def test_attribute_access_returns_mocks(self):
mock = Mock()
something = mock.something
self.assertTrue(is_instance(something, Mock), "attribute isn't a mock")
self.assertEqual(mock.something, something,
"different attributes returned for same name")
# Usage example
mock = Mock()
mock.something.return_value = 3
self.assertEqual(mock.something(), 3, "method returned wrong value")
self.assertTrue(mock.something.called,
"method didn't record being called")
python类return_value()的实例源码
def test_wraps_call_with_nondefault_return_value(self):
real = Mock()
mock = Mock(wraps=real)
mock.return_value = 3
self.assertEqual(mock(), 3)
self.assertFalse(real.called)
def test_side_effect_iterator_default(self):
mock = Mock(return_value=2)
mock.side_effect = iter([1, DEFAULT])
self.assertEqual([mock(), mock()], [1, 2])
def test_mock_add_spec_magic_methods(self):
for Klass in MagicMock, NonCallableMagicMock:
mock = Klass()
int(mock)
mock.mock_add_spec(object)
self.assertRaises(TypeError, int, mock)
mock = Klass()
mock['foo']
mock.__int__.return_value =4
mock.mock_add_spec(int)
self.assertEqual(int(mock), 4)
self.assertRaises(TypeError, lambda: mock['foo'])
def test_magic_methods_mock_calls(self):
for Klass in Mock, MagicMock:
m = Klass()
m.__int__ = Mock(return_value=3)
m.__float__ = MagicMock(return_value=3.0)
int(m)
float(m)
self.assertEqual(m.mock_calls, [call.__int__(), call.__float__()])
self.assertEqual(m.method_calls, [])
def test_mock_open_write(self):
# Test exception in file writing write()
mock_namedtemp = mock.mock_open(mock.MagicMock(name='JLV'))
with mock.patch('tempfile.NamedTemporaryFile', mock_namedtemp):
mock_filehandle = mock_namedtemp.return_value
mock_write = mock_filehandle.write
mock_write.side_effect = OSError('Test 2 Error')
def attempt():
tempfile.NamedTemporaryFile().write('asd')
self.assertRaises(OSError, attempt)
def test_mock_open_alter_readline(self):
mopen = mock.mock_open(read_data='foo\nbarn')
mopen.return_value.readline.side_effect = lambda *args:'abc'
first = mopen().readline()
second = mopen().readline()
self.assertEqual('abc', first)
self.assertEqual('abc', second)
def test_mock_parents(self):
for Klass in Mock, MagicMock:
m = Klass()
original_repr = repr(m)
m.return_value = m
self.assertIs(m(), m)
self.assertEqual(repr(m), original_repr)
m.reset_mock()
self.assertIs(m(), m)
self.assertEqual(repr(m), original_repr)
m = Klass()
m.b = m.a
self.assertIn("name='mock.a'", repr(m.b))
self.assertIn("name='mock.a'", repr(m.a))
m.reset_mock()
self.assertIn("name='mock.a'", repr(m.b))
self.assertIn("name='mock.a'", repr(m.a))
m = Klass()
original_repr = repr(m)
m.a = m()
m.a.return_value = m
self.assertEqual(repr(m), original_repr)
self.assertEqual(repr(m.a()), original_repr)
def test_attach_mock_return_value(self):
classes = Mock, MagicMock, NonCallableMagicMock, NonCallableMock
for Klass in Mock, MagicMock:
for Klass2 in classes:
m = Klass()
m2 = Klass2(name='foo')
m.attach_mock(m2, 'return_value')
self.assertIs(m(), m2)
self.assertIn("name='mock()'", repr(m2))
m2.foo()
self.assertEqual(m.mock_calls, call().foo().call_list())
def test_run_execute_func_for_fmin(self, mock):
mock.return_value = {'x1': 2, 'x2': 1}
c = Configuration(configuration_space=self.cs, values={})
target = lambda x: x[0] ** 2 + x[1]
taf = ExecuteTAFuncArray(target, stats=self.stats)
rval = taf._call_ta(target, c)
self.assertEqual(rval, 5)
def test_constructor(self):
mock = Mock()
self.assertFalse(mock.called, "called not initialised correctly")
self.assertEqual(mock.call_count, 0,
"call_count not initialised correctly")
self.assertTrue(is_instance(mock.return_value, Mock),
"return_value not initialised correctly")
self.assertEqual(mock.call_args, None,
"call_args not initialised correctly")
self.assertEqual(mock.call_args_list, [],
"call_args_list not initialised correctly")
self.assertEqual(mock.method_calls, [],
"method_calls not initialised correctly")
# Can't use hasattr for this test as it always returns True on a mock
self.assertNotIn('_items', mock.__dict__,
