17.12
This commit is contained in:
Mai Gillmann
@@ -0,0 +1,86 @@
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from .._core import Automaton, NoTransition
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from unittest import TestCase
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class CoreTests(TestCase):
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"""
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Tests for Automat's (currently private, implementation detail) core.
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"""
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def test_NoTransition(self):
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"""
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A L{NoTransition} exception describes the state and input symbol
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that caused it.
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"""
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# NoTransition requires two arguments
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with self.assertRaises(TypeError):
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NoTransition()
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state = "current-state"
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symbol = "transitionless-symbol"
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noTransitionException = NoTransition(state=state, symbol=symbol)
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self.assertIs(noTransitionException.symbol, symbol)
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self.assertIn(state, str(noTransitionException))
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self.assertIn(symbol, str(noTransitionException))
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def test_noOutputForInput(self):
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"""
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L{Automaton.outputForInput} raises L{NoTransition} if no
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transition for that input is defined.
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"""
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a = Automaton()
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self.assertRaises(NoTransition, a.outputForInput,
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"no-state", "no-symbol")
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def test_oneTransition(self):
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"""
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L{Automaton.addTransition} adds its input symbol to
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L{Automaton.inputAlphabet}, all its outputs to
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L{Automaton.outputAlphabet}, and causes L{Automaton.outputForInput} to
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start returning the new state and output symbols.
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"""
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a = Automaton()
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a.addTransition("beginning", "begin", "ending", ["end"])
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self.assertEqual(a.inputAlphabet(), {"begin"})
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self.assertEqual(a.outputAlphabet(), {"end"})
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self.assertEqual(a.outputForInput("beginning", "begin"),
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("ending", ["end"]))
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self.assertEqual(a.states(), {"beginning", "ending"})
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def test_oneTransition_nonIterableOutputs(self):
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"""
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L{Automaton.addTransition} raises a TypeError when given outputs
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that aren't iterable and doesn't add any transitions.
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"""
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a = Automaton()
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nonIterableOutputs = 1
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self.assertRaises(
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TypeError,
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a.addTransition,
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"fromState", "viaSymbol", "toState", nonIterableOutputs)
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self.assertFalse(a.inputAlphabet())
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self.assertFalse(a.outputAlphabet())
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self.assertFalse(a.states())
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self.assertFalse(a.allTransitions())
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def test_initialState(self):
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"""
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L{Automaton.initialState} is a descriptor that sets the initial
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state if it's not yet set, and raises L{ValueError} if it is.
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"""
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a = Automaton()
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a.initialState = "a state"
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self.assertEqual(a.initialState, "a state")
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with self.assertRaises(ValueError):
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a.initialState = "another state"
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# FIXME: addTransition for transition that's been added before
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@@ -0,0 +1,609 @@
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import operator
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import os
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import shutil
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import sys
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import textwrap
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import tempfile
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from unittest import skipIf, TestCase
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import six
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def isTwistedInstalled():
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try:
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__import__('twisted')
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except ImportError:
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return False
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else:
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return True
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class _WritesPythonModules(TestCase):
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"""
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A helper that enables generating Python module test fixtures.
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"""
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def setUp(self):
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super(_WritesPythonModules, self).setUp()
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from twisted.python.modules import getModule, PythonPath
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from twisted.python.filepath import FilePath
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self.getModule = getModule
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self.PythonPath = PythonPath
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self.FilePath = FilePath
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self.originalSysModules = set(sys.modules.keys())
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self.savedSysPath = sys.path[:]
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self.pathDir = tempfile.mkdtemp()
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self.makeImportable(self.pathDir)
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def tearDown(self):
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super(_WritesPythonModules, self).tearDown()
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sys.path[:] = self.savedSysPath
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modulesToDelete = six.viewkeys(sys.modules) - self.originalSysModules
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for module in modulesToDelete:
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del sys.modules[module]
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shutil.rmtree(self.pathDir)
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def makeImportable(self, path):
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sys.path.append(path)
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def writeSourceInto(self, source, path, moduleName):
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directory = self.FilePath(path)
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module = directory.child(moduleName)
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# FilePath always opens a file in binary mode - but that will
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# break on Python 3
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with open(module.path, 'w') as f:
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f.write(textwrap.dedent(source))
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return self.PythonPath([directory.path])
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def makeModule(self, source, path, moduleName):
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pythonModuleName, _ = os.path.splitext(moduleName)
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return self.writeSourceInto(source, path, moduleName)[pythonModuleName]
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def attributesAsDict(self, hasIterAttributes):
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return {attr.name: attr for attr in hasIterAttributes.iterAttributes()}
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def loadModuleAsDict(self, module):
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module.load()
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return self.attributesAsDict(module)
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def makeModuleAsDict(self, source, path, name):
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return self.loadModuleAsDict(self.makeModule(source, path, name))
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@skipIf(not isTwistedInstalled(), "Twisted is not installed.")
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class OriginalLocationTests(_WritesPythonModules):
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"""
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Tests that L{isOriginalLocation} detects when a
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L{PythonAttribute}'s FQPN refers to an object inside the module
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where it was defined.
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For example: A L{twisted.python.modules.PythonAttribute} with a
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name of 'foo.bar' that refers to a 'bar' object defined in module
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'baz' does *not* refer to bar's original location, while a
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L{PythonAttribute} with a name of 'baz.bar' does.
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"""
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def setUp(self):
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super(OriginalLocationTests, self).setUp()
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from .._discover import isOriginalLocation
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self.isOriginalLocation = isOriginalLocation
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def test_failsWithNoModule(self):
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"""
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L{isOriginalLocation} returns False when the attribute refers to an
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object whose source module cannot be determined.
