PEP 417: Adding unittest.mock
diff --git a/Lib/unittest/test/testmock/testmock.py b/Lib/unittest/test/testmock/testmock.py
new file mode 100644
index 0000000..07d8cbd
--- /dev/null
+++ b/Lib/unittest/test/testmock/testmock.py
@@ -0,0 +1,1258 @@
+import copy
+import sys
+
+import unittest
+from unittest.test.testmock.support import is_instance
+from unittest import mock
+from unittest.mock import (
+ call, DEFAULT, patch, sentinel,
+ MagicMock, Mock, NonCallableMock,
+ NonCallableMagicMock, _CallList,
+ create_autospec
+)
+
+
+class Iter(object):
+ def __init__(self):
+ self.thing = iter(['this', 'is', 'an', 'iter'])
+
+ def __iter__(self):
+ return self
+
+ def next(self):
+ return next(self.thing)
+
+ __next__ = next
+
+
+
+class MockTest(unittest.TestCase):
+
+ def test_all(self):
+ # if __all__ is badly defined then import * will raise an error
+ # We have to exec it because you can't import * inside a method
+ # in Python 3
+ exec("from mock import *")
+
+
+ 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.assertFalse('_items' in 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_repr(self):
+ mock = Mock(name='foo')
+ self.assertIn('foo', repr(mock))
+ self.assertIn("'%s'" % id(mock), repr(mock))
+
+ mocks = [(Mock(), 'mock'), (Mock(name='bar'), 'bar')]
+ for mock, name in mocks:
+ self.assertIn('%s.bar' % name, repr(mock.bar))
+ self.assertIn('%s.foo()' % name, repr(mock.foo()))
+ self.assertIn('%s.foo().bing' % name, repr(mock.foo().bing))
+ self.assertIn('%s()' % name, repr(mock()))
+ self.assertIn('%s()()' % name, repr(mock()()))
+ self.assertIn('%s()().foo.bar.baz().bing' % name,
+ repr(mock()().foo.bar.baz().bing))
+
+
+ def test_repr_with_spec(self):
+ class X(object):
+ pass
+
+ mock = Mock(spec=X)
+ self.assertIn(" spec='X' ", repr(mock))
+
+ mock = Mock(spec=X())
+ self.assertIn(" spec='X' ", repr(mock))
+
+ mock = Mock(spec_set=X)
+ self.assertIn(" spec_set='X' ", repr(mock))
+
+ mock = Mock(spec_set=X())
+ self.assertIn(" spec_set='X' ", repr(mock))
+
+ mock = Mock(spec=X, name='foo')
+ self.assertIn(" spec='X' ", repr(mock))
+ self.assertIn(" name='foo' ", repr(mock))
+
+ mock = Mock(name='foo')
+ self.assertNotIn("spec", repr(mock))
+
+ mock = Mock()
+ self.assertNotIn("spec", repr(mock))
+
+ mock = Mock(spec=['foo'])
+ self.assertNotIn("spec", repr(mock))
+
+
+ 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)
+
+
+ @unittest.skipUnless('java' in sys.platform,
+ 'This test only applies to Jython')
+ def test_java_exception_side_effect(self):
+ import java
+ mock = Mock(side_effect=java.lang.RuntimeException("Boom!"))
