python unittest理解

一、运行流程

 

二、使用方法：

1、定义一个继承unittest.TestCase的类，类中已test_开头方法就是执行时的测试用例

###########################
#name:test_unittest.py
#!/usr/bin/env python  
# _*_ coding:utf-8 _*_

def add(a, b):
    return a+b


def minus(a, b):
    return a-b


def multi(a, b):
    return a*b


def divide(a, b):
    return a/b

##########################
#name:test_case.py
#!/usr/bin/env python  
# _*_ coding:utf-8 _*_
import test_unittest
import unittest


class MyTest(unittest.TestCase):

    def test_add(self):
        self.assertEqual(5,test_unittest.add(2,3))

    def test_minus(self):
        self.assertEqual(2,test_unittest.minus(5,3))

    def test_multil(self):
        self.assertEqual(6,test_unittest.multi(2,3))

    def test_divide(self):
        self.assertEqual(2,test_unittest.divide(6,2))


if __name__ == '__main__':
    unittest.main(verbosity=2)

2、上述直接执行，可以将多个测试方法，加入到一个TestSuile（测试套件）中，执行一个或多个测试套件

############################################
#name:test_unittest.py
#!/usr/bin/env python  
# _*_ coding:utf-8 _*_

def add(a, b):
    return a+b


def minus(a, b):
    return a-b


def multi(a, b):
    return a*b


def divide(a, b):
    return a/b
###########################################
#name:test_case.py
#!/usr/bin/env python  
# _*_ coding:utf-8 _*_
import test_unittest
import unittest


class MyTest(unittest.TestCase):

    def test_add(self):
        self.assertEqual(5,test_unittest.add(2,3))

    def test_minus(self):
        self.assertEqual(2,test_unittest.minus(5,3))


class MyTest2(unittest.TestCase):

    def test_multil(self):
        self.assertEqual(6,test_unittest.multi(2,3))

    def test_divide(self):
        self.assertEqual(2,test_unittest.divide(6,2))


if __name__ == '__main__':
    unittest.main(verbosity=2)

#############################################
#name:test_suite.py
#!/usr/bin/env python  
# _*_ coding:utf-8 _*_
import test_unittest
from test_case import *
import unittest
if __name__ == '__main__':

    suite = unittest.TestSuite()
    suite.addTests(unittest.TestLoader().loadTestsFromNames(['test_case.MyTest','test_case.MyTest2']))
    runner = unittest.TextTestRunner(verbosity=2)
    runner.run(suite)

3、将结果输出到文件

if __name__ == '__main__':

    suite = unittest.TestSuite()
    suite.addTests(unittest.TestLoader().loadTestsFromNames(['test_case.MyTest','test_case.MyTest2']))
    with open('result1.txt','a') as f:
        runner = unittest.TextTestRunner(stream=f,verbosity=2)
        runner.run(suite)

4、setUp()与tearDown()

setUp() 和 tearDown 分别会在每条用例执行前后执行一次，用于环境的准备和复原

setUpClass() 和 tearDownClass()  分别会在每个unittest.TestCase 类执行前后执行一次

class MyTest(unittest.TestCase):

    def setUp(self):
        print 'setUp is running!'

    def tearDown(self):
        print 'tearDown is running!'

    def test_add(self):
        self.assertEqual(5,test_unittest.add(2,3))

    def test_minus(self):
        self.assertEqual(2,test_unittest.minus(5,3))


class MyTest2(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        print 'setUpClass is running!'

    @classmethod
    def tearDownClass(cls):
        print 'tearDownClass is running!'

    def test_multil(self):
        self.assertEqual(6,test_unittest.multi(2,3))

    def test_divide(self):
        self.assertEqual(2,test_unittest.divide(6,2))

 

5、跳过一条用例

skip装饰器一共有三个 unittest.skip(reason)、unittest.skipIf(condition, reason)、unittest.skipUnless(condition, reason)，skip无条件跳过，skipIf当condition为True时跳过，skipUnless当condition为False时跳过。

6、使用HTMLTestRunner

　　6.1 下载HTMLTestRunner到当前文件   https://github.com/GoverSky/HTMLTestRunner_cn

　　6.1 修改代码，更改runner

#!/usr/bin/env python  
# _*_ coding:utf-8 _*_
import test_unittest
from test_case import *
import unittest
from HTMLTestRunner_cn import HTMLTestRunner
if __name__ == '__main__':

    suite = unittest.TestSuite()
    suite.addTests(unittest.TestLoader().loadTestsFromNames(['test_case.MyTest','test_case.MyTest2']))
    # with open('result1.txt','a') as f:
    #     runner = unittest.TextTestRunner(stream=f,verbosity=2)
    #     runner.run(suite)
    with open('runner.html','a') as f:
        runner = HTMLTestRunner(stream=f, verbosity=2, title='我就是尝试下',description='我不知道这是什么意思')
        runner.run(suite)