEqual(self.result.errors[0][0], t1)
+        self.assertEqual(1, self.result.successes)
+
+    def test_errorsIsolatedWhenTestFails(self):
+        """
+        An error logged in a failed test doesn't fail the next test.
+        """
+        t1 = self.MockTest("test_singleThenFail")
+        t2 = self.MockTest("test_silent")
+        t1(self.result)
+        t2(self.result)
+
+        self.assertEqual(len(self.result.errors), 2)
+        self.assertEqual(self.result.errors[0][0], t1)
+        self.result.errors[0][1].trap(TypeError)
+
+        self.assertEqual(self.result.errors[1][0], t1)
+        self.result.errors[1][1].trap(ZeroDivisionError)
+
+        self.assertEqual(1, self.result.successes)
+
+    def test_boundedObservers(self):
+        """
+        There are no extra log observers after a test runs.
+        """
+        # XXX trial is *all about* global log state.  It should really be fixed.
+        observer = _synctest._LogObserver()
+        self.patch(_synctest, "_logObserver", observer)
+        observers = log.theLogPublisher.observers[:]
+        test = self.MockTest()
+        test(self.result)
+        self.assertEqual(observers, log.theLogPublisher.observers)
+
+
+class SynchronousLogErrorsTests(LogErrorsMixin, unittest.SynchronousTestCase):
+    MockTest = Mask.SynchronousFailureLogging
+
+
+class AsynchronousLogErrorsTests(LogErrorsMixin, unittest.TestCase):
+    MockTest = Mask.AsynchronousFailureLogging
+
+    def test_inCallback(self):
+        """
+        Test that errors logged in callbacks get reported as test errors.
+        """
+        test = self.MockTest("test_inCallback")
+        test(self.result)
+        self.assertEqual(len(self.result.errors), 1)
+        self.assertTrue(
+            self.result.errors[0][1].check(ZeroDivisionError), self.result.errors[0][1]
+        )

environment/Lib/site-packages/twisted/trial/test/test_matchers.py

@@ -0,0 +1,87 @@
+"""
+Tests for L{twisted.trial.test.matchers}.
+"""
+from hamcrest import anything, assert_that, contains_string, equal_to, not_
+from hamcrest.core.core.allof import AllOf
+from hamcrest.core.string_description import StringDescription
+from hypothesis import given
+from hypothesis.strategies import just, sampled_from, text
+
+from twisted.python.filepath import FilePath
+from twisted.trial.unittest import SynchronousTestCase
+from .matchers import fileContents
+
+
+class FileContentsTests(SynchronousTestCase):
+    """
+    Tests for L{fileContents}.
+    """
+
+    @given(text(), just("utf-8"))
+    def test_matches(self, contents: str, encoding: str) -> None:
+        """
+        L{fileContents} matches a L{IFilePath} that refers to a file that
+        contains a string that is matched by the parameterized matcher.
+
+        :param contents: The text string to place in the file and match
+            against.
+
+        :param encoding: The text encoding to use to encode C{contents} when
+            writing to the file.
+        """
+        p = FilePath(self.mktemp())
+        p.setContent(contents.encode(encoding))
+
+        description = StringDescription()
+        assert_that(
+            fileContents(equal_to(contents)).matches(p, description), equal_to(True)
+        )
+        assert_that(str(description), equal_to(""))
+
+    @given(
+        just("some text, it doesn't matter what"),
+        sampled_from(["ascii", "latin-1", "utf-8"]),
+    )
+    def test_mismatches(self, contents: str, encoding: str) -> None:
+        """
+        L{fileContents} does not match an L{IFilePath} that refers to a
+        file that contains a string that is not matched by the parameterized
+        matcher.
+
+        :param contents: The text string to place in the file and match
+            against.
+
+        :param encoding: The text encoding to use to encode C{contents} when
+            writing to the file.
+        """
+        p = FilePath(self.mktemp())
+        p.setContent(contents.encode(encoding))
+
+        description = StringDescription()
+        assert_that(
+            fileContents(not_(anything())).matches(p, description), equal_to(False)
+        )
+        assert_that(str(description), equal_to(f"was <{p}>"))
+
+    def test_ioerror(self):
+        """
+        L{fileContents} reports details of any I/O error encountered while
+        attempting to match.
+        """
+        p = FilePath(self.mktemp())
+
+        description = StringDescription()
+        assert_that(fileContents(anything()).matches(p, description), equal_to(False))
+        assert_that(
+            str(description),
+            # It must contain at least ...
+            AllOf(
+                # the name of the matcher.
+                contains_string("fileContents"),
+                # the name of the exception raised.
+                contains_string("FileNotFoundError"),
+                # the repr (so weird values are escaped) of the path being
+                # matched against.
+                contains_string(repr(p.path)),
+            ),
+        )

environment/Lib/site-packages/twisted/trial/test/test_output.py

@@ -0,0 +1,166 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Tests for the output generated by trial.
+"""
+
+
+import os
+from io import StringIO
+
+from twisted.scripts import trial
+from twisted.trial import runner
+from twisted.trial.test import packages
+
+_noModuleError = "No module named 'frotz'"
+
+
+def runTrial(*args):
+    from twisted.trial import reporter
+
+    config = trial.Options()
+    config.parseOptions(args)
+    output = StringIO()
+    myRunner = runner.TrialRunner(
+        reporter.VerboseTextReporter,
+        stream=output,
+        workingDirectory=config["temp-directory"],
+    )
+    suite = trial._getSuite(config)
+    myRunner.run(suite)
+    return output.getvalue()
+
+
+class ImportErrorsTests(packages.SysPathManglingTest):
+    """Actually run trial as if on the command line and check that the output
+    is what we expect.
+    """
+
+    def debug(self):
+        pass
+
+    parent = "_testImportErrors"
+
+    def runTrial(self, *args):
+        return runTrial("--temp-directory", self.mktemp(), *args)
+
+    def _print(self, stuff):
+        print(stuff)
+        return stuff
+
+    def assertIn(self, container, containee, *args, **kwargs):
+        # redefined to be useful in callbacks
+        super().assertIn(containee, container, *args, **kwargs)
+        return container
+
+    def assertNotIn(self, container, containee, *args, **kwargs):
+        # redefined to be useful in callbacks
+        super().assertNotIn(containee, container, *args, **kwargs)
+        return container
+
+    def test_trialRun(self):
+        self.runTrial()
+
+    def test_nonexistentModule(self):
+        d = self.runTrial("twisted.doesntexist")
+        self.assertIn(d, "[ERROR]")
+        self.assertIn(d, "twisted.doesntexist")
+        return d
+
+    def test_nonexistentPackage(self):
+        d = self.runTrial("doesntexist")
+        self.assertIn(d, "doesntexist")
+        self.assertIn(d, "ModuleNotFound")
+        self.assertIn(d, "[ERROR]")
+        return d
+
+    def test_nonexistentPackageWithModule(self):
+        d = self.runTrial("doesntexist.barney")
+        self.assertIn(d, "doesntexist.barney")
+        self.assertIn(d, "ObjectNotFound")
+        self.assertIn(d, "[ERROR]")
+        return d
+
+    def test_badpackage(self):
+        d = self.runTrial("badpackage")
+        self.assertIn(d, "[ERROR]")
+        self.assertIn(d, "badpackage")
+        self.assertNotIn(d, "IOError")
+        return d
+
+    def test_moduleInBadpackage(self):
+        d = self.runTrial("badpackage.test_module")
+        self.assertIn(d, "[ERROR]")
+        self.assertIn(d, "badpackage.test_module")
+        self.assertNotIn(d, "IOError")
+        return d
+
+    def test_badmodule(self):
+        d = self.runTrial("package.test_bad_module")
+        self.assertIn(d, "[ERROR]")
+        self.assertIn(d, "package.test_bad_module")
+        self.assertNotIn(d, "IOError")
+        self.assertNotIn(d, "<module ")
+        return d
+
+    def test_badimport(self):
+        d = self.runTrial("package.test_import_module")
+        self.assertIn(d, "[ERROR]")
+        self.assertIn(d, "package.test_import_module")
+        self.assertNotIn(d, "IOError")
+        self.assertNotIn(d, "<module ")
+        return d
+
+    def test_recurseImport(self):
+        d = self.runTrial("package")
+        self.assertIn(d, "[ERROR]")
+        self.assertIn(d, "test_bad_module")
+        self.assertIn(d, "test_import_module")
+        self.assertNotIn(d, "<module ")
+        self.assertNotIn(d, "IOError")
+        return d
+
+    def test_recurseImportErrors(self):
+        d = self.runTrial("package2")
+        self.assertIn(d, "[ERROR]")
+        self.assertIn(d, "package2")
+        self.assertIn(d, "test_module")
+        self.assertIn(d, _noModuleError)
+        self.assertNotIn(d, "<module ")
+        self.assertNotIn(d, "IOError")
+        return d
+
+    def test_nonRecurseImportErrors(self):
+        d = self.runTrial("-N", "package2")
+        self.assertIn(d, "[ERROR]")
+        self.assertIn(d, _noModuleError)
+        self.assertNotIn(d, "<module ")
+        return d
+
+    def test_regularRun(self):
+        d = self.runTrial("package.test_module")
+        self.assertNotIn(d, "[ERROR]")
+        self.assertNotIn(d, "IOError")
+        self.assertIn(d, "OK")
+        self.assertIn(d, "PASSED (successes=1)")
+        return d
+
+    def test_filename(self):
+        self.mangleSysPath(self.oldPath)
+        d = self.runTrial(os.path.join(self.parent, "package", "test_module.py"))
+        self.assertNotIn(d, "[ERROR]")
+        self.assertNotIn(d, "IOError")
+        self.assertIn(d, "OK")
+        self.assertIn(d, "PASSED (successes=1)")
+        return d
+
+    def test_dosFile(self):
+        ## XXX -- not really an output test, more of a script test
+        self.mangleSysPath(self.oldPath)
+        d = self.runTrial(os.path.join(self.parent, "package", "test_dos_module.py"))
+        self.assertNotIn(d, "[ERROR]")
+        self.assertNotIn(d, "IOError")
+        self.assertIn(d, "OK")
+        self.assertIn(d, "PASSED (successes=1)")
+        return d

environment/Lib/site-packages/twisted/trial/test/test_plugins.py

@@ -0,0 +1,46 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+#
+# Maintainer: Jonathan Lange
+
+"""
+Tests for L{twisted.plugins.twisted_trial}.
+"""
+
+from twisted.plugin import getPlugins
+from twisted.trial import unittest
+from twisted.trial.itrial import IReporter
+
+
+class PluginsTests(unittest.SynchronousTestCase):
+    """
+    Tests for Trial's reporter plugins.
+    """
+
+    def getPluginsByLongOption(self, longOption):
+        """
+        Return the Trial reporter plugin with the given long option.
+
+        If more than one is found, raise ValueError. If none are found, raise
+        IndexError.
+        """
+        plugins = [
+            plugin for plugin in getPlugins(IReporter) if plugin.longOpt == longOption
+        ]
+        if len(plugins) > 1:
+            raise ValueError(
+                "More than one plugin found with long option %r: %r"
+                % (longOption, plugins)
+            )
+        return plugins[0]
+
+    def test_subunitPlugin(self):
+        """
+        One of the reporter plugins is the subunit reporter plugin.
+        """
+        subunitPlugin = self.getPluginsByLongOption("subunit")
+        self.assertEqual("Subunit Reporter", subunitPlugin.name)
+        self.assertEqual("twisted.trial.reporter", subunitPlugin.module)
+        self.assertEqual("subunit", subunitPlugin.longOpt)
+        self.assertIdentical(None, subunitPlugin.shortOpt)
+        self.assertEqual("SubunitReporter", subunitPlugin.klass)