+
+ # can't use assertRaises with java exceptions
+ try:
+ mock(1, 2, fish=3)
+ except java.lang.RuntimeException:
+ pass
+ else:
+ self.fail('java exception not raised')
+ mock.assert_called_with(1,2, fish=3)
+
+
+ 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_call(self):
+ mock = Mock()
+ self.assertTrue(is_instance(mock.return_value, Mock),
+ "Default return_value should be a Mock")
+
+ result = mock()
+ self.assertEqual(mock(), result,
+ "different result from consecutive calls")
+ mock.reset_mock()
+
+ ret_val = mock(sentinel.Arg)
+ self.assertTrue(mock.called, "called not set")
+ self.assertEqual(mock.call_count, 1, "call_count incoreect")
+ self.assertEqual(mock.call_args, ((sentinel.Arg,), {}),
+ "call_args not set")
+ self.assertEqual(mock.call_args_list, [((sentinel.Arg,), {})],
+ "call_args_list not initialised correctly")
+
+ mock.return_value = sentinel.ReturnValue
+ ret_val = mock(sentinel.Arg, key=sentinel.KeyArg)
+ self.assertEqual(ret_val, sentinel.ReturnValue,
+ "incorrect return value")
+
+ self.assertEqual(mock.call_count, 2, "call_count incorrect")
+ self.assertEqual(mock.call_args,
+ ((sentinel.Arg,), {'key': sentinel.KeyArg}),
+ "call_args not set")
+ self.assertEqual(mock.call_args_list, [
+ ((sentinel.Arg,), {}),
+ ((sentinel.Arg,), {'key': sentinel.KeyArg})
+ ],
+ "call_args_list not set")
+
+
+ def test_call_args_comparison(self):
+ mock = Mock()
+ mock()
+ mock(sentinel.Arg)
+ mock(kw=sentinel.Kwarg)
+ mock(sentinel.Arg, kw=sentinel.Kwarg)
+ self.assertEqual(mock.call_args_list, [
+ (),
+ ((sentinel.Arg,),),
+ ({"kw": sentinel.Kwarg},),
+ ((sentinel.Arg,), {"kw": sentinel.Kwarg})
+ ])
+ self.assertEqual(mock.call_args,
+ ((sentinel.Arg,), {"kw": sentinel.Kwarg}))
+
+
+ def test_assert_called_with(self):
+ mock = Mock()
+ mock()
+
+ # Will raise an exception if it fails
+ mock.assert_called_with()
+ self.assertRaises(AssertionError, mock.assert_called_with, 1)
+
+ mock.reset_mock()
+ self.assertRaises(AssertionError, mock.assert_called_with)
+
+ mock(1, 2, 3, a='fish', b='nothing')
+ mock.assert_called_with(1, 2, 3, a='fish', b='nothing')
+
+
+ def test_assert_called_once_with(self):
+ mock = Mock()
+ mock()
+
+ # Will raise an exception if it fails
+ mock.assert_called_once_with()
+
+ mock()
+ self.assertRaises(AssertionError, mock.assert_called_once_with)
+
+ mock.reset_mock()
+ self.assertRaises(AssertionError, mock.assert_called_once_with)
+
+ mock('foo', 'bar', baz=2)
+ mock.assert_called_once_with('foo', 'bar', baz=2)
+
+ mock.reset_mock()
+ mock('foo', 'bar', baz=2)
+ self.assertRaises(
+ AssertionError,
+ lambda: mock.assert_called_once_with('bob', 'bar', baz=2)
+ )
+
+
+ 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_attributes_have_name_and_parent_set(self):
+ mock = Mock()
+ something = mock.something
+
+ self.assertEqual(something._mock_name, "something",
+ "attribute name not set correctly")
+ self.assertEqual(something._mock_parent, mock,
+ "attribute parent not set correctly")
+
+
+ def test_method_calls_recorded(self):
+ mock = Mock()
+ mock.something(3, fish=None)
+ mock.something_else.something(6, cake=sentinel.Cake)
+
+ self.assertEqual(mock.something_else.method_calls,
+ [("something", (6,), {'cake': sentinel.Cake})],
+ "method calls not recorded correctly")
+ self.assertEqual(mock.method_calls, [
+ ("something", (3,), {'fish': None}),