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"""
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source = """\
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class Fake(object):
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pass
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hasEmptyModule = Fake()
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hasEmptyModule.__module__ = None
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"""
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moduleDict = self.makeModuleAsDict(source,
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self.pathDir,
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'empty_module_attr.py')
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self.assertFalse(self.isOriginalLocation(
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moduleDict['empty_module_attr.hasEmptyModule']))
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def test_failsWithDifferentModule(self):
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"""
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L{isOriginalLocation} returns False when the attribute refers to
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an object outside of the module where that object was defined.
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"""
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originalSource = """\
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class ImportThisClass(object):
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pass
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importThisObject = ImportThisClass()
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importThisNestingObject = ImportThisClass()
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importThisNestingObject.nestedObject = ImportThisClass()
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"""
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importingSource = """\
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from original import (ImportThisClass,
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importThisObject,
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importThisNestingObject)
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"""
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self.makeModule(originalSource, self.pathDir, 'original.py')
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importingDict = self.makeModuleAsDict(importingSource,
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self.pathDir,
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'importing.py')
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self.assertFalse(
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self.isOriginalLocation(
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importingDict['importing.ImportThisClass']))
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self.assertFalse(
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self.isOriginalLocation(
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importingDict['importing.importThisObject']))
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nestingObject = importingDict['importing.importThisNestingObject']
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nestingObjectDict = self.attributesAsDict(nestingObject)
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nestedObject = nestingObjectDict[
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'importing.importThisNestingObject.nestedObject']
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self.assertFalse(self.isOriginalLocation(nestedObject))
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def test_succeedsWithSameModule(self):
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"""
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L{isOriginalLocation} returns True when the attribute refers to an
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object inside the module where that object was defined.
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"""
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mSource = textwrap.dedent("""
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class ThisClassWasDefinedHere(object):
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pass
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anObject = ThisClassWasDefinedHere()
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aNestingObject = ThisClassWasDefinedHere()
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aNestingObject.nestedObject = ThisClassWasDefinedHere()
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""")
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mDict = self.makeModuleAsDict(mSource, self.pathDir, 'm.py')
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self.assertTrue(self.isOriginalLocation(
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mDict['m.ThisClassWasDefinedHere']))
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self.assertTrue(self.isOriginalLocation(mDict['m.aNestingObject']))
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nestingObject = mDict['m.aNestingObject']
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nestingObjectDict = self.attributesAsDict(nestingObject)
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nestedObject = nestingObjectDict['m.aNestingObject.nestedObject']
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self.assertTrue(self.isOriginalLocation(nestedObject))
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@skipIf(not isTwistedInstalled(), "Twisted is not installed.")
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class FindMachinesViaWrapperTests(_WritesPythonModules):
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"""
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L{findMachinesViaWrapper} recursively yields FQPN,
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L{MethodicalMachine} pairs in and under a given
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L{twisted.python.modules.PythonModule} or
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L{twisted.python.modules.PythonAttribute}.
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"""
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TEST_MODULE_SOURCE = """
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from automat import MethodicalMachine
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class PythonClass(object):
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_classMachine = MethodicalMachine()
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class NestedClass(object):
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_nestedClassMachine = MethodicalMachine()
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ignoredAttribute = "I am ignored."
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def ignoredMethod(self):
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"I am also ignored."
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rootLevelMachine = MethodicalMachine()
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ignoredPythonObject = PythonClass()
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anotherIgnoredPythonObject = "I am ignored."
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"""
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def setUp(self):
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super(FindMachinesViaWrapperTests, self).setUp()
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from .._discover import findMachinesViaWrapper
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self.findMachinesViaWrapper = findMachinesViaWrapper
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def test_yieldsMachine(self):
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"""
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When given a L{twisted.python.modules.PythonAttribute} that refers
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directly to a L{MethodicalMachine}, L{findMachinesViaWrapper}
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yields that machine and its FQPN.
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"""
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source = """\
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from automat import MethodicalMachine
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rootMachine = MethodicalMachine()
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"""
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moduleDict = self.makeModuleAsDict(source, self.pathDir, 'root.py')
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rootMachine = moduleDict['root.rootMachine']
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self.assertIn(('root.rootMachine', rootMachine.load()),
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list(self.findMachinesViaWrapper(rootMachine)))
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def test_yieldsMachineInClass(self):
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"""
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When given a L{twisted.python.modules.PythonAttribute} that refers
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to a class that contains a L{MethodicalMachine} as a class
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variable, L{findMachinesViaWrapper} yields that machine and
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its FQPN.
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"""
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source = """\
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from automat import MethodicalMachine
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class PythonClass(object):
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_classMachine = MethodicalMachine()
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"""
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moduleDict = self.makeModuleAsDict(source, self.pathDir, 'clsmod.py')
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PythonClass = moduleDict['clsmod.PythonClass']
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self.assertIn(('clsmod.PythonClass._classMachine',
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PythonClass.load()._classMachine),
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list(self.findMachinesViaWrapper(PythonClass)))
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def test_yieldsMachineInNestedClass(self):
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"""
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When given a L{twisted.python.modules.PythonAttribute} that refers
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to a nested class that contains a L{MethodicalMachine} as a
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class variable, L{findMachinesViaWrapper} yields that machine
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and its FQPN.
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"""
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source = """\
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from automat import MethodicalMachine
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class PythonClass(object):
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class NestedClass(object):
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_classMachine = MethodicalMachine()
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"""
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moduleDict = self.makeModuleAsDict(source,
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self.pathDir,
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'nestedcls.py')
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PythonClass = moduleDict['nestedcls.PythonClass']
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self.assertIn(('nestedcls.PythonClass.NestedClass._classMachine',
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PythonClass.load().NestedClass._classMachine),
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list(self.findMachinesViaWrapper(PythonClass)))
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def test_yieldsMachineInModule(self):
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"""
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When given a L{twisted.python.modules.PythonModule} that refers to
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a module that contains a L{MethodicalMachine},
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L{findMachinesViaWrapper} yields that machine and its FQPN.