environment/Lib/site-packages/twisted/trial/test/test_pyunitcompat.py

@@ -0,0 +1,255 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+
+import sys
+import traceback
+import unittest as pyunit
+from unittest import skipIf
+
+from zope.interface import implementer
+
+from twisted.python.failure import Failure
+from twisted.trial.itrial import IReporter, ITestCase
+from twisted.trial.test import pyunitcases
+from twisted.trial.unittest import PyUnitResultAdapter, SynchronousTestCase
+
+
+class PyUnitTestTests(SynchronousTestCase):
+    def setUp(self):
+        self.original = pyunitcases.PyUnitTest("test_pass")
+        self.test = ITestCase(self.original)
+
+    def test_callable(self):
+        """
+        Tests must be callable in order to be used with Python's unittest.py.
+        """
+        self.assertTrue(callable(self.test), f"{self.test!r} is not callable.")
+
+
+class PyUnitResultTests(SynchronousTestCase):
+    """
+    Tests to show that PyUnitResultAdapter wraps TestResult objects from the
+    standard library 'unittest' module in such a way as to make them usable and
+    useful from Trial.
+    """
+
+    # Once erroneous is ported to Python 3 this can be replaced with
+    # erroneous.ErrorTest:
+    class ErrorTest(SynchronousTestCase):
+        """
+        A test case which has a L{test_foo} which will raise an error.
+
+        @ivar ran: boolean indicating whether L{test_foo} has been run.
+        """
+
+        ran = False
+
+        def test_foo(self):
+            """
+            Set C{self.ran} to True and raise a C{ZeroDivisionError}
+            """
+            self.ran = True
+            1 / 0
+
+    def test_dontUseAdapterWhenReporterProvidesIReporter(self):
+        """
+        The L{PyUnitResultAdapter} is only used when the result passed to
+        C{run} does *not* provide L{IReporter}.
+        """
+
+        @implementer(IReporter)
+        class StubReporter:
+            """
+            A reporter which records data about calls made to it.
+
+            @ivar errors: Errors passed to L{addError}.
+            @ivar failures: Failures passed to L{addFailure}.
+            """
+
+            def __init__(self):
+                self.errors = []
+                self.failures = []
+
+            def startTest(self, test):
+                """
+                Do nothing.
+                """
+
+            def stopTest(self, test):
+                """
+                Do nothing.
+                """
+
+            def addError(self, test, error):
+                """
+                Record the error.
+                """
+                self.errors.append(error)
+
+        test = self.ErrorTest("test_foo")
+        result = StubReporter()
+        test.run(result)
+        self.assertIsInstance(result.errors[0], Failure)
+
+    def test_success(self):
+        class SuccessTest(SynchronousTestCase):
+            ran = False
+
+            def test_foo(s):
+                s.ran = True
+
+        test = SuccessTest("test_foo")
+        result = pyunit.TestResult()
+        test.run(result)
+
+        self.assertTrue(test.ran)
+        self.assertEqual(1, result.testsRun)
+        self.assertTrue(result.wasSuccessful())
+
+    def test_failure(self):
+        class FailureTest(SynchronousTestCase):
+            ran = False
+
+            def test_foo(s):
+                s.ran = True
+                s.fail("boom!")
+
+        test = FailureTest("test_foo")
+        result = pyunit.TestResult()
+        test.run(result)
+
+        self.assertTrue(test.ran)
+        self.assertEqual(1, result.testsRun)
+        self.assertEqual(1, len(result.failures))
+        self.assertFalse(result.wasSuccessful())
+
+    def test_error(self):
+        test = self.ErrorTest("test_foo")
+        result = pyunit.TestResult()
+        test.run(result)
+
+        self.assertTrue(test.ran)
+        self.assertEqual(1, result.testsRun)
+        self.assertEqual(1, len(result.errors))
+        self.assertFalse(result.wasSuccessful())
+
+    def test_setUpError(self):
+        class ErrorTest(SynchronousTestCase):
+            ran = False
+
+            def setUp(self):
+                1 / 0
+
+            def test_foo(s):
+                s.ran = True
+
+        test = ErrorTest("test_foo")
+        result = pyunit.TestResult()
+        test.run(result)
+
+        self.assertFalse(test.ran)
+        self.assertEqual(1, result.testsRun)
+        self.assertEqual(1, len(result.errors))
+        self.assertFalse(result.wasSuccessful())
+
+    def test_tracebackFromFailure(self):
+        """
+        Errors added through the L{PyUnitResultAdapter} have the same traceback
+        information as if there were no adapter at all.
+        """
+        try:
+            1 / 0
+        except ZeroDivisionError:
+            exc_info = sys.exc_info()
+            f = Failure()
+        pyresult = pyunit.TestResult()
+        result = PyUnitResultAdapter(pyresult)
+        result.addError(self, f)
+        self.assertEqual(
+            pyresult.errors[0][1], "".join(traceback.format_exception(*exc_info))
+        )
+
+    def test_traceback(self):
+        """
+        As test_tracebackFromFailure, but covering more code.
+        """
+
+        class ErrorTest(SynchronousTestCase):
+            exc_info = None
+
+            def test_foo(self):
+                try:
+                    1 / 0
+                except ZeroDivisionError:
+                    self.exc_info = sys.exc_info()
+                    raise
+
+        test = ErrorTest("test_foo")
+        result = pyunit.TestResult()
+        test.run(result)
+
+        # We can't test that the tracebacks are equal, because Trial's
+        # machinery inserts a few extra frames on the top and we don't really
+        # want to trim them off without an extremely good reason.
+        #
+        # So, we just test that the result's stack ends with the
+        # exception's stack.
+
+        expected_stack = "".join(traceback.format_tb(test.exc_info[2]))
+        observed_stack = "\n".join(result.errors[0][1].splitlines()[:-1])
+
+        self.assertEqual(
+            expected_stack.strip(), observed_stack[-len(expected_stack) :].strip()
+        )
+
+    def test_tracebackFromCleanFailure(self):
+        """
+        Errors added through the L{PyUnitResultAdapter} have the same
+        traceback information as if there were no adapter at all, even
+        if the Failure that held the information has been cleaned.
+        """
+        try:
+            1 / 0
+        except ZeroDivisionError:
+            exc_info = sys.exc_info()
+            f = Failure()
+        f.cleanFailure()
+        pyresult = pyunit.TestResult()
+        result = PyUnitResultAdapter(pyresult)
+        result.addError(self, f)
+        self.assertEqual(
+            pyresult.errors[0][1], "".join(traceback.format_exception(*exc_info))
+        )
+
+    def test_trialSkip(self):
+        """
+        Skips using trial's skipping functionality are reported as skips in
+        the L{pyunit.TestResult}.
+        """
+
+        class SkipTest(SynchronousTestCase):
+            @skipIf(True, "Let's skip!")
+            def test_skip(self):
+                1 / 0
+
+        test = SkipTest("test_skip")
+        result = pyunit.TestResult()
+        test.run(result)
+        self.assertEqual(result.skipped, [(test, "Let's skip!")])
+
+    def test_pyunitSkip(self):
+        """
+        Skips using pyunit's skipping functionality are reported as skips in
+        the L{pyunit.TestResult}.
+        """
+
+        class SkipTest(SynchronousTestCase):
+            @pyunit.skip("skippy")
+            def test_skip(self):
+                1 / 0
+
+        test = SkipTest("test_skip")
+        result = pyunit.TestResult()
+        test.run(result)
+        self.assertEqual(result.skipped, [(test, "skippy")])

