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# Copyright (C) 2007-2009 Michael Foord
# E-mail: fuzzyman AT voidspace DOT org DOT uk
# http://www.voidspace.org.uk/python/mock/
import os
import sys
this_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
if not this_dir in sys.path:
# Fix for running tests on the Mac
sys.path.insert(0, this_dir)
if 'testmock' in sys.modules:
# Fix for running tests under Wing
import tests
import testmock
tests.testmock = testmock
from testcase import TestCase
from testutils import RunTests
from mock import Mock, sentinel, DEFAULT
class MockTest(TestCase):
def testConstructor(self):
mock = Mock()
self.assertFalse(mock.called, "called not initialised correctly")
self.assertEquals(mock.call_count, 0, "call_count not initialised correctly")
self.assertTrue(isinstance(mock.return_value, Mock), "return_value not initialised correctly")
self.assertEquals(mock.call_args, None, "call_args not initialised correctly")
self.assertEquals(mock.call_args_list, [], "call_args_list not initialised correctly")
self.assertEquals(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.assertNone(mock._parent, "parent not initialised correctly")
self.assertNone(mock._methods, "methods not initialised correctly")
self.assertEquals(mock._children, {}, "children not initialised incorrectly")
def testReturnValueInConstructor(self):
mock = Mock(return_value=None)
self.assertNone(mock.return_value, "return value in constructor not honoured")
def testSideEffect(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.assertEquals([mock(), mock(), mock()], [3, 2, 1],
"side effect not used correctly")
mock = Mock(side_effect=sentinel.SideEffect)
self.assertEquals(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 testReset(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.assertEquals(mock._name, "child", "name incorrectly reset")
self.assertEquals(mock._parent, parent, "parent incorrectly reset")
self.assertEquals(mock._methods, spec, "methods incorrectly reset")
self.assertFalse(mock.called, "called not reset")
self.assertEquals(mock.call_count, 0, "call_count not reset")
self.assertEquals(mock.call_args, None, "call_args not reset")
self.assertEquals(mock.call_args_list, [], "call_args_list not reset")
self.assertEquals(mock.method_calls, [],
"method_calls not initialised correctly: %r != %r" % (mock.method_calls, []))
self.assertEquals(mock.side_effect, sentinel.SideEffect,
"side_effect incorrectly reset")
self.assertEquals(mock.return_value, return_value,
"return_value incorrectly reset")
self.assertFalse(return_value.called, "return value mock not reset")
self.assertEquals(mock._children, {'something': something},
"children reset incorrectly")
self.assertEquals(mock.something, something,
"children incorrectly cleared")
self.assertFalse(mock.something.called, "child not reset")
def testCall(self):
mock = Mock()
self.assertTrue(isinstance(mock.return_value, Mock), "Default return_value should be a Mock")
result = mock()
self.assertEquals(mock(), result, "different result from consecutive calls")
mock.reset_mock()
ret_val = mock(sentinel.Arg)
self.assertTrue(mock.called, "called not set")
self.assertEquals(mock.call_count, 1, "call_count incoreect")
self.assertEquals(mock.call_args, ((sentinel.Arg,), {}), "call_args not set")
self.assertEquals(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.assertEquals(ret_val, sentinel.ReturnValue, "incorrect return value")
self.assertEquals(mock.call_count, 2, "call_count incorrect")
self.assertEquals(mock.call_args, ((sentinel.Arg,), {'key': sentinel.KeyArg}), "call_args not set")
self.assertEquals(mock.call_args_list, [((sentinel.Arg,), {}), ((sentinel.Arg,), {'key': sentinel.KeyArg})], "call_args_list not set")
def testAssertCalledWith(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 testAttributeAccessReturnsMocks(self):
mock = Mock()
something = mock.something
self.assertTrue(isinstance(something, Mock), "attribute isn't a mock")
self.assertEquals(mock.something, something, "different attributes returned for same name")
# Usage example
mock = Mock()
mock.something.return_value = 3
self.assertEquals(mock.something(), 3, "method returned wrong value")
self.assertTrue(mock.something.called, "method didn't record being called")
def testAttributesHaveNameAndParentSet(self):
mock = Mock()
something = mock.something
self.assertEquals(something._name, "something", "attribute name not set correctly")
self.assertEquals(something._parent, mock, "attribute parent not set correctly")
def testMethodCallsRecorded(self):
mock = Mock()
mock.something(3, fish=None)
mock.something_else.something(6, cake=sentinel.Cake)
self.assertEquals(mock.something_else.method_calls,
[("something", (6,), {'cake': sentinel.Cake})],
"method calls not recorded correctly")
self.assertEquals(mock.method_calls,
[("something", (3,), {'fish': None}),
("something_else.something", (6,), {'cake': sentinel.Cake})],
"method calls not recorded correctly")
def testOnlyAllowedMethodsExist(self):
spec = ["something"]
mock = Mock(spec=spec)
# this should be allowed
mock.something
self.assertRaisesWithMessage(AttributeError,
"Mock object has no attribute 'something_else'",
lambda: mock.something_else)
def testFromSpec(self):
class Something(object):
x = 3
__something__ = None
def y(self):
pass
def testAttributes(mock):
# should work
mock.x
mock.y
self.assertRaisesWithMessage(AttributeError,
"Mock object has no attribute 'z'",
lambda: mock.z)
self.assertRaisesWithMessage(AttributeError,
"Mock object has no attribute '__something__'",
lambda: mock.__something__)
testAttributes(Mock(spec=Something))
testAttributes(Mock(spec=Something()))
def testWrapsCalls(self):
real = Mock()
mock = Mock(wraps=real)
self.assertEquals(mock(), real())
real.reset_mock()
mock(1, 2, fish=3)
real.assert_called_with(1, 2, fish=3)
def testWrapsCallWithNonDefaultReturnValue(self):
real = Mock()
mock = Mock(wraps=real)
mock.return_value = 3
self.assertEqual(mock(), 3)
self.assertFalse(real.called)
def testWrapsAttributes(self):
class Real(object):
attribute = Mock()
real = Real()
mock = Mock(wraps=real)
self.assertEquals(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.assertEquals(result, Real.attribute.frog())
def testExceptionalSideEffect(self):
mock = Mock(side_effect=AttributeError)
self.assertRaises(AttributeError, mock)
mock = Mock(side_effect=AttributeError('foo'))
self.assertRaises(AttributeError, mock)
if __name__ == '__main__':
RunTests(MockTest)
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