python - pytester - testdir 找不到 pytest 插件

Question

我创建了一个示例插件。我想用 pytester 插件来测试它。文档引用:https://docs.pytest.org/en/latest/writing_plugins.html#testing-plugins

但是，pytester似乎没有找到需要测试的插件。

请找到我已经完成的file_setup。

poc_plugin
|- pytest_myplugin
|  |- plugin.py   
|- setup.py
|- pytest.ini
|- tests
   |- conftest.py
   |- test_myplugin.py

请找到我创建的文件

设置.py

from setuptools import setup, find_packages
setup(
    name="pytest-myplugin",
    include_package_data=True,
    python_requires=">=3.0, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
    install_requires=[
        "pytest>=5.3.5",
    ],
    setup_requires=["pytest-runner"],
    classifiers=[
        "Framework :: Pytest",
    ],
    packages=find_packages(include=["pytest_myplugin", "pytest_myplugin.*"]),
    test_suite="tests",
    entry_points={"pytest11": ["myplugin = pytest_myplugin.plugin"]},
    version="0.1.0",
)

pytest_myplugin/plugin.py

import pytest

def pytest_addoption(parser):
    """
    This is a pytest hook to add options from the command line.
    """
    group = parser.getgroup("pytest-jay")

    group.addoption(
        "--jay",
        action="store",
        dest="jay",
        default="package",
        help="A Sample option",
    )

conftest.py

pytest_plugins  = ["pytester"]

测试/test_plugin.pt

import pytest


test_sample_txt = """
def test_sample():
    assert True
    """

def test_pluging_one(testdir):
    """Make sure that pytest accepts our fixture."""

    # create a temporary pytest test module
    testdir.makepyfile(test_sample_txt)

    # run pytest with the following cmd args
    result = testdir.runpytest(
        '--jay=jay',
    )

    # fnmatch_lines does an assertion internally
    result.stdout.fnmatch_lines([
        '*::test_sample PASSED*',
    ])

    # make sure that that we get a '0' exit code for the testsuite
    assert result.ret == 0

pytest.ini

[pytest]
testpaths = tests

我得到的输出::

C:\Jay\Work\poc_plugin\tests\test_plugin.py:23: Failed
----------------------------------------------------------------------------------------- Captured stderr call ------------------------------------------------------------------------------------------
ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: --jay=jay
  inifile: None
  rootdir: C:\Users\jay.joshi\AppData\Local\Temp\pytest-of-jay.joshi\pytest-46\test_pluging_one0

======================================================================================== short test summary info ========================================================================================
FAILED tests/test_plugin.py::test_pluging_one - Failed: remains unmatched: '*::test_sample PASSED*'
=========================================================================================== 1 failed in 0.26s =====

为什么testdir找不到插件？

Answer 1

我认为对 pytester 和 testdir 固定装置的要求是插件应该安装在 python 环境中。

要安装插件的开发(当前)版本，您可以将-e参数与pip一起使用。

pip install -e <path_to_plugin>

或者您可以使用setup.py进行类似的操作

python setup.py develop

安装插件后，执行问题中的步骤即可解决问题。