181 lines
5 KiB
Python
181 lines
5 KiB
Python
import unittest
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from unittest import mock
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class SampleObject:
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def __init__(self):
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self.attr_sample1 = 1
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self.attr_sample2 = 1
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def method_sample1(self):
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pass
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def method_sample2(self):
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pass
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class TestSealable(unittest.TestCase):
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def test_attributes_return_more_mocks_by_default(self):
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m = mock.Mock()
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self.assertIsInstance(m.test, mock.Mock)
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self.assertIsInstance(m.test(), mock.Mock)
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self.assertIsInstance(m.test().test2(), mock.Mock)
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def test_new_attributes_cannot_be_accessed_on_seal(self):
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m = mock.Mock()
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mock.seal(m)
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with self.assertRaises(AttributeError):
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m.test
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with self.assertRaises(AttributeError):
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m()
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def test_new_attributes_cannot_be_set_on_seal(self):
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m = mock.Mock()
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mock.seal(m)
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with self.assertRaises(AttributeError):
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m.test = 1
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def test_existing_attributes_can_be_set_on_seal(self):
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m = mock.Mock()
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m.test.test2 = 1
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mock.seal(m)
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m.test.test2 = 2
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self.assertEqual(m.test.test2, 2)
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def test_new_attributes_cannot_be_set_on_child_of_seal(self):
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m = mock.Mock()
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m.test.test2 = 1
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mock.seal(m)
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with self.assertRaises(AttributeError):
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m.test.test3 = 1
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def test_existing_attributes_allowed_after_seal(self):
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m = mock.Mock()
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m.test.return_value = 3
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mock.seal(m)
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self.assertEqual(m.test(), 3)
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def test_initialized_attributes_allowed_after_seal(self):
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m = mock.Mock(test_value=1)
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mock.seal(m)
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self.assertEqual(m.test_value, 1)
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def test_call_on_sealed_mock_fails(self):
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m = mock.Mock()
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mock.seal(m)
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with self.assertRaises(AttributeError):
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m()
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def test_call_on_defined_sealed_mock_succeeds(self):
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m = mock.Mock(return_value=5)
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mock.seal(m)
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self.assertEqual(m(), 5)
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def test_seals_recurse_on_added_attributes(self):
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m = mock.Mock()
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m.test1.test2().test3 = 4
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mock.seal(m)
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self.assertEqual(m.test1.test2().test3, 4)
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with self.assertRaises(AttributeError):
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m.test1.test2().test4
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with self.assertRaises(AttributeError):
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m.test1.test3
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def test_seals_recurse_on_magic_methods(self):
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m = mock.MagicMock()
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m.test1.test2["a"].test3 = 4
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m.test1.test3[2:5].test3 = 4
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mock.seal(m)
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self.assertEqual(m.test1.test2["a"].test3, 4)
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self.assertEqual(m.test1.test2[2:5].test3, 4)
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with self.assertRaises(AttributeError):
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m.test1.test2["a"].test4
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with self.assertRaises(AttributeError):
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m.test1.test3[2:5].test4
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def test_seals_dont_recurse_on_manual_attributes(self):
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m = mock.Mock(name="root_mock")
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m.test1.test2 = mock.Mock(name="not_sealed")
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m.test1.test2.test3 = 4
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mock.seal(m)
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self.assertEqual(m.test1.test2.test3, 4)
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m.test1.test2.test4 # Does not raise
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m.test1.test2.test4 = 1 # Does not raise
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def test_integration_with_spec_att_definition(self):
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"""You are not restricted when using mock with spec"""
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m = mock.Mock(SampleObject)
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m.attr_sample1 = 1
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m.attr_sample3 = 3
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mock.seal(m)
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self.assertEqual(m.attr_sample1, 1)
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self.assertEqual(m.attr_sample3, 3)
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with self.assertRaises(AttributeError):
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m.attr_sample2
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def test_integration_with_spec_method_definition(self):
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"""You need to defin the methods, even if they are in the spec"""
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m = mock.Mock(SampleObject)
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m.method_sample1.return_value = 1
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mock.seal(m)
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self.assertEqual(m.method_sample1(), 1)
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with self.assertRaises(AttributeError):
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m.method_sample2()
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def test_integration_with_spec_method_definition_respects_spec(self):
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"""You cannot define methods out of the spec"""
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m = mock.Mock(SampleObject)
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with self.assertRaises(AttributeError):
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m.method_sample3.return_value = 3
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def test_sealed_exception_has_attribute_name(self):
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m = mock.Mock()
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mock.seal(m)
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with self.assertRaises(AttributeError) as cm:
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m.SECRETE_name
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self.assertIn("SECRETE_name", str(cm.exception))
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def test_attribute_chain_is_maintained(self):
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m = mock.Mock(name="mock_name")
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m.test1.test2.test3.test4
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mock.seal(m)
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with self.assertRaises(AttributeError) as cm:
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m.test1.test2.test3.test4.boom
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self.assertIn("mock_name.test1.test2.test3.test4.boom", str(cm.exception))
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def test_call_chain_is_maintained(self):
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m = mock.Mock()
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m.test1().test2.test3().test4
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mock.seal(m)
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with self.assertRaises(AttributeError) as cm:
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m.test1().test2.test3().test4()
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self.assertIn("mock.test1().test2.test3().test4", str(cm.exception))
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if __name__ == "__main__":
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unittest.main()
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