Mini Mock

gistfile1.py

class MiniMock(object):
    """
    A callable object that will always return a value for any
    attribute/index/slice/call accessed. The value returned is a new
    MiniMock instance allowing for successful chained access.
    """

    def __getitem__(self, value):
        """
        Main entry point for each type of access. Stores the value
        returned so that the same object is always given for the same
        value.
        """
        return self.__dict__.setdefault(repr(value), MiniMock())

    def __getattr__(self, name):
        return self[name]

    def __call__(self, *args, **kwargs):
        return self[args, kwargs]

    def __iter__(self):
        return iter([])

    def __len__(self):
        return 0


if __name__ == "__main__":
    mm = MiniMock()
    assert mm.a == mm.a
    assert mm.a != mm.b
    assert mm[0] == mm[0]
    assert mm[0] != mm[1]
    assert mm[0:1] == mm[0:1]
    assert mm[0:1] != mm[0:1:1]
    assert mm["foo"] == mm["foo"]
    assert mm["foo"] != mm["bar"]
    assert mm() == mm()
    assert mm("baz") != mm()
    assert len(mm) == len([x for x in mm])