Edit File: testpatch.py
# Copyright (C) 2007-2012 Michael Foord & the mock team # E-mail: fuzzyman AT voidspace DOT org DOT uk # http://www.voidspace.org.uk/python/mock/ import os import sys import six import unittest2 as unittest from mock.tests import support from mock.tests.support import SomeClass, is_instance, callable from mock import ( NonCallableMock, CallableMixin, patch, sentinel, MagicMock, Mock, NonCallableMagicMock, patch, DEFAULT, call ) from mock.mock import _patch, _get_target builtin_string = '__builtin__' if six.PY3: builtin_string = 'builtins' unicode = str PTModule = sys.modules[__name__] MODNAME = '%s.PTModule' % __name__ def _get_proxy(obj, get_only=True): class Proxy(object): def __getattr__(self, name): return getattr(obj, name) if not get_only: def __setattr__(self, name, value): setattr(obj, name, value) def __delattr__(self, name): delattr(obj, name) Proxy.__setattr__ = __setattr__ Proxy.__delattr__ = __delattr__ return Proxy() # for use in the test something = sentinel.Something something_else = sentinel.SomethingElse class Foo(object): def __init__(self, a): pass def f(self, a): pass def g(self): pass foo = 'bar' class Bar(object): def a(self): pass foo_name = '%s.Foo' % __name__ def function(a, b=Foo): pass class Container(object): def __init__(self): self.values = {} def __getitem__(self, name): return self.values[name] def __setitem__(self, name, value): self.values[name] = value def __delitem__(self, name): del self.values[name] def __iter__(self): return iter(self.values) class PatchTest(unittest.TestCase): def assertNotCallable(self, obj, magic=True): MockClass = NonCallableMagicMock if not magic: MockClass = NonCallableMock self.assertRaises(TypeError, obj) self.assertTrue(is_instance(obj, MockClass)) self.assertFalse(is_instance(obj, CallableMixin)) def test_single_patchobject(self): class Something(object): attribute = sentinel.Original @patch.object(Something, 'attribute', sentinel.Patched) def test(): self.assertEqual(Something.attribute, sentinel.Patched, "unpatched") test() self.assertEqual(Something.attribute, sentinel.Original, "patch not restored") def test_patchobject_with_none(self): class Something(object): attribute = sentinel.Original @patch.object(Something, 'attribute', None) def test(): self.assertIsNone(Something.attribute, "unpatched") test() self.assertEqual(Something.attribute, sentinel.Original, "patch not restored") def test_multiple_patchobject(self): class Something(object): attribute = sentinel.Original next_attribute = sentinel.Original2 @patch.object(Something, 'attribute', sentinel.Patched) @patch.object(Something, 'next_attribute', sentinel.Patched2) def test(): self.assertEqual(Something.attribute, sentinel.Patched, "unpatched") self.assertEqual(Something.next_attribute, sentinel.Patched2, "unpatched") test() self.assertEqual(Something.attribute, sentinel.Original, "patch not restored") self.assertEqual(Something.next_attribute, sentinel.Original2, "patch not restored") def test_object_lookup_is_quite_lazy(self): global something original = something @patch('%s.something' % __name__, sentinel.Something2) def test(): pass try: something = sentinel.replacement_value test() self.assertEqual(something, sentinel.replacement_value) finally: something = original def test_patch(self): @patch('%s.something' % __name__, sentinel.Something2) def test(): self.assertEqual(PTModule.something, sentinel.Something2, "unpatched") test() self.assertEqual(PTModule.something, sentinel.Something, "patch not restored") @patch('%s.something' % __name__, sentinel.Something2) @patch('%s.something_else' % __name__, sentinel.SomethingElse) def test(): self.assertEqual(PTModule.something, sentinel.Something2, "unpatched") self.assertEqual(PTModule.something_else, sentinel.SomethingElse, "unpatched") self.assertEqual(PTModule.something, sentinel.Something, "patch not restored") self.assertEqual(PTModule.something_else, sentinel.SomethingElse, "patch not restored") # Test the patching and restoring works a second time test() self.assertEqual(PTModule.something, sentinel.Something, "patch not restored") self.assertEqual(PTModule.something_else, sentinel.SomethingElse, "patch not restored") mock = Mock() mock.return_value = sentinel.Handle @patch('%s.open' % builtin_string, mock) def test(): self.assertEqual(open('filename', 'r'), sentinel.Handle, "open not patched") test() test() self.assertNotEqual(open, mock, "patch not restored") def test_patch_class_attribute(self): @patch('%s.SomeClass.class_attribute' % __name__, sentinel.ClassAttribute) def test(): self.assertEqual(PTModule.SomeClass.class_attribute, sentinel.ClassAttribute, "unpatched") test() self.assertIsNone(PTModule.SomeClass.class_attribute, "patch not restored") def test_patchobject_with_default_mock(self): class Test(object): something = sentinel.Original something2 = sentinel.Original2 @patch.object(Test, 'something') def test(mock): self.assertEqual(mock, Test.something, "Mock not passed into test function") self.assertIsInstance(mock, MagicMock, "patch with two arguments did not create a mock") test() @patch.object(Test, 'something') @patch.object(Test, 'something2') def test(this1, this2, mock1, mock2): self.assertEqual(this1, sentinel.this1, "Patched