详解pytest分布式执行插件 pytest-xdist 的高级用法

更新时间：2022年08月12日 10:41:49 作者：SoonPan

这篇文章主要介绍了pytest分布式执行插件 pytest-xdist 的高级用法,本文给大家介绍的非常详细，对大家的学习或工作具有一定的参考借鉴价值，需要的朋友可以参考下

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)

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。

@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

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

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

(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 ============================================================================

(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 ============================================================================

(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 

============================================================================ 8 passed in 0.40s ============================================================================

到此这篇关于pytest分布式执行插件 pytest-xdist 的高级用法的文章就介绍到这了,更多相关pytest分布式执行插件 pytest-xdist内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！

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详解pytest分布式执行插件 pytest-xdist 的高级用法

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