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"""
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source = """\
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from automat import MethodicalMachine
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rootMachine = MethodicalMachine()
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"""
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module = self.makeModule(source, self.pathDir, 'root.py')
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rootMachine = self.loadModuleAsDict(module)['root.rootMachine'].load()
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self.assertIn(('root.rootMachine', rootMachine),
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list(self.findMachinesViaWrapper(module)))
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def test_yieldsMachineInClassInModule(self):
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"""
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When given a L{twisted.python.modules.PythonModule} that refers to
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the original module of a class containing a
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L{MethodicalMachine}, L{findMachinesViaWrapper} yields that
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machine and its FQPN.
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"""
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source = """\
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from automat import MethodicalMachine
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class PythonClass(object):
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_classMachine = MethodicalMachine()
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"""
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module = self.makeModule(source, self.pathDir, 'clsmod.py')
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PythonClass = self.loadModuleAsDict(
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module)['clsmod.PythonClass'].load()
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self.assertIn(('clsmod.PythonClass._classMachine',
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PythonClass._classMachine),
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list(self.findMachinesViaWrapper(module)))
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def test_yieldsMachineInNestedClassInModule(self):
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"""
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When given a L{twisted.python.modules.PythonModule} that refers to
|
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the original module of a nested class containing a
|
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L{MethodicalMachine}, L{findMachinesViaWrapper} yields that
|
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machine and its FQPN.
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"""
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source = """\
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from automat import MethodicalMachine
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class PythonClass(object):
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class NestedClass(object):
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_classMachine = MethodicalMachine()
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"""
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module = self.makeModule(source, self.pathDir, 'nestedcls.py')
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PythonClass = self.loadModuleAsDict(
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module)['nestedcls.PythonClass'].load()
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self.assertIn(('nestedcls.PythonClass.NestedClass._classMachine',
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PythonClass.NestedClass._classMachine),
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list(self.findMachinesViaWrapper(module)))
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def test_ignoresImportedClass(self):
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"""
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When given a L{twisted.python.modules.PythonAttribute} that refers
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to a class imported from another module, any
|
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L{MethodicalMachine}s on that class are ignored.
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|
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This behavior ensures that a machine is only discovered on a
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class when visiting the module where that class was defined.
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"""
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originalSource = """
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from automat import MethodicalMachine
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class PythonClass(object):
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_classMachine = MethodicalMachine()
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"""
|
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importingSource = """
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from original import PythonClass
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"""
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self.makeModule(originalSource, self.pathDir, 'original.py')
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importingModule = self.makeModule(importingSource,
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self.pathDir,
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'importing.py')
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|
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self.assertFalse(list(self.findMachinesViaWrapper(importingModule)))
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|
||||
def test_descendsIntoPackages(self):
|
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"""
|
||||
L{findMachinesViaWrapper} descends into packages to discover
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||||
machines.
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"""
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pythonPath = self.PythonPath([self.pathDir])
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package = self.FilePath(self.pathDir).child("test_package")
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package.makedirs()
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package.child('__init__.py').touch()
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|
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source = """
|
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from automat import MethodicalMachine
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|
||||
|
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class PythonClass(object):
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_classMachine = MethodicalMachine()
|
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|
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|
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rootMachine = MethodicalMachine()
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"""
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self.makeModule(source, package.path, 'module.py')
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test_package = pythonPath['test_package']
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machines = sorted(self.findMachinesViaWrapper(test_package),
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key=operator.itemgetter(0))
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moduleDict = self.loadModuleAsDict(test_package['module'])
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rootMachine = moduleDict['test_package.module.rootMachine'].load()
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PythonClass = moduleDict['test_package.module.PythonClass'].load()
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expectedMachines = sorted(
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[('test_package.module.rootMachine',
|
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rootMachine),
|
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('test_package.module.PythonClass._classMachine',
|
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PythonClass._classMachine)], key=operator.itemgetter(0))
|
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self.assertEqual(expectedMachines, machines)
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|
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def test_infiniteLoop(self):
|
||||
"""
|
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L{findMachinesViaWrapper} ignores infinite loops.
|
||||
|
||||
Note this test can't fail - it can only run forever!
|
||||
"""
|
||||
source = """
|
||||
class InfiniteLoop(object):
|
||||
pass
|
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|
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InfiniteLoop.loop = InfiniteLoop
|
||||
"""
|
||||
module = self.makeModule(source, self.pathDir, 'loop.py')
|
||||
self.assertFalse(list(self.findMachinesViaWrapper(module)))
|
||||
|
||||
|
||||
@skipIf(not isTwistedInstalled(), "Twisted is not installed.")
|
||||
class WrapFQPNTests(TestCase):
|
||||
"""
|
||||
Tests that ensure L{wrapFQPN} loads the
|
||||
L{twisted.python.modules.PythonModule} or
|
||||
L{twisted.python.modules.PythonAttribute} for a given FQPN.
|
||||
"""
|
||||
|
||||
def setUp(self):
|
||||
from twisted.python.modules import PythonModule, PythonAttribute
|
||||
from .._discover import wrapFQPN, InvalidFQPN, NoModule, NoObject
|
||||
|
||||
self.PythonModule = PythonModule
|
||||
self.PythonAttribute = PythonAttribute
|
||||
self.wrapFQPN = wrapFQPN
|
||||
self.InvalidFQPN = InvalidFQPN
|
||||
self.NoModule = NoModule
|
||||
self.NoObject = NoObject
|
||||
|
||||
def assertModuleWrapperRefersTo(self, moduleWrapper, module):
|
||||
"""
|
||||
Assert that a L{twisted.python.modules.PythonModule} refers to a
|
||||
particular Python module.