function didn't receive initial argument") self.assertEqual(this2, sentinel.this2, "Patched function didn't receive second argument") self.assertEqual(mock1, Test.something2, "Mock not passed into test function") self.assertEqual(mock2, Test.something, "Second Mock not passed into test function") self.assertIsInstance(mock2, MagicMock, "patch with two arguments did not create a mock") self.assertIsInstance(mock2, MagicMock, "patch with two arguments did not create a mock") # A hack to test that new mocks are passed the second time self.assertNotEqual(outerMock1, mock1, "unexpected value for mock1") self.assertNotEqual(outerMock2, mock2, "unexpected value for mock1") return mock1, mock2 outerMock1 = outerMock2 = None outerMock1, outerMock2 = test(sentinel.this1, sentinel.this2) # Test that executing a second time creates new mocks test(sentinel.this1, sentinel.this2) def test_patch_with_spec(self): @patch('%s.SomeClass' % __name__, spec=SomeClass) def test(MockSomeClass): self.assertEqual(SomeClass, MockSomeClass) self.assertTrue(is_instance(SomeClass.wibble, MagicMock)) self.assertRaises(AttributeError, lambda: SomeClass.not_wibble) test() def test_patchobject_with_spec(self): @patch.object(SomeClass, 'class_attribute', spec=SomeClass) def test(MockAttribute): self.assertEqual(SomeClass.class_attribute, MockAttribute) self.assertTrue(is_instance(SomeClass.class_attribute.wibble, MagicMock)) self.assertRaises(AttributeError, lambda: SomeClass.class_attribute.not_wibble) test() def test_patch_with_spec_as_list(self): @patch('%s.SomeClass' % __name__, spec=['wibble']) def test(MockSomeClass): self.assertEqual(SomeClass, MockSomeClass) self.assertTrue(is_instance(SomeClass.wibble, MagicMock)) self.assertRaises(AttributeError, lambda: SomeClass.not_wibble) test() def test_patchobject_with_spec_as_list(self): @patch.object(SomeClass, 'class_attribute', spec=['wibble']) def test(MockAttribute): self.assertEqual(SomeClass.class_attribute, MockAttribute) self.assertTrue(is_instance(SomeClass.class_attribute.wibble, MagicMock)) self.assertRaises(AttributeError, lambda: SomeClass.class_attribute.not_wibble) test() def test_nested_patch_with_spec_as_list(self): # regression test for nested decorators @patch('%s.open' % builtin_string) @patch('%s.SomeClass' % __name__, spec=['wibble']) def test(MockSomeClass, MockOpen): self.assertEqual(SomeClass, MockSomeClass) self.assertTrue(is_instance(SomeClass.wibble, MagicMock)) self.assertRaises(AttributeError, lambda: SomeClass.not_wibble) test() def test_patch_with_spec_as_boolean(self): @patch('%s.SomeClass' % __name__, spec=True) def test(MockSomeClass): self.assertEqual(SomeClass, MockSomeClass) # Should not raise attribute error MockSomeClass.wibble self.assertRaises(AttributeError, lambda: MockSomeClass.not_wibble) test() def test_patch_object_with_spec_as_boolean(self): @patch.object(PTModule, 'SomeClass', spec=True) def test(MockSomeClass): self.assertEqual(SomeClass, MockSomeClass) # Should not raise attribute error MockSomeClass.wibble self.assertRaises(AttributeError, lambda: MockSomeClass.not_wibble) test() def test_patch_class_acts_with_spec_is_inherited(self): @patch('%s.SomeClass' % __name__, spec=True) def test(MockSomeClass): self.assertTrue(is_instance(MockSomeClass, MagicMock)) instance = MockSomeClass() self.assertNotCallable(instance) # Should not raise attribute error instance.wibble self.assertRaises(AttributeError, lambda: instance.not_wibble) test() def test_patch_with_create_mocks_non_existent_attributes(self): @patch('%s.frooble' % builtin_string, sentinel.Frooble, create=True) def test(): self.assertEqual(frooble, sentinel.Frooble) test() self.assertRaises(NameError, lambda: frooble) def test_patchobject_with_create_mocks_non_existent_attributes(self): @patch.object(SomeClass, 'frooble', sentinel.Frooble, create=True) def test(): self.assertEqual(SomeClass.frooble, sentinel.Frooble) test() self.assertFalse(hasattr(SomeClass, 'frooble')) def test_patch_wont_create_by_default(self): try: @patch('%s.frooble' % builtin_string, sentinel.Frooble) def test(): self.assertEqual(frooble, sentinel.Frooble) test() except AttributeError: pass else: self.fail('Patching non existent attributes should fail') self.assertRaises(NameError, lambda: frooble) def test_patchobject_wont_create_by_default(self): try: @patch.object(SomeClass, 'ord', sentinel.Frooble) def test(): self.fail('Patching non existent attributes should fail') test() except AttributeError: pass else: self.fail('Patching non existent attributes should fail') self.assertFalse(hasattr(SomeClass, 'ord')) def test_patch_builtins_without_create(self): @patch(__name__+'.ord') def test_ord(mock_ord): mock_ord.return_value = 101 return ord('c') @patch(__name__+'.open') def test_open(mock_open): m = mock_open.return_value m.read.return_value = 'abcd' fobj = open('doesnotexists.txt') data = fobj.read() fobj.close() return data self.assertEqual(test_ord(), 101) self.assertEqual(test_open(), 'abcd') def test_patch_with_static_methods(self): class Foo(object): @staticmethod def woot(): return sentinel.Static @patch.object(Foo, 'woot', staticmethod(lambda: sentinel.Patched)) def