def METHOD_NAME(self):
    phase1 = Phase(2, 0.3)
    phase2 = -phase1
    sum = phase1 + phase2
    assert_equal(sum.int, u.Quantity(0))
    assert_equal(sum.frac, u.Quantity(0))
    phase01 = -Phase(0, 0)
    assert_equal(phase01.int, u.Quantity(0))
    assert_equal(phase01.frac, u.Quantity(0))