test_operator.py 文件源码

def test_neg(self):
        self.assertRaises(TypeError, operator.neg)
        self.assertRaises(TypeError, operator.neg, None)
        self.assertTrue(operator.neg(5) == -5)
        self.assertTrue(operator.neg(-5) == 5)
        self.assertTrue(operator.neg(0) == 0)
        self.assertTrue(operator.neg(-0) == 0)