anonymous(): self.assertEqual(Foo.woot(), sentinel.Patched) anonymous() self.assertEqual(Foo.woot(), sentinel.Static) def test_patch_local(self): foo = sentinel.Foo @patch.object(sentinel, 'Foo', 'Foo') def anonymous(): self.assertEqual(sentinel.Foo, 'Foo') anonymous() self.assertEqual(sentinel.Foo, foo) def test_patch_slots(self): class Foo(object): __slots__ = ('Foo',) foo = Foo() foo.Foo = sentinel.Foo @patch.object(foo, 'Foo', 'Foo') def anonymous(): self.assertEqual(foo.Foo, 'Foo') anonymous() self.assertEqual(foo.Foo, sentinel.Foo) def test_patchobject_class_decorator(self): class Something(object): attribute = sentinel.Original class Foo(object): def test_method(other_self): self.assertEqual(Something.attribute, sentinel.Patched, "unpatched") def not_test_method(other_self): self.assertEqual(Something.attribute, sentinel.Original, "non-test method patched") Foo = patch.object(Something, 'attribute', sentinel.Patched)(Foo) f = Foo() f.test_method() f.not_test_method() self.assertEqual(Something.attribute, sentinel.Original, "patch not restored") def test_patch_class_decorator(self): class Something(object): attribute = sentinel.Original class Foo(object): def test_method(other_self, mock_something): self.assertEqual(PTModule.something, mock_something, "unpatched") def not_test_method(other_self): self.assertEqual(PTModule.something, sentinel.Something, "non-test method patched") Foo = patch('%s.something' % __name__)(Foo) f = Foo() f.test_method() f.not_test_method() self.assertEqual(Something.attribute, sentinel.Original, "patch not restored") self.assertEqual(PTModule.something, sentinel.Something, "patch not restored") def test_patchobject_twice(self): class Something(object): attribute = sentinel.Original next_attribute = sentinel.Original2 @patch.object(Something, 'attribute', sentinel.Patched) @patch.object(Something, 'attribute', sentinel.Patched) def test(): self.assertEqual(Something.attribute, sentinel.Patched, "unpatched") test() self.assertEqual(Something.attribute, sentinel.Original, "patch not restored") def test_patch_dict(self): foo = {'initial': object(), 'other': 'something'} original = foo.copy() @patch.dict(foo) def test(): foo['a'] = 3 del foo['initial'] foo['other'] = 'something else' test() self.assertEqual(foo, original) @patch.dict(foo, {'a': 'b'}) def test(): self.assertEqual(len(foo), 3) self.assertEqual(foo['a'], 'b') test() self.assertEqual(foo, original) @patch.dict(foo, [('a', 'b')]) def test(): self.assertEqual(len(foo), 3) self.assertEqual(foo['a'], 'b') test() self.assertEqual(foo, original) def test_patch_dict_with_container_object(self): foo = Container() foo['initial'] = object() foo['other'] = 'something' original = foo.values.copy() @patch.dict(foo) def test(): foo['a'] = 3 del foo['initial'] foo['other'] = 'something else' test() self.assertEqual(foo.values, original) @patch.dict(foo, {'a': 'b'}) def test(): self.assertEqual(len(foo.values), 3) self.assertEqual(foo['a'], 'b') test() self.assertEqual(foo.values, original) def test_patch_dict_with_clear(self): foo = {'initial': object(), 'other': 'something'} original = foo.copy() @patch.dict(foo, clear=True) def test(): self.assertEqual(foo, {}) foo['a'] = 3 foo['other'] = 'something else' test() self.assertEqual(foo, original) @patch.dict(foo, {'a': 'b'}, clear=True) def test(): self.assertEqual(foo, {'a': 'b'}) test() self.assertEqual(foo, original) @patch.dict(foo, [('a', 'b')], clear=True) def test(): self.assertEqual(foo, {'a': 'b'}) test() self.assertEqual(foo, original) def test_patch_dict_with_container_object_and_clear(self): foo = Container() foo['initial'] = object() foo['other'] = 'something' original = foo.values.copy() @patch.dict(foo, clear=True) def test(): self.assertEqual(foo.values, {}) foo['a'] = 3 foo['other'] = 'something else' test() self.assertEqual(foo.values, original) @patch.dict(foo, {'a': 'b'}, clear=True) def test(): self.assertEqual(foo.values, {'a': 'b'}) test() self.assertEqual(foo.values, original) def test_name_preserved(self): foo = {} @patch('%s.SomeClass' % __name__, object()) @patch('%s.SomeClass' % __name__, object(), autospec=True) @patch.object(SomeClass, object()) @patch.dict(foo) def some_name(): pass self.assertEqual(some_name.__name__, 'some_name') def test_patch_with_exception(self): foo = {} @patch.dict(foo, {'a': 'b'}) def test(): raise NameError('Konrad') try: test() except NameError: pass else: self.fail('NameError not raised by test') self.assertEqual(foo, {}) def test_patch_dict_with_string(self): @patch.dict('os.environ', {'konrad_delong': 'some value'}) def test(): self.assertIn('konrad_delong', os.environ) test() @unittest.expectedFailure def test_patch_descriptor(self): # would be some effort to fix this - we could special case the # builtin descriptors: classmethod, property, staticmethod class Nothing(object): foo = None class Something(object): foo = {} @patch.object(Nothing, 'foo', 2) @classmethod def klass(cls): self.assertIs(cls, Something) @patch.object(Nothing, 'foo', 2) @staticmethod def static(arg): return arg @patch.dict(foo) @classmethod def klass_dict(cls): self.assertIs(cls, Something) @patch.dict(foo) @staticmethod def static_dict(arg): return arg # these will raise exceptions if patching descriptors