如何解决当远程模块具有 pytest_collection_modifyitems() 时，Pytest-xdist 抛出 AssertionError
我有一个需要由 xdist 执行的远程脚本，我通过钩子 pytest_xdist_getremotemodule() 提供，我正在执行一些集合更改，这些更改对所有节点都通过 pytest_collection_modifyitems() 执行，但是在 runtestloop 期间worker 因 AssertionError 失败
platform darwin -- Python 3.9.1,pytest-6.2.4,py-1.10.0,pluggy-0.13.1 -- /usr/local/opt/python@3.9/bin/python3.9
cachedir: .pytest_cache
rootdir: /Users/akhileshr/Projects/pytest_test,configfile: pytest.ini
plugins: xdist-2.2.1,easyread-0.1.0,forked-1.3.0
[gw0] darwin Python 3.9.1 cwd: /Users/akhileshr/Projects/pytest_test
[gw1] darwin Python 3.9.1 cwd: /Users/akhileshr/Projects/pytest_test
[gw0] Python 3.9.1 (default,Jan 8 2021,17:17:43) -- [Clang 12.0.0 (clang-1200.0.32.28)]
[gw1] Python 3.9.1 (default,17:17:43) -- [Clang 12.0.0 (clang-1200.0.32.28)]
gw0 [6] / gw1 [6]
scheduling tests via LoadScheduling
INTERNALERROR> Traceback (most recent call last):
INTERNALERROR> File "/usr/local/lib/python3.9/site-packages/_pytest/main.py",line 269,in wrap_session
INTERNALERROR> session.exitstatus = doit(config,session) or 0
INTERNALERROR> File "/usr/local/lib/python3.9/site-packages/_pytest/main.py",line 323,in _main
INTERNALERROR> config.hook.pytest_runtestloop(session=session)
INTERNALERROR> File "/usr/local/lib/python3.9/site-packages/pluggy/hooks.py",line 286,in __call__
INTERNALERROR> return self._hookexec(self,self.get_hookimpls(),kwargs)
INTERNALERROR> File "/usr/local/lib/python3.9/site-packages/pluggy/manager.py",line 93,in _hookexec
INTERNALERROR> return self._inner_hookexec(hook,methods,line 84,in <lambda>
INTERNALERROR> self._inner_hookexec = lambda hook,kwargs: hook.multicall(
INTERNALERROR> File "/usr/local/lib/python3.9/site-packages/pluggy/callers.py",line 208,in _multicall
INTERNALERROR> return outcome.get_result()
INTERNALERROR> File "/usr/local/lib/python3.9/site-packages/pluggy/callers.py",line 80,in get_result
INTERNALERROR> raise ex[1].with_traceback(ex[2])
INTERNALERROR> File "/usr/local/lib/python3.9/site-packages/pluggy/callers.py",line 187,in _multicall
INTERNALERROR> res = hook_impl.function(*args)
INTERNALERROR> File "/usr/local/lib/python3.9/site-packages/xdist/dsession.py",line 112,in pytest_runtestloop
INTERNALERROR> self.loop_once()
INTERNALERROR> File "/usr/local/lib/python3.9/site-packages/xdist/dsession.py",line 135,in loop_once
INTERNALERROR> call(**kwargs)
INTERNALERROR> File "/Users/akhileshr/Projects/pytest_test/pytest_bypass.py",line 62,in worker_workerfinished
INTERNALERROR> assert not crashitem,(crashitem,node)
INTERNALERROR> AssertionError: ('dum_py.py::test_pytestDum',<WorkerController gw1>)
测试脚本有一个简单的断言语句 1==1
当我从远程脚本中删除 pytest_collection_modifyitems() 函数时，程序运行没有任何问题。有人能帮我理解这个问题的原因吗？
解决方法
您在文件 worker_workerfinished 中似乎有一个名为 /Users/akhileshr/Projects/pytest_test/pytest_bypass.py 的测试/夹具/函数，由于您实施了 pytest_collection_modifyitems()，它正在执行。这就是你的 AssertionError 出现的地方，在第 62 行：assert not crashitem,(crashitem,node)
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