"default mock should not have '_items' attribute")
self.assertIsNone(mock._mock_parent,
"parent not initialised correctly")
self.assertIsNone(mock._mock_methods,
"methods not initialised correctly")
self.assertEqual(mock._mock_children, {},
"children not initialised incorrectly")
def test_return_value_in_constructor(self):
mock = Mock(return_value=None)
self.assertIsNone(mock.return_value,
"return value in constructor not honoured")
def test_side_effect(self):
mock = Mock()
def effect(*args, **kwargs):
raise SystemError('kablooie')
mock.side_effect = effect
self.assertRaises(SystemError, mock, 1, 2, fish=3)
mock.assert_called_with(1, 2, fish=3)
results = [1, 2, 3]
def effect():
return results.pop()
mock.side_effect = effect
self.assertEqual([mock(), mock(), mock()], [3, 2, 1],
"side effect not used correctly")
mock = Mock(side_effect=sentinel.SideEffect)
self.assertEqual(mock.side_effect, sentinel.SideEffect,
"side effect in constructor not used")
def side_effect():
return DEFAULT
mock = Mock(side_effect=side_effect, return_value=sentinel.RETURN)
self.assertEqual(mock(), sentinel.RETURN)
def test_reset_mock(self):
parent = Mock()
spec = ["something"]
mock = Mock(name="child", parent=parent, spec=spec)
mock(sentinel.Something, something=sentinel.SomethingElse)
something = mock.something
mock.something()
mock.side_effect = sentinel.SideEffect
return_value = mock.return_value
return_value()
mock.reset_mock()
self.assertEqual(mock._mock_name, "child",
"name incorrectly reset")
self.assertEqual(mock._mock_parent, parent,
"parent incorrectly reset")
self.assertEqual(mock._mock_methods, spec,
"methods incorrectly reset")
self.assertFalse(mock.called, "called not reset")
self.assertEqual(mock.call_count, 0, "call_count not reset")
self.assertEqual(mock.call_args, None, "call_args not reset")
self.assertEqual(mock.call_args_list, [], "call_args_list not reset")
self.assertEqual(mock.method_calls, [],
"method_calls not initialised correctly: %r != %r" %
(mock.method_calls, []))
self.assertEqual(mock.mock_calls, [])
self.assertEqual(mock.side_effect, sentinel.SideEffect,
"side_effect incorrectly reset")
self.assertEqual(mock.return_value, return_value,
"return_value incorrectly reset")
self.assertFalse(return_value.called, "return value mock not reset")
self.assertEqual(mock._mock_children, {'something': something},
"children reset incorrectly")
self.assertEqual(mock.something, something,
"children incorrectly cleared")
self.assertFalse(mock.something.called, "child not reset")
def test_reset_mock_recursion(self):
mock = Mock()
mock.return_value = mock
# used to cause recursion
mock.reset_mock()
def test_attribute_access_returns_mocks(self):
mock = Mock()
something = mock.something
self.assertTrue(is_instance(something, Mock), "attribute isn't a mock")
self.assertEqual(mock.something, something,
"different attributes returned for same name")
# Usage example
mock = Mock()
mock.something.return_value = 3
self.assertEqual(mock.something(), 3, "method returned wrong value")
self.assertTrue(mock.something.called,
"method didn't record being called")
def test_wraps_call_with_nondefault_return_value(self):
real = Mock()
mock = Mock(wraps=real)
mock.return_value = 3
self.assertEqual(mock(), 3)
self.assertFalse(real.called)
def test_side_effect_iterator_default(self):
mock = Mock(return_value=2)
mock.side_effect = iter([1, DEFAULT])
self.assertEqual([mock(), mock()], [1, 2])
def test_mock_add_spec_magic_methods(self):
for Klass in MagicMock, NonCallableMagicMock:
mock = Klass()
int(mock)
mock.mock_add_spec(object)
self.assertRaises(TypeError, int, mock)
mock = Klass()
mock['foo']
mock.__int__.return_value =4
mock.mock_add_spec(int)
self.assertEqual(int(mock), 4)
self.assertRaises(TypeError, lambda: mock['foo'])
def test_magic_methods_mock_calls(self):
for Klass in Mock, MagicMock:
m = Klass()
m.__int__ = Mock(return_value=3)
m.__float__ = MagicMock(return_value=3.0)
int(m)
float(m)
self.assertEqual(m.mock_calls, [call.__int__(), call.__float__()])
self.assertEqual(m.method_calls, [])
