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- # Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
- # Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
- # For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
-
- import unittest
- import xml
-
- import six
-
- import astroid
- from astroid import builder
- from astroid import exceptions
- from astroid import MANAGER
- from astroid import test_utils
- from astroid import objects
-
-
- BUILTINS = MANAGER.astroid_cache[six.moves.builtins.__name__]
-
-
- class InstanceModelTest(unittest.TestCase):
-
- def test_instance_special_model(self):
- ast_nodes = builder.extract_node('''
- class A:
- "test"
- def __init__(self):
- self.a = 42
- a = A()
- a.__class__ #@
- a.__module__ #@
- a.__doc__ #@
- a.__dict__ #@
- ''', module_name='fake_module')
-
- cls = next(ast_nodes[0].infer())
- self.assertIsInstance(cls, astroid.ClassDef)
- self.assertEqual(cls.name, 'A')
-
- module = next(ast_nodes[1].infer())
- self.assertIsInstance(module, astroid.Const)
- self.assertEqual(module.value, 'fake_module')
-
- doc = next(ast_nodes[2].infer())
- self.assertIsInstance(doc, astroid.Const)
- self.assertEqual(doc.value, 'test')
-
- dunder_dict = next(ast_nodes[3].infer())
- self.assertIsInstance(dunder_dict, astroid.Dict)
- attr = next(dunder_dict.getitem(astroid.Const('a')).infer())
- self.assertIsInstance(attr, astroid.Const)
- self.assertEqual(attr.value, 42)
-
- @unittest.expectedFailure
- def test_instance_local_attributes_overrides_object_model(self):
- # The instance lookup needs to be changed in order for this to work.
- ast_node = builder.extract_node('''
- class A:
- @property
- def __dict__(self):
- return []
- A().__dict__
- ''')
- inferred = next(ast_node.infer())
- self.assertIsInstance(inferred, astroid.List)
- self.assertEqual(inferred.elts, [])
-
-
- class BoundMethodModelTest(unittest.TestCase):
-
- def test_bound_method_model(self):
- ast_nodes = builder.extract_node('''
- class A:
- def test(self): pass
- a = A()
- a.test.__func__ #@
- a.test.__self__ #@
- ''')
-
- func = next(ast_nodes[0].infer())
- self.assertIsInstance(func, astroid.FunctionDef)
- self.assertEqual(func.name, 'test')
-
- self_ = next(ast_nodes[1].infer())
- self.assertIsInstance(self_, astroid.Instance)
- self.assertEqual(self_.name, 'A')
-
-
- class UnboundMethodModelTest(unittest.TestCase):
-
- def test_unbound_method_model(self):
- ast_nodes = builder.extract_node('''
- class A:
- def test(self): pass
- t = A.test
- t.__class__ #@
- t.__func__ #@
- t.__self__ #@
- t.im_class #@
- t.im_func #@
- t.im_self #@
- ''')
-
- cls = next(ast_nodes[0].infer())
- self.assertIsInstance(cls, astroid.ClassDef)
- if six.PY2:
- unbound_name = 'instancemethod'
- else:
- unbound_name = 'function'
-
- self.assertEqual(cls.name, unbound_name)
-
- func = next(ast_nodes[1].infer())
- self.assertIsInstance(func, astroid.FunctionDef)
- self.assertEqual(func.name, 'test')
-
- self_ = next(ast_nodes[2].infer())
- self.assertIsInstance(self_, astroid.Const)
- self.assertIsNone(self_.value)
-
- self.assertEqual(cls.name, next(ast_nodes[3].infer()).name)
- self.assertEqual(func, next(ast_nodes[4].infer()))
- self.assertIsNone(next(ast_nodes[5].infer()).value)
-
-
- class ClassModelTest(unittest.TestCase):
-
- def test_priority_to_local_defined_values(self):
- ast_node = builder.extract_node('''
- class A:
- __doc__ = "first"
- A.__doc__ #@
- ''')
- inferred = next(ast_node.infer())
- self.assertIsInstance(inferred, astroid.Const)
- self.assertEqual(inferred.value, "first")