environment/Lib/site-packages/twisted/trial/test/test_script.py

@@ -0,0 +1,955 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+
+import gc
+import re
+import sys
+import textwrap
+import types
+from io import StringIO
+from typing import List
+
+from hamcrest import assert_that, contains_string
+from hypothesis import given
+from hypothesis.strategies import sampled_from
+
+from twisted.logger import Logger
+from twisted.python import util
+from twisted.python.filepath import FilePath
+from twisted.python.usage import UsageError
+from twisted.scripts import trial
+from twisted.trial import unittest
+from twisted.trial._dist.disttrial import DistTrialRunner
+from twisted.trial._dist.functional import compose
+from twisted.trial.runner import (
+    DestructiveTestSuite,
+    TestLoader,
+    TestSuite,
+    TrialRunner,
+)
+from twisted.trial.test.test_loader import testNames
+from .matchers import fileContents
+
+pyunit = __import__("unittest")
+
+
+def sibpath(filename):
+    """
+    For finding files in twisted/trial/test
+    """
+    return util.sibpath(__file__, filename)
+
+
+def logSomething() -> None:
+    """
+    Emit something to L{twisted.logger}.
+    """
+    Logger().info("something")
+
+
+def parseArguments(argv: List[str]) -> trial.Options:
+    """
+    Parse an argument list using trial's argument parser.
+    """
+    config = trial.Options()
+    config.parseOptions(argv)
+    return config
+
+
+def runFromConfig(config: trial.Options) -> trial.Options:
+    """
+    Run L{logSomething} as a test method using the given configuration.
+    """
+    runner = trial._makeRunner(config)
+    runner.stream = StringIO()
+    suite = TestSuite([pyunit.FunctionTestCase(logSomething)])
+    runner.run(suite)
+    return config
+
+
+runFromArguments = compose(runFromConfig, parseArguments)
+
+
+class LogfileTests(unittest.SynchronousTestCase):
+    """
+    Tests for the --logfile option.
+    """
+
+    @given(
+        sampled_from(
+            [
+                "dir-a",
+                "dir-b",
+                "dir-c/dir-d",
+            ]
+        )
+    )
+    def test_default(self, workingDirectory: str) -> None:
+        """
+        If no value is given for the option then logs are written to a log
+        file constructed from a default value.
+        """
+        config = runFromArguments(["--temp-directory", workingDirectory])
+        logPath = FilePath(workingDirectory).preauthChild(config["logfile"])
+        assert_that(logPath, fileContents(contains_string("something")))
+
+    @given(
+        sampled_from(
+            [
+                "somelog.txt",
+                "somedir/somelog.txt",
+            ]
+        )
+    )
+    def test_relativePath(self, logfile: str) -> None:
+        """
+        If the value given for the option is a relative path then it is
+        interpreted relative to trial's own temporary working directory and
+        logs are written there.
+        """
+        config = runFromArguments(["--logfile", logfile])
+        logPath = FilePath(config["temp-directory"]).preauthChild(logfile)
+        assert_that(logPath, fileContents(contains_string("something")))
+
+    @given(
+        sampled_from(
+            [
+                "somelog.txt",
+                "somedir/somelog.txt",
+            ]
+        )
+    )
+    def test_absolutePath(self, logfile: str) -> None:
+        """
+        If the value given for the option is an absolute path then it is
+        interpreted absolutely and logs are written there.
+        """
+        # We don't want to scribble to arbitrary places on the host
+        # filesystem.  Construct an absolute path that's beneath our working
+        # directory - which trial will make into a per-run unique temporary
+        # directory.
+        logPath = FilePath(".").preauthChild(logfile)
+        runFromArguments(["--logfile", logPath.path])
+        assert_that(logPath, fileContents(contains_string("something")))
+
+
+class ForceGarbageCollectionTests(unittest.SynchronousTestCase):
+    """
+    Tests for the --force-gc option.
+    """
+
+    def setUp(self):
+        self.config = trial.Options()
+        self.log = []
+        self.patch(gc, "collect", self.collect)
+        test = pyunit.FunctionTestCase(self.simpleTest)
+        self.test = TestSuite([test, test])
+
+    def simpleTest(self):
+        """
+        A simple test method that records that it was run.
+        """
+        self.log.append("test")
+
+    def collect(self):
+        """
+        A replacement for gc.collect that logs calls to itself.
+        """
+        self.log.append("collect")
+
+    def makeRunner(self):
+        """
+        Return a L{TrialRunner} object that is safe to use in tests.
+        """
+        runner = trial._makeRunner(self.config)
+        runner.stream = StringIO()
+        return runner
+
+    def test_forceGc(self):
+        """
+        Passing the --force-gc option to the trial script forces the garbage
+        collector to run before and after each test.
+        """
+        self.config["force-gc"] = True
+        self.config.postOptions()
+        runner = self.makeRunner()
+        runner.run(self.test)
+        self.assertEqual(
+            self.log, ["collect", "test", "collect", "collect", "test", "collect"]
+        )
+
+    def test_unforceGc(self):
+        """
+        By default, no garbage collection is forced.
+        """
+        self.config.postOptions()
+        runner = self.makeRunner()
+        runner.run(self.test)
+        self.assertEqual(self.log, ["test", "test"])
+
+
+class SuiteUsedTests(unittest.SynchronousTestCase):
+    """
+    Check the category of tests suite used by the loader.
+    """
+
+    def setUp(self):
+        """
+        Create a trial configuration object.
+        """
+        self.config = trial.Options()
+
+    def test_defaultSuite(self):
+        """
+        By default, the loader should use L{DestructiveTestSuite}
+        """
+        loader = trial._getLoader(self.config)
+        self.assertEqual(loader.suiteFactory, DestructiveTestSuite)
+
+    def test_untilFailureSuite(self):
+        """
+        The C{until-failure} configuration uses the L{TestSuite} to keep
+        instances alive across runs.
+        """
+        self.config["until-failure"] = True
+        loader = trial._getLoader(self.config)
+        self.assertEqual(loader.suiteFactory, TestSuite)
+
+
+class TestModuleTests(unittest.SynchronousTestCase):
+    def setUp(self):
+        self.config = trial.Options()
+
+    def tearDown(self):
+        self.config = None
+
+    def test_testNames(self):
+        """
+        Check that the testNames helper method accurately collects the
+        names of tests in suite.
+        """
+        self.assertEqual(testNames(self), [self.id()])
+
+    def assertSuitesEqual(self, test1, names):
+        loader = TestLoader()
+        names1 = testNames(test1)
+        names2 = testNames(TestSuite(map(loader.loadByName, names)))
+        names1.sort()
+        names2.sort()
+        self.assertEqual(names1, names2)
+
+    def test_baseState(self):
+        self.assertEqual(0, len(self.config["tests"]))
+
+    def test_testmoduleOnModule(self):
+        """
+        Check that --testmodule loads a suite which contains the tests
+        referred to in test-case-name inside its parameter.
+        """
+        self.config.opt_testmodule(sibpath("moduletest.py"))
+        self.assertSuitesEqual(
+            trial._getSuite(self.config), ["twisted.trial.test.test_log"]
+        )
+
+    def test_testmoduleTwice(self):
+        """
+        When the same module is specified with two --testmodule flags, it
+        should only appear once in the suite.
+        """
+        self.config.opt_testmodule(sibpath("moduletest.py"))
+        self.config.opt_testmodule(sibpath("moduletest.py"))
+        self.assertSuitesEqual(
+            trial._getSuite(self.config), ["twisted.trial.test.test_log"]
+        )
+
+    def test_testmoduleOnSourceAndTarget(self):
+        """
+        If --testmodule is specified twice, once for module A and once for
+        a module which refers to module A, then make sure module A is only
+        added once.
+        """
+        self.config.opt_testmodule(sibpath("moduletest.py"))
+        self.config.opt_testmodule(sibpath("test_log.py"))
+        self.assertSuitesEqual(
+            trial._getSuite(self.config), ["twisted.trial.test.test_log"]
+        )
+
+    def test_testmoduleOnSelfModule(self):
+        """
+        When given a module that refers to *itself* in the test-case-name
+        variable, check that --testmodule only adds the tests once.
+        """
+        self.config.opt_testmodule(sibpath("moduleself.py"))
+        self.assertSuitesEqual(
+            trial._getSuite(self.config), ["twisted.trial.test.moduleself"]
+        )
+
+    def test_testmoduleOnScript(self):
+        """
+        Check that --testmodule loads tests referred to in test-case-name
+        buffer variables.
+        """
+        self.config.opt_testmodule(sibpath("scripttest.py"))
+        self.assertSuitesEqual(
+            trial._getSuite(self.config),
+            ["twisted.trial.test.test_log", "twisted.trial.test.test_runner"],
+        )
+
+    def test_testmoduleOnNonexistentFile(self):
+        """
+        Check that --testmodule displays a meaningful error message when
+        passed a non-existent filename.
+        """
+        buffy = StringIO()
+        stderr, sys.stderr = sys.stderr, buffy
+        filename = "test_thisbetternoteverexist.py"
+        try:
+            self.config.opt_testmodule(filename)
+            self.assertEqual(0, len(self.config["tests"]))
+            self.assertEqual(f"File {filename!r} doesn't exist\n", buffy.getvalue())
+        finally:
+            sys.stderr = stderr
+
+    def test_testmoduleOnEmptyVars(self):
+        """
+        Check that --testmodule adds no tests to the suite for modules
+        which lack test-case-name buffer variables.
+        """
+        self.config.opt_testmodule(sibpath("novars.py"))
+        self.assertEqual(0, len(self.config["tests"]))
+
+    def test_testmoduleOnModuleName(self):
+        """
+        Check that --testmodule does *not* support module names as arguments
+        and that it displays a meaningful error message.
+        """
+        buffy = StringIO()
+        stderr, sys.stderr = sys.stderr, buffy
+        moduleName = "twisted.trial.test.test_script"
+        try:
+            self.config.opt_testmodule(moduleName)
+            self.assertEqual(0, len(self.config["tests"]))
+            self.assertEqual(f"File {moduleName!r} doesn't exist\n", buffy.getvalue())
+        finally:
+            sys.stderr = stderr
+
+    def test_parseLocalVariable(self):
+        declaration = "-*- test-case-name: twisted.trial.test.test_tests -*-"
+        localVars = trial._parseLocalVariables(declaration)
+        self.assertEqual({"test-case-name": "twisted.trial.test.test_tests"}, localVars)
+
+    def test_trailingSemicolon(self):
+        declaration = "-*- test-case-name: twisted.trial.test.test_tests; -*-"
+        localVars = trial._parseLocalVariables(declaration)
+        self.assertEqual({"test-case-name": "twisted.trial.test.test_tests"}, localVars)
+
+    def test_parseLocalVariables(self):
+        declaration = (
+            "-*- test-case-name: twisted.trial.test.test_tests; " "foo: bar -*-"
+        )
+        localVars = trial._parseLocalVariables(declaration)
+        self.assertEqual(
+            {"test-case-name": "twisted.trial.test.test_tests", "foo": "bar"}, localVars
+        )
+
+    def test_surroundingGuff(self):
+        declaration = "## -*- test-case-name: " "twisted.trial.test.test_tests -*- #"
+        localVars = trial._parseLocalVariables(declaration)
+        self.assertEqual({"test-case-name": "twisted.trial.test.test_tests"}, localVars)
+
+    def test_invalidLine(self):
+        self.assertRaises(ValueError, trial._parseLocalVariables, "foo")
+
+    def test_invalidDeclaration(self):
+        self.assertRaises(ValueError, trial._parseLocalVariables, "-*- foo -*-")
+        self.assertRaises(
+            ValueError, trial._parseLocalVariables, "-*- foo: bar; qux -*-"
+        )
+        self.assertRaises(
+            ValueError, trial._parseLocalVariables, "-*- foo: bar: baz; qux: qax -*-"
+        )
+
+    def test_variablesFromFile(self):
+        localVars = trial.loadLocalVariables(sibpath("moduletest.py"))
+        self.assertEqual({"test-case-name": "twisted.trial.test.test_log"}, localVars)
+
+    def test_noVariablesInFile(self):
+        localVars = trial.loadLocalVariables(sibpath("novars.py"))
+        self.assertEqual({}, localVars)
+
+    def test_variablesFromScript(self):
+        localVars = trial.loadLocalVariables(sibpath("scripttest.py"))
+        self.assertEqual(
+            {
+                "test-case-name": (
+                    "twisted.trial.test.test_log," "twisted.trial.test.test_runner"
+                )
+            },
+            localVars,
+        )
+
+    def test_getTestModules(self):
+        modules = trial.getTestModules(sibpath("moduletest.py"))
+        self.assertEqual(modules, ["twisted.trial.test.test_log"])
+
+    def test_getTestModules_noVars(self):
+        modules = trial.getTestModules(sibpath("novars.py"))
+        self.assertEqual(len(modules), 0)
+
+    def test_getTestModules_multiple(self):
+        modules = trial.getTestModules(sibpath("scripttest.py"))
+        self.assertEqual(
+            set(modules),
+            {"twisted.trial.test.test_log", "twisted.trial.test.test_runner"},
+        )
+
+    def test_looksLikeTestModule(self):
+        for filename in ["test_script.py", "twisted/trial/test/test_script.py"]:
+            self.assertTrue(
+                trial.isTestFile(filename),
+                f"{filename!r} should be a test file",
+            )
+        for filename in [
+            "twisted/trial/test/moduletest.py",
+            sibpath("scripttest.py"),
+            sibpath("test_foo.bat"),
+        ]:
+            self.assertFalse(
+                trial.isTestFile(filename),
+                f"{filename!r} should *not* be a test file",
+            )
+
+
+class WithoutModuleTests(unittest.SynchronousTestCase):
+    """
+    Test the C{without-module} flag.
+    """
+
+    def setUp(self):
+        """
+        Create a L{trial.Options} object to be used in the tests, and save
+        C{sys.modules}.
+        """
+        self.config = trial.Options()
+        self.savedModules = dict(sys.modules)
+
+    def tearDown(self):
+        """
+        Restore C{sys.modules}.
+        """
+        for module in ("imaplib", "smtplib"):
+            if module in self.savedModules:
+                sys.modules[module] = self.savedModules[module]
+            else:
+                sys.modules.pop(module, None)
+
+    def _checkSMTP(self):
+        """
+        Try to import the C{smtplib} module, and return it.
+        """
+        import smtplib
+
+        return smtplib
+
+    def _checkIMAP(self):
+        """
+        Try to import the C{imaplib} module, and return it.
+        """
+        import imaplib
+
+        return imaplib
+
+    def test_disableOneModule(self):
+        """
+        Check that after disabling a module, it can't be imported anymore.
+        """
+        self.config.parseOptions(["--without-module", "smtplib"])
+        self.assertRaises(ImportError, self._checkSMTP)
+        # Restore sys.modules
+        del sys.modules["smtplib"]
+        # Then the function should succeed
+        self.assertIsInstance(self._checkSMTP(), types.ModuleType)
+
+    def test_disableMultipleModules(self):
+        """
+        Check that several modules can be disabled at once.
+        """
+        self.config.parseOptions(["--without-module", "smtplib,imaplib"])
+        self.assertRaises(ImportError, self._checkSMTP)
+        self.assertRaises(ImportError, self._checkIMAP)
+        # Restore sys.modules
+        del sys.modules["smtplib"]
+        del sys.modules["imaplib"]
+        # Then the functions should succeed
+        self.assertIsInstance(self._checkSMTP(), types.ModuleType)
+        self.assertIsInstance(self._checkIMAP(), types.ModuleType)
+
+    def test_disableAlreadyImportedModule(self):
+        """
+        Disabling an already imported module should produce a warning.