|
||||
"""
|
||||
self.assertIsInstance(moduleWrapper, self.PythonModule)
|
||||
self.assertEqual(moduleWrapper.name, module.__name__)
|
||||
self.assertIs(moduleWrapper.load(), module)
|
||||
|
||||
def assertAttributeWrapperRefersTo(self, attributeWrapper, fqpn, obj):
|
||||
"""
|
||||
Assert that a L{twisted.python.modules.PythonAttribute} refers to a
|
||||
particular Python object.
|
||||
"""
|
||||
self.assertIsInstance(attributeWrapper, self.PythonAttribute)
|
||||
self.assertEqual(attributeWrapper.name, fqpn)
|
||||
self.assertIs(attributeWrapper.load(), obj)
|
||||
|
||||
def test_failsWithEmptyFQPN(self):
|
||||
"""
|
||||
L{wrapFQPN} raises L{InvalidFQPN} when given an empty string.
|
||||
"""
|
||||
with self.assertRaises(self.InvalidFQPN):
|
||||
self.wrapFQPN('')
|
||||
|
||||
def test_failsWithBadDotting(self):
|
||||
""""
|
||||
L{wrapFQPN} raises L{InvalidFQPN} when given a badly-dotted
|
||||
FQPN. (e.g., x..y).
|
||||
"""
|
||||
for bad in ('.fails', 'fails.', 'this..fails'):
|
||||
with self.assertRaises(self.InvalidFQPN):
|
||||
self.wrapFQPN(bad)
|
||||
|
||||
def test_singleModule(self):
|
||||
"""
|
||||
L{wrapFQPN} returns a L{twisted.python.modules.PythonModule}
|
||||
referring to the single module a dotless FQPN describes.
|
||||
"""
|
||||
import os
|
||||
|
||||
moduleWrapper = self.wrapFQPN('os')
|
||||
|
||||
self.assertIsInstance(moduleWrapper, self.PythonModule)
|
||||
self.assertIs(moduleWrapper.load(), os)
|
||||
|
||||
def test_failsWithMissingSingleModuleOrPackage(self):
|
||||
"""
|
||||
L{wrapFQPN} raises L{NoModule} when given a dotless FQPN that does
|
||||
not refer to a module or package.
|
||||
"""
|
||||
with self.assertRaises(self.NoModule):
|
||||
self.wrapFQPN("this is not an acceptable name!")
|
||||
|
||||
def test_singlePackage(self):
|
||||
"""
|
||||
L{wrapFQPN} returns a L{twisted.python.modules.PythonModule}
|
||||
referring to the single package a dotless FQPN describes.
|
||||
"""
|
||||
import xml
|
||||
self.assertModuleWrapperRefersTo(self.wrapFQPN('xml'), xml)
|
||||
|
||||
def test_multiplePackages(self):
|
||||
"""
|
||||
L{wrapFQPN} returns a L{twisted.python.modules.PythonModule}
|
||||
referring to the deepest package described by dotted FQPN.
|
||||
"""
|
||||
import xml.etree
|
||||
self.assertModuleWrapperRefersTo(self.wrapFQPN('xml.etree'), xml.etree)
|
||||
|
||||
def test_multiplePackagesFinalModule(self):
|
||||
"""
|
||||
L{wrapFQPN} returns a L{twisted.python.modules.PythonModule}
|
||||
referring to the deepest module described by dotted FQPN.
|
||||
"""
|
||||
import xml.etree.ElementTree
|
||||
self.assertModuleWrapperRefersTo(
|
||||
self.wrapFQPN('xml.etree.ElementTree'), xml.etree.ElementTree)
|
||||
|
||||
def test_singleModuleObject(self):
|
||||
"""
|
||||
L{wrapFQPN} returns a L{twisted.python.modules.PythonAttribute}
|
||||
referring to the deepest object an FQPN names, traversing one module.
|
||||
"""
|
||||
import os
|
||||
self.assertAttributeWrapperRefersTo(
|
||||
self.wrapFQPN('os.path'), 'os.path', os.path)
|
||||
|
||||
def test_multiplePackagesObject(self):
|
||||
"""
|
||||
L{wrapFQPN} returns a L{twisted.python.modules.PythonAttribute}
|
||||
referring to the deepest object described by an FQPN,
|
||||
descending through several packages.
|
||||
"""
|
||||
import xml.etree.ElementTree
|
||||
import automat
|
||||
|
||||
for fqpn, obj in [('xml.etree.ElementTree.fromstring',
|
||||
xml.etree.ElementTree.fromstring),
|
||||
('automat.MethodicalMachine.__doc__',
|
||||
automat.MethodicalMachine.__doc__)]:
|
||||
self.assertAttributeWrapperRefersTo(
|
||||
self.wrapFQPN(fqpn), fqpn, obj)
|
||||
|
||||
def test_failsWithMultiplePackagesMissingModuleOrPackage(self):
|
||||
"""
|
||||
L{wrapFQPN} raises L{NoObject} when given an FQPN that contains a
|
||||
missing attribute, module, or package.
|
||||
"""
|
||||
for bad in ('xml.etree.nope!',
|
||||
'xml.etree.nope!.but.the.rest.is.believable'):
|
||||
with self.assertRaises(self.NoObject):
|
||||
self.wrapFQPN(bad)
|
||||
|
||||
|
||||
@skipIf(not isTwistedInstalled(), "Twisted is not installed.")
|
||||
class FindMachinesIntegrationTests(_WritesPythonModules):
|
||||
"""
|
||||
Integration tests to check that L{findMachines} yields all
|
||||
machines discoverable at or below an FQPN.