-
- @test_utils.require_version(maxver='3.0')
- def test__mro__old_style(self):
- ast_node = builder.extract_node('''
- class A:
- pass
- A.__mro__
- ''')
- with self.assertRaises(exceptions.InferenceError):
- next(ast_node.infer())
-
- @test_utils.require_version(maxver='3.0')
- def test__subclasses__old_style(self):
- ast_node = builder.extract_node('''
- class A:
- pass
- A.__subclasses__
- ''')
- with self.assertRaises(exceptions.InferenceError):
- next(ast_node.infer())
-
- def test_class_model_correct_mro_subclasses_proxied(self):
- ast_nodes = builder.extract_node('''
- class A(object):
- pass
- A.mro #@
- A.__subclasses__ #@
- ''')
- for node in ast_nodes:
- inferred = next(node.infer())
- self.assertIsInstance(inferred, astroid.BoundMethod)
- self.assertIsInstance(inferred._proxied, astroid.FunctionDef)
- self.assertIsInstance(inferred.bound, astroid.ClassDef)
- self.assertEqual(inferred.bound.name, 'type')
-
- @unittest.skipUnless(six.PY2, "Needs old style classes")
- def test_old_style_classes_no_mro(self):
- ast_node = builder.extract_node('''
- class A:
- pass
- A.mro #@
- ''')
- with self.assertRaises(exceptions.InferenceError):
- next(ast_node.infer())
-
- def test_class_model(self):
- ast_nodes = builder.extract_node('''
- class A(object):
- "test"
-
- class B(A): pass
- class C(A): pass
-
- A.__module__ #@
- A.__name__ #@
- A.__qualname__ #@
- A.__doc__ #@
- A.__mro__ #@
- A.mro() #@
- A.__bases__ #@
- A.__class__ #@
- A.__dict__ #@
- A.__subclasses__() #@
- ''', module_name='fake_module')
-
- module = next(ast_nodes[0].infer())
- self.assertIsInstance(module, astroid.Const)
- self.assertEqual(module.value, 'fake_module')
-
- name = next(ast_nodes[1].infer())
- self.assertIsInstance(name, astroid.Const)
- self.assertEqual(name.value, 'A')
-
- qualname = next(ast_nodes[2].infer())
- self.assertIsInstance(qualname, astroid.Const)
- self.assertEqual(qualname.value, 'fake_module.A')
-
- doc = next(ast_nodes[3].infer())
- self.assertIsInstance(doc, astroid.Const)
- self.assertEqual(doc.value, 'test')
-
- mro = next(ast_nodes[4].infer())
- self.assertIsInstance(mro, astroid.Tuple)
- self.assertEqual([cls.name for cls in mro.elts],
- ['A', 'object'])
-
- called_mro = next(ast_nodes[5].infer())
- self.assertEqual(called_mro.elts, mro.elts)
-
- bases = next(ast_nodes[6].infer())
- self.assertIsInstance(bases, astroid.Tuple)
- self.assertEqual([cls.name for cls in bases.elts],
- ['object'])
-
- cls = next(ast_nodes[7].infer())
- self.assertIsInstance(cls, astroid.ClassDef)
- self.assertEqual(cls.name, 'type')
-
- cls_dict = next(ast_nodes[8].infer())
- self.assertIsInstance(cls_dict, astroid.Dict)
-
- subclasses = next(ast_nodes[9].infer())
- self.assertIsInstance(subclasses, astroid.List)
- self.assertEqual([cls.name for cls in subclasses.elts], ['B', 'C'])
-
-
- class ModuleModelTest(unittest.TestCase):
-
- def test_priority_to_local_defined_values(self):
- ast_node = astroid.parse('''
- __file__ = "mine"
- ''')
- file_value = next(ast_node.igetattr('__file__'))
- self.assertIsInstance(file_value, astroid.Const)
- self.assertEqual(file_value.value, "mine")
-
- def test__path__not_a_package(self):
- ast_node = builder.extract_node('''
- import sys
- sys.__path__ #@
- ''')
- with self.assertRaises(exceptions.InferenceError):
- next(ast_node.infer())
-
- def test_module_model(self):
- ast_nodes = builder.extract_node('''
- import xml
- xml.__path__ #@
- xml.__name__ #@
- xml.__doc__ #@
- xml.__file__ #@
- xml.__spec__ #@
- xml.__loader__ #@
- xml.__cached__ #@
