python的unittest框架中如何删除测试数据,清理环境,可以通过addCleanup函数
def addCleanup(self, function, *args, **kwargs):"""Add a function, with arguments, to be called when the test is
completed. Functions added are called on a LIFO basis and are
called after tearDown on test failure or success.
Cleanup items are called even if setUp fails (unlike tearDown)."""
self._cleanups.append((function, args, kwargs))
添加针对每个测试用例执行完tearDown()方法之后的清理方法,添加进去的函数按照LIFO的顺序,通过参数添加进去
如果setUp()执行失败,就不会执行tearDown(),自然也不会执行addCleanup()里添加的函数。
使用场景:正常的测试用例,创建资源后,需要清理环境再在用例中删除资源,或者tearDown()后进行资源清理,不方便,如果用了addCleanup()后,直接在用例中写入函数,在tearDown()用例后,会再次调用addCleanup来删除资源,减少代码量以及遗漏删除。
# _*_ encoding:utf-8 _*_from selenium import webdriver
from selenium.webdriver.common.by import By
import unittest
import time
class Baidu(unittest.TestCase):
def abc(self,a):
print(a)
def setUp(self):
self.driver = webdriver.Firefox()
self.driver.implicitly_wait(10)
self.base_url = 'http://www.baidu.com'
print ("This is setUp")
def test_baidu_search(self):
driver = self.driver
driver.get(self.base_url)
driver.find_element_by_id("kw").send_keys("HTMLTestRunner")
driver.find_element_by_id("su").click()
cleanups = ('abcdefg',)
self.addCleanup(self.abc,
cleanups[0])
def tearDown(self):
self.driver.quit()
print ("This is tearDown")
if __name__ == '__main__':
unittest.main()
# testsuit = unittest.TestSuite()
# testsuit.addTest(Baidu("test_baidu_search"))
执行结果如下,可以看到会在用例结束之后,执行addCleanup里的函数,因此可以用来进行,测试环境数据清理工作。
This is setUp
.
----------------------------------------------------------------------
Ran 1 test in 16.072s
OK
This is tearDown
abcdefg
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