is broken self.assertEqual(Something.static('f00'), 'f00') Something.klass() self.assertEqual(Something.static_dict('f00'), 'f00') Something.klass_dict() something = Something() self.assertEqual(something.static('f00'), 'f00') something.klass() self.assertEqual(something.static_dict('f00'), 'f00') something.klass_dict() def test_patch_spec_set(self): @patch('%s.SomeClass' % __name__, spec_set=SomeClass) def test(MockClass): MockClass.z = 'foo' self.assertRaises(AttributeError, test) @patch.object(support, 'SomeClass', spec_set=SomeClass) def test(MockClass): MockClass.z = 'foo' self.assertRaises(AttributeError, test) @patch('%s.SomeClass' % __name__, spec_set=True) def test(MockClass): MockClass.z = 'foo' self.assertRaises(AttributeError, test) @patch.object(support, 'SomeClass', spec_set=True) def test(MockClass): MockClass.z = 'foo' self.assertRaises(AttributeError, test) def test_spec_set_inherit(self): @patch('%s.SomeClass' % __name__, spec_set=True) def test(MockClass): instance = MockClass() instance.z = 'foo' self.assertRaises(AttributeError, test) def test_patch_start_stop(self): original = something patcher = patch('%s.something' % __name__) self.assertIs(something, original) mock = patcher.start() try: self.assertIsNot(mock, original) self.assertIs(something, mock) finally: patcher.stop() self.assertIs(something, original) def test_stop_without_start(self): patcher = patch(foo_name, 'bar', 3) # calling stop without start used to produce a very obscure error self.assertRaises(RuntimeError, patcher.stop) def test_patchobject_start_stop(self): original = something patcher = patch.object(PTModule, 'something', 'foo') self.assertIs(something, original) replaced = patcher.start() try: self.assertEqual(replaced, 'foo') self.assertIs(something, replaced) finally: patcher.stop() self.assertIs(something, original) def test_patch_dict_start_stop(self): d = {'foo': 'bar'} original = d.copy() patcher = patch.dict(d, [('spam', 'eggs')], clear=True) self.assertEqual(d, original) patcher.start() try: self.assertEqual(d, {'spam': 'eggs'}) finally: patcher.stop() self.assertEqual(d, original) def test_patch_dict_class_decorator(self): this = self d = {'spam': 'eggs'} original = d.copy() class Test(object): def test_first(self): this.assertEqual(d, {'foo': 'bar'}) def test_second(self): this.assertEqual(d, {'foo': 'bar'}) Test = patch.dict(d, {'foo': 'bar'}, clear=True)(Test) self.assertEqual(d, original) test = Test() test.test_first() self.assertEqual(d, original) test.test_second() self.assertEqual(d, original) test = Test() test.test_first() self.assertEqual(d, original) test.test_second() self.assertEqual(d, original) def test_get_only_proxy(self): class Something(object): foo = 'foo' class SomethingElse: foo = 'foo' for thing in Something, SomethingElse, Something(), SomethingElse: proxy = _get_proxy(thing) @patch.object(proxy, 'foo', 'bar') def test(): self.assertEqual(proxy.foo, 'bar') test() self.assertEqual(proxy.foo, 'foo') self.assertEqual(thing.foo, 'foo') self.assertNotIn('foo', proxy.__dict__) def test_get_set_delete_proxy(self): class Something(object): foo = 'foo' class SomethingElse: foo = 'foo' for thing in Something, SomethingElse, Something(), SomethingElse: proxy = _get_proxy(Something, get_only=False) @patch.object(proxy, 'foo', 'bar') def test(): self.assertEqual(proxy.foo, 'bar') test() self.assertEqual(proxy.foo, 'foo') self.assertEqual(thing.foo, 'foo') self.assertNotIn('foo', proxy.__dict__) def test_patch_keyword_args(self): kwargs = {'side_effect': KeyError, 'foo.bar.return_value': 33, 'foo': MagicMock()} patcher = patch(foo_name, **kwargs) mock = patcher.start() patcher.stop() self.assertRaises(KeyError, mock) self.assertEqual(mock.foo.bar(), 33) self.assertIsInstance(mock.foo, MagicMock) def test_patch_object_keyword_args(self): kwargs = {'side_effect': KeyError, 'foo.bar.return_value': 33, 'foo': MagicMock()} patcher = patch.object(Foo, 'f', **kwargs) mock = patcher.start() patcher.stop() self.assertRaises(KeyError, mock) self.assertEqual(mock.foo.bar(), 33) self.assertIsInstance(mock.foo, MagicMock) def test_patch_dict_keyword_args(self): original = {'foo': 'bar'} copy = original.copy() patcher = patch.dict(original, foo=3, bar=4, baz=5) patcher.start() try: self.assertEqual(original, dict(foo=3, bar=4, baz=5)) finally: patcher.stop() self.assertEqual(original, copy) def test_autospec(self): class Boo(object): def __init__(self, a): pass def f(self, a): pass def g(self): pass foo = 'bar' class Bar(object): def a(self): pass def _test(mock): mock(1) mock.assert_called_with(1) self.assertRaises(TypeError, mock) def _test2(mock): mock.f(1) mock.f.assert_called_with(1) self.assertRaises(TypeError, mock.f) mock.g() mock.g.assert_called_with() self.assertRaises(TypeError, mock.g, 1) self.assertRaises(AttributeError, getattr, mock, 'h') mock.foo.lower() mock.foo.lower.assert_called_with() self.assertRaises(AttributeError, getattr, mock.foo, 'bar') mock.Bar() mock.Bar.assert_called_with() mock.Bar.a() mock.Bar.a.assert_called_with() self.assertRaises(TypeError, mock.Bar.a, 1) mock.Bar().a() mock.Bar().a.assert_called_with() self.assertRaises(TypeError, mock.Bar().a, 1) self.assertRaises(AttributeError, getattr, mock.Bar, 