|
||||
"""
|
||||
|
||||
SOURCE = """
|
||||
from automat import MethodicalMachine
|
||||
|
||||
class PythonClass(object):
|
||||
_machine = MethodicalMachine()
|
||||
ignored = "i am ignored"
|
||||
|
||||
rootLevel = MethodicalMachine()
|
||||
|
||||
ignored = "i am ignored"
|
||||
"""
|
||||
|
||||
def setUp(self):
|
||||
super(FindMachinesIntegrationTests, self).setUp()
|
||||
from .._discover import findMachines
|
||||
|
||||
self.findMachines = findMachines
|
||||
|
||||
packageDir = self.FilePath(self.pathDir).child("test_package")
|
||||
packageDir.makedirs()
|
||||
self.pythonPath = self.PythonPath([self.pathDir])
|
||||
self.writeSourceInto(self.SOURCE, packageDir.path, '__init__.py')
|
||||
|
||||
subPackageDir = packageDir.child('subpackage')
|
||||
subPackageDir.makedirs()
|
||||
subPackageDir.child('__init__.py').touch()
|
||||
|
||||
self.makeModule(self.SOURCE, subPackageDir.path, 'module.py')
|
||||
|
||||
self.packageDict = self.loadModuleAsDict(
|
||||
self.pythonPath['test_package'])
|
||||
self.moduleDict = self.loadModuleAsDict(
|
||||
self.pythonPath['test_package']['subpackage']['module'])
|
||||
|
||||
def test_discoverAll(self):
|
||||
"""
|
||||
Given a top-level package FQPN, L{findMachines} discovers all
|
||||
L{MethodicalMachine} instances in and below it.
|
||||
"""
|
||||
machines = sorted(self.findMachines('test_package'),
|
||||
key=operator.itemgetter(0))
|
||||
|
||||
tpRootLevel = self.packageDict['test_package.rootLevel'].load()
|
||||
tpPythonClass = self.packageDict['test_package.PythonClass'].load()
|
||||
|
||||
mRLAttr = self.moduleDict['test_package.subpackage.module.rootLevel']
|
||||
mRootLevel = mRLAttr.load()
|
||||
mPCAttr = self.moduleDict['test_package.subpackage.module.PythonClass']
|
||||
mPythonClass = mPCAttr.load()
|
||||
|
||||
expectedMachines = sorted(
|
||||
[('test_package.rootLevel', tpRootLevel),
|
||||
('test_package.PythonClass._machine', tpPythonClass._machine),
|
||||
('test_package.subpackage.module.rootLevel', mRootLevel),
|
||||
('test_package.subpackage.module.PythonClass._machine',
|
||||
mPythonClass._machine)],
|
||||
key=operator.itemgetter(0))
|
||||
|
||||
self.assertEqual(expectedMachines, machines)
|
||||
@@ -0,0 +1,98 @@
|
||||
from unittest import TestCase
|
||||
from .._methodical import MethodicalMachine
|
||||
|
||||
class SampleObject(object):
|
||||
mm = MethodicalMachine()
|
||||
|
||||
@mm.state(initial=True)
|
||||
def begin(self):
|
||||
"initial state"
|
||||
@mm.state()
|
||||
def middle(self):
|
||||
"middle state"
|
||||
@mm.state()
|
||||
def end(self):
|
||||
"end state"
|
||||
|
||||
@mm.input()
|
||||
def go1(self):
|
||||
"sample input"
|
||||
@mm.input()
|
||||
def go2(self):
|
||||
"sample input"
|
||||
@mm.input()
|
||||
def back(self):
|
||||
"sample input"
|
||||
|
||||
@mm.output()
|
||||
def out(self):
|
||||
"sample output"
|
||||
|
||||
setTrace = mm._setTrace
|
||||
|
||||
begin.upon(go1, middle, [out])
|
||||
middle.upon(go2, end, [out])
|
||||
end.upon(back, middle, [])
|
||||
middle.upon(back, begin, [])
|
||||
|
||||
class TraceTests(TestCase):
|
||||
def test_only_inputs(self):
|
||||
traces = []
|
||||
def tracer(old_state, input, new_state):
|
||||
traces.append((old_state, input, new_state))
|
||||
return None # "I only care about inputs, not outputs"
|
||||
s = SampleObject()
|
||||
s.setTrace(tracer)
|
||||
|
||||
s.go1()
|
||||
self.assertEqual(traces, [("begin", "go1", "middle"),
|
||||
])
|
||||
|
||||
s.go2()
|
||||
self.assertEqual(traces, [("begin", "go1", "middle"),
|
||||
("middle", "go2", "end"),
|
||||
])
|
||||
s.setTrace(None)
|
||||
s.back()
|
||||
self.assertEqual(traces, [("begin", "go1", "middle"),
|
||||
("middle", "go2", "end"),
|
||||
])
|
||||
s.go2()
|
||||
self.assertEqual(traces, [("begin", "go1", "middle"),
|
||||
("middle", "go2", "end"),
|
||||
])
|
||||
|
||||
def test_inputs_and_outputs(self):
|
||||
traces = []
|
||||
def tracer(old_state, input, new_state):
|
||||
traces.append((old_state, input, new_state, None))
|
||||
def trace_outputs(output):
|
||||
traces.append((old_state, input, new_state, output))
|
||||
return trace_outputs # "I care about outputs too"
|
||||
s = SampleObject()
|
||||
s.setTrace(tracer)
|
||||
|
||||
s.go1()
|
||||
self.assertEqual(traces, [("begin", "go1", "middle", None),
|
||||
("begin", "go1", "middle", "out"),
|
||||
])
|
||||
|
||||
s.go2()
|
||||
self.assertEqual(traces, [("begin", "go1", "middle", None),
|
||||
("begin", "go1", "middle", "out"),
|
||||
("middle", "go2", "end", None),
|
||||
("middle", "go2", "end", "out"),
|
||||
])
|
||||
s.setTrace(None)
|
||||
s.back()
|
||||
self.assertEqual(traces, [("begin", "go1", "middle", None),
|
||||
("begin", "go1", "middle", "out"),
|
||||
("middle", "go2", "end", None),
|
||||
("middle", "go2", "end", "out"),
|
||||
])
|
||||
s.go2()
|
||||
self.assertEqual(traces, [("begin", "go1", "middle", None),
|
||||
("begin", "go1", "middle", "out"),
|
||||
("middle", "go2", "end", None),
|
||||
("middle", "go2", "end", "out"),
|
||||
])
|
||||
@@ -0,0 +1,430 @@
|
||||
from __future__ import print_function
|
||||
import functools
|
||||
|
||||
import os
|
||||
import subprocess
|
||||
from unittest import TestCase, skipIf
|
||||
|
||||
import attr
|
||||
|
||||
from .._methodical import MethodicalMachine
|
||||
|
||||
from .test_discover import isTwistedInstalled
|
||||
|
||||
|
||||
def isGraphvizModuleInstalled():
|
||||
"""
|
||||
Is the graphviz Python module installed?
