pytest分布式执行插件 pytest-xdist 的高级用法

自动化测试小dao2023-12-26 21:08

想要使用多个CPU核心来进行测试，可以使用 -n 参数( 或者 --numprocesses)

(使用8个核心来跑测试用例)

|---|---------------|
| 1 | pytest -n 8 |

使用 -n auto 参数可以利用电脑的所有核心来跑测试用例

测试时使用的算法可以根据--dist命令参数定制：

  • --dist load(默认选项)：给每个CPU核心随机分配用例，不保证执行顺序。
  • --dist loadscope：对于测试函数，测试按模块分组，对于测试方法，测试按类分组。每组作为一个整体分配给可用的worker。这保证了组中的所有测试都在同一进程中运行。如果的模块级或类级fixtures，这将非常有用。按类分组优先于按模块分组。
  • --dist loadfile: 测试用例按其所在文件分组。每组作为一个整体分配给可用的worker。这保证了文件中的所有测试都在同一个辅助进程中运行。
  • --dist loadgroup: 测试按xdist_group标记分组。每组作为一个整体分配给可用的执行器。这保证了具有相同xdist_ group名称的所有测试都在同一个worker中运行。

|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 5 6 7 8 | @pytest``.mark.xdist_group(name``=``"group1"``) def test1(): ``pass class TestA: ``@pytest``.mark.xdist_group(``"group1"``) ``def test2(): ``pass``- |

这将确保test1和TestA:：test2将在同一个worker中运行。没有xdist_ group标记的测试在--dist=load模式下正常运行。

  • --dist no：正常的pytest执行模式，一次运行一个测试（完全没有分发）。

例子：

项目目录结构

xdist_test.py

|-------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | import logging import pytest class TestXdist(``object``): ``@pytest``.mark.xdist_group(``"group1"``) ``def test_one(``self``): ``logging.info(``"1"``) ``assert True ``@pytest``.mark.xdist_group(``"group1"``) ``def test_two(``self``): ``logging.info(``"2"``) ``assert True ``@pytest``.mark.xdist_group(``"group2"``) ``def test_three(``self``): ``logging.info(``"3"``) ``assert True ``@pytest``.mark.xdist_group(``"group2"``) ``def test_four(``self``): ``logging.info(``"4"``) ``assert True |

xdist_dummy_test.py

|-------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | import logging import pytest class TestXdist(``object``): ``@pytest``.mark.run(order``=``1``) ``@pytest``.mark.xdist_group(``"group1"``) ``def test_dummy_one(``self``): ``logging.info(``"d1"``) ``assert True ``@pytest``.mark.xdist_group(``"group1"``) ``@pytest``.mark.run(order``=``2``) ``def test_dummy_two(``self``): ``logging.info(``"d2"``) ``assert True ``@pytest``.mark.run(order``=``3``) ``@pytest``.mark.xdist_group(``"group2"``) ``def test_dummy_three(``self``): ``logging.info(``"d3"``) ``assert True ``@pytest``.mark.xdist_group(``"group2"``) ``@pytest``.mark.run(order``=``4``) ``def test_dummy_four(``self``): ``logging.info(``"d4"``) ``assert True |

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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | (venv) ➜ pytest pytest ``-``n auto ``-``-``dist loadscope =``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``= test session starts ``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``= platform darwin ``-``- Python ``3.8``.``9``, pytest``-``7.1``.``2``, pluggy``-``1.0``.``0 rootdir: ``/``Users``/``spock``/``PycharmProjects``/``pytest, configfile: pytest.ini plugins: xdist``-``2.5``.``0``, forked``-``1.4``.``0``, ordering``-``0.6 [gw0] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw1] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw2] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw3] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw4] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw5] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw6] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw7] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] gw0 [``8``] ``/ gw1 [``8``] ``/ gw2 [``8``] ``/ gw3 [``8``] ``/ gw4 [``8``] ``/ gw5 [``8``] ``/ gw6 [``8``] ``/ gw7 [``8``] scheduling tests via LoadScopeScheduling test2``/``xdist_dummy_test.py::TestXdist::test_dummy_one test``/``xdist_test.py::TestXdist::test_one [gw0] [ ``12``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_one [gw1] [ ``25``%``] PASSED test``/``xdist_test.py::TestXdist::test_one test2``/``xdist_dummy_test.py::TestXdist::test_dummy_two test``/``xdist_test.py::TestXdist::test_two [gw1] [ ``37``%``] PASSED test``/``xdist_test.py::TestXdist::test_two test``/``xdist_test.py::TestXdist::test_three [gw0] [ ``50``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_two test2``/``xdist_dummy_test.py::TestXdist::test_dummy_three [gw1] [ ``62``%``] PASSED test``/``xdist_test.py::TestXdist::test_three test``/``xdist_test.py::TestXdist::test_four [gw0] [ ``75``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_three test2``/``xdist_dummy_test.py::TestXdist::test_dummy_four [gw1] [ ``87``%``] PASSED test``/``xdist_test.py::TestXdist::test_four [gw0] [``100``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_four =``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``= 8 passed ``in 0.40s =``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``= |

