510 lines
16 KiB
Python
510 lines
16 KiB
Python
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import math
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import unittest
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import os
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from asyncio import iscoroutinefunction
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from unittest.mock import AsyncMock, Mock, MagicMock, _magics
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class TestMockingMagicMethods(unittest.TestCase):
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def test_deleting_magic_methods(self):
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mock = Mock()
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self.assertFalse(hasattr(mock, '__getitem__'))
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mock.__getitem__ = Mock()
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self.assertTrue(hasattr(mock, '__getitem__'))
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del mock.__getitem__
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self.assertFalse(hasattr(mock, '__getitem__'))
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def test_magicmock_del(self):
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mock = MagicMock()
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# before using getitem
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del mock.__getitem__
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self.assertRaises(TypeError, lambda: mock['foo'])
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mock = MagicMock()
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# this time use it first
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mock['foo']
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del mock.__getitem__
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self.assertRaises(TypeError, lambda: mock['foo'])
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def test_magic_method_wrapping(self):
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mock = Mock()
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def f(self, name):
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return self, 'fish'
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mock.__getitem__ = f
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self.assertIsNot(mock.__getitem__, f)
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self.assertEqual(mock['foo'], (mock, 'fish'))
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self.assertEqual(mock.__getitem__('foo'), (mock, 'fish'))
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mock.__getitem__ = mock
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self.assertIs(mock.__getitem__, mock)
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def test_magic_methods_isolated_between_mocks(self):
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mock1 = Mock()
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mock2 = Mock()
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mock1.__iter__ = Mock(return_value=iter([]))
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self.assertEqual(list(mock1), [])
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self.assertRaises(TypeError, lambda: list(mock2))
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def test_repr(self):
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mock = Mock()
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self.assertEqual(repr(mock), "<Mock id='%s'>" % id(mock))
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mock.__repr__ = lambda s: 'foo'
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self.assertEqual(repr(mock), 'foo')
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def test_str(self):
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mock = Mock()
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self.assertEqual(str(mock), object.__str__(mock))
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mock.__str__ = lambda s: 'foo'
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self.assertEqual(str(mock), 'foo')
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def test_dict_methods(self):
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mock = Mock()
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self.assertRaises(TypeError, lambda: mock['foo'])
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def _del():
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del mock['foo']
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def _set():
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mock['foo'] = 3
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self.assertRaises(TypeError, _del)
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self.assertRaises(TypeError, _set)
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_dict = {}
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def getitem(s, name):
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return _dict[name]
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def setitem(s, name, value):
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_dict[name] = value
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def delitem(s, name):
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del _dict[name]
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mock.__setitem__ = setitem
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mock.__getitem__ = getitem
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mock.__delitem__ = delitem
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self.assertRaises(KeyError, lambda: mock['foo'])
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mock['foo'] = 'bar'
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self.assertEqual(_dict, {'foo': 'bar'})
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self.assertEqual(mock['foo'], 'bar')
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del mock['foo']
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self.assertEqual(_dict, {})
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def test_numeric(self):
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original = mock = Mock()
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mock.value = 0
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self.assertRaises(TypeError, lambda: mock + 3)
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def add(self, other):
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mock.value += other
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return self
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mock.__add__ = add
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self.assertEqual(mock + 3, mock)
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self.assertEqual(mock.value, 3)
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del mock.__add__
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def iadd(mock):
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mock += 3
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self.assertRaises(TypeError, iadd, mock)
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mock.__iadd__ = add
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mock += 6
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self.assertEqual(mock, original)
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self.assertEqual(mock.value, 9)
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self.assertRaises(TypeError, lambda: 3 + mock)
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mock.__radd__ = add
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self.assertEqual(7 + mock, mock)
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self.assertEqual(mock.value, 16)
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def test_division(self):
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original = mock = Mock()
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mock.value = 32
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self.assertRaises(TypeError, lambda: mock / 2)
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def truediv(self, other):
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mock.value /= other
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return self
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mock.__truediv__ = truediv
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self.assertEqual(mock / 2, mock)
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self.assertEqual(mock.value, 16)
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del mock.__truediv__
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def itruediv(mock):
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mock /= 4
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self.assertRaises(TypeError, itruediv, mock)
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mock.__itruediv__ = truediv
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mock /= 8
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self.assertEqual(mock, original)
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self.assertEqual(mock.value, 2)
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self.assertRaises(TypeError, lambda: 8 / mock)
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mock.__rtruediv__ = truediv
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self.assertEqual(0.5 / mock, mock)
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self.assertEqual(mock.value, 4)
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def test_hash(self):
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mock = Mock()
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# test delegation