+        """
+        self.assertIsInstance(self._checkSMTP(), types.ModuleType)
+        self.assertWarns(
+            RuntimeWarning,
+            "Module 'smtplib' already imported, disabling anyway.",
+            trial.__file__,
+            self.config.parseOptions,
+            ["--without-module", "smtplib"],
+        )
+        self.assertRaises(ImportError, self._checkSMTP)
+
+
+class CoverageTests(unittest.SynchronousTestCase):
+    """
+    Tests for the I{coverage} option.
+    """
+
+    if getattr(sys, "gettrace", None) is None:
+        skip = "Cannot test trace hook installation without inspection API."
+
+    def setUp(self):
+        """
+        Arrange for the current trace hook to be restored when the
+        test is complete.
+        """
+        self.addCleanup(sys.settrace, sys.gettrace())
+
+    def test_tracerInstalled(self):
+        """
+        L{trial.Options} handles C{"--coverage"} by installing a trace
+        hook to record coverage information.
+        """
+        options = trial.Options()
+        options.parseOptions(["--coverage"])
+        self.assertEqual(sys.gettrace(), options.tracer.globaltrace)
+
+    def test_coverdirDefault(self):
+        """
+        L{trial.Options.coverdir} returns a L{FilePath} based on the default
+        for the I{temp-directory} option if that option is not specified.
+        """
+        options = trial.Options()
+        self.assertEqual(
+            options.coverdir(),
+            FilePath(".").descendant([options["temp-directory"], "coverage"]),
+        )
+
+    def test_coverdirOverridden(self):
+        """
+        If a value is specified for the I{temp-directory} option,
+        L{trial.Options.coverdir} returns a child of that path.
+        """
+        path = self.mktemp()
+        options = trial.Options()
+        options.parseOptions(["--temp-directory", path])
+        self.assertEqual(options.coverdir(), FilePath(path).child("coverage"))
+
+
+class OptionsTests(unittest.TestCase):
+    """
+    Tests for L{trial.Options}.
+    """
+
+    def setUp(self):
+        """
+        Build an L{Options} object to be used in the tests.
+        """
+        self.options = trial.Options()
+
+    def test_getWorkerArguments(self):
+        """
+        C{_getWorkerArguments} discards options like C{random} as they only
+        matter in the manager, and forwards options like C{recursionlimit} or
+        C{disablegc}.
+        """
+        self.addCleanup(sys.setrecursionlimit, sys.getrecursionlimit())
+        if gc.isenabled():
+            self.addCleanup(gc.enable)
+
+        self.options.parseOptions(
+            ["--recursionlimit", "2000", "--random", "4", "--disablegc"]
+        )
+        args = self.options._getWorkerArguments()
+        self.assertIn("--disablegc", args)
+        args.remove("--disablegc")
+        self.assertEqual(["--recursionlimit", "2000"], args)
+
+    def test_jobsConflictWithDebug(self):
+        """
+        C{parseOptions} raises a C{UsageError} when C{--debug} is passed along
+        C{--jobs} as it's not supported yet.
+
+        @see: U{http://twistedmatrix.com/trac/ticket/5825}
+        """
+        error = self.assertRaises(
+            UsageError, self.options.parseOptions, ["--jobs", "4", "--debug"]
+        )
+        self.assertEqual("You can't specify --debug when using --jobs", str(error))
+
+    def test_jobsConflictWithProfile(self):
+        """
+        C{parseOptions} raises a C{UsageError} when C{--profile} is passed
+        along C{--jobs} as it's not supported yet.
+
+        @see: U{http://twistedmatrix.com/trac/ticket/5827}
+        """
+        error = self.assertRaises(
+            UsageError, self.options.parseOptions, ["--jobs", "4", "--profile"]
+        )
+        self.assertEqual("You can't specify --profile when using --jobs", str(error))
+
+    def test_jobsConflictWithDebugStackTraces(self):
+        """
+        C{parseOptions} raises a C{UsageError} when C{--debug-stacktraces} is
+        passed along C{--jobs} as it's not supported yet.
+
+        @see: U{http://twistedmatrix.com/trac/ticket/5826}
+        """
+        error = self.assertRaises(
+            UsageError,
+            self.options.parseOptions,
+            ["--jobs", "4", "--debug-stacktraces"],
+        )
+        self.assertEqual(
+            "You can't specify --debug-stacktraces when using --jobs", str(error)
+        )
+
+    def test_orderConflictWithRandom(self):
+        """
+        C{parseOptions} raises a C{UsageError} when C{--order} is passed along
+        with C{--random}.
+        """
+        error = self.assertRaises(
+            UsageError,
+            self.options.parseOptions,
+            ["--order", "alphabetical", "--random", "1234"],
+        )
+        self.assertEqual("You can't specify --random when using --order", str(error))
+
+
+class MakeRunnerTests(unittest.TestCase):
+    """
+    Tests for the L{_makeRunner} helper.
+    """
+
+    def setUp(self):
+        self.options = trial.Options()
+
+    def test_jobs(self):
+        """
+        L{_makeRunner} returns a L{DistTrialRunner} instance when the C{--jobs}
+        option is passed.  The L{DistTrialRunner} knows how many workers to
+        run and the C{workerArguments} to pass to them.
+        """
+        self.options.parseOptions(["--jobs", "4", "--force-gc"])
+        runner = trial._makeRunner(self.options)
+        self.assertIsInstance(runner, DistTrialRunner)
+        self.assertEqual(4, runner._maxWorkers)
+        self.assertEqual(["--force-gc"], runner._workerArguments)
+
+    def test_dryRunWithJobs(self):
+        """
+        L{_makeRunner} returns a L{TrialRunner} instance in C{DRY_RUN} mode
+        when the C{--dry-run} option is passed, even if C{--jobs} is set.
+        """
+        self.options.parseOptions(["--jobs", "4", "--dry-run"])
+        runner = trial._makeRunner(self.options)
+        self.assertIsInstance(runner, TrialRunner)
+        self.assertEqual(TrialRunner.DRY_RUN, runner.mode)
+
+    def test_DebuggerNotFound(self):
+        namedAny = trial.reflect.namedAny
+
+        def namedAnyExceptdoNotFind(fqn):
+            if fqn == "doNotFind":
+                raise trial.reflect.ModuleNotFound(fqn)
+            return namedAny(fqn)
+
+        self.patch(trial.reflect, "namedAny", namedAnyExceptdoNotFind)
+
+        options = trial.Options()
+        options.parseOptions(["--debug", "--debugger", "doNotFind"])
+
+        self.assertRaises(trial._DebuggerNotFound, trial._makeRunner, options)
+
+    def test_exitfirst(self):
+        """
+        Passing C{--exitfirst} wraps the reporter with a
+        L{reporter._ExitWrapper} that stops on any non-success.
+        """
+        self.options.parseOptions(["--exitfirst"])
+        runner = trial._makeRunner(self.options)
+        self.assertTrue(runner._exitFirst)
+
+
+class RunTests(unittest.TestCase):
+    """
+    Tests for the L{run} function.
+    """
+
+    def setUp(self):
+        # don't re-parse cmdline options, because if --reactor was passed to
+        # the test run trial will try to restart the (already running) reactor
+        self.patch(trial.Options, "parseOptions", lambda self: None)
+
+    def test_debuggerNotFound(self):
+        """
+        When a debugger is not found, an error message is printed to the user.
+
+        """
+
+        def _makeRunner(*args, **kwargs):
+            raise trial._DebuggerNotFound("foo")
+
+        self.patch(trial, "_makeRunner", _makeRunner)
+
+        try:
+            trial.run()
+        except SystemExit as e:
+            self.assertIn("foo", str(e))
+        else:
+            self.fail("Should have exited due to non-existent debugger!")
+
+
+class TestArgumentOrderTests(unittest.TestCase):
+    """
+    Tests for the order-preserving behavior on provided command-line tests.
+    """
+
+    def setUp(self):
+        self.config = trial.Options()
+        self.loader = TestLoader()
+
+    def test_preserveArgumentOrder(self):
+        """
+        Multiple tests passed on the command line are not reordered.
+        """
+        tests = [
+            "twisted.trial.test.test_tests",
+            "twisted.trial.test.test_assertions",
+            "twisted.trial.test.test_deferred",
+        ]
+        self.config.parseOptions(tests)
+
+        suite = trial._getSuite(self.config)
+        names = testNames(suite)
+
+        expectedSuite = TestSuite(map(self.loader.loadByName, tests))
+        expectedNames = testNames(expectedSuite)
+
+        self.assertEqual(names, expectedNames)
+
+
+class OrderTests(unittest.TestCase):
+    """
+    Tests for the --order option.
+    """
+
+    def setUp(self):
+        self.config = trial.Options()
+
+    def test_alphabetical(self):
+        """
+        --order=alphabetical causes trial to run tests alphabetically within
+        each test case.
+        """
+        self.config.parseOptions(
+            ["--order", "alphabetical", "twisted.trial.test.ordertests.FooTest"]
+        )
+
+        loader = trial._getLoader(self.config)
+        suite = loader.loadByNames(self.config["tests"])
+
+        self.assertEqual(
+            testNames(suite),
+            [
+                "twisted.trial.test.ordertests.FooTest.test_first",
+                "twisted.trial.test.ordertests.FooTest.test_fourth",
+                "twisted.trial.test.ordertests.FooTest.test_second",
+                "twisted.trial.test.ordertests.FooTest.test_third",
+            ],
+        )
+
+    def test_alphabeticalModule(self):
+        """
+        --order=alphabetical causes trial to run test classes within a given
+        module alphabetically.
+        """
+        self.config.parseOptions(
+            ["--order", "alphabetical", "twisted.trial.test.ordertests"]
+        )
+        loader = trial._getLoader(self.config)
+        suite = loader.loadByNames(self.config["tests"])
+
+        self.assertEqual(
+            testNames(suite),
+            [
+                "twisted.trial.test.ordertests.BarTest.test_bar",
+                "twisted.trial.test.ordertests.BazTest.test_baz",
+                "twisted.trial.test.ordertests.FooTest.test_first",
+                "twisted.trial.test.ordertests.FooTest.test_fourth",
+                "twisted.trial.test.ordertests.FooTest.test_second",
+                "twisted.trial.test.ordertests.FooTest.test_third",
+            ],
+        )
+
+    def test_alphabeticalPackage(self):
+        """
+        --order=alphabetical causes trial to run test modules within a given
+        package alphabetically, with tests within each module alphabetized.
+        """
+        self.config.parseOptions(["--order", "alphabetical", "twisted.trial.test"])
+        loader = trial._getLoader(self.config)
+        suite = loader.loadByNames(self.config["tests"])
+
+        names = testNames(suite)
+        self.assertTrue(names, msg="Failed to load any tests!")
+        self.assertEqual(names, sorted(names))
+
+    def test_toptobottom(self):
+        """
+        --order=toptobottom causes trial to run test methods within a given
+        test case from top to bottom as they are defined in the body of the
+        class.
+        """
+        self.config.parseOptions(
+            ["--order", "toptobottom", "twisted.trial.test.ordertests.FooTest"]
+        )
+
+        loader = trial._getLoader(self.config)
+        suite = loader.loadByNames(self.config["tests"])
+
+        self.assertEqual(
+            testNames(suite),
+            [
+                "twisted.trial.test.ordertests.FooTest.test_first",
+                "twisted.trial.test.ordertests.FooTest.test_second",
+                "twisted.trial.test.ordertests.FooTest.test_third",
+                "twisted.trial.test.ordertests.FooTest.test_fourth",
+            ],
+        )
+
+    def test_toptobottomModule(self):
+        """
+        --order=toptobottom causes trial to run test classes within a given
+        module from top to bottom as they are defined in the module's source.
+        """
+        self.config.parseOptions(
+            ["--order", "toptobottom", "twisted.trial.test.ordertests"]
+        )
+        loader = trial._getLoader(self.config)
+        suite = loader.loadByNames(self.config["tests"])
+
+        self.assertEqual(
+            testNames(suite),
+            [
+                "twisted.trial.test.ordertests.FooTest.test_first",
+                "twisted.trial.test.ordertests.FooTest.test_second",
+                "twisted.trial.test.ordertests.FooTest.test_third",
+                "twisted.trial.test.ordertests.FooTest.test_fourth",
+                "twisted.trial.test.ordertests.BazTest.test_baz",
+                "twisted.trial.test.ordertests.BarTest.test_bar",
+            ],
+        )
+
+    def test_toptobottomPackage(self):
+        """
+        --order=toptobottom causes trial to run test modules within a given
+        package alphabetically, with tests within each module run top to
+        bottom.
+        """
+        self.config.parseOptions(["--order", "toptobottom", "twisted.trial.test"])
+        loader = trial._getLoader(self.config)
+        suite = loader.loadByNames(self.config["tests"])
+
+        names = testNames(suite)
+        # twisted.trial.test.test_module, so split and key on the first 4 to
+        # get stable alphabetical sort on those
+        self.assertEqual(
+            names,
+            sorted(names, key=lambda name: name.split(".")[:4]),
+        )
+
+    def test_toptobottomMissingSource(self):
+        """
+        --order=toptobottom detects the source line of methods from modules
+        whose source file is missing.
+        """
+        tempdir = self.mktemp()
+        package = FilePath(tempdir).child("twisted_toptobottom_temp")
+        package.makedirs()
+        package.child("__init__.py").setContent(b"")
+        package.child("test_missing.py").setContent(
+            textwrap.dedent(
+                """
+        from twisted.trial.unittest import TestCase
+        class TestMissing(TestCase):
+            def test_second(self): pass
+            def test_third(self): pass
+            def test_fourth(self): pass
+            def test_first(self): pass
+        """
+            ).encode("utf8")
+        )
+        pathEntry = package.parent().path
+        sys.path.insert(0, pathEntry)
+        self.addCleanup(sys.path.remove, pathEntry)
+        from twisted_toptobottom_temp import test_missing  # type: ignore[import]
+
+        self.addCleanup(sys.modules.pop, "twisted_toptobottom_temp")
+        self.addCleanup(sys.modules.pop, test_missing.__name__)
+        package.child("test_missing.py").remove()
+
+        self.config.parseOptions(
+            ["--order", "toptobottom", "twisted.trial.test.ordertests"]
+        )
+        loader = trial._getLoader(self.config)
+        suite = loader.loadModule(test_missing)
+
+        self.assertEqual(
+            testNames(suite),
+            [
+                "twisted_toptobottom_temp.test_missing.TestMissing.test_second",
+                "twisted_toptobottom_temp.test_missing.TestMissing.test_third",
+                "twisted_toptobottom_temp.test_missing.TestMissing.test_fourth",
+                "twisted_toptobottom_temp.test_missing.TestMissing.test_first",
+            ],
+        )
+
+    def test_unknownOrder(self):
+        """
+        An unknown order passed to --order raises a L{UsageError}.
+        """
+
+        self.assertRaises(
+            UsageError, self.config.parseOptions, ["--order", "I don't exist"]
+        )
+
+
+class HelpOrderTests(unittest.TestCase):
+    """
+    Tests for the --help-orders flag.
+    """
+
+    def test_help_ordersPrintsSynopsisAndQuits(self):
+        """
+        --help-orders prints each of the available orders and then exits.
+        """
+        self.patch(sys, "stdout", StringIO())
+
+        exc = self.assertRaises(
+            SystemExit, trial.Options().parseOptions, ["--help-orders"]
+        )
+        self.assertEqual(exc.code, 0)
+
+        output = sys.stdout.getvalue()
+
+        msg = "%r with its description not properly described in %r"
+        for orderName, (orderDesc, _) in trial._runOrders.items():
+            match = re.search(
+                f"{re.escape(orderName)}.*{re.escape(orderDesc)}",
+                output,
+            )
+
+            self.assertTrue(match, msg=msg % (orderName, output))