+ ("something_else.something", (6,), {'cake': sentinel.Cake})
+ ],
+ "method calls not recorded correctly")
+
+
+ def test_method_calls_compare_easily(self):
+ mock = Mock()
+ mock.something()
+ self.assertEqual(mock.method_calls, [('something',)])
+ self.assertEqual(mock.method_calls, [('something', (), {})])
+
+ mock = Mock()
+ mock.something('different')
+ self.assertEqual(mock.method_calls, [('something', ('different',))])
+ self.assertEqual(mock.method_calls,
+ [('something', ('different',), {})])
+
+ mock = Mock()
+ mock.something(x=1)
+ self.assertEqual(mock.method_calls, [('something', {'x': 1})])
+ self.assertEqual(mock.method_calls, [('something', (), {'x': 1})])
+
+ mock = Mock()
+ mock.something('different', some='more')
+ self.assertEqual(mock.method_calls, [
+ ('something', ('different',), {'some': 'more'})
+ ])
+
+
+ def test_only_allowed_methods_exist(self):
+ for spec in ['something'], ('something',):
+ for arg in 'spec', 'spec_set':
+ mock = Mock(**{arg: spec})
+
+ # this should be allowed
+ mock.something
+ self.assertRaisesRegex(
+ AttributeError,
+ "Mock object has no attribute 'something_else'",
+ getattr, mock, 'something_else'
+ )
+
+
+ def test_from_spec(self):
+ class Something(object):
+ x = 3
+ __something__ = None
+ def y(self):
+ pass
+
+ def test_attributes(mock):
+ # should work
+ mock.x
+ mock.y
+ mock.__something__
+ self.assertRaisesRegex(
+ AttributeError,
+ "Mock object has no attribute 'z'",
+ getattr, mock, 'z'
+ )
+ self.assertRaisesRegex(
+ AttributeError,
+ "Mock object has no attribute '__foobar__'",
+ getattr, mock, '__foobar__'
+ )
+
+ test_attributes(Mock(spec=Something))
+ test_attributes(Mock(spec=Something()))
+
+
+ def test_wraps_calls(self):
+ real = Mock()
+
+ mock = Mock(wraps=real)
+ self.assertEqual(mock(), real())
+
+ real.reset_mock()
+
+ mock(1, 2, fish=3)
+ real.assert_called_with(1, 2, fish=3)
+
+
+ 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_wraps_attributes(self):
+ class Real(object):
+ attribute = Mock()
+
+ real = Real()
+
+ mock = Mock(wraps=real)
+ self.assertEqual(mock.attribute(), real.attribute())
+ self.assertRaises(AttributeError, lambda: mock.fish)
+
+ self.assertNotEqual(mock.attribute, real.attribute)
+ result = mock.attribute.frog(1, 2, fish=3)
+ Real.attribute.frog.assert_called_with(1, 2, fish=3)
+ self.assertEqual(result, Real.attribute.frog())
+
+
+ def test_exceptional_side_effect(self):
+ mock = Mock(side_effect=AttributeError)
+ self.assertRaises(AttributeError, mock)
+
+ mock = Mock(side_effect=AttributeError('foo'))
+ self.assertRaises(AttributeError, mock)
+
+
+ def test_baseexceptional_side_effect(self):
+ mock = Mock(side_effect=KeyboardInterrupt)
+ self.assertRaises(KeyboardInterrupt, mock)
+
+ mock = Mock(side_effect=KeyboardInterrupt('foo'))
+ self.assertRaises(KeyboardInterrupt, mock)
+
+
+ def test_assert_called_with_message(self):
+ mock = Mock()
+ self.assertRaisesRegex(AssertionError, 'Not called',
+ mock.assert_called_with)
+
+
+ def test__name__(self):
+ mock = Mock()
+ self.assertRaises(AttributeError, lambda: mock.__name__)
+
+ mock.__name__ = 'foo'
+ self.assertEqual(mock.__name__, 'foo')
+
+
+ def test_spec_list_subclass(self):
+ class Sub(list):
+ pass
+ mock = Mock(spec=Sub(['foo']))
+
+ mock.append(3)
+ mock.append.assert_called_with(3)
