有些用例需要在特定环境下执行，所以就要用掉用例跳过
    1.无条件跳过：@unittest.skip

    1.     @unittest.skip("无条件跳过")
    2.     def test_skip(self):
    3.         ret=calc("1-1")
    4.         self.assertEqual(2,ret)
    5.         print("跳过的用例")

    结果：不会执行
    image.png

    2.有条件跳过：@unittest.skipIf

    1. # 假如当前系统位window或者MacOS，就跳过
    2. @unittest.skipIf(sys.platform in ["win32","darwin"],"本地case,跳过")
    3.     def test_skip_if(self):
    4.         ret = calc("1-1")
    5.         self.assertEqual(2, ret)
    6.         print("跳过的用例")