|
||||
"""
|
||||
try:
|
||||
__import__("graphviz")
|
||||
except ImportError:
|
||||
return False
|
||||
else:
|
||||
return True
|
||||
|
||||
|
||||
def isGraphvizInstalled():
|
||||
"""
|
||||
Are the graphviz tools installed?
|
||||
"""
|
||||
r, w = os.pipe()
|
||||
os.close(w)
|
||||
try:
|
||||
return not subprocess.call("dot", stdin=r, shell=True)
|
||||
finally:
|
||||
os.close(r)
|
||||
|
||||
|
||||
|
||||
def sampleMachine():
|
||||
"""
|
||||
Create a sample L{MethodicalMachine} with some sample states.
|
||||
"""
|
||||
mm = MethodicalMachine()
|
||||
class SampleObject(object):
|
||||
@mm.state(initial=True)
|
||||
def begin(self):
|
||||
"initial state"
|
||||
@mm.state()
|
||||
def end(self):
|
||||
"end state"
|
||||
@mm.input()
|
||||
def go(self):
|
||||
"sample input"
|
||||
@mm.output()
|
||||
def out(self):
|
||||
"sample output"
|
||||
begin.upon(go, end, [out])
|
||||
so = SampleObject()
|
||||
so.go()
|
||||
return mm
|
||||
|
||||
|
||||
@skipIf(not isGraphvizModuleInstalled(), "Graphviz module is not installed.")
|
||||
class ElementMakerTests(TestCase):
|
||||
"""
|
||||
L{elementMaker} generates HTML representing the specified element.
|
||||
"""
|
||||
|
||||
def setUp(self):
|
||||
from .._visualize import elementMaker
|
||||
self.elementMaker = elementMaker
|
||||
|
||||
def test_sortsAttrs(self):
|
||||
"""
|
||||
L{elementMaker} orders HTML attributes lexicographically.
|
||||
"""
|
||||
expected = r'<div a="1" b="2" c="3"></div>'
|
||||
self.assertEqual(expected,
|
||||
self.elementMaker("div",
|
||||
b='2',
|
||||
a='1',
|
||||
c='3'))
|
||||
|
||||
def test_quotesAttrs(self):
|
||||
"""
|
||||
L{elementMaker} quotes HTML attributes according to DOT's quoting rule.
|
||||
|
||||
See U{http://www.graphviz.org/doc/info/lang.html}, footnote 1.
|
||||
"""
|
||||
expected = r'<div a="1" b="a \" quote" c="a string"></div>'
|
||||
self.assertEqual(expected,
|
||||
self.elementMaker("div",
|
||||
b='a " quote',
|
||||
a=1,
|
||||
c="a string"))
|
||||
|
||||
def test_noAttrs(self):
|
||||
"""
|
||||
L{elementMaker} should render an element with no attributes.
|
||||
"""
|
||||
expected = r'<div ></div>'
|
||||
self.assertEqual(expected, self.elementMaker("div"))
|
||||
|
||||
|
||||
@attr.s
|
||||
class HTMLElement(object):
|
||||
"""Holds an HTML element, as created by elementMaker."""
|
||||
name = attr.ib()
|
||||
children = attr.ib()
|
||||
attributes = attr.ib()
|
||||
|
||||
|
||||
def findElements(element, predicate):
|
||||
"""
|
||||
Recursively collect all elements in an L{HTMLElement} tree that
|
||||
match the optional predicate.
|
||||
"""
|
||||
if predicate(element):
|
||||
return [element]
|
||||
elif isLeaf(element):
|
||||
return []
|
||||
|
||||
return [result
|
||||
for child in element.children
|
||||
for result in findElements(child, predicate)]
|
||||
|
||||
|
||||
def isLeaf(element):
|
||||
"""
|
||||
This HTML element is actually leaf node.
|
||||
"""
|
||||
return not isinstance(element, HTMLElement)
|
||||
|
||||
|
||||
@skipIf(not isGraphvizModuleInstalled(), "Graphviz module is not installed.")
|
||||
class TableMakerTests(TestCase):
|
||||
"""
|
||||
Tests that ensure L{tableMaker} generates HTML tables usable as
|
||||
labels in DOT graphs.
|
||||
|
||||
For more information, read the "HTML-Like Labels" section of
|
||||
U{http://www.graphviz.org/doc/info/shapes.html}.
|
||||
"""
|
||||
|
||||
def fakeElementMaker(self, name, *children, **attributes):
|
||||
return HTMLElement(name=name, children=children, attributes=attributes)
|
||||
|
||||
def setUp(self):
|
||||
from .._visualize import tableMaker
|
||||
|
||||
self.inputLabel = "input label"
|
||||
self.port = "the port"
|
||||
self.tableMaker = functools.partial(tableMaker,
|
||||
_E=self.fakeElementMaker)
|
||||
|
||||
def test_inputLabelRow(self):
|
||||
"""
|
||||
The table returned by L{tableMaker} always contains the input
|
||||
symbol label in its first row, and that row contains one cell
|
||||
with a port attribute set to the provided port.