+ self.assertRaises(AttributeError, getattr, mock, 'foo')
+
+
+ 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_setting_attribute_with_spec_set(self):
+ class X(object):
+ y = 3
+
+ mock = Mock(spec=X)
+ mock.x = 'foo'
+
+ mock = Mock(spec_set=X)
+ def set_attr():
+ mock.x = 'foo'
+
+ mock.y = 'foo'
+ self.assertRaises(AttributeError, set_attr)
+
+
+ def test_copy(self):
+ current = sys.getrecursionlimit()
+ self.addCleanup(sys.setrecursionlimit, current)
+
+ # can't use sys.maxint as this doesn't exist in Python 3
+ sys.setrecursionlimit(int(10e8))
+ # this segfaults without the fix in place
+ copy.copy(Mock())
+
+
+ def test_subclass_with_properties(self):
+ class SubClass(Mock):
+ def _get(self):
+ return 3
+ def _set(self, value):
+ raise NameError('strange error')
+ some_attribute = property(_get, _set)
+
+ s = SubClass(spec_set=SubClass)
+ self.assertEqual(s.some_attribute, 3)
+
+ def test():
+ s.some_attribute = 3
+ self.assertRaises(NameError, test)
+
+ def test():
+ s.foo = 'bar'
+ self.assertRaises(AttributeError, test)
+
+
+ def test_setting_call(self):
+ mock = Mock()
+ def __call__(self, a):
+ return self._mock_call(a)
+
+ type(mock).__call__ = __call__
+ mock('one')
+ mock.assert_called_with('one')
+
+ self.assertRaises(TypeError, mock, 'one', 'two')
+
+
+ def test_dir(self):
+ mock = Mock()
+ attrs = set(dir(mock))
+ type_attrs = set([m for m in dir(Mock) if not m.startswith('_')])
+
+ # all public attributes from the type are included
+ self.assertEqual(set(), type_attrs - attrs)
+
+ # creates these attributes
+ mock.a, mock.b
+ self.assertIn('a', dir(mock))
+ self.assertIn('b', dir(mock))
+
+ # instance attributes
+ mock.c = mock.d = None
+ self.assertIn('c', dir(mock))
+ self.assertIn('d', dir(mock))
+
+ # magic methods
+ mock.__iter__ = lambda s: iter([])
+ self.assertIn('__iter__', dir(mock))
+
+
+ def test_dir_from_spec(self):
+ mock = Mock(spec=unittest.TestCase)
+ testcase_attrs = set(dir(unittest.TestCase))
+ attrs = set(dir(mock))
+
+ # all attributes from the spec are included
+ self.assertEqual(set(), testcase_attrs - attrs)
+
+ # shadow a sys attribute
+ mock.version = 3
+ self.assertEqual(dir(mock).count('version'), 1)
+
+
+ def test_filter_dir(self):
+ patcher = patch.object(mock, 'FILTER_DIR', False)
+ patcher.start()
+ try:
+ attrs = set(dir(Mock()))
+ type_attrs = set(dir(Mock))
+
+ # ALL attributes from the type are included
+ self.assertEqual(set(), type_attrs - attrs)
+ finally:
+ patcher.stop()
+
+
+ def test_configure_mock(self):
+ mock = Mock(foo='bar')
+ self.assertEqual(mock.foo, 'bar')
+
+ mock = MagicMock(foo='bar')
+ self.assertEqual(mock.foo, 'bar')
+
+ kwargs = {'side_effect': KeyError, 'foo.bar.return_value': 33,
+ 'foo': MagicMock()}
+ mock = Mock(**kwargs)
+ self.assertRaises(KeyError, mock)
+ self.assertEqual(mock.foo.bar(), 33)
+ self.assertIsInstance(mock.foo, MagicMock)
+
+ mock = Mock()
+ mock.configure_mock(**kwargs)
+ self.assertRaises(KeyError, mock)
+ self.assertEqual(mock.foo.bar(), 33)
+ self.assertIsInstance(mock.foo, MagicMock)
+
+
+ def assertRaisesWithMsg(self, exception, message, func, *args, **kwargs):
+ # needed because assertRaisesRegex doesn't work easily with newlines
+ try:
+ func(*args, **kwargs)
+ except:
+ instance = sys.exc_info()[1]
+ self.assertIsInstance(instance, exception)
+ else:
