我正在将一个 ~2000 方法测试套件从鼻子移植到pytest,因为django-nose不能很好地支持并行化。将鼻子换成 pytest 似乎效果很好,并且在添加python_files
它之后pytest.ini
发现几乎所有我们的测试。
最大的缺点是当我运行时-n 4
,测试套件变得比没有-n
标志慢。在整个套件的约 10% 子集上运行,它似乎是大约 20-30% 的平坦减速,尽管我所采用的时间相当嘈杂。作为开销,这在一定程度上是有意义的,但无论我选择多少进程,时间都不会下降。
运行--durations=20
显示每个设置阶段每个进程都需要几秒钟的时间,并且每个其他测试都会稍微变慢。
-vvv
列出运行时的测试,输出几乎完全序列化:
api/tests/VERSION_NUMBER.py::ATestCase::test_forbidden_methods <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::ATestCase::test_access_token <- api/testcases.py
api/tests/VERSION_NUMBER.py::ATestCase::test_create <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::ATestCase::test_create <- api/testcases.py
api/tests/VERSION_NUMBER.py::ATestCase::test_delete <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::ATestCase::test_delete <- api/testcases.py
api/tests/VERSION_NUMBER.py::ATestCase::test_patch <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::ATestCase::test_patch <- api/testcases.py
api/tests/VERSION_NUMBER.py::ATestCase::test_put <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::ATestCase::test_put <- api/testcases.py
api/tests/VERSION_NUMBER.py::ATestCase::test_retrieve <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::ATestCase::test_retrieve <- api/testcases.py
api/tests/VERSION_NUMBER.py::BTestCase::test_access_token <- api/testcases.py
[gw0] PASSED api/tests/VERSION_NUMBER.py::ATestCase::test_forbidden_methods <- api/testcases.py
api/tests/VERSION_NUMBER.py::ATestCase::test_list <- api/testcases.py
[gw0] PASSED api/tests/VERSION_NUMBER.py::ATestCase::test_list <- api/testcases.py
api/tests/VERSION_NUMBER.py::BTestCase::test_delete <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::BTestCase::test_access_token <- api/testcases.py
api/tests/VERSION_NUMBER.py::BTestCase::test_create <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::BTestCase::test_create <- api/testcases.py
api/tests/VERSION_NUMBER.py::BTestCase::test_list <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::BTestCase::test_list <- api/testcases.py
api/tests/VERSION_NUMBER.py::BTestCase::test_patch <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::BTestCase::test_patch <- api/testcases.py
api/tests/VERSION_NUMBER.py::BTestCase::test_put <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::BTestCase::test_put <- api/testcases.py
[gw0] PASSED api/tests/VERSION_NUMBER.py::BTestCase::test_delete <- api/testcases.py
api/tests/VERSION_NUMBER.py::BTestCase::test_forbidden_methods <- api/testcases.py
api/tests/VERSION_NUMBER.py::BTestCase::test_retrieve <- api/testcases.py
[gw0] PASSED api/tests/VERSION_NUMBER.py::BTestCase::test_forbidden_methods <- api/testcases.py
[gw1] PASSED api/tests/VERSION_NUMBER.py::BTestCase::test_retrieve <- api/testcases.py
除了少数例外,整个日志几乎总是“开始测试,从工作人员那里获得通过”。这让我相信有些东西正在序列化测试,但我对什么感到困惑。
我尝试禁用除 pytest 本身、pytest-xdist 和 pytest-django 之外的所有 pytest 插件,没有任何变化。