'b') self.assertRaises(AttributeError, getattr, mock.Bar(), 'b') def function(mock): _test(mock) _test2(mock) _test2(mock(1)) self.assertIs(mock, Foo) return mock test = patch(foo_name, autospec=True)(function) mock = test() self.assertIsNot(Foo, mock) # test patching a second time works test() module = sys.modules[__name__] test = patch.object(module, 'Foo', autospec=True)(function) mock = test() self.assertIsNot(Foo, mock) # test patching a second time works test() def test_autospec_function(self): @patch('%s.function' % __name__, autospec=True) def test(mock): function(1) function.assert_called_with(1) function(2, 3) function.assert_called_with(2, 3) self.assertRaises(TypeError, function) self.assertRaises(AttributeError, getattr, function, 'foo') test() def test_autospec_keywords(self): @patch('%s.function' % __name__, autospec=True, return_value=3) def test(mock_function): #self.assertEqual(function.abc, 'foo') return function(1, 2) result = test() self.assertEqual(result, 3) def test_autospec_with_new(self): patcher = patch('%s.function' % __name__, new=3, autospec=True) self.assertRaises(TypeError, patcher.start) module = sys.modules[__name__] patcher = patch.object(module, 'function', new=3, autospec=True) self.assertRaises(TypeError, patcher.start) def test_autospec_with_object(self): class Bar(Foo): extra = [] patcher = patch(foo_name, autospec=Bar) mock = patcher.start() try: self.assertIsInstance(mock, Bar) self.assertIsInstance(mock.extra, list) finally: patcher.stop() def test_autospec_inherits(self): FooClass = Foo patcher = patch(foo_name, autospec=True) mock = patcher.start() try: self.assertIsInstance(mock, FooClass) self.assertIsInstance(mock(3), FooClass) finally: patcher.stop() def test_autospec_name(self): patcher = patch(foo_name, autospec=True) mock = patcher.start() try: self.assertIn(" name='Foo'", repr(mock)) self.assertIn(" name='Foo.f'", repr(mock.f)) self.assertIn(" name='Foo()'", repr(mock(None))) self.assertIn(" name='Foo().f'", repr(mock(None).f)) finally: patcher.stop() def test_tracebacks(self): @patch.object(Foo, 'f', object()) def test(): raise AssertionError try: test() except: err = sys.exc_info() result = unittest.TextTestResult(None, None, 0) traceback = result._exc_info_to_string(err, self) self.assertIn('raise AssertionError', traceback) def test_new_callable_patch(self): patcher = patch(foo_name, new_callable=NonCallableMagicMock) m1 = patcher.start() patcher.stop() m2 = patcher.start() patcher.stop() self.assertIsNot(m1, m2) for mock in m1, m2: self.assertNotCallable(m1) def test_new_callable_patch_object(self): patcher = patch.object(Foo, 'f', new_callable=NonCallableMagicMock) m1 = patcher.start() patcher.stop() m2 = patcher.start() patcher.stop() self.assertIsNot(m1, m2) for mock in m1, m2: self.assertNotCallable(m1) def test_new_callable_keyword_arguments(self): class Bar(object): kwargs = None def __init__(self, **kwargs): Bar.kwargs = kwargs patcher = patch(foo_name, new_callable=Bar, arg1=1, arg2=2) m = patcher.start() try: self.assertIs(type(m), Bar) self.assertEqual(Bar.kwargs, dict(arg1=1, arg2=2)) finally: patcher.stop() def test_new_callable_spec(self): class Bar(object): kwargs = None def __init__(self, **kwargs): Bar.kwargs = kwargs patcher = patch(foo_name, new_callable=Bar, spec=Bar) patcher.start() try: self.assertEqual(Bar.kwargs, dict(spec=Bar)) finally: patcher.stop() patcher = patch(foo_name, new_callable=Bar, spec_set=Bar) patcher.start() try: self.assertEqual(Bar.kwargs, dict(spec_set=Bar)) finally: patcher.stop() def test_new_callable_create(self): non_existent_attr = '%s.weeeee' % foo_name p = patch(non_existent_attr, new_callable=NonCallableMock) self.assertRaises(AttributeError, p.start) p = patch(non_existent_attr, new_callable=NonCallableMock, create=True) m = p.start() try: self.assertNotCallable(m, magic=False) finally: p.stop() def test_new_callable_incompatible_with_new(self): self.assertRaises( ValueError, patch, foo_name, new=object(), new_callable=MagicMock ) self.assertRaises( ValueError, patch.object, Foo, 'f', new=object(), new_callable=MagicMock ) def test_new_callable_incompatible_with_autospec(self): self.assertRaises( ValueError, patch, foo_name, new_callable=MagicMock, autospec=True ) self.assertRaises( ValueError, patch.object, Foo, 'f', new_callable=MagicMock, autospec=True ) def test_new_callable_inherit_for_mocks(self): class MockSub(Mock): pass MockClasses = ( NonCallableMock, NonCallableMagicMock, MagicMock, Mock, MockSub ) for Klass in MockClasses: for arg in 'spec', 'spec_set': kwargs = {arg: True} p = patch(foo_name, new_callable=Klass, **kwargs) m = p.start() try: instance = m.return_value self.assertRaises(AttributeError, getattr, instance, 'x') finally: p.stop() def test_new_callable_inherit_non_mock(self): class NotAMock(object): def __init__(self, spec): self.spec = spec p = patch(foo_name, new_callable=NotAMock, spec=True) m = p.start() try: self.assertTrue(is_instance(m, NotAMock)) self.assertRaises(AttributeError, getattr, m, 'return_value') finally: p.stop() self.assertEqual(m.spec, Foo) def test_new_callable_class_decorating(self): test = self original = Foo class SomeTest(object): def _test(self, mock_foo): test.assertIsNot(Foo, original) test.assertIs(Foo, mock_foo) test.assertIsInstance(Foo, SomeClass) def test_two(self, mock_foo): self._test(mock_foo) def test_one(self, mock_foo): self._test(mock_foo) SomeTest = patch(foo_name, new_callable=SomeClass)(SomeTest) SomeTest().test_one() SomeTest().test_two() self.assertIs(Foo, original) def test_patch_multiple(self): original_foo = Foo original_f = Foo.f original_g = Foo.g patcher1 = patch.multiple(foo_name, f=1, g=2) patcher2 = patch.multiple(Foo, f=1, g=2) for patcher in patcher1, patcher2: patcher.start() try: self.assertIs(Foo, original_foo) self.assertEqual(Foo.f, 1) self.assertEqual(Foo.g, 2) finally: patcher.stop() self.assertIs(Foo, original_foo) self.assertEqual(Foo.f, original_f) self.assertEqual(Foo.g, original_g) @patch.multiple(foo_name, f=3, g=4) def test(): self.assertIs(Foo, original_foo) self.assertEqual(Foo.f, 3) self.assertEqual(Foo.g, 4) test() def test_patch_multiple_no_kwargs(self): self.assertRaises(ValueError, patch.multiple, foo_name) self.assertRaises(ValueError, patch.multiple, Foo) def test_patch_multiple_create_mocks(self): original_foo = Foo original_f = Foo.f original_g = Foo.g @patch.multiple(foo_name, f=DEFAULT, g=3, foo=DEFAULT) def test(f, foo): self.assertIs(Foo, original_foo) self.assertIs(Foo.f, f) self.assertEqual(Foo.g, 3) self.assertIs(Foo.foo, foo) self.assertTrue(is_instance(f, MagicMock)) self.assertTrue(is_instance(foo, MagicMock)) test() self.assertEqual(Foo.f, original_f) self.assertEqual(Foo.g, original_g) def test_patch_multiple_create_mocks_different_order(self): # bug revealed by Jython! original_f = Foo.f original_g = Foo.g patcher = patch.object(Foo, 'f', 3) patcher.attribute_name = 'f' other = patch.object(Foo, 'g', DEFAULT) other.attribute_name = 'g' patcher.additional_patchers = [other] @patcher def test(g): self.assertIs(Foo.g, g) self.assertEqual(Foo.f, 3) test() self.assertEqual(Foo.f, original_f) self.assertEqual(Foo.g, original_g) def test_patch_multiple_stacked_decorators(self): original_foo = Foo original_f = Foo.f original_g = Foo.g @patch.multiple(foo_name, f=DEFAULT) @patch.multiple(foo_name, foo=DEFAULT) @patch(foo_name + '.g') def test1(g, **kwargs): _test(g, **kwargs) @patch.multiple(foo_name, f=DEFAULT) @patch(foo_name + '.g') @patch.multiple(foo_name, foo=DEFAULT) def test2(g, **kwargs): _test(g, **kwargs) @patch(foo_name + '.g') @patch.multiple(foo_name, f=DEFAULT) @patch.multiple(foo_name, foo=DEFAULT) def test3(g, **kwargs): _test(g, **kwargs) def _test(g, **kwargs): f = kwargs.pop('f') foo = kwargs.pop('foo') self.assertFalse(kwargs) self.assertIs(Foo, original_foo) self.assertIs(Foo.f, f) self.assertIs(Foo.g, g) self.assertIs(Foo.foo, foo) self.assertTrue(is_instance(f, MagicMock)) self.assertTrue(is_instance(g, MagicMock)) self.assertTrue(is_instance(foo, MagicMock)) test1() test2() test3() self.assertEqual(Foo.f, original_f) self.assertEqual(Foo.g, original_g) def test_patch_multiple_create_mocks_patcher(self): original_foo = Foo original_f = Foo.f original_g = Foo.g patcher = patch.multiple(foo_name, f=DEFAULT, g=3, foo=DEFAULT) result = patcher.start() try: f = result['f'] foo = result['foo'] self.assertEqual(set(result), set(['f', 'foo'])) self.assertIs(Foo, original_foo) self.assertIs(Foo.f, f) self.assertIs(Foo.foo, foo) self.assertTrue(is_instance(f, MagicMock)) self.assertTrue(is_instance(foo, MagicMock)) finally: patcher.stop() self.assertEqual(Foo.f, original_f) self.assertEqual(Foo.g, original_g) def test_patch_multiple_decorating_class(self): test = self original_foo = Foo original_f = Foo.f original_g = Foo.g class SomeTest(object): def _test(self, f, foo): test.assertIs(Foo, original_foo) test.assertIs(Foo.f, f) test.assertEqual(Foo.g, 3) test.assertIs(Foo.foo, foo) test.assertTrue(is_instance(f, MagicMock)) test.assertTrue(is_instance(foo, MagicMock)) def test_two(self, f, foo): self._test(f, foo) def test_one(self, f, foo): self._test(f, foo) SomeTest = patch.multiple( foo_name, f=DEFAULT, g=3, foo=DEFAULT )(SomeTest) thing = SomeTest() thing.test_one() thing.test_two() self.assertEqual(Foo.f, original_f) self.assertEqual(Foo.g, original_g) def test_patch_multiple_create(self): patcher = patch.multiple(Foo, blam='blam') self.assertRaises(AttributeError, patcher.start) patcher = patch.multiple(Foo, blam='blam', create=True) patcher.start() try: self.assertEqual(Foo.blam, 'blam') finally: patcher.stop() self.assertFalse(hasattr(Foo, 'blam')) def test_patch_multiple_spec_set(self): # if spec_set works then we can assume that spec and autospec also # work as the underlying machinery is the same patcher = patch.multiple(Foo, foo=DEFAULT, spec_set=['a', 'b']) result = patcher.start() try: self.assertEqual(Foo.foo, result['foo']) Foo.foo.a(1) Foo.foo.b(2) Foo.foo.a.assert_called_with(1) Foo.foo.b.assert_called_with(2) self.assertRaises(AttributeError, setattr, Foo.foo, 'c', None) finally: patcher.stop() def test_patch_multiple_new_callable(self): class Thing(object): pass patcher = patch.multiple( Foo, f=DEFAULT, g=DEFAULT, new_callable=Thing ) result = patcher.start() try: self.assertIs(Foo.f, result['f']) self.assertIs(Foo.g, result['g']) self.assertIsInstance(Foo.f, Thing) self.assertIsInstance(Foo.g, Thing) self.assertIsNot(Foo.f, Foo.g) finally: patcher.stop() def test_nested_patch_failure(self): original_f = Foo.f original_g = Foo.g @patch.object(Foo, 'g', 1) @patch.object(Foo, 'missing', 1) @patch.object(Foo, 'f', 1) def thing1(): pass @patch.object(Foo, 'missing', 1) @patch.object(Foo, 'g', 1) @patch.object(Foo, 'f', 1) def thing2(): pass @patch.object(Foo, 'g', 1) @patch.object(Foo, 'f', 1) @patch.object(Foo, 'missing', 1) def thing3(): pass for func in thing1, thing2, thing3: self.assertRaises(AttributeError, func) self.assertEqual(Foo.f, original_f) self.assertEqual(Foo.g, original_g) def test_new_callable_failure(self): original_f = Foo.f original_g = Foo.g original_foo = Foo.foo def crasher(): raise NameError('crasher') @patch.object(Foo, 'g', 1) @patch.object(Foo, 'foo', new_callable=crasher) @patch.object(Foo, 'f', 1) def thing1(): pass @patch.object(Foo, 'foo', new_callable=crasher) @patch.object(Foo, 'g', 1) @patch.object(Foo, 'f', 1) def thing2(): pass @patch.object(Foo, 'g', 1) @patch.object(Foo, 'f', 1) @patch.object(Foo, 'foo', new_callable=crasher) def thing3(): pass for func in thing1, thing2, thing3: self.assertRaises(NameError, func) self.assertEqual(Foo.f, original_f) self.assertEqual(Foo.g, original_g) self.assertEqual(Foo.foo, original_foo) def test_patch_multiple_failure(self): original_f = Foo.f original_g = Foo.g patcher = patch.object(Foo, 'f', 1) patcher.attribute_name = 'f' good = patch.object(Foo, 'g', 1) good.attribute_name = 'g' bad = patch.object(Foo, 'missing', 1) bad.attribute_name = 'missing' for additionals in [good, bad], [bad, good]: patcher.additional_patchers = additionals @patcher def func(): pass self.assertRaises(AttributeError, func) self.assertEqual(Foo.f, original_f) self.assertEqual(Foo.g, original_g) def test_patch_multiple_new_callable_failure(self): original_f = Foo.f original_g = Foo.g original_foo = Foo.foo def crasher(): raise NameError('crasher') patcher = patch.object(Foo, 'f', 1) patcher.attribute_name = 'f' good = patch.object(Foo, 'g', 1) good.attribute_name = 'g' bad = patch.object(Foo, 'foo', new_callable=crasher) bad.attribute_name = 'foo' for additionals in [good, bad], [bad, good]: patcher.additional_patchers = additionals @patcher def func(): pass self.assertRaises(NameError, func) self.assertEqual(Foo.f, original_f) self.assertEqual(Foo.g, original_g) self.assertEqual(Foo.foo, original_foo) def test_patch_multiple_string_subclasses(self): for base in (str, unicode): Foo = type('Foo', (base,), {'fish': 'tasty'}) foo = Foo() @patch.multiple(foo, fish='nearly gone') def test(): self.assertEqual(foo.fish, 'nearly gone') test() self.assertEqual(foo.fish, 'tasty') @patch('mock.patch.TEST_PREFIX', 'foo') def test_patch_test_prefix(self): class Foo(object): thing = 'original' def foo_one(self): return self.thing def foo_two(self): return self.thing def test_one(self): return self.thing def test_two(self): return self.thing Foo = patch.object(Foo, 'thing', 'changed')(Foo) foo = Foo() self.assertEqual(foo.foo_one(), 'changed') self.assertEqual(foo.foo_two(), 'changed') self.assertEqual(foo.test_one(), 'original') self.assertEqual(foo.test_two(), 'original') @patch('mock.patch.TEST_PREFIX', 'bar') def test_patch_dict_test_prefix(self): class Foo(object): def bar_one(self): return dict(the_dict) def bar_two(self): return dict(the_dict) def test_one(self): return dict(the_dict) def test_two(self): return dict(the_dict) the_dict = {'key': 'original'} Foo = patch.dict(the_dict, key='changed')(Foo) foo =Foo() self.assertEqual(foo.bar_one(), {'key': 'changed'}) self.assertEqual(foo.bar_two(), {'key': 'changed'}) self.assertEqual(foo.test_one(), {'key': 'original'}) self.assertEqual(foo.test_two(), {'key': 'original'}) def test_patch_with_spec_mock_repr(self): for arg in ('spec', 'autospec', 'spec_set'): p = patch('%s.SomeClass' % __name__, **{arg: True}) m = p.start() try: self.assertIn(" name='SomeClass'", repr(m)) self.assertIn(" name='SomeClass.class_attribute'", repr(m.class_attribute)) self.assertIn(" name='SomeClass()'", repr(m())) self.assertIn(" name='SomeClass().class_attribute'", repr(m().class_attribute)) finally: p.stop() def test_patch_nested_autospec_repr(self): p = patch('mock.tests.support', autospec=True) m = p.start() try: self.assertIn(" name='support.SomeClass.wibble()'", repr(m.SomeClass.wibble())) self.assertIn(" name='support.SomeClass().wibble()'", repr(m.SomeClass().wibble())) finally: p.stop() def test_mock_calls_with_patch(self): for arg in ('spec', 'autospec', 'spec_set'): p = patch('%s.SomeClass' % __name__, **{arg: True}) m = p.start() try: m.wibble() kalls = [call.wibble()] self.assertEqual(m.mock_calls, kalls) self.assertEqual(m.method_calls, kalls) self.assertEqual(m.wibble.mock_calls, [call()]) result = m() kalls.append(call()) self.assertEqual(m.mock_calls, kalls) result.wibble() kalls.append(call().wibble()) self.assertEqual(m.mock_calls, kalls) self.assertEqual(result.mock_calls, [call.wibble()]) self.assertEqual(result.wibble.mock_calls, [call()]) self.assertEqual(result.method_calls, [call.wibble()]) finally: p.stop() def test_patch_imports_lazily(self): sys.modules.pop('squizz', None) p1 = patch('squizz.squozz') self.assertRaises(ImportError, p1.start) squizz = Mock() squizz.squozz = 6 sys.modules['squizz'] = squizz p1 = patch('squizz.squozz') squizz.squozz = 3 p1.start() p1.stop() self.assertEqual(squizz.squozz, 3) def test_patch_propogrates_exc_on_exit(self): class holder: exc_info = None, None, None class custom_patch(_patch): def __exit__(self, etype=None, val=None, tb=None): _patch.