+ self.fail('Exception %r not raised' % (exception,))
+
+ msg = str(instance)
+ self.assertEqual(msg, message)
+
+
+ def test_assert_called_with_failure_message(self):
+ mock = NonCallableMock()
+
+ expected = "mock(1, '2', 3, bar='foo')"
+ message = 'Expected call: %s\nNot called'
+ self.assertRaisesWithMsg(
+ AssertionError, message % (expected,),
+ mock.assert_called_with, 1, '2', 3, bar='foo'
+ )
+
+ mock.foo(1, '2', 3, foo='foo')
+
+
+ asserters = [
+ mock.foo.assert_called_with, mock.foo.assert_called_once_with
+ ]
+ for meth in asserters:
+ actual = "foo(1, '2', 3, foo='foo')"
+ expected = "foo(1, '2', 3, bar='foo')"
+ message = 'Expected call: %s\nActual call: %s'
+ self.assertRaisesWithMsg(
+ AssertionError, message % (expected, actual),
+ meth, 1, '2', 3, bar='foo'
+ )
+
+ # just kwargs
+ for meth in asserters:
+ actual = "foo(1, '2', 3, foo='foo')"
+ expected = "foo(bar='foo')"
+ message = 'Expected call: %s\nActual call: %s'
+ self.assertRaisesWithMsg(
+ AssertionError, message % (expected, actual),
+ meth, bar='foo'
+ )
+
+ # just args
+ for meth in asserters:
+ actual = "foo(1, '2', 3, foo='foo')"
+ expected = "foo(1, 2, 3)"
+ message = 'Expected call: %s\nActual call: %s'
+ self.assertRaisesWithMsg(
+ AssertionError, message % (expected, actual),
+ meth, 1, 2, 3
+ )
+
+ # empty
+ for meth in asserters:
+ actual = "foo(1, '2', 3, foo='foo')"
+ expected = "foo()"
+ message = 'Expected call: %s\nActual call: %s'
+ self.assertRaisesWithMsg(
+ AssertionError, message % (expected, actual), meth
+ )
+
+
+ def test_mock_calls(self):
+ mock = MagicMock()
+
+ # need to do this because MagicMock.mock_calls used to just return
+ # a MagicMock which also returned a MagicMock when __eq__ was called
+ self.assertIs(mock.mock_calls == [], True)
+
+ mock = MagicMock()
+ mock()
+ expected = [('', (), {})]
+ self.assertEqual(mock.mock_calls, expected)
+
+ mock.foo()
+ expected.append(call.foo())
+ self.assertEqual(mock.mock_calls, expected)
+ # intermediate mock_calls work too
+ self.assertEqual(mock.foo.mock_calls, [('', (), {})])
+
+ mock = MagicMock()
+ mock().foo(1, 2, 3, a=4, b=5)
+ expected = [
+ ('', (), {}), ('().foo', (1, 2, 3), dict(a=4, b=5))
+ ]
+ self.assertEqual(mock.mock_calls, expected)
+ self.assertEqual(mock.return_value.foo.mock_calls,
+ [('', (1, 2, 3), dict(a=4, b=5))])
+ self.assertEqual(mock.return_value.mock_calls,
+ [('foo', (1, 2, 3), dict(a=4, b=5))])
+
+ mock = MagicMock()
+ mock().foo.bar().baz()
+ expected = [
+ ('', (), {}), ('().foo.bar', (), {}),
+ ('().foo.bar().baz', (), {})
+ ]
+ self.assertEqual(mock.mock_calls, expected)
+ self.assertEqual(mock().mock_calls,
+ call.foo.bar().baz().call_list())
+
+ for kwargs in dict(), dict(name='bar'):
+ mock = MagicMock(**kwargs)
+ int(mock.foo)
+ expected = [('foo.__int__', (), {})]
+ self.assertEqual(mock.mock_calls, expected)
+
+ mock = MagicMock(**kwargs)
+ mock.a()()
+ expected = [('a', (), {}), ('a()', (), {})]
+ self.assertEqual(mock.mock_calls, expected)
+ self.assertEqual(mock.a().mock_calls, [call()])
+
+ mock = MagicMock(**kwargs)
+ mock(1)(2)(3)
+ self.assertEqual(mock.mock_calls, call(1)(2)(3).call_list())
+ self.assertEqual(mock().mock_calls, call(2)(3).call_list())
+ self.assertEqual(mock()().mock_calls, call(3).call_list())
+
+ mock = MagicMock(**kwargs)
+ mock(1)(2)(3).a.b.c(4)
+ self.assertEqual(mock.mock_calls,
