def test_spec_class(self):
        class X(object):
            pass

        mock = Mock(spec=X)
        self.assertTrue(isinstance(mock, X))

        mock = Mock(spec=X())
        self.assertTrue(isinstance(mock, X))

        self.assertIs(mock.__class__, X)
        self.assertEqual(Mock().__class__.__name__, 'Mock')

        mock = Mock(spec_set=X)
        self.assertTrue(isinstance(mock, X))

        mock = Mock(spec_set=X())
        self.assertTrue(isinstance(mock, X)) 

def test_spec_class(self):
        class X(object):
            pass

        mock = Mock(spec=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec=X())
        self.assertIsInstance(mock, X)

        self.assertIs(mock.__class__, X)
        self.assertEqual(Mock().__class__.__name__, 'Mock')

        mock = Mock(spec_set=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec_set=X())
        self.assertIsInstance(mock, X) 

def test_spec_class(self):
        class X(object):
            pass

        mock = Mock(spec=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec=X())
        self.assertIsInstance(mock, X)

        self.assertIs(mock.__class__, X)
        self.assertEqual(Mock().__class__.__name__, 'Mock')

        mock = Mock(spec_set=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec_set=X())
        self.assertIsInstance(mock, X) 

def test_spec_class(self):
        class X(object):
            pass

        mock = Mock(spec=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec=X())
        self.assertIsInstance(mock, X)

        self.assertIs(mock.__class__, X)
        self.assertEqual(Mock().__class__.__name__, 'Mock')

        mock = Mock(spec_set=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec_set=X())
        self.assertIsInstance(mock, X) 

def test_spec_class(self):
        class X(object):
            pass

        mock = Mock(spec=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec=X())
        self.assertIsInstance(mock, X)

        self.assertIs(mock.__class__, X)
        self.assertEqual(Mock().__class__.__name__, 'Mock')

        mock = Mock(spec_set=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec_set=X())
        self.assertIsInstance(mock, X) 

def test_spec_class(self):
        class X(object):
            pass

        mock = Mock(spec=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec=X())
        self.assertIsInstance(mock, X)

        self.assertIs(mock.__class__, X)
        self.assertEqual(Mock().__class__.__name__, 'Mock')

        mock = Mock(spec_set=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec_set=X())
        self.assertIsInstance(mock, X) 

def test_spec_class(self):
        class X(object):
            pass

        mock = Mock(spec=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec=X())
        self.assertIsInstance(mock, X)

        self.assertIs(mock.__class__, X)
        self.assertEqual(Mock().__class__.__name__, 'Mock')

        mock = Mock(spec_set=X)
        self.assertIsInstance(mock, X)

        mock = Mock(spec_set=X())
        self.assertIsInstance(mock, X) 

def test_class_assignable(self):
        for mock in Mock(), MagicMock():
            self.assertNotIsInstance(mock, int)

            mock.__class__ = int
            self.assertIsInstance(mock, int)
            mock.foo 

def test_class_assignable(self):
        for mock in Mock(), MagicMock():
            self.assertNotIsInstance(mock, int)

            mock.__class__ = int
            self.assertIsInstance(mock, int)
            mock.foo 

def test_class_assignable(self):
        for mock in Mock(), MagicMock():
            self.assertNotIsInstance(mock, int)

            mock.__class__ = int
            self.assertIsInstance(mock, int)
            mock.foo 

def test_class_assignable(self):
        for mock in Mock(), MagicMock():
            self.assertNotIsInstance(mock, int)

            mock.__class__ = int
            self.assertIsInstance(mock, int)
            mock.foo 

def test_class_assignable(self):
        for mock in Mock(), MagicMock():
            self.assertNotIsInstance(mock, int)

            mock.__class__ = int
            self.assertIsInstance(mock, int)
            mock.foo 

def test_class_assignable(self):
        for mock in Mock(), MagicMock():
            self.assertNotIsInstance(mock, int)

            mock.__class__ = int
            self.assertIsInstance(mock, int)
            mock.foo 

def test_isinstance_under_settrace(self):
        # bpo-36593 : __class__ is not set for a class that has __class__
        # property defined when it's used with sys.settrace(trace) set.
        # Delete the module to force reimport with tracing function set
        # restore the old reference later since there are other tests that are
        # dependent on unittest.mock.patch. In testpatch.PatchTest
        # test_patch_dict_test_prefix and test_patch_test_prefix not restoring
        # causes the objects patched to go out of sync

        old_patch = unittest.mock.patch

        # Directly using __setattr__ on unittest.mock causes current imported
        # reference to be updated. Use a lambda so that during cleanup the
        # re-imported new reference is updated.
        self.addCleanup(lambda patch: setattr(unittest.mock, 'patch', patch),
                        old_patch)

        with patch.dict('sys.modules'):
            del sys.modules['unittest.mock']

            def trace(frame, event, arg):
                return trace

            sys.settrace(trace)
            self.addCleanup(sys.settrace, None)

            from unittest.mock import (
                Mock, MagicMock, NonCallableMock, NonCallableMagicMock
            )

            mocks = [
                Mock, MagicMock, NonCallableMock, NonCallableMagicMock
            ]

            for mock in mocks:
                obj = mock(spec=Something)
                self.assertIsInstance(obj, Something) 

def test_class_assignable(self):
        for mock in Mock(), MagicMock():
            self.assertNotIsInstance(mock, int)

            mock.__class__ = int
            self.assertIsInstance(mock, int)
            mock.foo