environment/Lib/site-packages/twisted/trial/test/test_skip.py

@@ -0,0 +1,93 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+#
+
+"""
+Tests for L{twisted.trial.util}
+"""
+
+from unittest import skipIf
+
+from twisted.trial.unittest import TestCase
+
+
+@skipIf(True, "Skip all tests when @skipIf is used on a class")
+class SkipDecoratorUsedOnClass(TestCase):
+    """
+    All tests should be skipped because @skipIf decorator is used on
+    this class.
+    """
+
+    def test_shouldNeverRun_1(self):
+        raise Exception("Test should skip and never reach here")
+
+    def test_shouldNeverRun_2(self):
+        raise Exception("Test should skip and never reach here")
+
+
+@skipIf(True, "")
+class SkipDecoratorUsedOnClassWithEmptyReason(TestCase):
+    """
+    All tests should be skipped because @skipIf decorator is used on
+    this class, even if the reason is an empty string
+    """
+
+    def test_shouldNeverRun_1(self):
+        raise Exception("Test should skip and never reach here")
+
+    def test_shouldNeverRun_2(self):
+        raise Exception("Test should skip and never reach here")
+
+
+class SkipDecoratorUsedOnMethods(TestCase):
+    """
+    Only methods where @skipIf decorator is used should be skipped.
+    """
+
+    @skipIf(True, "skipIf decorator used so skip test")
+    def test_shouldNeverRun(self):
+        raise Exception("Test should skip and never reach here")
+
+    @skipIf(True, "")
+    def test_shouldNeverRunWithEmptyReason(self):
+        raise Exception("Test should skip and never reach here")
+
+    def test_shouldShouldRun(self):
+        self.assertTrue(True, "Test should run and not be skipped")
+
+    @skipIf(False, "should not skip")
+    def test_shouldShouldRunWithSkipIfFalse(self):
+        self.assertTrue(True, "Test should run and not be skipped")
+
+    @skipIf(False, "")
+    def test_shouldShouldRunWithSkipIfFalseEmptyReason(self):
+        self.assertTrue(True, "Test should run and not be skipped")
+
+
+class SkipAttributeOnClass(TestCase):
+    """
+    All tests should be skipped because skip attribute is set on
+    this class.
+    """
+
+    skip = "'skip' attribute set on this class, so skip all tests"
+
+    def test_one(self):
+        raise Exception("Test should skip and never reach here")
+
+    def test_two(self):
+        raise Exception("Test should skip and never reach here")
+
+
+class SkipAttributeOnMethods(TestCase):
+    """
+    Only methods where @skipIf decorator is used should be skipped.
+    """
+
+    def test_one(self):
+        raise Exception("Should never reach here")
+
+    test_one.skip = "skip test, skip attribute set on method"  # type: ignore[attr-defined]
+
+    def test_shouldNotSkip(self):
+        self.assertTrue(True, "Test should run and not be skipped")

environment/Lib/site-packages/twisted/trial/test/test_suppression.py

@@ -0,0 +1,152 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Tests for warning suppression features of Trial.
+"""
+
+
+import unittest as pyunit
+
+from twisted.python.reflect import namedAny
+from twisted.trial import unittest
+from twisted.trial.test import suppression
+
+
+class SuppressionMixin:
+    """
+    Tests for the warning suppression features of
+    L{twisted.trial.unittest.SynchronousTestCase}.
+    """
+
+    def runTests(self, suite):
+        suite.run(pyunit.TestResult())
+
+    def _load(self, cls, methodName):
+        """
+        Return a new L{unittest.TestSuite} with a single test method in it.
+
+        @param cls: A L{TestCase} subclass defining a test method.
+
+        @param methodName: The name of the test method from C{cls}.
+        """
+        return pyunit.TestSuite([cls(methodName)])
+
+    def _assertWarnings(self, warnings, which):
+        """
+        Assert that a certain number of warnings with certain messages were
+        emitted in a certain order.
+
+        @param warnings: A list of emitted warnings, as returned by
+            C{flushWarnings}.
+
+        @param which: A list of strings giving warning messages that should
+            appear in C{warnings}.
+
+        @raise self.failureException: If the warning messages given by C{which}
+            do not match the messages in the warning information in C{warnings},
+            or if they do not appear in the same order.
+        """
+        self.assertEqual([warning["message"] for warning in warnings], which)
+
+    def test_setUpSuppression(self):
+        """
+        Suppressions defined by the test method being run are applied to any
+        warnings emitted while running the C{setUp} fixture.
+        """
+        self.runTests(self._load(self.TestSetUpSuppression, "testSuppressMethod"))
+        warningsShown = self.flushWarnings([self.TestSetUpSuppression._emit])
+        self._assertWarnings(
+            warningsShown,
+            [
+                suppression.CLASS_WARNING_MSG,
+                suppression.MODULE_WARNING_MSG,
+                suppression.CLASS_WARNING_MSG,
+                suppression.MODULE_WARNING_MSG,
+            ],
+        )
+
+    def test_tearDownSuppression(self):
+        """
+        Suppressions defined by the test method being run are applied to any
+        warnings emitted while running the C{tearDown} fixture.
+        """
+        self.runTests(self._load(self.TestTearDownSuppression, "testSuppressMethod"))
+        warningsShown = self.flushWarnings([self.TestTearDownSuppression._emit])
+        self._assertWarnings(
+            warningsShown,
+            [
+                suppression.CLASS_WARNING_MSG,
+                suppression.MODULE_WARNING_MSG,
+                suppression.CLASS_WARNING_MSG,
+                suppression.MODULE_WARNING_MSG,
+            ],
+        )
+
+    def test_suppressMethod(self):
+        """
+        A suppression set on a test method prevents warnings emitted by that
+        test method which the suppression matches from being emitted.
+        """
+        self.runTests(self._load(self.TestSuppression, "testSuppressMethod"))
+        warningsShown = self.flushWarnings([self.TestSuppression._emit])
+        self._assertWarnings(
+            warningsShown,
+            [suppression.CLASS_WARNING_MSG, suppression.MODULE_WARNING_MSG],
+        )
+
+    def test_suppressClass(self):
+        """
+        A suppression set on a L{SynchronousTestCase} subclass prevents warnings
+        emitted by any test methods defined on that class which match the
+        suppression from being emitted.
+        """
+        self.runTests(self._load(self.TestSuppression, "testSuppressClass"))
+        warningsShown = self.flushWarnings([self.TestSuppression._emit])
+        self.assertEqual(warningsShown[0]["message"], suppression.METHOD_WARNING_MSG)
+        self.assertEqual(warningsShown[1]["message"], suppression.MODULE_WARNING_MSG)
+        self.assertEqual(len(warningsShown), 2)
+
+    def test_suppressModule(self):
+        """
+        A suppression set on a module prevents warnings emitted by any test
+        mewthods defined in that module which match the suppression from being
+        emitted.
+        """
+        self.runTests(self._load(self.TestSuppression2, "testSuppressModule"))
+        warningsShown = self.flushWarnings([self.TestSuppression._emit])
+        self.assertEqual(warningsShown[0]["message"], suppression.METHOD_WARNING_MSG)
+        self.assertEqual(warningsShown[1]["message"], suppression.CLASS_WARNING_MSG)
+        self.assertEqual(len(warningsShown), 2)
+
+    def test_overrideSuppressClass(self):
+        """
+        The suppression set on a test method completely overrides a suppression
+        with wider scope; if it does not match a warning emitted by that test
+        method, the warning is emitted, even if a wider suppression matches.
+        """
+        self.runTests(self._load(self.TestSuppression, "testOverrideSuppressClass"))
+        warningsShown = self.flushWarnings([self.TestSuppression._emit])
+        self.assertEqual(warningsShown[0]["message"], suppression.METHOD_WARNING_MSG)
+        self.assertEqual(warningsShown[1]["message"], suppression.CLASS_WARNING_MSG)
+        self.assertEqual(warningsShown[2]["message"], suppression.MODULE_WARNING_MSG)
+        self.assertEqual(len(warningsShown), 3)
+
+
+class SynchronousSuppressionTests(SuppressionMixin, unittest.SynchronousTestCase):
+    """
+    @see: L{twisted.trial.test.test_tests}
+    """
+
+    TestSetUpSuppression = namedAny(
+        "twisted.trial.test.suppression.SynchronousTestSetUpSuppression"
+    )
+    TestTearDownSuppression = namedAny(
+        "twisted.trial.test.suppression.SynchronousTestTearDownSuppression"
+    )
+    TestSuppression = namedAny(
+        "twisted.trial.test.suppression.SynchronousTestSuppression"
+    )
+    TestSuppression2 = namedAny(
+        "twisted.trial.test.suppression.SynchronousTestSuppression2"
+    )

environment/Lib/site-packages/twisted/trial/test/test_testcase.py

@@ -0,0 +1,68 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Direct unit tests for L{twisted.trial.unittest.SynchronousTestCase} and
+L{twisted.trial.unittest.TestCase}.
+"""
+
+
+from twisted.trial.unittest import SynchronousTestCase, TestCase
+
+
+class TestCaseMixin:
+    """
+    L{TestCase} tests.
+    """
+
+    def setUp(self):
+        """
+        Create a couple instances of C{MyTestCase}, each for the same test
+        method, to be used in the test methods of this class.
+        """
+        self.first = self.MyTestCase("test_1")
+        self.second = self.MyTestCase("test_1")
+
+    def test_equality(self):
+        """
+        In order for one test method to be runnable twice, two TestCase
+        instances with the same test method name must not compare as equal.
+        """
+        self.assertTrue(self.first == self.first)
+        self.assertTrue(self.first != self.second)
+        self.assertFalse(self.first == self.second)
+
+    def test_hashability(self):
+        """
+        In order for one test method to be runnable twice, two TestCase
+        instances with the same test method name should not have the same
+        hash value.
+        """
+        container = {}
+        container[self.first] = None
+        container[self.second] = None
+        self.assertEqual(len(container), 2)
+
+
+class SynchronousTestCaseTests(TestCaseMixin, SynchronousTestCase):
+    class MyTestCase(SynchronousTestCase):
+        """
+        Some test methods which can be used to test behaviors of
+        L{SynchronousTestCase}.
+        """
+
+        def test_1(self):
+            pass
+
+
+# Yes, subclass SynchronousTestCase again.  There are no interesting behaviors
+# of self being tested below, only of self.MyTestCase.
+class AsynchronousTestCaseTests(TestCaseMixin, SynchronousTestCase):
+    class MyTestCase(TestCase):
+        """
+        Some test methods which can be used to test behaviors of
+        L{TestCase}.
+        """
+
+        def test_1(self):
+            pass

