将命令行参数与 pytest --pyargs 一起使用 [英] Using Command Line Parameters with pytest --pyargs

问题描述

我已经为我使用如下结构编写的包编写了 pytest 单元测试:

I have written pytest unit tests for a package I've written with a structure like below:

• 包目录
  • setup.py
  • 我的包裹
    • __init__.py
    • 功能包
      • __init__.py
      • functionmodule.py
      • __init__.py
      • conftest.py
      • unit_tests
        • __init__.py
        • functionmodule_test.py

        现在 packagedir/mypackage/test/conftest.py 建立了两个必需的命令行参数，以作为测试的夹具.当我运行类似:

        Now packagedir/mypackage/test/conftest.py establishes two required command line parameters to be created as fixtures for the tests. When I run something like:

        pytest packagedir/mypackage/ --var1 foo --var2 bar
        

        所有测试都运行并且命令行参数被正确读入.但是，当我 pip install 包(它正确安装 test 和 unit_tests 包)然后尝试这样的事情时:

        All the tests run and the command line parameters are read in correctly. However, when I pip install the package (which installs the test and unit_tests packages correctly) and then try something like this:

        pytest --pyargs mypackage --var1 foo --var2 bar
        

        我收到这样的错误:

        usage: pytest [options] [file_or_dir] [file_or_dir] [...]
        pytest: error: unrecognized arguments: --var1 foo --var2 bar
        

        如果我跑:

        pytest --pyargs mypackage
        

        测试运行但失败，因为命令行参数不存在.

        the tests run but fail because the command line arguments are not present.

        有人可以向我解释这里可能出了什么问题吗?我可以猜测并说这是因为 --pyargs 参数改变了 pytest 的命令行参数的解释，但这只是一个猜测.我想知道是否有实际的方法可以解决这个问题.

        Can someone explain to me what might be going wrong here? I could guess and say this is because the --pyargs argument changes the interpretation of the command line parameters for pytest, but it's just a guess. I'd like to know if there is an actual way I could fix this.

        总体目标是允许某人通过 pip install mypackage 进行安装，然后无需导航到安装的站点包位置即可轻松对其进行测试.

        推荐答案

        我在mypackage/test目录下添加了一个__main__.py并写了

        I added a __main__.py to the mypackage/test directory and wrote

        import os
        import sys
        
        HERE = os.path.dirname(__file__)
        
        if __name__ == "__main__":
            import pytest
            errcode = pytest.main([HERE] + sys.argv[1:])
            sys.exit(errcode)
        

        现在，我可以用

        python -m mypackage.test --myoption=works
        

        这在安装包时有效.

        您可以使用 travis 构建查看此操作:

        You can view this in action with a travis build:

        • 特拉维斯输出

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