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self.assertEqual(hash(mock), Mock.__hash__(mock))
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def _hash(s):
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return 3
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mock.__hash__ = _hash
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self.assertEqual(hash(mock), 3)
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def test_nonzero(self):
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m = Mock()
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self.assertTrue(bool(m))
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m.__bool__ = lambda s: False
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self.assertFalse(bool(m))
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def test_comparison(self):
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mock = Mock()
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def comp(s, o):
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return True
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mock.__lt__ = mock.__gt__ = mock.__le__ = mock.__ge__ = comp
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self. assertTrue(mock < 3)
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self. assertTrue(mock > 3)
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self. assertTrue(mock <= 3)
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self. assertTrue(mock >= 3)
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self.assertRaises(TypeError, lambda: MagicMock() < object())
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self.assertRaises(TypeError, lambda: object() < MagicMock())
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self.assertRaises(TypeError, lambda: MagicMock() < MagicMock())
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self.assertRaises(TypeError, lambda: MagicMock() > object())
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self.assertRaises(TypeError, lambda: object() > MagicMock())
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self.assertRaises(TypeError, lambda: MagicMock() > MagicMock())
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self.assertRaises(TypeError, lambda: MagicMock() <= object())
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self.assertRaises(TypeError, lambda: object() <= MagicMock())
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self.assertRaises(TypeError, lambda: MagicMock() <= MagicMock())
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self.assertRaises(TypeError, lambda: MagicMock() >= object())
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self.assertRaises(TypeError, lambda: object() >= MagicMock())
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self.assertRaises(TypeError, lambda: MagicMock() >= MagicMock())
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def test_equality(self):
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for mock in Mock(), MagicMock():
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self.assertEqual(mock == mock, True)
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self.assertIsInstance(mock == mock, bool)
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self.assertEqual(mock != mock, False)
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self.assertIsInstance(mock != mock, bool)
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self.assertEqual(mock == object(), False)
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self.assertEqual(mock != object(), True)
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def eq(self, other):
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return other == 3
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mock.__eq__ = eq
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self.assertTrue(mock == 3)
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self.assertFalse(mock == 4)
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def ne(self, other):
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return other == 3
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mock.__ne__ = ne
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self.assertTrue(mock != 3)
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self.assertFalse(mock != 4)
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mock = MagicMock()
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mock.__eq__.return_value = True
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self.assertIsInstance(mock == 3, bool)
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self.assertEqual(mock == 3, True)
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mock.__ne__.return_value = False
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self.assertIsInstance(mock != 3, bool)
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self.assertEqual(mock != 3, False)
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def test_len_contains_iter(self):
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mock = Mock()
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self.assertRaises(TypeError, len, mock)
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self.assertRaises(TypeError, iter, mock)
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self.assertRaises(TypeError, lambda: 'foo' in mock)
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mock.__len__ = lambda s: 6
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self.assertEqual(len(mock), 6)
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mock.__contains__ = lambda s, o: o == 3
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self.assertIn(3, mock)
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self.assertNotIn(6, mock)
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mock.__iter__ = lambda s: iter('foobarbaz')
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self.assertEqual(list(mock), list('foobarbaz'))
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def test_magicmock(self):
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mock = MagicMock()
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mock.__iter__.return_value = iter([1, 2, 3])
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self.assertEqual(list(mock), [1, 2, 3])
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getattr(mock, '__bool__').return_value = False
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self.assertFalse(hasattr(mock, '__nonzero__'))
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self.assertFalse(bool(mock))
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for entry in _magics:
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self.assertTrue(hasattr(mock, entry))
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self.assertFalse(hasattr(mock, '__imaginary__'))
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def test_magic_mock_equality(self):
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mock = MagicMock()
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self.assertIsInstance(mock == object(), bool)
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self.assertIsInstance(mock != object(), bool)
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self.assertEqual(mock == object(), False)
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self.assertEqual(mock != object(), True)
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self.assertEqual(mock == mock, True)
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self.assertEqual(mock != mock, False)
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def test_asyncmock_defaults(self):
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mock = AsyncMock()
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self.assertEqual(int(mock), 1)
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self.assertEqual(complex(mock), 1j)
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self.assertEqual(float(mock), 1.0)
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self.assertNotIn(object(), mock)
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self.assertEqual(len(mock), 0)
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self.assertEqual(list(mock), [])
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self.assertEqual(hash(mock), object.__hash__(mock))
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self.assertEqual(str(mock), object.__str__(mock))
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self.assertTrue(bool(mock))
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self.assertEqual(round(mock), mock.__round__())
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self.assertEqual(math.trunc(mock), mock.__trunc__())
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self.assertEqual(math.floor(mock), mock.__floor__())
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self.assertEqual(math.ceil(mock), mock.__ceil__())
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self.assertTrue(iscoroutinefunction(mock.__aexit__))
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self.assertTrue(iscoroutinefunction(mock.__aenter__))
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self.assertIsInstance(mock.__aenter__, AsyncMock)
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self.assertIsInstance(mock.__aexit__, AsyncMock)
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# in Python 3 oct and hex use __index__
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# so these tests are for __index__ in py3k
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self.assertEqual(oct(mock), '0o1')
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self.assertEqual(hex(mock), '0x1')
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# how to test __sizeof__ ?
