def test_returns_mismatch_when_zero_calls(self):
mock = Mock()
matcher = MockCalledOnce()
result = matcher.match(mock)
self.assertMismatch(result,
"Expected to be called once. Called 0 times.")
def test_returns_none_when_matches(self):
mock = Mock()
mock(1, 2, frob=5, nob=6)
matcher = MockCalledOnce()
result = matcher.match(mock)
self.assertIsNone(result)
def test_returns_mismatch_when_multiple_calls(self):
mock = Mock()
mock(1, 2, frob=5, nob=6)
mock(1, 2, frob=5, nob=6)
matcher = MockCalledOnce()
result = matcher.match(mock)
self.assertMismatch(result,
"Expected to be called once. Called 2 times.")
