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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 this_dir not in sys.path:
# Fix for running tests on the Mac
sys.path.insert(0, this_dir)
if __name__ == '__main__':
sys.modules['testpatch'] = sys.modules['__main__']
if 'testpatch' in sys.modules:
# Fix for running tests under Wing
import tests
import testpatch
tests.testpatch = testpatch
from testcase import TestCase
from testutils import RunTests
from mock import Mock, patch, patch_object, sentinel
# for use in the test
something = sentinel.Something
something_else = sentinel.SomethingElse
class SomeClass(object):
class_attribute = None
def wibble(self):
pass
class PatchTest(TestCase):
def testSinglePatchObject(self):
class Something(object):
attribute = sentinel.Original
@apply
@patch_object(Something, 'attribute', sentinel.Patched)
def test():
self.assertEquals(Something.attribute, sentinel.Patched, "unpatched")
self.assertEquals(Something.attribute, sentinel.Original, "patch not restored")
def testPatchObjectWithNone(self):
class Something(object):
attribute = sentinel.Original
@apply
@patch_object(Something, 'attribute', None)
def test():
self.assertNone(Something.attribute, "unpatched")
self.assertEquals(Something.attribute, sentinel.Original, "patch not restored")
def testMultiplePatchObject(self):
class Something(object):
attribute = sentinel.Original
next_attribute = sentinel.Original2
@apply
@patch_object(Something, 'attribute', sentinel.Patched)
@patch_object(Something, 'next_attribute', sentinel.Patched2)
def test():
self.assertEquals(Something.attribute, sentinel.Patched, "unpatched")
self.assertEquals(Something.next_attribute, sentinel.Patched2, "unpatched")
self.assertEquals(Something.attribute, sentinel.Original, "patch not restored")
self.assertEquals(Something.next_attribute, sentinel.Original2, "patch not restored")
def testObjectLookupIsQuiteLazy(self):
global something
original = something
@patch('tests.testpatch.something', sentinel.Something2)
def test():
pass
try:
something = sentinel.replacement_value
test()
self.assertEquals(something, sentinel.replacement_value)
finally:
something = original
def testPatch(self):
import __main__
__main__.something = sentinel.Something
@apply
@patch('__main__.something', sentinel.Something2)
def test():
self.assertEquals(__main__.something, sentinel.Something2, "unpatched")
self.assertEquals(__main__.something, sentinel.Something, "patch not restored")
import tests.testpatch as PTModule
@patch('tests.testpatch.something', sentinel.Something2)
@patch('tests.testpatch.something_else', sentinel.SomethingElse)
def test():
self.assertEquals(PTModule.something, sentinel.Something2, "unpatched")
self.assertEquals(PTModule.something_else, sentinel.SomethingElse, "unpatched")
self.assertEquals(PTModule.something, sentinel.Something, "patch not restored")
self.assertEquals(PTModule.something_else, sentinel.SomethingElse, "patch not restored")
# Test the patching and restoring works a second time
test()
self.assertEquals(PTModule.something, sentinel.Something, "patch not restored")
self.assertEquals(PTModule.something_else, sentinel.SomethingElse, "patch not restored")
mock = Mock()
mock.return_value = sentinel.Handle
@patch('__builtin__.open', mock)
def test():
self.assertEquals(open('filename', 'r'), sentinel.Handle, "open not patched")
test()
test()
self.assertNotEquals(open, mock, "patch not restored")
def testPatchClassAttribute(self):
import tests.testpatch as PTModule
@patch('tests.testpatch.SomeClass.class_attribute', sentinel.ClassAttribute)
def test():
self.assertEquals(PTModule.SomeClass.class_attribute, sentinel.ClassAttribute, "unpatched")
test()
self.assertNone(PTModule.SomeClass.class_attribute, "patch not restored")
def testPatchObjectWithDefaultMock(self):
class Test(object):
something = sentinel.Original
something2 = sentinel.Original2
@apply
@patch_object(Test, 'something')
def test(mock):
self.assertEquals(mock, Test.something, "Mock not passed into test function")
self.assertTrue(isinstance(mock, Mock),
"patch with two arguments did not create a mock")
@patch_object(Test, 'something')
@patch_object(Test, 'something2')
def test(this1, this2, mock1, mock2):
self.assertEquals(this1, sentinel.this1, "Patched function didn't receive initial argument")
self.assertEquals(this2, sentinel.this2, "Patched function didn't receive second argument")
self.assertEquals(mock1, Test.something2, "Mock not passed into test function")
self.assertEquals(mock2, Test.something, "Second Mock not passed into test function")
self.assertTrue(isinstance(mock2, Mock),
"patch with two arguments did not create a mock")
self.assertTrue(isinstance(mock2, Mock),
"patch with two arguments did not create a mock")
