unittest 学习 4 - 常用断言

assertEqual(a, b)	a == b
assertNotEqual(a, b)	a != b
assertTrue(x)	bool(x) is True
assertFalse(x)	bool(x) is False
assertIs(a, b)	a is b
assertIsNot(a, b)	a is not b
assertNone(x)	x is None
assertIsNotNone(x)	x is not None
assertIn(a, b)	a in b
assertNotIn(a, b)	a not in b
assertIsInstance(a, b)	ininstance(a, b)
assertNotIsInstance(a, b)	not instance(a, b)

NOTE： 上面所有断言方法都有一个可选参数，即error message, 作为失败的错误信息
没有直接使用关键字assert方便，所以很少用