__exit__(self, etype, val, tb) holder.exc_info = etype, val, tb stop = __exit__ def with_custom_patch(target): getter, attribute = _get_target(target) return custom_patch( getter, attribute, DEFAULT, None, False, None, None, None, {} ) @with_custom_patch('squizz.squozz') def test(mock): raise RuntimeError self.assertRaises(RuntimeError, test) self.assertIs(holder.exc_info[0], RuntimeError) self.assertIsNotNone(holder.exc_info[1], 'exception value not propgated') self.assertIsNotNone(holder.exc_info[2], 'exception traceback not propgated') def test_create_and_specs(self): for kwarg in ('spec', 'spec_set', 'autospec'): p = patch('%s.doesnotexist' % __name__, create=True, **{kwarg: True}) self.assertRaises(TypeError, p.start) self.assertRaises(NameError, lambda: doesnotexist) # check that spec with create is innocuous if the original exists p = patch(MODNAME, create=True, **{kwarg: True}) p.start() p.stop() def test_multiple_specs(self): original = PTModule for kwarg in ('spec', 'spec_set'): p = patch(MODNAME, autospec=0, **{kwarg: 0}) self.assertRaises(TypeError, p.start) self.assertIs(PTModule, original) for kwarg in ('spec', 'autospec'): p = patch(MODNAME, spec_set=0, **{kwarg: 0}) self.assertRaises(TypeError, p.start) self.assertIs(PTModule, original) for kwarg in ('spec_set', 'autospec'): p = patch(MODNAME, spec=0, **{kwarg: 0}) self.assertRaises(TypeError, p.start) self.assertIs(PTModule, original) def test_specs_false_instead_of_none(self): p = patch(MODNAME, spec=False, spec_set=False, autospec=False) mock = p.start() try: # no spec should have been set, so attribute access should not fail mock.does_not_exist mock.does_not_exist = 3 finally: p.stop() def test_falsey_spec(self): for kwarg in ('spec', 'autospec', 'spec_set'): p = patch(MODNAME, **{kwarg: 0}) m = p.start() try: self.assertRaises(AttributeError, getattr, m, 'doesnotexit') finally: p.stop() def test_spec_set_true(self): for kwarg in ('spec', 'autospec'): p = patch(MODNAME, spec_set=True, **{kwarg: True}) m = p.start() try: self.assertRaises(AttributeError, setattr, m, 'doesnotexist', 'something') self.assertRaises(AttributeError, getattr, m, 'doesnotexist') finally: p.stop() def test_callable_spec_as_list(self): spec = ('__call__',) p = patch(MODNAME, spec=spec) m = p.start() try: self.assertTrue(callable(m)) finally: p.stop() def test_not_callable_spec_as_list(self): spec = ('foo', 'bar') p = patch(MODNAME, spec=spec) m = p.start() try: self.assertFalse(callable(m)) finally: p.stop() def test_patch_stopall(self): unlink = os.unlink chdir = os.chdir path = os.path patch('os.unlink', something).start() patch('os.chdir', something_else).start() @patch('os.path') def patched(mock_path): patch.stopall() self.assertIs(os.path, mock_path) self.assertIs(os.unlink, unlink) self.assertIs(os.chdir, chdir) patched() self.assertIs(os.path, path) def test_wrapped_patch(self): decorated = patch('sys.modules')(function) self.assertIs(decorated.__wrapped__, function) def test_wrapped_several_times_patch(self): decorated = patch('sys.modules')(function) decorated = patch('sys.modules')(decorated) self.assertIs(decorated.__wrapped__, function) def test_wrapped_patch_object(self): decorated = patch.object(sys, 'modules')(function) self.assertIs(decorated.__wrapped__, function) def test_wrapped_patch_dict(self): decorated = patch.dict('sys.modules')(function) self.assertIs(decorated.__wrapped__, function) def test_wrapped_patch_multiple(self): decorated = patch.multiple('sys', modules={})(function) self.assertIs(decorated.__wrapped__, function) def test_stopall_lifo(self): stopped = [] class thing(object): one = two = three = None def get_patch(attribute): class mypatch(_patch): def stop(self): stopped.append(attribute) return super(mypatch, self).stop() return mypatch(lambda: thing, attribute, None, None, False, None, None, None, {}) [get_patch(val).start() for val in ("one", "two", "three")] patch.stopall() self.assertEqual(stopped, ["three", "two", "one"]) def test_special_attrs(self): def foo(x=0): """TEST""" return x with patch.object(foo, '__defaults__', (1, )): self.assertEqual(foo(), 1) self.assertEqual(foo(), 0) with patch.object(foo, '__doc__', "FUN"): self.assertEqual(foo.__doc__, "FUN") self.assertEqual(foo.__doc__, "TEST") with patch.object(foo, '__module__', "testpatch2"): self.assertEqual(foo.__module__, "testpatch2") self.assertEqual(foo.__module__, __name__) if hasattr(self.test_special_attrs, '__annotations__'): with patch.object(foo, '__annotations__', dict([('s', 1, )])): self.assertEqual(foo.__annotations__, dict([('s', 1, )])) self.assertEqual(foo.__annotations__, dict()) if hasattr(self.test_special_attrs, '__kwdefaults__'): foo = eval("lambda *a, x=0: x") with patch.object(foo, '__kwdefaults__', dict([('x', 1, )])): self.assertEqual(foo(), 1) self.assertEqual(foo(), 0) if __name__ == '__main__': unittest.main()