- xml.__package__ #@
- xml.__dict__ #@
- ''')
-
- path = next(ast_nodes[0].infer())
- self.assertIsInstance(path, astroid.List)
- self.assertIsInstance(path.elts[0], astroid.Const)
- self.assertEqual(path.elts[0].value, xml.__path__[0])
-
- name = next(ast_nodes[1].infer())
- self.assertIsInstance(name, astroid.Const)
- self.assertEqual(name.value, 'xml')
-
- doc = next(ast_nodes[2].infer())
- self.assertIsInstance(doc, astroid.Const)
- self.assertEqual(doc.value, xml.__doc__)
-
- file_ = next(ast_nodes[3].infer())
- self.assertIsInstance(file_, astroid.Const)
- self.assertEqual(file_.value, xml.__file__.replace(".pyc", ".py"))
-
- for ast_node in ast_nodes[4:7]:
- inferred = next(ast_node.infer())
- self.assertIs(inferred, astroid.Uninferable)
-
- package = next(ast_nodes[7].infer())
- self.assertIsInstance(package, astroid.Const)
- self.assertEqual(package.value, 'xml')
-
- dict_ = next(ast_nodes[8].infer())
- self.assertIsInstance(dict_, astroid.Dict)
-
-
- class FunctionModelTest(unittest.TestCase):
-
- def test_partial_descriptor_support(self):
- bound, result = builder.extract_node('''
- class A(object): pass
- def test(self): return 42
- f = test.__get__(A(), A)
- f #@
- f() #@
- ''')
- bound = next(bound.infer())
- self.assertIsInstance(bound, astroid.BoundMethod)
- self.assertEqual(bound._proxied._proxied.name, 'test')
- result = next(result.infer())
- self.assertIsInstance(result, astroid.Const)
- self.assertEqual(result.value, 42)
-
- @unittest.expectedFailure
- def test_descriptor_not_inferrring_self(self):
- # We can't infer __get__(X, Y)() when the bounded function
- # uses self, because of the tree's parent not being propagating good enough.
- result = builder.extract_node('''
- class A(object):
- x = 42
- def test(self): return self.x
- f = test.__get__(A(), A)
- f() #@
- ''')
- result = next(result.infer())
- self.assertIsInstance(result, astroid.Const)
- self.assertEqual(result.value, 42)
-
- def test_descriptors_binding_invalid(self):
- ast_nodes = builder.extract_node('''
- class A: pass
- def test(self): return 42
- test.__get__()() #@
- test.__get__(1)() #@
- test.__get__(2, 3, 4) #@
- ''')
- for node in ast_nodes:
- with self.assertRaises(exceptions.InferenceError):
- next(node.infer())
-
- def test_function_model(self):
- ast_nodes = builder.extract_node('''
- def func(a=1, b=2):
- """test"""
- func.__name__ #@
- func.__doc__ #@
- func.__qualname__ #@
- func.__module__ #@
- func.__defaults__ #@
- func.__dict__ #@
- func.__globals__ #@
- func.__code__ #@
- func.__closure__ #@
- ''', module_name='fake_module')
-
- name = next(ast_nodes[0].infer())
- self.assertIsInstance(name, astroid.Const)
- self.assertEqual(name.value, 'func')
-
- doc = next(ast_nodes[1].infer())
- self.assertIsInstance(doc, astroid.Const)
- self.assertEqual(doc.value, 'test')
-
- qualname = next(ast_nodes[2].infer())
- self.assertIsInstance(qualname, astroid.Const)
- self.assertEqual(qualname.value, 'fake_module.func')
-
- module = next(ast_nodes[3].infer())
- self.assertIsInstance(module, astroid.Const)
- self.assertEqual(module.value, 'fake_module')
-
- defaults = next(ast_nodes[4].infer())
- self.assertIsInstance(defaults, astroid.Tuple)
- self.assertEqual([default.value for default in defaults.elts], [1, 2])
-
- dict_ = next(ast_nodes[5].infer())
- self.assertIsInstance(dict_, astroid.Dict)
-
- globals_ = next(ast_nodes[6].infer())
- self.assertIsInstance(globals_, astroid.Dict)
-
- for ast_node in ast_nodes[7:9]:
- self.assertIs(next(ast_node.infer()), astroid.Uninferable)
