在执行测试用例时，有时候有些用例是不需要执行的，那我们怎么办呢？难道删除这些用例？那下次执行时如果又需要执行这些用例时，又把它补回来？这样操作就太麻烦了。

unittest提供了一些跳过指定用例的方法

• @unittest.skip(reason)：强制跳转。reason是跳转原因
• @unittest.skipIf(condition, reason)：condition为True的时候跳转
• @unittest.skipUnless(condition, reason)：condition为False的时候跳转
• @unittest.expectedFailure：如果test失败了，这个test不计入失败的case数目

  # coding = utf-8
  
  import unittest
  
  import warnings
  
  from selenium import webdriver
  
  from time import sleep
  
  # 驱动文件路径
  
  driverfile_path = r'D:\coship\Test_Framework\drivers\IEDriverServer.exe'
  
  class CmsLoginTest(unittest.TestCase):
  
      def setUp(self):
  
          # 这行代码的作用是忽略一些告警打印
  
          warnings.simplefilter("ignore", ResourceWarning)
  
          self.driver = webdriver.Ie(executable_path=driverfile_path)
  
          self.driver.get("http://172.21.13.83:28080/")
  
      def tearDown(self):
  
          self.driver.quit()
  
      @unittest.skip("用户名密码都为空用例不执行")
  
      def test_login1(self):
  
          '''用户名、密码为空'''
  
          self.driver.find_element_by_css_selector("#imageField").click()
  
          error_message1 = self.driver.find_element_by_css_selector("[for='loginName']").text
  
          error_message2 = self.driver.find_element_by_css_selector("[for='textfield']").text
  
          self.assertEqual(error_message1, '用户名不能为空')
  
          self.assertEqual(error_message2, '密码不能为空')
  
      @unittest.skipIf(3 > 2, "3大于2，此用例不执行")
  
      def test_login3(self):
  
          '''用户名、密码正确'''
  
          self.driver.find_element_by_css_selector("[name='admin.loginName']").send_keys("autotest")
  
          self.driver.find_element_by_css_selector("[name='admin.password']").send_keys("")
  
          self.driver.find_element_by_css_selector("#imageField").click()
  
          sleep(1)
  
          self.driver.switch_to.frame("topFrame")
  
          username = self.driver.find_element_by_css_selector("#nav_top>ul>li>a").text
  
          self.assertEqual(username,"autotest")
  
      @unittest.skipUnless(3 < 2,"2没有大于3，此用例不执行")
  
      def test_login2(self):
  
          '''用户名正确，密码错误'''
  
          self.driver.find_element_by_css_selector("[name='admin.loginName']").send_keys("autotest")
  
          self.driver.find_element_by_css_selector("[name='admin.password']").send_keys("")
  
          self.driver.find_element_by_css_selector("#imageField").click()
  
          error_message = self.driver.find_element_by_css_selector(".errorMessage").text
  
          self.assertEqual(error_message, '密码错误,请重新输入!')
  
      @unittest.expectedFailure
  
      def test_login4(self):
  
          '''用户名不存在'''
  
          self.driver.find_element_by_css_selector("[name='admin.loginName']").send_keys("test007")
  
          self.driver.find_element_by_css_selector("[name='admin.password']").send_keys("")
  
          self.driver.find_element_by_css_selector("#imageField").click()
  
          error_message = self.driver.find_element_by_css_selector(".errorMessage").text
  
          self.assertEqual(error_message, '用户名不存在!')
  
      def test_login5(self):
  
          '''用户名为空'''
  
          self.driver.find_element_by_css_selector("[name='admin.password']").send_keys("")
  
          self.driver.find_element_by_css_selector("#imageField").click()
  
          error_message = self.driver.find_element_by_css_selector("[for='loginName']").text
  
          self.assertEqual(error_message, '用户不存在!')
  
      def test_login6(self):
  
          '''密码为空'''
  
          self.driver.find_element_by_css_selector("[name='admin.loginName']").send_keys("autotest")
  
          self.driver.find_element_by_css_selector("#imageField").click()
  
          error_message = self.driver.find_element_by_css_selector("[for='textfield']").text
  
          self.assertEqual(error_message, '密码不能为空')
  
  if __name__ == "__main__":
  
      unittest.main(verbosity=2)