## 前言 场景：存在一个增删改查相关的操作功能，当增加操作用例失败时，删除、修改、查询操作不执行，这种场景该怎么来处理呢？ Pytest 框架提供了一个`pytest-dependency` 插件帮我们做了这件事情，我们只需要简单的使用即可。 ## pytest-dependency 详解 (建议掌握程度：☆☆☆☆) ### 安装 - 在命令行窗口输入： `pip install pytest-dependency` - 查看安装版本：`pip show pytest-dependency`  ### 使用 使用方法 ： 用 `@pytest.mark.dependency()`对所依赖的用例进行标记，使用`@pytest.mark.dependency(depends=["测试用例名称"])` 引用依赖,测试用例名称可以是多个 说明：当依赖的用例执行失败，被依赖的用例直接跳过 **依赖用例失败示例：** ```python # !/usr/bin/python3 # _*_coding:utf-8 _*_ """" # @Time　　:2021/7/9 23:54 # @Author　 : king # @File　　 :test_dependency.py # @Software :PyCharm # @blog :https://blog.csdn.net/u010454117 # @WeChat Official Account: 【测试之路笔记】 """ import pytest @pytest.mark.dependency() def test_add(): print("我是 test_add 用例") assert False @pytest.mark.dependency(depends=["test_add"]) def test_update(): print("我是 test_update 用例") assert False @pytest.mark.dependency(depends=["test_add"]) def test_delete(): print("我是 test_delete 用例") assert True @pytest.mark.dependency(depends=["test_add"]) def test_select(): print("我是 test_select 用例") assert True if __name__ == '__main__': pytest.main(["-s"]) ``` **执行结果：** ```python Testing started at 23:59 ... F:\pytest_demo\Scripts\python.exe "D:\JetBrains\PyCharm 2019.2.5\helpers\pycharm\_jb_pytest_runner.py" --path E:/pytest_demo/class_05/test_dependency.py Launching pytest with arguments E:/pytest_demo/class_05/test_dependency.py in E:\pytest_demo\class_05 ============================= test session starts ============================= platform win32 -- Python 3.7.0, pytest-6.2.4, py-1.10.0, pluggy-0.13.1 -- F:\pytest_demo\Scripts\python.exe cachedir: .pytest_cache rootdir: E:\pytest_demo\class_05 plugins: assume-2.4.3, dependency-0.5.1, ordering-0.6, rerunfailures-10.1 collecting ... collected 4 items test_dependency.py::test_add FAILED [ 25%]我是 test_add 用例 test_dependency.py:13 (test_add) @pytest.mark.dependency() def test_add(): print("我是 test_add 用例") > assert False E assert False test_dependency.py:17: AssertionError test_dependency.py::test_update SKIPPED (test_update depends on test...) [ 50%] Skipped: test_update depends on test_add test_dependency.py::test_delete SKIPPED (test_delete depends on test...) [ 75%] Skipped: test_delete depends on test_add test_dependency.py::test_select SKIPPED (test_select depends on test...) [100%] Skipped: test_select depends on test_add ================================== FAILURES =================================== __________________________________ test_add ___________________________________ @pytest.mark.dependency() def test_add(): print("我是 test_add 用例") > assert False E assert False test_dependency.py:17: AssertionError ---------------------------- Captured stdout call ----------------------------- 我是 test_add 用例 =========================== short test summary info =========================== FAILED test_dependency.py::test_add - assert False ======================== 1 failed, 3 skipped in 0.04s ========================= Process finished with exit code 0 Assertion failed Assertion failed ``` **依赖用例成功示例：** ```python # !/usr/bin/python3 # _*_coding:utf-8 _*_ """" # @Time　　:2021/7/9 23:54 # @Author　 : king # @File　　 :test_dependency.py # @Software :PyCharm # @blog :https://blog.csdn.net/u010454117 # @WeChat Official Account: 【测试之路笔记】 """ import pytest @pytest.mark.dependency() def test_add(): print("我是 test_add 用例") assert True @pytest.mark.dependency(depends=["test_add"]) def test_update(): print("我是 test_update 用例") assert False @pytest.mark.dependency(depends=["test_add"]) def test_delete(): print("我是 test_delete 用例") assert True @pytest.mark.dependency(depends=["test_add"]) def test_select(): print("我是 test_select 用例") assert True if __name__ == '__main__': pytest.main(["-s"]) ``` **执行结果：**  **多个依赖用例存在失败示例：** ```python # !/usr/bin/python3 # _*_coding:utf-8 _*_ """" # @Time　　:2021/7/9 23:54 # @Author　 : king # @File　　 :test_dependency.py # @Software :PyCharm # @blog :https://blog.csdn.net/u010454117 # @WeChat Official Account: 【测试之路笔记】 """ import pytest @pytest.mark.dependency() def test_add(): print("我是 test_add 用例") assert True @pytest.mark.dependency() def test_update(): print("我是 test_update 用例") assert False @pytest.mark.dependency(depends=["test_add", "test_update"]) def test_delete(): print("我是 test_delete 用例") assert True @pytest.mark.dependency(depends=["test_add"]) def test_select(): print("我是 test_select 用例") assert True if __name__ == '__main__': pytest.main(["-s"]) ``` **执行结果：**  ## 总结 - 用 `@pytest.mark.dependency()`对所依赖的用例进行标记，使用`@pytest.mark.dependency(depends=["测试用例名称"])` 引用依赖,测试用例名称可以是多个 - 用例多存在多个依赖时，只要存在一个依赖失败，被依赖用例就跳过，所有依赖成功才执行 以上为内容纯属个人理解，如有不足，欢迎各位大神指正，转载请注明出处! >**如果觉得文章不错，欢迎关注微信公众号，微信公众号每天推送相关测试技术文章** 个人微信号：搜索 【测试之路笔记】