+ call(1)(2)(3).a.b.c(4).call_list())
+ self.assertEqual(mock().mock_calls,
+ call(2)(3).a.b.c(4).call_list())
+ self.assertEqual(mock()().mock_calls,
+ call(3).a.b.c(4).call_list())
+
+ mock = MagicMock(**kwargs)
+ int(mock().foo.bar().baz())
+ last_call = ('().foo.bar().baz().__int__', (), {})
+ self.assertEqual(mock.mock_calls[-1], last_call)
+ self.assertEqual(mock().mock_calls,
+ call.foo.bar().baz().__int__().call_list())
+ self.assertEqual(mock().foo.bar().mock_calls,
+ call.baz().__int__().call_list())
+ self.assertEqual(mock().foo.bar().baz.mock_calls,
+ call().__int__().call_list())
+
+
+ def test_subclassing(self):
+ class Subclass(Mock):
+ pass
+
+ mock = Subclass()
+ self.assertIsInstance(mock.foo, Subclass)
+ self.assertIsInstance(mock(), Subclass)
+
+ class Subclass(Mock):
+ def _get_child_mock(self, **kwargs):
+ return Mock(**kwargs)
+
+ mock = Subclass()
+ self.assertNotIsInstance(mock.foo, Subclass)
+ self.assertNotIsInstance(mock(), Subclass)
+
+
+ def test_arg_lists(self):
+ mocks = [
+ Mock(),
+ MagicMock(),
+ NonCallableMock(),
+ NonCallableMagicMock()
+ ]
+
+ def assert_attrs(mock):
+ names = 'call_args_list', 'method_calls', 'mock_calls'
+ for name in names:
+ attr = getattr(mock, name)
+ self.assertIsInstance(attr, _CallList)
+ self.assertIsInstance(attr, list)
+ self.assertEqual(attr, [])
+
+ for mock in mocks:
+ assert_attrs(mock)
+
+ if callable(mock):
+ mock()
+ mock(1, 2)
+ mock(a=3)
+
+ mock.reset_mock()
+ assert_attrs(mock)
+
+ mock.foo()
+ mock.foo.bar(1, a=3)
+ mock.foo(1).bar().baz(3)
+
+ mock.reset_mock()
+ assert_attrs(mock)
+
+
+ def test_call_args_two_tuple(self):
+ mock = Mock()
+ mock(1, a=3)
+ mock(2, b=4)
+
+ self.assertEqual(len(mock.call_args), 2)
+ args, kwargs = mock.call_args
+ self.assertEqual(args, (2,))
+ self.assertEqual(kwargs, dict(b=4))
+
+ expected_list = [((1,), dict(a=3)), ((2,), dict(b=4))]
+ for expected, call_args in zip(expected_list, mock.call_args_list):
+ self.assertEqual(len(call_args), 2)
+ self.assertEqual(expected[0], call_args[0])
+ self.assertEqual(expected[1], call_args[1])
+
+
+ def test_side_effect_iterator(self):
+ mock = Mock(side_effect=iter([1, 2, 3]))
+ self.assertEqual([mock(), mock(), mock()], [1, 2, 3])
+ self.assertRaises(StopIteration, mock)
+
+ mock = MagicMock(side_effect=['a', 'b', 'c'])
+ self.assertEqual([mock(), mock(), mock()], ['a', 'b', 'c'])
+ self.assertRaises(StopIteration, mock)
+
+ mock = Mock(side_effect='ghi')
+ self.assertEqual([mock(), mock(), mock()], ['g', 'h', 'i'])
+ self.assertRaises(StopIteration, mock)
+
+ class Foo(object):
+ pass
+ mock = MagicMock(side_effect=Foo)
+ self.assertIsInstance(mock(), Foo)
+
+ mock = Mock(side_effect=Iter())
+ self.assertEqual([mock(), mock(), mock(), mock()],
+ ['this', 'is', 'an', 'iter'])
+ self.assertRaises(StopIteration, mock)
+
+
+ def test_side_effect_setting_iterator(self):
+ mock = Mock()
+ mock.side_effect = iter([1, 2, 3])
+ self.assertEqual([mock(), mock(), mock()], [1, 2, 3])
+ self.assertRaises(StopIteration, mock)
+ side_effect = mock.side_effect
+ self.assertIsInstance(side_effect, type(iter([])))
+
+ mock.side_effect = ['a', 'b', 'c']
+ self.assertEqual([mock(), mock(), mock()], ['a', 'b', 'c'])
+ self.assertRaises(StopIteration, mock)
+ side_effect = mock.side_effect
+ self.assertIsInstance(side_effect, type(iter([])))
+