|
||||
"""
|
||||
|
||||
def hasPort(element):
|
||||
return (not isLeaf(element)
|
||||
and element.attributes.get("port") == self.port)
|
||||
|
||||
for outputLabels in ([], ["an output label"]):
|
||||
table = self.tableMaker(self.inputLabel, outputLabels,
|
||||
port=self.port)
|
||||
self.assertGreater(len(table.children), 0)
|
||||
inputLabelRow = table.children[0]
|
||||
|
||||
portCandidates = findElements(table, hasPort)
|
||||
|
||||
self.assertEqual(len(portCandidates), 1)
|
||||
self.assertEqual(portCandidates[0].name, "td")
|
||||
self.assertEqual(findElements(inputLabelRow, isLeaf),
|
||||
[self.inputLabel])
|
||||
|
||||
def test_noOutputLabels(self):
|
||||
"""
|
||||
L{tableMaker} does not add a colspan attribute to the input
|
||||
label's cell or a second row if there no output labels.
|
||||
"""
|
||||
table = self.tableMaker("input label", (), port=self.port)
|
||||
self.assertEqual(len(table.children), 1)
|
||||
(inputLabelRow,) = table.children
|
||||
self.assertNotIn("colspan", inputLabelRow.attributes)
|
||||
|
||||
def test_withOutputLabels(self):
|
||||
"""
|
||||
L{tableMaker} adds a colspan attribute to the input label's cell
|
||||
equal to the number of output labels and a second row that
|
||||
contains the output labels.
|
||||
"""
|
||||
table = self.tableMaker(self.inputLabel, ("output label 1",
|
||||
"output label 2"),
|
||||
port=self.port)
|
||||
|
||||
self.assertEqual(len(table.children), 2)
|
||||
inputRow, outputRow = table.children
|
||||
|
||||
def hasCorrectColspan(element):
|
||||
return (not isLeaf(element)
|
||||
and element.name == "td"
|
||||
and element.attributes.get('colspan') == "2")
|
||||
|
||||
self.assertEqual(len(findElements(inputRow, hasCorrectColspan)),
|
||||
1)
|
||||
self.assertEqual(findElements(outputRow, isLeaf), ["output label 1",
|
||||
"output label 2"])
|
||||
|
||||
|
||||
@skipIf(not isGraphvizModuleInstalled(), "Graphviz module is not installed.")
|
||||
@skipIf(not isGraphvizInstalled(), "Graphviz tools are not installed.")
|
||||
class IntegrationTests(TestCase):
|
||||
"""
|
||||
Tests which make sure Graphviz can understand the output produced by
|
||||
Automat.
|
||||
"""
|
||||
|
||||
def test_validGraphviz(self):
|
||||
"""
|
||||
L{graphviz} emits valid graphviz data.
|
||||
"""
|
||||
p = subprocess.Popen("dot", stdin=subprocess.PIPE,
|
||||
stdout=subprocess.PIPE)
|
||||
out, err = p.communicate("".join(sampleMachine().asDigraph())
|
||||
.encode("utf-8"))
|
||||
self.assertEqual(p.returncode, 0)
|
||||
|
||||
|
||||
@skipIf(not isGraphvizModuleInstalled(), "Graphviz module is not installed.")
|
||||
class SpotChecks(TestCase):
|
||||
"""
|
||||
Tests to make sure that the output contains salient features of the machine
|
||||
being generated.
|
||||
"""
|
||||
|
||||
def test_containsMachineFeatures(self):
|
||||
"""
|
||||
The output of L{graphviz} should contain the names of the states,
|
||||
inputs, outputs in the state machine.
|
||||
"""
|
||||
gvout = "".join(sampleMachine().asDigraph())
|
||||
self.assertIn("begin", gvout)
|
||||
self.assertIn("end", gvout)
|
||||
self.assertIn("go", gvout)
|
||||
self.assertIn("out", gvout)
|
||||
|
||||
|
||||
class RecordsDigraphActions(object):
|
||||
"""
|
||||
Records calls made to L{FakeDigraph}.
|
||||
"""
|
||||
|
||||
def __init__(self):
|
||||
self.reset()
|
||||
|
||||
def reset(self):
|
||||
self.renderCalls = []
|
||||
self.saveCalls = []
|
||||
|
||||
|
||||
class FakeDigraph(object):
|
||||
"""
|
||||
A fake L{graphviz.Digraph}. Instantiate it with a
|
||||
L{RecordsDigraphActions}.
|
||||
"""
|
||||
|
||||
def __init__(self, recorder):
|
||||
self._recorder = recorder
|
||||
|
||||
def render(self, **kwargs):
|
||||
self._recorder.renderCalls.append(kwargs)
|
||||
|
||||
def save(self, **kwargs):
|
||||
self._recorder.saveCalls.append(kwargs)
|
||||
|
||||
|
||||
class FakeMethodicalMachine(object):
|
||||
"""
|
||||
A fake L{MethodicalMachine}. Instantiate it with a L{FakeDigraph}
|
||||
"""
|
||||
|
||||
def __init__(self, digraph):
|
||||
self._digraph = digraph
|
||||
|
||||
def asDigraph(self):
|
||||
return self._digraph
|
||||
|
||||
|
||||
@skipIf(not isGraphvizModuleInstalled(), "Graphviz module is not installed.")
|
||||
@skipIf(not isGraphvizInstalled(), "Graphviz tools are not installed.")
|
||||
@skipIf(not isTwistedInstalled(), "Twisted is not installed.")