environment/Lib/site-packages/twisted/trial/test/test_util.py

@@ -0,0 +1,649 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+#
+
+"""
+Tests for L{twisted.trial.util}
+"""
+
+
+import locale
+import os
+import sys
+from io import StringIO
+
+from zope.interface import implementer
+
+from hamcrest import assert_that, equal_to
+
+from twisted.internet.base import DelayedCall
+from twisted.internet.interfaces import IProcessTransport
+from twisted.python import filepath
+from twisted.python.failure import Failure
+from twisted.trial import util
+from twisted.trial.unittest import SynchronousTestCase
+from twisted.trial.util import (
+    DirtyReactorAggregateError,
+    _Janitor,
+    acquireAttribute,
+    excInfoOrFailureToExcInfo,
+    openTestLog,
+)
+
+
+class MktempTests(SynchronousTestCase):
+    """
+    Tests for L{TestCase.mktemp}, a helper function for creating temporary file
+    or directory names.
+    """
+
+    def test_name(self):
+        """
+        The path name returned by C{mktemp} is directly beneath a directory
+        which identifies the test method which created the name.
+        """
+        name = self.mktemp()
+        dirs = os.path.dirname(name).split(os.sep)[:-1]
+        self.assertEqual(
+            dirs, ["twisted.trial.test.test_util", "MktempTests", "test_name"]
+        )
+
+    def test_unique(self):
+        """
+        Repeated calls to C{mktemp} return different values.
+        """
+        name = self.mktemp()
+        self.assertNotEqual(name, self.mktemp())
+
+    def test_created(self):
+        """
+        The directory part of the path name returned by C{mktemp} exists.
+        """
+        name = self.mktemp()
+        dirname = os.path.dirname(name)
+        self.assertTrue(os.path.exists(dirname))
+        self.assertFalse(os.path.exists(name))
+
+    def test_location(self):
+        """
+        The path returned by C{mktemp} is beneath the current working directory.
+        """
+        path = os.path.abspath(self.mktemp())
+        self.assertTrue(path.startswith(os.getcwd()))
+
+
+class DirtyReactorAggregateErrorTests(SynchronousTestCase):
+    """
+    Tests for the L{DirtyReactorAggregateError}.
+    """
+
+    def test_formatDelayedCall(self):
+        """
+        Delayed calls are formatted nicely.
+        """
+        error = DirtyReactorAggregateError(["Foo", "bar"])
+        self.assertEqual(
+            str(error),
+            """\
+Reactor was unclean.
+DelayedCalls: (set twisted.internet.base.DelayedCall.debug = True to debug)
+Foo
+bar""",
+        )
+
+    def test_formatSelectables(self):
+        """
+        Selectables are formatted nicely.
+        """
+        error = DirtyReactorAggregateError([], ["selectable 1", "selectable 2"])
+        self.assertEqual(
+            str(error),
+            """\
+Reactor was unclean.
+Selectables:
+selectable 1
+selectable 2""",
+        )
+
+    def test_formatDelayedCallsAndSelectables(self):
+        """
+        Both delayed calls and selectables can appear in the same error.
+        """
+        error = DirtyReactorAggregateError(["bleck", "Boozo"], ["Sel1", "Sel2"])
+        self.assertEqual(
+            str(error),
+            """\
+Reactor was unclean.
+DelayedCalls: (set twisted.internet.base.DelayedCall.debug = True to debug)
+bleck
+Boozo
+Selectables:
+Sel1
+Sel2""",
+        )
+
+
+class StubReactor:
+    """
+    A reactor stub which contains enough functionality to be used with the
+    L{_Janitor}.
+
+    @ivar iterations: A list of the arguments passed to L{iterate}.
+    @ivar removeAllCalled: Number of times that L{removeAll} was called.
+    @ivar selectables: The value that will be returned from L{removeAll}.
+    @ivar delayedCalls: The value to return from L{getDelayedCalls}.
+    """
+
+    def __init__(self, delayedCalls, selectables=None):
+        """
+        @param delayedCalls: See L{StubReactor.delayedCalls}.
+        @param selectables: See L{StubReactor.selectables}.
+        """
+        self.delayedCalls = delayedCalls
+        self.iterations = []
+        self.removeAllCalled = 0
+        if not selectables:
+            selectables = []
+        self.selectables = selectables
+
+    def iterate(self, timeout=None):
+        """
+        Increment C{self.iterations}.
+        """
+        self.iterations.append(timeout)
+
+    def getDelayedCalls(self):
+        """
+        Return C{self.delayedCalls}.
+        """
+        return self.delayedCalls
+
+    def removeAll(self):
+        """
+        Increment C{self.removeAllCalled} and return C{self.selectables}.
+        """
+        self.removeAllCalled += 1
+        return self.selectables
+
+
+class StubErrorReporter:
+    """
+    A subset of L{twisted.trial.itrial.IReporter} which records L{addError}
+    calls.
+
+    @ivar errors: List of two-tuples of (test, error) which were passed to
+        L{addError}.
+    """
+
+    def __init__(self):
+        self.errors = []
+
+    def addError(self, test, error):
+        """
+        Record parameters in C{self.errors}.
+        """
+        self.errors.append((test, error))
+
+
+class JanitorTests(SynchronousTestCase):
+    """
+    Tests for L{_Janitor}!
+    """
+
+    def test_cleanPendingSpinsReactor(self):
+        """
+        During pending-call cleanup, the reactor will be spun twice with an
+        instant timeout. This is not a requirement, it is only a test for
+        current behavior. Hopefully Trial will eventually not do this kind of
+        reactor stuff.
+        """
+        reactor = StubReactor([])
+        jan = _Janitor(None, None, reactor=reactor)
+        jan._cleanPending()
+        self.assertEqual(reactor.iterations, [0, 0])
+
+    def test_cleanPendingCancelsCalls(self):
+        """
+        During pending-call cleanup, the janitor cancels pending timed calls.
+        """
+
+        def func():
+            return "Lulz"
+
+        cancelled = []
+        delayedCall = DelayedCall(300, func, (), {}, cancelled.append, lambda x: None)
+        reactor = StubReactor([delayedCall])
+        jan = _Janitor(None, None, reactor=reactor)
+        jan._cleanPending()
+        self.assertEqual(cancelled, [delayedCall])
+
+    def test_cleanPendingReturnsDelayedCallStrings(self):
+        """
+        The Janitor produces string representations of delayed calls from the
+        delayed call cleanup method. It gets the string representations
+        *before* cancelling the calls; this is important because cancelling the
+        call removes critical debugging information from the string
+        representation.
+        """
+        delayedCall = DelayedCall(
+            300, lambda: None, (), {}, lambda x: None, lambda x: None, seconds=lambda: 0
+        )
+        delayedCallString = str(delayedCall)
+        reactor = StubReactor([delayedCall])
+        jan = _Janitor(None, None, reactor=reactor)
+        strings = jan._cleanPending()
+        self.assertEqual(strings, [delayedCallString])
+
+    def test_cleanReactorRemovesSelectables(self):
+        """
+        The Janitor will remove selectables during reactor cleanup.
+        """
+        reactor = StubReactor([])
+        jan = _Janitor(None, None, reactor=reactor)
+        jan._cleanReactor()
+        self.assertEqual(reactor.removeAllCalled, 1)
+
+    def test_cleanReactorKillsProcesses(self):
+        """
+        The Janitor will kill processes during reactor cleanup.
+        """
+
+        @implementer(IProcessTransport)
+        class StubProcessTransport:
+            """
+            A stub L{IProcessTransport} provider which records signals.
+            @ivar signals: The signals passed to L{signalProcess}.
+            """
+
+            def __init__(self):
+                self.signals = []
+
+            def signalProcess(self, signal):
+                """
+                Append C{signal} to C{self.signals}.
+                """
+                self.signals.append(signal)
+
+        pt = StubProcessTransport()
+        reactor = StubReactor([], [pt])
+        jan = _Janitor(None, None, reactor=reactor)
+        jan._cleanReactor()
+        self.assertEqual(pt.signals, ["KILL"])
+
+    def test_cleanReactorReturnsSelectableStrings(self):
+        """
+        The Janitor returns string representations of the selectables that it
+        cleaned up from the reactor cleanup method.
+        """
+
+        class Selectable:
+            """
+            A stub Selectable which only has an interesting string
+            representation.
+            """
+
+            def __repr__(self) -> str:
+                return "(SELECTABLE!)"
+
+        reactor = StubReactor([], [Selectable()])
+        jan = _Janitor(None, None, reactor=reactor)
+        self.assertEqual(jan._cleanReactor(), ["(SELECTABLE!)"])
+
+    def test_postCaseCleanupNoErrors(self):
+        """
+        The post-case cleanup method will return True and not call C{addError}
+        on the result if there are no pending calls.
+        """
+        reactor = StubReactor([])
+        test = object()
+        reporter = StubErrorReporter()
+        jan = _Janitor(test, reporter, reactor=reactor)
+        self.assertTrue(jan.postCaseCleanup())
+        self.assertEqual(reporter.errors, [])
+
+    def test_postCaseCleanupWithErrors(self):
+        """
+        The post-case cleanup method will return False and call C{addError} on
+        the result with a L{DirtyReactorAggregateError} Failure if there are
+        pending calls.
+        """
+        delayedCall = DelayedCall(
+            300, lambda: None, (), {}, lambda x: None, lambda x: None, seconds=lambda: 0
+        )
+        delayedCallString = str(delayedCall)
+        reactor = StubReactor([delayedCall], [])
+        test = object()
+        reporter = StubErrorReporter()
+        jan = _Janitor(test, reporter, reactor=reactor)
+        self.assertFalse(jan.postCaseCleanup())
+        self.assertEqual(len(reporter.errors), 1)
+        self.assertEqual(reporter.errors[0][1].value.delayedCalls, [delayedCallString])
+
+    def test_postClassCleanupNoErrors(self):
+        """
+        The post-class cleanup method will not call C{addError} on the result
+        if there are no pending calls or selectables.
+        """
+        reactor = StubReactor([])
+        test = object()
+        reporter = StubErrorReporter()
+        jan = _Janitor(test, reporter, reactor=reactor)
+        jan.postClassCleanup()
+        self.assertEqual(reporter.errors, [])
+
+    def test_postClassCleanupWithPendingCallErrors(self):
+        """
+        The post-class cleanup method call C{addError} on the result with a
+        L{DirtyReactorAggregateError} Failure if there are pending calls.
+        """
+        delayedCall = DelayedCall(
+            300, lambda: None, (), {}, lambda x: None, lambda x: None, seconds=lambda: 0
+        )
+        delayedCallString = str(delayedCall)
+        reactor = StubReactor([delayedCall], [])