+ this_iter = Iter()
+ mock.side_effect = this_iter
+ self.assertEqual([mock(), mock(), mock(), mock()],
+ ['this', 'is', 'an', 'iter'])
+ self.assertRaises(StopIteration, mock)
+ self.assertIs(mock.side_effect, this_iter)
+
+
+ def test_assert_has_calls_any_order(self):
+ mock = Mock()
+ mock(1, 2)
+ mock(a=3)
+ mock(3, 4)
+ mock(b=6)
+ mock(b=6)
+
+ kalls = [
+ call(1, 2), ({'a': 3},),
+ ((3, 4),), ((), {'a': 3}),
+ ('', (1, 2)), ('', {'a': 3}),
+ ('', (1, 2), {}), ('', (), {'a': 3})
+ ]
+ for kall in kalls:
+ mock.assert_has_calls([kall], any_order=True)
+
+ for kall in call(1, '2'), call(b=3), call(), 3, None, 'foo':
+ self.assertRaises(
+ AssertionError, mock.assert_has_calls,
+ [kall], any_order=True
+ )
+
+ kall_lists = [
+ [call(1, 2), call(b=6)],
+ [call(3, 4), call(1, 2)],
+ [call(b=6), call(b=6)],
+ ]
+
+ for kall_list in kall_lists:
+ mock.assert_has_calls(kall_list, any_order=True)
+
+ kall_lists = [
+ [call(b=6), call(b=6), call(b=6)],
+ [call(1, 2), call(1, 2)],
+ [call(3, 4), call(1, 2), call(5, 7)],
+ [call(b=6), call(3, 4), call(b=6), call(1, 2), call(b=6)],
+ ]
+ for kall_list in kall_lists:
+ self.assertRaises(
+ AssertionError, mock.assert_has_calls,
+ kall_list, any_order=True
+ )
+
+ def test_assert_has_calls(self):
+ kalls1 = [
+ call(1, 2), ({'a': 3},),
+ ((3, 4),), call(b=6),
+ ('', (1,), {'b': 6}),
+ ]
+ kalls2 = [call.foo(), call.bar(1)]
+ kalls2.extend(call.spam().baz(a=3).call_list())
+ kalls2.extend(call.bam(set(), foo={}).fish([1]).call_list())
+
+ mocks = []
+ for mock in Mock(), MagicMock():
+ mock(1, 2)
+ mock(a=3)
+ mock(3, 4)
+ mock(b=6)
+ mock(1, b=6)
+ mocks.append((mock, kalls1))
+
+ mock = Mock()
+ mock.foo()
+ mock.bar(1)
+ mock.spam().baz(a=3)
+ mock.bam(set(), foo={}).fish([1])
+ mocks.append((mock, kalls2))
+
+ for mock, kalls in mocks:
+ for i in range(len(kalls)):
+ for step in 1, 2, 3:
+ these = kalls[i:i+step]
+ mock.assert_has_calls(these)
+
+ if len(these) > 1:
+ self.assertRaises(
+ AssertionError,
+ mock.assert_has_calls,
+ list(reversed(these))
+ )
+
+
+ def test_assert_any_call(self):
+ mock = Mock()
+ mock(1, 2)
+ mock(a=3)
+ mock(1, b=6)
+
+ mock.assert_any_call(1, 2)
+ mock.assert_any_call(a=3)
+ mock.assert_any_call(1, b=6)
+
+ self.assertRaises(
+ AssertionError,
+ mock.assert_any_call
+ )
+ self.assertRaises(
+ AssertionError,
+ mock.assert_any_call,
+ 1, 3
+ )
+ self.assertRaises(
+ AssertionError,
+ mock.assert_any_call,
+ a=4
+ )
+
+
+ def test_mock_calls_create_autospec(self):
+ def f(a, b):
+ pass
+ obj = Iter()
+ obj.f = f
+
+ funcs = [
+ create_autospec(f),
+ create_autospec(obj).f
+ ]
+ for func in funcs:
+ func(1, 2)
+ func(3, 4)
+
+ self.assertEqual(
+ func.mock_calls, [call(1, 2), call(3, 4)]
+ )
+
+
+ def test_mock_add_spec(self):
+ class _One(object):
+ one = 1
+ class _Two(object):
+ two = 2
+ class Anything(object):
+ one = two = three = 'four'
+
+ klasses = [
+ Mock, MagicMock, NonCallableMock, NonCallableMagicMock
+ ]
+ for Klass in list(klasses):
+ klasses.append(lambda K=Klass: K(spec=Anything))
+ klasses.append(lambda K=Klass: K(spec_set=Anything))
+
+ for Klass in klasses:
+ for kwargs in dict(), dict(spec_set=True):
+ mock = Klass()
+ #no error
+ mock.one, mock.two, mock.three
+
+ for One, Two in [(_One, _Two), (['one'], ['two'])]:
+ for kwargs in dict(), dict(spec_set=True):
+ mock.mock_add_spec(One, **kwargs)
