import implementation


def test_implementation_survived_mutant():
    """
    Test to check if the implementation function survives mutation.
    This test is expected to pass.
    """
    assert implementation.implementation_function() is None


def test_implementation_killed_mutant():
    """
    Test to check if the implementation function kills a mutant.
    This test is expected to fail.
    """
    assert implementation.implementation_function() is not None