|----------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | (venv) ➜ pytest pytest ``-``n auto ``-``-``dist loadfile =``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``= test session starts ``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``= platform darwin ``-``- Python ``3.8``.``9``, pytest``-``7.1``.``2``, pluggy``-``1.0``.``0 rootdir: ``/``Users``/``spock``/``PycharmProjects``/``pytest, configfile: pytest.ini plugins: xdist``-``2.5``.``0``, forked``-``1.4``.``0``, ordering``-``0.6 [gw0] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw1] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw2] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw3] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw4] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw5] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw6] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw7] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] gw0 [``8``] ``/ gw1 [``8``] ``/ gw2 [``8``] ``/ gw3 [``8``] ``/ gw4 [``8``] ``/ gw5 [``8``] ``/ gw6 [``8``] ``/ gw7 [``8``] scheduling tests via LoadFileScheduling test``/``xdist_test.py::TestXdist::test_one test2``/``xdist_dummy_test.py::TestXdist::test_dummy_one [gw1] [ ``12``%``] PASSED test``/``xdist_test.py::TestXdist::test_one [gw0] [ ``25``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_one test``/``xdist_test.py::TestXdist::test_two test2``/``xdist_dummy_test.py::TestXdist::test_dummy_two [gw1] [ ``37``%``] PASSED test``/``xdist_test.py::TestXdist::test_two [gw0] [ ``50``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_two test2``/``xdist_dummy_test.py::TestXdist::test_dummy_three test``/``xdist_test.py::TestXdist::test_three [gw1] [ ``62``%``] PASSED test``/``xdist_test.py::TestXdist::test_three [gw0] [ ``75``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_three test2``/``xdist_dummy_test.py::TestXdist::test_dummy_four test``/``xdist_test.py::TestXdist::test_four [gw1] [ ``87``%``] PASSED test``/``xdist_test.py::TestXdist::test_four [gw0] [``100``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_four =``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``= 8 passed ``in 0.38s =``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``= |

|----------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | (venv) ➜ pytest pytest ``-``n auto ``-``-``dist loadgroup =``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``= test session starts ``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``=``= platform darwin ``-``- Python ``3.8``.``9``, pytest``-``7.1``.``2``, pluggy``-``1.0``.``0 rootdir: ``/``Users``/``spock``/``PycharmProjects``/``pytest, configfile: pytest.ini plugins: xdist``-``2.5``.``0``, forked``-``1.4``.``0``, ordering``-``0.6 [gw0] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw1] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw2] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw3] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw4] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw5] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw6] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] [gw7] Python ``3.8``.``9 (default, May ``17 2022``, ``12``:``55``:``41``) ``-``- [Clang ``13.1``.``6 (clang``-``1316.0``.``21.2``.``5``)] gw0 [``8``] ``/ gw1 [``8``] ``/ gw2 [``8``] ``/ gw3 [``8``] ``/ gw4 [``8``] ``/ gw5 [``8``] ``/ gw6 [``8``] ``/ gw7 [``8``] scheduling tests via LoadGroupScheduling test2``/``xdist_dummy_test.py::TestXdist::test_dummy_three@group2 test2``/``xdist_dummy_test.py::TestXdist::test_dummy_one@group1 [gw1] [ ``12``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_three@group2 test2``/``xdist_dummy_test.py::TestXdist::test_dummy_four@group2 [gw0] [ ``25``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_one@group1 [gw1] [ ``37``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_four@group2 test2``/``xdist_dummy_test.py::TestXdist::test_dummy_two@group1 [gw0] [ ``50``%``] PASSED test2``/``xdist_dummy_test.py::TestXdist::test_dummy_two@group1 test``/``xdist_test.py::TestXdist::test_three@group2 [gw1] [ ``62``%``] PASSED test``/``xdist_test.py::TestXdist::test_three@group2 test``/``xdist_test.py::TestXdist::test_four@group2 [gw1] [ ``75``%``] PASSED test``/``xdist_test.py::TestXdist::test_four@group2 test``/``xdist_test.py::TestXdist::test_one@group1 [gw0] [ ``87``%``] PASSED test``/``xdist_test.py::TestXdist::test_one@group1 test``/``xdist_test.py::TestXdist::test_two@group1 [gw0] [``100``%``] PASSED test``/``xdist_test.py::TestXdist::test_two@group1 |

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