+
+ mock.one
+ self.assertRaises(
+ AttributeError, getattr, mock, 'two'
+ )
+ self.assertRaises(
+ AttributeError, getattr, mock, 'three'
+ )
+ if 'spec_set' in kwargs:
+ self.assertRaises(
+ AttributeError, setattr, mock, 'three', None
+ )
+
+ mock.mock_add_spec(Two, **kwargs)
+ self.assertRaises(
+ AttributeError, getattr, mock, 'one'
+ )
+ mock.two
+ self.assertRaises(
+ AttributeError, getattr, mock, 'three'
+ )
+ if 'spec_set' in kwargs:
+ self.assertRaises(
+ AttributeError, setattr, mock, 'three', None
+ )
+ # note that creating a mock, setting an instance attribute, and
+ # *then* setting a spec doesn't work. Not the intended use case
+
+
+ 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_adding_child_mock(self):
+ for Klass in NonCallableMock, Mock, MagicMock, NonCallableMagicMock:
+ mock = Klass()
+
+ mock.foo = Mock()
+ mock.foo()
+
+ self.assertEqual(mock.method_calls, [call.foo()])
+ self.assertEqual(mock.mock_calls, [call.foo()])
+
+ mock = Klass()
+ mock.bar = Mock(name='name')
+ mock.bar()
+ self.assertEqual(mock.method_calls, [])
+ self.assertEqual(mock.mock_calls, [])
+
+ # mock with an existing _new_parent but no name
+ mock = Klass()
+ mock.baz = MagicMock()()
+ mock.baz()
+ self.assertEqual(mock.method_calls, [])
+ self.assertEqual(mock.mock_calls, [])
+
+
+ def test_adding_return_value_mock(self):
+ for Klass in Mock, MagicMock:
+ mock = Klass()
+ mock.return_value = MagicMock()
+
+ mock()()
+ self.assertEqual(mock.mock_calls, [call(), call()()])
+
+
+ def test_manager_mock(self):
+ class Foo(object):
+ one = 'one'
+ two = 'two'
+ manager = Mock()
+ p1 = patch.object(Foo, 'one')
+ p2 = patch.object(Foo, 'two')
+
+ mock_one = p1.start()
+ self.addCleanup(p1.stop)
+ mock_two = p2.start()
+ self.addCleanup(p2.stop)
+
+ manager.attach_mock(mock_one, 'one')
+ manager.attach_mock(mock_two, 'two')
+
+ Foo.two()
+ Foo.one()
+
+ self.assertEqual(manager.mock_calls, [call.two(), call.one()])
+
+
+ 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_attribute_deletion(self):
+ # this behaviour isn't *useful*, but at least it's now tested...
+ for Klass in Mock, MagicMock, NonCallableMagicMock, NonCallableMock:
+ m = Klass()
+ original = m.foo
+ m.foo = 3
+ del m.foo
+ self.assertEqual(m.foo, original)
+
+ new = m.foo = Mock()
+ del m.foo
+ self.assertEqual(m.foo, new)
+
+
+ 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(self):
+ classes = Mock, MagicMock, NonCallableMagicMock, NonCallableMock
+ for Klass in classes:
+ for Klass2 in classes:
+ m = Klass()
+
+ m2 = Klass2(name='foo')
+ m.attach_mock(m2, 'bar')
+
+ self.assertIs(m.bar, m2)
+ self.assertIn("name='mock.bar'", repr(m2))
+
+ m.bar.baz(1)
+ self.assertEqual(m.mock_calls, [call.bar.baz(1)])
+ self.assertEqual(m.method_calls, [call.bar.baz(1)])
+
+
+ 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_attribute_deletion(self):
+ for mock in Mock(), MagicMock():
+ self.assertTrue(hasattr(mock, 'm'))
+
+ del mock.m
+ self.assertFalse(hasattr(mock, 'm'))
+
+ del mock.f
+ self.assertFalse(hasattr(mock, 'f'))
+ self.assertRaises(AttributeError, getattr, mock, 'f')
+
+
+ def test_class_assignable(self):
+ for mock in Mock(), MagicMock():
+ self.assertNotIsInstance(mock, int)
+
+ mock.__class__ = int
+ self.assertIsInstance(mock, int)
+ mock.foo
+
+
+
+if __name__ == '__main__':
+ unittest.main()