python-mock

I have a function ( foo ) which calls another function ( bar ). If invoking bar() raises an HttpError , I want to handle it specially if the status code is 404, otherwise re-raise. I am trying to write some unit tests around this foo function, mocking out the call to bar() . Unfortunately, I am unable to get the mocked call to bar() to raise an Exception which is caught by my except block. Here is my code which illustrates my problem: import unittest import mock from apiclient.errors import HttpError class FooTests(unittest.TestCase): @mock.patch('my_tests.bar') def test_foo

I need to patch current datetime in tests. I am using this solution: def _utcnow(): return datetime.datetime.utcnow() def utcnow(): """A proxy which can be patched in tests. """ # another level of indirection, because some modules import utcnow return _utcnow() Then in my tests I do something like: with mock.patch('***.utils._utcnow', return_value=***): ... But today an idea came to me, that I could make the implementation simpler by patching __call__ of function utcnow instead of having an additional _utcnow . This does not work for me: from ***.utils import utcnow with mock.patch.object

I'm having a fairly difficult time using mock in Python: def method_under_test(): r = requests.post("http://localhost/post") print r.ok # prints "<MagicMock name='post().ok' id='11111111'>" if r.ok: return StartResult() else: raise Exception() class MethodUnderTestTest(TestCase): def test_method_under_test(self): with patch('requests.post') as patched_post: patched_post.return_value.ok = True result = method_under_test() self.assertEqual(type(result), StartResult, "Failed to return a StartResult.") The test actually returns the right value, but r.ok is a Mock object, not True . How do you mock

I am using pythons mock.patch and would like to change the return value for each call. Here is the caveat: the function being patched has no inputs, so I can not change the return value based on the input. Here is my code for reference. def get_boolean_response(): response = io.prompt('y/n').lower() while response not in ('y', 'n', 'yes', 'no'): io.echo('Not a valid input. Try again']) response = io.prompt('y/n').lower() return response in ('y', 'yes') My Test code: @mock.patch('io') def test_get_boolean_response(self, mock_io): #setup mock_io.prompt.return_value = ['x','y'] result =

I want to understand how to @patch a function from an imported module. This is where I am so far. app/mocking.py: from app.my_module import get_user_name def test_method(): return get_user_name() if __name__ == "__main__": print "Starting Program..." test_method() app/my_module/__init__.py: def get_user_name(): return "Unmocked User" test/mock-test.py: import unittest from app.mocking import test_method def mock_get_user(): return "Mocked This Silly" @patch('app.my_module.get_user_name') class MockingTestTestCase(unittest.TestCase): def test_mock_stubs(self, mock_method): mock_method.return

I have a class that I'm testing which has as a dependency another class (an instance of which gets passed to the CUT's init method). I want to mock out this class using the Python Mock library. What I have is something like: mockobj = Mock(spec=MyDependencyClass) mockobj.methodfromdepclass.return_value = "the value I want the mock to return" assertTrue(mockobj.methodfromdepclass(42), "the value I want the mock to return") cutobj = ClassUnderTest(mockobj) Which is fine, but "methodfromdepclass" is a parameterized method, and as such I want to create a single mock object where depending on what