def test_simple_add_using_mock(self, mocker):
"""The class SimeWithDependency gets its dependency
as a mock object. This is good when we don't really
care about the implementation of the dependency class
but just need to replace the normal implementation.
"""
dep_mock = mocker.MagicMock()
s = SimpleWithDependency(dep_mock)
s.add(1, 1)
assert dep_mock.initialize.call_count == 1
def test_simple_add_using_stub(self):
"""The class SimpleWithDependency gets its dependency
as a stub we implement ourselves in the test suite.
This is good when we need to have total controll of
how the dependency acts and when the implementation
will not involve too much code.
"""
dep_stub = DependencyStub()
s = SimpleWithDependency(dep_stub)
assert s.add(1, 1) == 2