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def test_magicmock_defaults(self):
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mock = MagicMock()
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self.assertEqual(int(mock), 1)
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self.assertEqual(complex(mock), 1j)
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self.assertEqual(float(mock), 1.0)
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self.assertNotIn(object(), mock)
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self.assertEqual(len(mock), 0)
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self.assertEqual(list(mock), [])
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self.assertEqual(hash(mock), object.__hash__(mock))
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self.assertEqual(str(mock), object.__str__(mock))
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self.assertTrue(bool(mock))
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self.assertEqual(round(mock), mock.__round__())
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self.assertEqual(math.trunc(mock), mock.__trunc__())
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self.assertEqual(math.floor(mock), mock.__floor__())
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self.assertEqual(math.ceil(mock), mock.__ceil__())
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self.assertTrue(iscoroutinefunction(mock.__aexit__))
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self.assertTrue(iscoroutinefunction(mock.__aenter__))
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self.assertIsInstance(mock.__aenter__, AsyncMock)
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self.assertIsInstance(mock.__aexit__, AsyncMock)
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# in Python 3 oct and hex use __index__
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# so these tests are for __index__ in py3k
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self.assertEqual(oct(mock), '0o1')
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self.assertEqual(hex(mock), '0x1')
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# how to test __sizeof__ ?
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def test_magic_methods_fspath(self):
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mock = MagicMock()
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expected_path = mock.__fspath__()
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mock.reset_mock()
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self.assertEqual(os.fspath(mock), expected_path)
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mock.__fspath__.assert_called_once()
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def test_magic_methods_and_spec(self):
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class Iterable(object):
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def __iter__(self): pass
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mock = Mock(spec=Iterable)
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self.assertRaises(AttributeError, lambda: mock.__iter__)
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mock.__iter__ = Mock(return_value=iter([]))
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self.assertEqual(list(mock), [])
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class NonIterable(object):
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pass
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mock = Mock(spec=NonIterable)
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self.assertRaises(AttributeError, lambda: mock.__iter__)
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def set_int():
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mock.__int__ = Mock(return_value=iter([]))
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self.assertRaises(AttributeError, set_int)
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mock = MagicMock(spec=Iterable)
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self.assertEqual(list(mock), [])
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self.assertRaises(AttributeError, set_int)
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def test_magic_methods_and_spec_set(self):
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class Iterable(object):
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def __iter__(self): pass
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mock = Mock(spec_set=Iterable)
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self.assertRaises(AttributeError, lambda: mock.__iter__)
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mock.__iter__ = Mock(return_value=iter([]))
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self.assertEqual(list(mock), [])
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class NonIterable(object):
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pass
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mock = Mock(spec_set=NonIterable)
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self.assertRaises(AttributeError, lambda: mock.__iter__)
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def set_int():
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mock.__int__ = Mock(return_value=iter([]))
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self.assertRaises(AttributeError, set_int)
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mock = MagicMock(spec_set=Iterable)
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self.assertEqual(list(mock), [])
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self.assertRaises(AttributeError, set_int)
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def test_setting_unsupported_magic_method(self):
|
||
|
|
mock = MagicMock()
|
||
|
|
def set_setattr():
|
||
|
|
mock.__setattr__ = lambda self, name: None
|
||
|
|
self.assertRaisesRegex(AttributeError,
|
||
|
|
"Attempting to set unsupported magic method '__setattr__'.",
|
||
|
|
set_setattr
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def test_attributes_and_return_value(self):
|
||
|
|
mock = MagicMock()
|
||
|
|
attr = mock.foo
|
||
|
|
def _get_type(obj):
|
||
|
|
# the type of every mock (or magicmock) is a custom subclass
|
||
|
|
# so the real type is the second in the mro
|
||
|
|
return type(obj).__mro__[1]
|
||
|
|
self.assertEqual(_get_type(attr), MagicMock)
|
||
|
|
|
||
|
|
returned = mock()
|
||
|
|
self.assertEqual(_get_type(returned), MagicMock)
|
||
|
|
|
||
|
|
|
||
|
|
def test_magic_methods_are_magic_mocks(self):
|
||
|
|
mock = MagicMock()
|
||
|
|
self.assertIsInstance(mock.__getitem__, MagicMock)
|
||
|
|
|
||
|
|
mock[1][2].__getitem__.return_value = 3
|
||
|
|
self.assertEqual(mock[1][2][3], 3)
|
||
|
|
|
||
|
|
|
||
|
|
def test_magic_method_reset_mock(self):
|
||
|
|
mock = MagicMock()
|
||
|
|
str(mock)
|
||
|
|
self.assertTrue(mock.__str__.called)
|
||
|
|
mock.reset_mock()
|
||
|
|
self.assertFalse(mock.__str__.called)
|
||
|
|
|
||
|
|
|
||
|
|
def test_dir(self):
|
||
|
|
# overriding the default implementation
|
||
|
|
for mock in Mock(), MagicMock():
|
||
|
|
def _dir(self):
|
||
|
|
return ['foo']
|
||
|
|
mock.__dir__ = _dir
|
||
|
|
self.assertEqual(dir(mock), ['foo'])
|
||
|
|
|
||
|
|
|
||
|
|
def test_bound_methods(self):
|
||
|
|
m = Mock()
