【Python】【unittest】unittest測試框架中setup,teardown與setupclass,teardownclass的區別

# -*- coding:utf-8 -*-
import unittest


def runTest(testcaseclass,testcase=[]):
    suite = unittest.TestSuite()
    for case in testcase:
        suite.addTest(testcaseclass(case))
    unittest.TextTestRunner().run(suite)

class test(unittest.TestCase):

    def setUp(self):
        print 'This is the setup msg'

    def tearDown(self):
        print 'This is the teardown msg'
    @classmethod
    def setUpClass(cls):
        print 'this is the setupclass msg'


    @classmethod
    def tearDownClass(cls):
        print 'this is the teardownclass msg'

    def test1(self):
        print 'This is the first testcase'

    def test2(self):
        print 'This is the second testcase'

    def test3(self):
        print 'This is the third testcase'

runTest(test,['test2','test3','test1'])


輸出如下：
C:\Python27\python.exe "E:/Project/A3A 8 4G/13.py"
...

----------------------------------------------------------------------


this is the setupclass msg
This is the setup msg
This is the second testcase

This is the teardown msg

This is the setup msg
This is the third testcase
This is the teardown msg
This is the setup msg
This is the first testcase
This is the teardown msg
this is the teardownclass msg

Ran 3 tests in 0.000s

OK

Process finished with exit code 0

 

總結：

1、setup()和teardown()兩個函數在每條測試用例執行時都會進行重復執行一次，該場景針對那些測試用例間有相互影響的場景，才需要在每執行一條新用例時進行一次初使化，執行完畢后再清空所有配置

2、setupclass(cls)和teardownclass(cls)兩個函數在一個用例集合執行前只會執行一次，然后再所有用例執行完成后再清空所有配置，此種用法主要用在用例之間相互沒有什么影響的場景