-
- @test_utils.require_version(minver='3.0')
- def test_empty_return_annotation(self):
- ast_node = builder.extract_node('''
- def test(): pass
- test.__annotations__
- ''')
- annotations = next(ast_node.infer())
- self.assertIsInstance(annotations, astroid.Dict)
- self.assertEqual(len(annotations.items), 0)
-
- @test_utils.require_version(minver='3.0')
- def test_builtin_dunder_init_does_not_crash_when_accessing_annotations(self):
- ast_node = builder.extract_node('''
- class Class:
- @classmethod
- def class_method(cls):
- cls.__init__.__annotations__ #@
- ''')
- inferred = next(ast_node.infer())
- self.assertIsInstance(inferred, astroid.Dict)
- self.assertEqual(len(inferred.items), 0)
-
- @test_utils.require_version(minver='3.0')
- def test_annotations_kwdefaults(self):
- ast_node = builder.extract_node('''
- def test(a: 1, *args: 2, f:4='lala', **kwarg:3)->2: pass
- test.__annotations__ #@
- test.__kwdefaults__ #@
- ''')
- annotations = next(ast_node[0].infer())
- self.assertIsInstance(annotations, astroid.Dict)
- self.assertIsInstance(annotations.getitem(astroid.Const('return')), astroid.Const)
- self.assertEqual(annotations.getitem(astroid.Const('return')).value, 2)
- self.assertIsInstance(annotations.getitem(astroid.Const('a')), astroid.Const)
- self.assertEqual(annotations.getitem(astroid.Const('a')).value, 1)
- self.assertEqual(annotations.getitem(astroid.Const('args')).value, 2)
- self.assertEqual(annotations.getitem(astroid.Const('kwarg')).value, 3)
-
- self.assertEqual(annotations.getitem(astroid.Const('f')).value, 4)
-
- kwdefaults = next(ast_node[1].infer())
- self.assertIsInstance(kwdefaults, astroid.Dict)
- # self.assertEqual(kwdefaults.getitem('f').value, 'lala')
-
- @test_utils.require_version(maxver='3.0')
- def test_function_model_for_python2(self):
- ast_nodes = builder.extract_node('''
- def test(a=1):
- "a"
-
- test.func_name #@
- test.func_doc #@
- test.func_dict #@
- test.func_globals #@
- test.func_defaults #@
- test.func_code #@
- test.func_closure #@
- ''')
- name = next(ast_nodes[0].infer())
- self.assertIsInstance(name, astroid.Const)
- self.assertEqual(name.value, 'test')
- doc = next(ast_nodes[1].infer())
- self.assertIsInstance(doc, astroid.Const)
- self.assertEqual(doc.value, 'a')
- pydict = next(ast_nodes[2].infer())
- self.assertIsInstance(pydict, astroid.Dict)
- pyglobals = next(ast_nodes[3].infer())
- self.assertIsInstance(pyglobals, astroid.Dict)
- defaults = next(ast_nodes[4].infer())
- self.assertIsInstance(defaults, astroid.Tuple)
- for node in ast_nodes[5:]:
- self.assertIs(next(node.infer()), astroid.Uninferable)
-
-
- class GeneratorModelTest(unittest.TestCase):
-
- def test_model(self):
- ast_nodes = builder.extract_node('''
- def test():
- "a"
- yield
-
- gen = test()
- gen.__name__ #@
- gen.__doc__ #@
- gen.gi_code #@
- gen.gi_frame #@
- gen.send #@
- ''')
-
- name = next(ast_nodes[0].infer())
- self.assertEqual(name.value, 'test')
-
- doc = next(ast_nodes[1].infer())
- self.assertEqual(doc.value, 'a')
-
- gi_code = next(ast_nodes[2].infer())
- self.assertIsInstance(gi_code, astroid.ClassDef)
- self.assertEqual(gi_code.name, 'gi_code')
-
- gi_frame = next(ast_nodes[3].infer())
- self.assertIsInstance(gi_frame, astroid.ClassDef)
- self.assertEqual(gi_frame.name, 'gi_frame')
-
- send = next(ast_nodes[4].infer())
- self.assertIsInstance(send, astroid.BoundMethod)
-
-
- class ExceptionModelTest(unittest.TestCase):
-
- @unittest.skipIf(six.PY2, "needs Python 3")
- def test_model_py3(self):
- ast_nodes = builder.extract_node('''