+        test = object()
+        reporter = StubErrorReporter()
+        jan = _Janitor(test, reporter, reactor=reactor)
+        jan.postClassCleanup()
+        self.assertEqual(len(reporter.errors), 1)
+        self.assertEqual(reporter.errors[0][1].value.delayedCalls, [delayedCallString])
+
+    def test_postClassCleanupWithSelectableErrors(self):
+        """
+        The post-class cleanup method call C{addError} on the result with a
+        L{DirtyReactorAggregateError} Failure if there are selectables.
+        """
+        selectable = "SELECTABLE HERE"
+        reactor = StubReactor([], [selectable])
+        test = object()
+        reporter = StubErrorReporter()
+        jan = _Janitor(test, reporter, reactor=reactor)
+        jan.postClassCleanup()
+        self.assertEqual(len(reporter.errors), 1)
+        self.assertEqual(reporter.errors[0][1].value.selectables, [repr(selectable)])
+
+
+class RemoveSafelyTests(SynchronousTestCase):
+    """
+    Tests for L{util._removeSafely}.
+    """
+
+    def test_removeSafelyNoTrialMarker(self):
+        """
+        If a path doesn't contain a node named C{"_trial_marker"}, that path is
+        not removed by L{util._removeSafely} and a L{util._NoTrialMarker}
+        exception is raised instead.
+        """
+        directory = self.mktemp().encode("utf-8")
+        os.mkdir(directory)
+        dirPath = filepath.FilePath(directory)
+        self.assertRaises(util._NoTrialMarker, util._removeSafely, dirPath)
+
+    def test_removeSafelyRemoveFailsMoveSucceeds(self):
+        """
+        If an L{OSError} is raised while removing a path in
+        L{util._removeSafely}, an attempt is made to move the path to a new
+        name.
+        """
+
+        def dummyRemove():
+            """
+            Raise an C{OSError} to emulate the branch of L{util._removeSafely}
+            in which path removal fails.
+            """
+            raise OSError()
+
+        # Patch stdout so we can check the print statements in _removeSafely
+        out = StringIO()
+        self.patch(sys, "stdout", out)
+
+        # Set up a trial directory with a _trial_marker
+        directory = self.mktemp().encode("utf-8")
+        os.mkdir(directory)
+        dirPath = filepath.FilePath(directory)
+        dirPath.child(b"_trial_marker").touch()
+        # Ensure that path.remove() raises an OSError
+        dirPath.remove = dummyRemove
+
+        util._removeSafely(dirPath)
+        self.assertIn("could not remove FilePath", out.getvalue())
+
+    def test_removeSafelyRemoveFailsMoveFails(self):
+        """
+        If an L{OSError} is raised while removing a path in
+        L{util._removeSafely}, an attempt is made to move the path to a new
+        name. If that attempt fails, the L{OSError} is re-raised.
+        """
+
+        def dummyRemove():
+            """
+            Raise an C{OSError} to emulate the branch of L{util._removeSafely}
+            in which path removal fails.
+            """
+            raise OSError("path removal failed")
+
+        def dummyMoveTo(path):
+            """
+            Raise an C{OSError} to emulate the branch of L{util._removeSafely}
+            in which path movement fails.
+            """
+            raise OSError("path movement failed")
+
+        # Patch stdout so we can check the print statements in _removeSafely
+        out = StringIO()
+        self.patch(sys, "stdout", out)
+
+        # Set up a trial directory with a _trial_marker
+        directory = self.mktemp().encode("utf-8")
+        os.mkdir(directory)
+        dirPath = filepath.FilePath(directory)
+        dirPath.child(b"_trial_marker").touch()
+
+        # Ensure that path.remove() and path.moveTo() both raise OSErrors
+        dirPath.remove = dummyRemove
+        dirPath.moveTo = dummyMoveTo
+
+        error = self.assertRaises(OSError, util._removeSafely, dirPath)
+        self.assertEqual(str(error), "path movement failed")
+        self.assertIn("could not remove FilePath", out.getvalue())
+
+
+class ExcInfoTests(SynchronousTestCase):
+    """
+    Tests for L{excInfoOrFailureToExcInfo}.
+    """
+
+    def test_excInfo(self):
+        """
+        L{excInfoOrFailureToExcInfo} returns exactly what it is passed, if it is
+        passed a tuple like the one returned by L{sys.exc_info}.
+        """
+        info = (ValueError, ValueError("foo"), None)
+        self.assertTrue(info is excInfoOrFailureToExcInfo(info))
+
+    def test_failure(self):
+        """
+        When called with a L{Failure} instance, L{excInfoOrFailureToExcInfo}
+        returns a tuple like the one returned by L{sys.exc_info}, with the
+        elements taken from the type, value, and traceback of the failure.
+        """
+        try:
+            1 / 0
+        except BaseException:
+            f = Failure()
+        self.assertEqual((f.type, f.value, f.tb), excInfoOrFailureToExcInfo(f))
+
+
+class AcquireAttributeTests(SynchronousTestCase):
+    """
+    Tests for L{acquireAttribute}.
+    """
+
+    def test_foundOnEarlierObject(self):
+        """
+        The value returned by L{acquireAttribute} is the value of the requested
+        attribute on the first object in the list passed in which has that
+        attribute.
+        """
+        self.value = value = object()
+        self.assertTrue(value is acquireAttribute([self, object()], "value"))
+
+    def test_foundOnLaterObject(self):
+        """
+        The same as L{test_foundOnEarlierObject}, but for the case where the 2nd
+        element in the object list has the attribute and the first does not.
+        """
+        self.value = value = object()
+        self.assertTrue(value is acquireAttribute([object(), self], "value"))
+
+    def test_notFoundException(self):
+        """
+        If none of the objects passed in the list to L{acquireAttribute} have
+        the requested attribute, L{AttributeError} is raised.
+        """
+        self.assertRaises(AttributeError, acquireAttribute, [object()], "foo")
+
+    def test_notFoundDefault(self):
+        """
+        If none of the objects passed in the list to L{acquireAttribute} have
+        the requested attribute and a default value is given, the default value
+        is returned.
+        """
+        default = object()
+        self.assertTrue(default is acquireAttribute([object()], "foo", default))
+
+
+class ListToPhraseTests(SynchronousTestCase):
+    """
+    Input is transformed into a string representation of the list,
+    with each item separated by delimiter (defaulting to a comma) and the final
+    two being separated by a final delimiter.
+    """
+
+    def test_empty(self):
+        """
+        If things is empty, an empty string is returned.
+        """
+        sample = []
+        expected = ""
+        result = util._listToPhrase(sample, "and")
+        self.assertEqual(expected, result)
+
+    def test_oneWord(self):
+        """
+        With a single item, the item is returned.
+        """
+        sample = ["One"]
+        expected = "One"
+        result = util._listToPhrase(sample, "and")
+        self.assertEqual(expected, result)
+
+    def test_twoWords(self):
+        """
+        Two words are separated by the final delimiter.
+        """
+        sample = ["One", "Two"]
+        expected = "One and Two"
+        result = util._listToPhrase(sample, "and")
+        self.assertEqual(expected, result)
+
+    def test_threeWords(self):
+        """
+        With more than two words, the first two are separated by the delimiter.
+        """
+        sample = ["One", "Two", "Three"]
+        expected = "One, Two, and Three"
+        result = util._listToPhrase(sample, "and")
+        self.assertEqual(expected, result)
+
+    def test_fourWords(self):
+        """
+        If a delimiter is specified, it is used instead of the default comma.
+        """
+        sample = ["One", "Two", "Three", "Four"]
+        expected = "One; Two; Three; or Four"
+        result = util._listToPhrase(sample, "or", delimiter="; ")
+        self.assertEqual(expected, result)
+
+    def test_notString(self):
+        """
+        If something in things is not a string, it is converted into one.
+        """
+        sample = [1, 2, "three"]
+        expected = "1, 2, and three"
+        result = util._listToPhrase(sample, "and")
+        self.assertEqual(expected, result)
+
+    def test_stringTypeError(self):
+        """
+        If things is a string, a TypeError is raised.
+        """
+        sample = "One, two, three"
+        error = self.assertRaises(TypeError, util._listToPhrase, sample, "and")
+        self.assertEqual(str(error), "Things must be a list or a tuple")
+
+    def test_iteratorTypeError(self):
+        """
+        If things is an iterator, a TypeError is raised.
+        """
+        sample = iter([1, 2, 3])
+        error = self.assertRaises(TypeError, util._listToPhrase, sample, "and")
+        self.assertEqual(str(error), "Things must be a list or a tuple")
+
+    def test_generatorTypeError(self):
+        """
+        If things is a generator, a TypeError is raised.
+        """
+
+        def sample():
+            yield from range(2)
+
+        error = self.assertRaises(TypeError, util._listToPhrase, sample, "and")
+        self.assertEqual(str(error), "Things must be a list or a tuple")
+
+
+class OpenTestLogTests(SynchronousTestCase):
+    """
+    Tests for C{openTestLog}.
+    """
+
+    def test_utf8(self):
+        """
+        The log file is opened in text mode and uses UTF-8 for encoding.
+        """
+        # Modern OSes are running default locale in UTF-8 and this is what is
+        # used by Python at startup.  For this test, we force an ASCII default
+        # encoding so that we can see that UTF-8 is used even if it isn't the
+        # platform default.
+        currentLocale = locale.getlocale()
+        self.addCleanup(locale.setlocale, locale.LC_ALL, currentLocale)
+        locale.setlocale(locale.LC_ALL, ("C", "ascii"))
+
+        text = "Here comes the \N{SUN}"
+        p = filepath.FilePath(self.mktemp())
+        with openTestLog(p) as f:
+            f.write(text)
+
+        with open(p.path, "rb") as f:
+            written = f.read()
+
+        assert_that(text.encode("utf-8"), equal_to(written))
+
+    def test_append(self):
+        """
+        The log file is opened in append mode so if runner configuration specifies
+        an existing log file its contents are not wiped out.
+        """
+        existingText = "Hello, world.\n "
+        newText = "Goodbye, world.\n"
+        expected = f"Hello, world.{os.linesep} Goodbye, world.{os.linesep}"
+        p = filepath.FilePath(self.mktemp())
+        with openTestLog(p) as f:
+            f.write(existingText)
+        with openTestLog(p) as f:
+            f.write(newText)
+
+        assert_that(
+            p.getContent().decode("utf-8"),
+            equal_to(expected),
+        )

