python unittest 快速入门

import unittest

def add(x, y):
    return x + y

class TestLearning(unittest.TestCase):

    def setUp(self):
        a = 0
        a += 1
        print('a:' + str(a))  

    def test_demo(self):
        # a=1/0
        self.assertEqual('foo'.upper(), 'FOO')

    def test_next(self):
        self.assertTrue(1 == 1)

在命令行运行的结果：

(venvtest) rabbit:testframe rabbit$ python -m unittest discover -v qiuzhouxin
test_demo (tests.TestLearning) ... a:1
ok
test_next (tests.TestLearning) ... a:1
ok

----------------------------------------------------------------------
Ran 2 tests in 0.000s

解析：每次运行一个testcase都会先运行setUp()

若运行testcase过程中有异常，为测试失败（errors=xx)

若assert断言失败，为测试失败（failures=xx）

tearDown()类似setUp，在每个test方法结束后调用，无论测试结果是fail还是error都会调用

assert断言方法：

方法	检查一下	新的
`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`	3.1
`assertIsNot(a, b)`	`a is not b`	3.1
`assertIsNone(x)`	`x is None`	3.1
`assertIsNotNone(x)`	`x is not None`	3.1
`assertIn(a, b)`	`a in b`	3.1
`assertNotIn(a, b)`	`a not in b`	3.1
`assertIsInstance(a, b)`	`isinstance(a, b)`	3.2
`assertNotIsInstance(a, b)`	`not isinstance(a, b)`	3.2