- try:
- x[42]
- except ValueError as err:
- err.args #@
- err.__traceback__ #@
-
- err.message #@
- ''')
- args = next(ast_nodes[0].infer())
- self.assertIsInstance(args, astroid.Tuple)
- tb = next(ast_nodes[1].infer())
- self.assertIsInstance(tb, astroid.Instance)
- self.assertEqual(tb.name, 'traceback')
-
- with self.assertRaises(exceptions.InferenceError):
- next(ast_nodes[2].infer())
-
- @unittest.skipUnless(six.PY2, "needs Python 2")
- def test_model_py2(self):
- ast_nodes = builder.extract_node('''
- try:
- x[42]
- except ValueError as err:
- err.args #@
- err.message #@
-
- err.__traceback__ #@
- ''')
- args = next(ast_nodes[0].infer())
- self.assertIsInstance(args, astroid.Tuple)
- message = next(ast_nodes[1].infer())
- self.assertIsInstance(message, astroid.Const)
-
- with self.assertRaises(exceptions.InferenceError):
- next(ast_nodes[2].infer())
-
-
- class DictObjectModelTest(unittest.TestCase):
-
- def test__class__(self):
- ast_node = builder.extract_node('{}.__class__')
- inferred = next(ast_node.infer())
- self.assertIsInstance(inferred, astroid.ClassDef)
- self.assertEqual(inferred.name, 'dict')
-
- def test_attributes_inferred_as_methods(self):
- ast_nodes = builder.extract_node('''
- {}.values #@
- {}.items #@
- {}.keys #@
- ''')
- for node in ast_nodes:
- inferred = next(node.infer())
- self.assertIsInstance(inferred, astroid.BoundMethod)
-
- @unittest.skipUnless(six.PY2, "needs Python 2")
- def test_concrete_objects_for_dict_methods(self):
- ast_nodes = builder.extract_node('''
- {1:1, 2:3}.values() #@
- {1:1, 2:3}.keys() #@
- {1:1, 2:3}.items() #@
- ''')
- values = next(ast_nodes[0].infer())
- self.assertIsInstance(values, astroid.List)
- self.assertEqual([value.value for value in values.elts], [1, 3])
-
- keys = next(ast_nodes[1].infer())
- self.assertIsInstance(keys, astroid.List)
- self.assertEqual([key.value for key in keys.elts], [1, 2])
-
- items = next(ast_nodes[2].infer())
- self.assertIsInstance(items, astroid.List)
- for expected, elem in zip([(1, 1), (2, 3)], items.elts):
- self.assertIsInstance(elem, astroid.Tuple)
- self.assertEqual(list(expected), [elt.value for elt in elem.elts])
-
- @unittest.skipIf(six.PY2, "needs Python 3")
- def test_wrapper_objects_for_dict_methods_python3(self):
- ast_nodes = builder.extract_node('''
- {1:1, 2:3}.values() #@
- {1:1, 2:3}.keys() #@
- {1:1, 2:3}.items() #@
- ''')
- values = next(ast_nodes[0].infer())
- self.assertIsInstance(values, objects.DictValues)
- self.assertEqual([elt.value for elt in values.elts], [1, 3])
- keys = next(ast_nodes[1].infer())
- self.assertIsInstance(keys, objects.DictKeys)
- self.assertEqual([elt.value for elt in keys.elts], [1, 2])
- items = next(ast_nodes[2].infer())
- self.assertIsInstance(items, objects.DictItems)
-
-
- class LruCacheModelTest(unittest.TestCase):
-
- @unittest.skipIf(six.PY2, "needs Python 3")
- def test_lru_cache(self):
- ast_nodes = builder.extract_node('''
- import functools
- class Foo(object):
- @functools.lru_cache()
- def foo():
- pass
- f = Foo()
- f.foo.cache_clear #@
- f.foo.__wrapped__ #@
- f.foo.cache_info() #@
- ''')
- cache_clear = next(ast_nodes[0].infer())
- self.assertIsInstance(cache_clear, astroid.BoundMethod)
- wrapped = next(ast_nodes[1].infer())
- self.assertIsInstance(wrapped, astroid.FunctionDef)
- self.assertEqual(wrapped.name, 'foo')
- cache_info = next(ast_nodes[2].infer())
- self.assertIsInstance(cache_info, astroid.Instance)
-
-
- if __name__ == '__main__':
- unittest.main()
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