# A hack to test that new mocks are passed the second time
self.assertNotEquals(outerMock1, mock1, "unexpected value for mock1")
self.assertNotEquals(outerMock2, mock2, "unexpected value for mock1")
return mock1, mock2
outerMock1 = None
outerMock2 = None
outerMock1, outerMock2 = test(sentinel.this1, sentinel.this2)
# Test that executing a second time creates new mocks
test(sentinel.this1, sentinel.this2)
def testPatchWithSpec(self):
@patch('tests.testpatch.SomeClass', spec=SomeClass)
def test(MockSomeClass):
self.assertEquals(SomeClass, MockSomeClass)
self.assertTrue(isinstance(SomeClass.wibble, Mock))
self.assertRaises(AttributeError, lambda: SomeClass.not_wibble)
test()
def testPatchObjectWithSpec(self):
@patch_object(SomeClass, 'class_attribute', spec=SomeClass)
def test(MockAttribute):
self.assertEquals(SomeClass.class_attribute, MockAttribute)
self.assertTrue(isinstance(SomeClass.class_attribute.wibble, Mock))
self.assertRaises(AttributeError, lambda: SomeClass.class_attribute.not_wibble)
test()
def testPatchWithSpecAsList(self):
@patch('tests.testpatch.SomeClass', spec=['wibble'])
def test(MockSomeClass):
self.assertEquals(SomeClass, MockSomeClass)
self.assertTrue(isinstance(SomeClass.wibble, Mock))
self.assertRaises(AttributeError, lambda: SomeClass.not_wibble)
test()
def testPatchObjectWithSpecAsList(self):
@patch_object(SomeClass, 'class_attribute', spec=['wibble'])
def test(MockAttribute):
self.assertEquals(SomeClass.class_attribute, MockAttribute)
self.assertTrue(isinstance(SomeClass.class_attribute.wibble, Mock))
self.assertRaises(AttributeError, lambda: SomeClass.class_attribute.not_wibble)
test()
def testNestedPatchWithSpecAsList(self):
# regression test for nested decorators
@patch('__builtin__.open')
@patch('tests.testpatch.SomeClass', spec=['wibble'])
def test(MockSomeClass, MockOpen):
self.assertEquals(SomeClass, MockSomeClass)
self.assertTrue(isinstance(SomeClass.wibble, Mock))
self.assertRaises(AttributeError, lambda: SomeClass.not_wibble)
def testPatchWithSpecAsBoolean(self):
@apply
@patch('tests.testpatch.SomeClass', spec=True)
def test(MockSomeClass):
self.assertEquals(SomeClass, MockSomeClass)
# Should not raise attribute error
MockSomeClass.wibble
self.assertRaises(AttributeError, lambda: MockSomeClass.not_wibble)
def testPatchObjectWithSpecAsBoolean(self):
from tests import testpatch
@apply
@patch_object(testpatch, 'SomeClass', spec=True)
def test(MockSomeClass):
self.assertEquals(SomeClass, MockSomeClass)
# Should not raise attribute error
MockSomeClass.wibble
self.assertRaises(AttributeError, lambda: MockSomeClass.not_wibble)
def testPatchClassActsWithSpecIsInherited(self):
@apply
@patch('tests.testpatch.SomeClass', spec=True)
def test(MockSomeClass):
instance = MockSomeClass()
# Should not raise attribute error
instance.wibble
self.assertRaises(AttributeError, lambda: instance.not_wibble)
def testPatchWithCreateMocksNonExistentAttributes(self):
@patch('__builtin__.frooble', sentinel.Frooble, create=True)
def test():
self.assertEquals(frooble, sentinel.Frooble)
test()
self.assertRaises(NameError, lambda: frooble)
def testPatchObjectWithCreateMocksNonExistentAttributes(self):
@patch_object(SomeClass, 'frooble', sentinel.Frooble, create=True)
def test():
self.assertEquals(SomeClass.frooble, sentinel.Frooble)
test()
self.assertFalse(hasattr(SomeClass, 'frooble'))
def testPatchWontCreateByDefault(self):
try:
@patch('__builtin__.frooble', sentinel.Frooble)
def test():
self.assertEquals(frooble, sentinel.Frooble)
test()
except AttributeError:
pass
else:
self.fail('Patching non existent attributes should fail')
self.assertRaises(NameError, lambda: frooble)
def testPatchObjecWontCreateByDefault(self):
try:
@patch_object(SomeClass, 'frooble', sentinel.Frooble)
def test():
self.assertEquals(SomeClass.frooble, sentinel.Frooble)
test()
except AttributeError:
pass
else:
self.fail('Patching non existent attributes should fail')
self.assertFalse(hasattr(SomeClass, 'frooble'))
def testPathWithStaticMethods(self):
class Foo(object):
@staticmethod
def woot():
return sentinel.Static
@patch_object(Foo, 'woot', staticmethod(lambda: sentinel.Patched))
def anonymous():
self.assertEquals(Foo.woot(), sentinel.Patched)
anonymous()
self.assertEquals(Foo.woot(), sentinel.Static)
def testPatchLocal(self):
foo = sentinel.Foo
@patch_object(sentinel, 'Foo', 'Foo')
def anonymous():
self.assertEqual(sentinel.Foo, 'Foo')
anonymous()
self.assertEqual(sentinel.Foo, foo)
def testPatchSlots(self):
class Foo(object):
__slots__ = ('Foo',)
foo = Foo()
foo.Foo = sentinel.Foo
@patch_object(foo, 'Foo', 'Foo')
def anonymous():
self.assertEqual(foo.Foo, 'Foo')
anonymous()
self.assertEqual(foo.Foo, sentinel.Foo)
if __name__ == '__main__':
RunTests(PatchTest)
|