|
||||
class VisualizeToolTests(TestCase):
|
||||
|
||||
def setUp(self):
|
||||
self.digraphRecorder = RecordsDigraphActions()
|
||||
self.fakeDigraph = FakeDigraph(self.digraphRecorder)
|
||||
|
||||
self.fakeProgname = 'tool-test'
|
||||
self.fakeSysPath = ['ignored']
|
||||
self.collectedOutput = []
|
||||
self.fakeFQPN = 'fake.fqpn'
|
||||
|
||||
def collectPrints(self, *args):
|
||||
self.collectedOutput.append(' '.join(args))
|
||||
|
||||
def fakeFindMachines(self, fqpn):
|
||||
yield fqpn, FakeMethodicalMachine(self.fakeDigraph)
|
||||
|
||||
def tool(self,
|
||||
progname=None,
|
||||
argv=None,
|
||||
syspath=None,
|
||||
findMachines=None,
|
||||
print=None):
|
||||
from .._visualize import tool
|
||||
return tool(
|
||||
_progname=progname or self.fakeProgname,
|
||||
_argv=argv or [self.fakeFQPN],
|
||||
_syspath=syspath or self.fakeSysPath,
|
||||
_findMachines=findMachines or self.fakeFindMachines,
|
||||
_print=print or self.collectPrints)
|
||||
|
||||
def test_checksCurrentDirectory(self):
|
||||
"""
|
||||
L{tool} adds '' to sys.path to ensure
|
||||
L{automat._discover.findMachines} searches the current
|
||||
directory.
|
||||
"""
|
||||
self.tool(argv=[self.fakeFQPN])
|
||||
self.assertEqual(self.fakeSysPath[0], '')
|
||||
|
||||
def test_quietHidesOutput(self):
|
||||
"""
|
||||
Passing -q/--quiet hides all output.
|
||||
"""
|
||||
self.tool(argv=[self.fakeFQPN, '--quiet'])
|
||||
self.assertFalse(self.collectedOutput)
|
||||
self.tool(argv=[self.fakeFQPN, '-q'])
|
||||
self.assertFalse(self.collectedOutput)
|
||||
|
||||
def test_onlySaveDot(self):
|
||||
"""
|
||||
Passing an empty string for --image-directory/-i disables
|
||||
rendering images.
|
||||
"""
|
||||
for arg in ('--image-directory', '-i'):
|
||||
self.digraphRecorder.reset()
|
||||
self.collectedOutput = []
|
||||
|
||||
self.tool(argv=[self.fakeFQPN, arg, ''])
|
||||
self.assertFalse(any("image" in line
|
||||
for line in self.collectedOutput))
|
||||
|
||||
self.assertEqual(len(self.digraphRecorder.saveCalls), 1)
|
||||
(call,) = self.digraphRecorder.saveCalls
|
||||
self.assertEqual("{}.dot".format(self.fakeFQPN),
|
||||
call['filename'])
|
||||
|
||||
self.assertFalse(self.digraphRecorder.renderCalls)
|
||||
|
||||
def test_saveOnlyImage(self):
|
||||
"""
|
||||
Passing an empty string for --dot-directory/-d disables saving dot
|
||||
files.
|
||||
"""
|
||||
for arg in ('--dot-directory', '-d'):
|
||||
self.digraphRecorder.reset()
|
||||
self.collectedOutput = []
|
||||
self.tool(argv=[self.fakeFQPN, arg, ''])
|
||||
|
||||
self.assertFalse(any("dot" in line
|
||||
for line in self.collectedOutput))
|
||||
|
||||
self.assertEqual(len(self.digraphRecorder.renderCalls), 1)
|
||||
(call,) = self.digraphRecorder.renderCalls
|
||||
self.assertEqual("{}.dot".format(self.fakeFQPN),
|
||||
call['filename'])
|
||||
self.assertTrue(call['cleanup'])
|
||||
|
||||
self.assertFalse(self.digraphRecorder.saveCalls)
|
||||
|
||||
def test_saveDotAndImagesInDifferentDirectories(self):
|
||||
"""
|
||||
Passing different directories to --image-directory and --dot-directory
|
||||
writes images and dot files to those directories.
|
||||
"""
|
||||
imageDirectory = 'image'
|
||||
dotDirectory = 'dot'
|
||||
self.tool(argv=[self.fakeFQPN,
|
||||
'--image-directory', imageDirectory,
|
||||
'--dot-directory', dotDirectory])
|
||||
|
||||
self.assertTrue(any("image" in line
|
||||
for line in self.collectedOutput))
|
||||
self.assertTrue(any("dot" in line
|
||||
for line in self.collectedOutput))
|
||||
|
||||
self.assertEqual(len(self.digraphRecorder.renderCalls), 1)
|
||||
(renderCall,) = self.digraphRecorder.renderCalls
|
||||
self.assertEqual(renderCall["directory"], imageDirectory)
|
||||
self.assertTrue(renderCall['cleanup'])
|
||||
|
||||
self.assertEqual(len(self.digraphRecorder.saveCalls), 1)
|
||||
(saveCall,) = self.digraphRecorder.saveCalls
|
||||
self.assertEqual(saveCall["directory"], dotDirectory)
|
||||
|
||||
def test_saveDotAndImagesInSameDirectory(self):
|
||||
"""
|
||||
Passing the same directory to --image-directory and --dot-directory
|
||||
writes images and dot files to that one directory.
|
||||
"""
|
||||
directory = 'imagesAndDot'
|
||||
self.tool(argv=[self.fakeFQPN,
|
||||
'--image-directory', directory,
|
||||
'--dot-directory', directory])
|
||||
|
||||
self.assertTrue(any("image and dot" in line
|
||||
for line in self.collectedOutput))
|
||||
|
||||
self.assertEqual(len(self.digraphRecorder.renderCalls), 1)
|
||||
(renderCall,) = self.digraphRecorder.renderCalls
|
||||
self.assertEqual(renderCall["directory"], directory)
|
||||
self.assertFalse(renderCall['cleanup'])
|
||||
|
||||
self.assertFalse(len(self.digraphRecorder.saveCalls))
|
||||
Reference in New Issue
Block a user