environment/Lib/site-packages/twisted/trial/test/test_warning.py

@@ -0,0 +1,519 @@
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Tests for Trial's interaction with the Python warning system.
+"""
+
+
+import sys
+import warnings
+from io import StringIO
+from unittest import TestResult
+
+from twisted.python.filepath import FilePath
+from twisted.trial._synctest import _collectWarnings, _setWarningRegistryToNone
+from twisted.trial.unittest import SynchronousTestCase
+
+
+class Mask:
+    """
+    Hide a test case definition from trial's automatic discovery mechanism.
+    """
+
+    class MockTests(SynchronousTestCase):
+        """
+        A test case which is used by L{FlushWarningsTests} to verify behavior
+        which cannot be verified by code inside a single test method.
+        """
+
+        message = "some warning text"
+        category = UserWarning
+
+        def test_unflushed(self):
+            """
+            Generate a warning and don't flush it.
+            """
+            warnings.warn(self.message, self.category)
+
+        def test_flushed(self):
+            """
+            Generate a warning and flush it.
+            """
+            warnings.warn(self.message, self.category)
+            self.assertEqual(len(self.flushWarnings()), 1)
+
+
+class FlushWarningsTests(SynchronousTestCase):
+    """
+    Tests for C{flushWarnings}, an API for examining the warnings
+    emitted so far in a test.
+    """
+
+    def assertDictSubset(self, set, subset):
+        """
+        Assert that all the keys present in C{subset} are also present in
+        C{set} and that the corresponding values are equal.
+        """
+        for k, v in subset.items():
+            self.assertEqual(set[k], v)
+
+    def assertDictSubsets(self, sets, subsets):
+        """
+        For each pair of corresponding elements in C{sets} and C{subsets},
+        assert that the element from C{subsets} is a subset of the element from
+        C{sets}.
+        """
+        self.assertEqual(len(sets), len(subsets))
+        for a, b in zip(sets, subsets):
+            self.assertDictSubset(a, b)
+
+    def test_none(self):
+        """
+        If no warnings are emitted by a test, C{flushWarnings} returns an empty
+        list.
+        """
+        self.assertEqual(self.flushWarnings(), [])
+
+    def test_several(self):
+        """
+        If several warnings are emitted by a test, C{flushWarnings} returns a
+        list containing all of them.
+        """
+        firstMessage = "first warning message"
+        firstCategory = UserWarning
+        warnings.warn(message=firstMessage, category=firstCategory)
+
+        secondMessage = "second warning message"
+        secondCategory = RuntimeWarning
+        warnings.warn(message=secondMessage, category=secondCategory)
+
+        self.assertDictSubsets(
+            self.flushWarnings(),
+            [
+                {"category": firstCategory, "message": firstMessage},
+                {"category": secondCategory, "message": secondMessage},
+            ],
+        )
+
+    def test_repeated(self):
+        """
+        The same warning triggered twice from the same place is included twice
+        in the list returned by C{flushWarnings}.
+        """
+        message = "the message"
+        category = RuntimeWarning
+        for i in range(2):
+            warnings.warn(message=message, category=category)
+
+        self.assertDictSubsets(
+            self.flushWarnings(), [{"category": category, "message": message}] * 2
+        )
+
+    def test_cleared(self):
+        """
+        After a particular warning event has been returned by C{flushWarnings},
+        it is not returned by subsequent calls.
+        """
+        message = "the message"
+        category = RuntimeWarning
+        warnings.warn(message=message, category=category)
+        self.assertDictSubsets(
+            self.flushWarnings(), [{"category": category, "message": message}]
+        )
+        self.assertEqual(self.flushWarnings(), [])
+
+    def test_unflushed(self):
+        """
+        Any warnings emitted by a test which are not flushed are emitted to the
+        Python warning system.
+        """
+        result = TestResult()
+        case = Mask.MockTests("test_unflushed")
+        case.run(result)
+        warningsShown = self.flushWarnings([Mask.MockTests.test_unflushed])
+        self.assertEqual(warningsShown[0]["message"], "some warning text")
+        self.assertIdentical(warningsShown[0]["category"], UserWarning)
+
+        where = type(case).test_unflushed.__code__
+        filename = where.co_filename
+        # If someone edits MockTests.test_unflushed, the value added to
+        # firstlineno might need to change.
+        lineno = where.co_firstlineno + 4
+
+        self.assertEqual(warningsShown[0]["filename"], filename)
+        self.assertEqual(warningsShown[0]["lineno"], lineno)
+
+        self.assertEqual(len(warningsShown), 1)
+
+    def test_flushed(self):
+        """
+        Any warnings emitted by a test which are flushed are not emitted to the
+        Python warning system.
+        """
+        result = TestResult()
+        case = Mask.MockTests("test_flushed")
+        output = StringIO()
+        monkey = self.patch(sys, "stdout", output)
+        case.run(result)
+        monkey.restore()
+        self.assertEqual(output.getvalue(), "")
+
+    def test_warningsConfiguredAsErrors(self):
+        """
+        If a warnings filter has been installed which turns warnings into
+        exceptions, tests have an error added to the reporter for them for each
+        unflushed warning.
+        """
+
+        class CustomWarning(Warning):
+            pass
+
+        result = TestResult()
+        case = Mask.MockTests("test_unflushed")
+        case.category = CustomWarning
+
+        originalWarnings = warnings.filters[:]
+        try:
+            warnings.simplefilter("error")
+            case.run(result)
+            self.assertEqual(len(result.errors), 1)
+            self.assertIdentical(result.errors[0][0], case)
+            self.assertTrue(
+                # Different python versions differ in whether they report the
+                # fully qualified class name or just the class name.
+                result.errors[0][1]
+                .splitlines()[-1]
+                .endswith("CustomWarning: some warning text")
+            )
+        finally:
+            warnings.filters[:] = originalWarnings
+
+    def test_flushedWarningsConfiguredAsErrors(self):
+        """
+        If a warnings filter has been installed which turns warnings into
+        exceptions, tests which emit those warnings but flush them do not have
+        an error added to the reporter.
+        """
+
+        class CustomWarning(Warning):
+            pass
+
+        result = TestResult()
+        case = Mask.MockTests("test_flushed")
+        case.category = CustomWarning
+
+        originalWarnings = warnings.filters[:]
+        try:
+            warnings.simplefilter("error")
+            case.run(result)
+            self.assertEqual(result.errors, [])
+        finally:
+            warnings.filters[:] = originalWarnings
+
+    def test_multipleFlushes(self):
+        """
+        Any warnings emitted after a call to C{flushWarnings} can be flushed by
+        another call to C{flushWarnings}.
+        """
+        warnings.warn("first message")
+        self.assertEqual(len(self.flushWarnings()), 1)
+        warnings.warn("second message")
+        self.assertEqual(len(self.flushWarnings()), 1)
+
+    def test_filterOnOffendingFunction(self):
+        """
+        The list returned by C{flushWarnings} includes only those
+        warnings which refer to the source of the function passed as the value
+        for C{offendingFunction}, if a value is passed for that parameter.
+        """
+        firstMessage = "first warning text"
+        firstCategory = UserWarning
+
+        def one():
+            warnings.warn(firstMessage, firstCategory, stacklevel=1)
+
+        secondMessage = "some text"
+        secondCategory = RuntimeWarning
+
+        def two():
+            warnings.warn(secondMessage, secondCategory, stacklevel=1)
+
+        one()
+        two()
+
+        self.assertDictSubsets(
+            self.flushWarnings(offendingFunctions=[one]),
+            [{"category": firstCategory, "message": firstMessage}],
+        )
+        self.assertDictSubsets(
+            self.flushWarnings(offendingFunctions=[two]),
+            [{"category": secondCategory, "message": secondMessage}],
+        )
+
+    def test_functionBoundaries(self):
+        """
+        Verify that warnings emitted at the very edges of a function are still
+        determined to be emitted from that function.
+        """
+
+        def warner():
+            warnings.warn("first line warning")
+            warnings.warn("internal line warning")
+            warnings.warn("last line warning")
+
+        warner()
+        self.assertEqual(len(self.flushWarnings(offendingFunctions=[warner])), 3)
+
+    def test_invalidFilter(self):
+        """
+        If an object which is neither a function nor a method is included in the
+        C{offendingFunctions} list, C{flushWarnings} raises L{ValueError}.  Such
+        a call flushes no warnings.
+        """
+        warnings.warn("oh no")
+        self.assertRaises(ValueError, self.flushWarnings, [None])
+        self.assertEqual(len(self.flushWarnings()), 1)
+
+    def test_missingSource(self):
+        """
+        Warnings emitted by a function the source code of which is not
+        available can still be flushed.
+        """
+        package = FilePath(self.mktemp().encode("utf-8")).child(
+            b"twisted_private_helper"
+        )
+        package.makedirs()
+        package.child(b"__init__.py").setContent(b"")
+        package.child(b"missingsourcefile.py").setContent(
+            b"""
+import warnings
+def foo():
+    warnings.warn("oh no")
+"""
+        )
+        pathEntry = package.parent().path.decode("utf-8")
+        sys.path.insert(0, pathEntry)
+        self.addCleanup(sys.path.remove, pathEntry)
+        from twisted_private_helper import missingsourcefile  # type: ignore[import]
+
+        self.addCleanup(sys.modules.pop, "twisted_private_helper")
+        self.addCleanup(sys.modules.pop, missingsourcefile.__name__)
+        package.child(b"missingsourcefile.py").remove()
+
+        missingsourcefile.foo()
+        self.assertEqual(len(self.flushWarnings([missingsourcefile.foo])), 1)
+
+    def test_renamedSource(self):
+        """
+        Warnings emitted by a function defined in a file which has been renamed
+        since it was initially compiled can still be flushed.
+
+        This is testing the code which specifically supports working around the
+        unfortunate behavior of CPython to write a .py source file name into
+        the .pyc files it generates and then trust that it is correct in
+        various places.  If source files are renamed, .pyc files may not be
+        regenerated, but they will contain incorrect filenames.
+        """
+        package = FilePath(self.mktemp().encode("utf-8")).child(
+            b"twisted_private_helper"
+        )
+        package.makedirs()
+        package.child(b"__init__.py").setContent(b"")
+        package.child(b"module.py").setContent(
+            b"""
+import warnings
+def foo():
+    warnings.warn("oh no")
+"""
+        )
+        pathEntry = package.parent().path.decode("utf-8")
+        sys.path.insert(0, pathEntry)
+        self.addCleanup(sys.path.remove, pathEntry)
+
+        # Import it to cause pycs to be generated
+        from twisted_private_helper import module
+
+        # Clean up the state resulting from that import; we're not going to use
+        # this module, so it should go away.
+        del sys.modules["twisted_private_helper"]
+        del sys.modules[module.__name__]
+
+        # Some Python versions have extra state related to the just
+        # imported/renamed package.  Clean it up too.  See also
+        # http://bugs.python.org/issue15912
+        try:
+            from importlib import invalidate_caches
+        except ImportError:
+            pass
+        else:
+            invalidate_caches()
+
+        # Rename the source directory
+        package.moveTo(package.sibling(b"twisted_renamed_helper"))
+
+        # Import the newly renamed version
+        from twisted_renamed_helper import module  # type: ignore[import]
+
+        self.addCleanup(sys.modules.pop, "twisted_renamed_helper")
+        self.addCleanup(sys.modules.pop, module.__name__)
+
+        # Generate the warning
+        module.foo()
+
+        # Flush it
+        self.assertEqual(len(self.flushWarnings([module.foo])), 1)
+
+    def test_offendingFunctions_deep_branch(self):
+        """
+        In Python 3.6 the dis.findlinestarts documented behaviour
+        was changed such that the reported lines might not be sorted ascending.
+        In Python 3.10 PEP 626 introduced byte-code change such that the last
+        line of a function wasn't always associated with the last byte-code.
+        In the past flushWarning was not detecting that such a function was
+        associated with any warnings.
+        """
+
+        def foo(a=1, b=1):
+            if a:
+                if b:
+                    warnings.warn("oh no")
+                else:
+                    pass
+
+        # Generate the warning
+        foo()
+
+        # Flush it
+        self.assertEqual(len(self.flushWarnings([foo])), 1)
+
+
+class FakeWarning(Warning):
+    pass
+
+
+class CollectWarningsTests(SynchronousTestCase):
+    """
+    Tests for L{_collectWarnings}.
+    """
+
+    def test_callsObserver(self):
+        """
+        L{_collectWarnings} calls the observer with each emitted warning.
+        """
+        firstMessage = "dummy calls observer warning"
+        secondMessage = firstMessage[::-1]
+        thirdMessage = Warning(1, 2, 3)
+        events = []
+
+        def f():
+            events.append("call")
+            warnings.warn(firstMessage)
+            warnings.warn(secondMessage)
+            warnings.warn(thirdMessage)
+            events.append("returning")
+
+        _collectWarnings(events.append, f)
+
+        self.assertEqual(events[0], "call")
+        self.assertEqual(events[1].message, firstMessage)
+        self.assertEqual(events[2].message, secondMessage)
+        self.assertEqual(events[3].message, str(thirdMessage))
+        self.assertEqual(events[4], "returning")
+        self.assertEqual(len(events), 5)
+
+    def test_suppresses(self):
+        """
+        Any warnings emitted by a call to a function passed to
+        L{_collectWarnings} are not actually emitted to the warning system.
+        """
+        output = StringIO()
+        self.patch(sys, "stdout", output)
+        _collectWarnings(lambda x: None, warnings.warn, "text")
+        self.assertEqual(output.getvalue(), "")
+
+    def test_callsFunction(self):
+        """
+        L{_collectWarnings} returns the result of calling the callable passed to
+        it with the parameters given.
+        """
+        arguments = []
+        value = object()
+
+        def f(*args, **kwargs):
+            arguments.append((args, kwargs))
+            return value
+
+        result = _collectWarnings(lambda x: None, f, 1, "a", b=2, c="d")
+        self.assertEqual(arguments, [((1, "a"), {"b": 2, "c": "d"})])
+        self.assertIdentical(result, value)
+
+    def test_duplicateWarningCollected(self):
+        """
+        Subsequent emissions of a warning from a particular source site can be
+        collected by L{_collectWarnings}.  In particular, the per-module
+        emitted-warning cache should be bypassed (I{__warningregistry__}).
+        """
+        # Make sure the worst case is tested: if __warningregistry__ isn't in a
+        # module's globals, then the warning system will add it and start using
+        # it to avoid emitting duplicate warnings.  Delete __warningregistry__
+        # to ensure that even modules which are first imported as a test is
+        # running still interact properly with the warning system.
+        global __warningregistry__
+        del __warningregistry__
+
+        def f():
+            warnings.warn("foo")
+
+        warnings.simplefilter("default")
+        f()
+        events = []
+        _collectWarnings(events.append, f)
+        self.assertEqual(len(events), 1)
+        self.assertEqual(events[0].message, "foo")
+        self.assertEqual(len(self.flushWarnings()), 1)
+
+    def test_immutableObject(self):
+        """
+        L{_collectWarnings}'s behavior is not altered by the presence of an
+        object which cannot have attributes set on it as a value in
+        C{sys.modules}.
+        """
+        key = object()
+        sys.modules[key] = key
+        self.addCleanup(sys.modules.pop, key)
+        self.test_duplicateWarningCollected()
+
+    def test_setWarningRegistryChangeWhileIterating(self):
+        """
+        If the dictionary passed to L{_setWarningRegistryToNone} changes size
+        partway through the process, C{_setWarningRegistryToNone} continues to
+        set C{__warningregistry__} to L{None} on the rest of the values anyway.
+
+
+        This might be caused by C{sys.modules} containing something that's not
+        really a module and imports things on setattr.  py.test does this, as
+        does L{twisted.python.deprecate.deprecatedModuleAttribute}.
+        """
+        d = {}
+
+        class A:
+            def __init__(self, key):
+                self.__dict__["_key"] = key
+
+            def __setattr__(self, value, item):
+                d[self._key] = None
+
+        key1 = object()
+        key2 = object()
+        d[key1] = A(key2)
+
+        key3 = object()
+        key4 = object()
+        d[key3] = A(key4)
+
+        _setWarningRegistryToNone(d)
+
+        # If both key2 and key4 were added, then both A instanced were
+        # processed.
+        self.assertEqual({key1, key2, key3, key4}, set(d.keys()))

environment/Lib/site-packages/twisted/trial/test/weird.py

@@ -0,0 +1,23 @@
+import unittest
+
+from twisted.internet import defer
+
+# Used in test_tests.UnhandledDeferredTests
+
+
+class TestBleeding(unittest.TestCase):
+    """This test creates an unhandled Deferred and leaves it in a cycle.
+
+    The Deferred is left in a cycle so that the garbage collector won't pick it
+    up immediately.  We were having some problems where unhandled Deferreds in
+    one test were failing random other tests. (See #1507, #1213)
+    """
+
+    def test_unhandledDeferred(self):
+        try:
+            1 / 0
+        except ZeroDivisionError:
+            f = defer.fail()
+        # these two lines create the cycle. don't remove them
+        l = [f]
+        l.append(l)