|
||
|
|
|
||
|
|
# XXXX should this be an expected failure instead?
|
||
|
|
|
||
|
|
# this seems like it should work, but is hard to do without introducing
|
||
|
|
# other api inconsistencies. Failure message could be better though.
|
||
|
|
m.__iter__ = [3].__iter__
|
||
|
|
self.assertRaises(TypeError, iter, m)
|
||
|
|
|
||
|
|
|
||
|
|
def test_magic_method_type(self):
|
||
|
|
class Foo(MagicMock):
|
||
|
|
pass
|
||
|
|
|
||
|
|
foo = Foo()
|
||
|
|
self.assertIsInstance(foo.__int__, Foo)
|
||
|
|
|
||
|
|
|
||
|
|
def test_descriptor_from_class(self):
|
||
|
|
m = MagicMock()
|
||
|
|
type(m).__str__.return_value = 'foo'
|
||
|
|
self.assertEqual(str(m), 'foo')
|
||
|
|
|
||
|
|
|
||
|
|
def test_iterable_as_iter_return_value(self):
|
||
|
|
m = MagicMock()
|
||
|
|
m.__iter__.return_value = [1, 2, 3]
|
||
|
|
self.assertEqual(list(m), [1, 2, 3])
|
||
|
|
self.assertEqual(list(m), [1, 2, 3])
|
||
|
|
|
||
|
|
m.__iter__.return_value = iter([4, 5, 6])
|
||
|
|
self.assertEqual(list(m), [4, 5, 6])
|
||
|
|
self.assertEqual(list(m), [])
|
||
|
|
|
||
|
|
|
||
|
|
def test_matmul(self):
|
||
|
|
m = MagicMock()
|
||
|
|
self.assertIsInstance(m @ 1, MagicMock)
|
||
|
|
m.__matmul__.return_value = 42
|
||
|
|
m.__rmatmul__.return_value = 666
|
||
|
|
m.__imatmul__.return_value = 24
|
||
|
|
self.assertEqual(m @ 1, 42)
|
||
|
|
self.assertEqual(1 @ m, 666)
|
||
|
|
m @= 24
|
||
|
|
self.assertEqual(m, 24)
|
||
|
|
|
||
|
|
def test_divmod_and_rdivmod(self):
|
||
|
|
m = MagicMock()
|
||
|
|
self.assertIsInstance(divmod(5, m), MagicMock)
|
||
|
|
m.__divmod__.return_value = (2, 1)
|
||
|
|
self.assertEqual(divmod(m, 2), (2, 1))
|
||
|
|
m = MagicMock()
|
||
|
|
foo = divmod(2, m)
|
||
|
|
self.assertIsInstance(foo, MagicMock)
|
||
|
|
foo_direct = m.__divmod__(2)
|
||
|
|
self.assertIsInstance(foo_direct, MagicMock)
|
||
|
|
bar = divmod(m, 2)
|
||
|
|
self.assertIsInstance(bar, MagicMock)
|
||
|
|
bar_direct = m.__rdivmod__(2)
|
||
|
|
self.assertIsInstance(bar_direct, MagicMock)
|
||
|
|
|
||
|
|
# http://bugs.python.org/issue23310
|
||
|
|
# Check if you can change behaviour of magic methods in MagicMock init
|
||
|
|
def test_magic_in_initialization(self):
|
||
|
|
m = MagicMock(**{'__str__.return_value': "12"})
|
||
|
|
self.assertEqual(str(m), "12")
|
||
|
|
|
||
|
|
def test_changing_magic_set_in_initialization(self):
|
||
|
|
m = MagicMock(**{'__str__.return_value': "12"})
|
||
|
|
m.__str__.return_value = "13"
|
||
|
|
self.assertEqual(str(m), "13")
|
||
|
|
m = MagicMock(**{'__str__.return_value': "12"})
|
||
|
|
m.configure_mock(**{'__str__.return_value': "14"})
|
||
|
|
self.assertEqual(str(m), "14")
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
unittest.main()
|