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！

详解Django中的过滤器
这篇文章主要介绍了Django中的过滤器,Django是重多高人气Python框架中最为著名的一个,需要的朋友可以参考下
2015-07-07
举例详解Python中yield生成器的用法
这篇文章主要介绍了举例详解Python中yield生成器的用法,包括其在多线程multiprocess下的使用示例,非常推荐!需要的朋友可以参考下
2015-08-08
VScode中不同目录间python库函数的调用
本文主要介绍了VScode中不同目录间python库函数的调用，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧
2023-03-03
Python异步爬虫实现原理与知识总结
之前有很多小伙伴想看Python异步爬虫的有关知识总结,这次它来了,文中有非常详细的代码示例与注释,即使对刚开始学python的小伙伴也很友好,,需要的朋友可以参考下
2021-05-05
python脚本调用iftop 统计业务应用流量的思路详解
这篇文章主要介绍了python脚本调用iftop 统计业务应用流量的思路详解，本文给大家介绍的非常详细，具有一定的参考借鉴价值,需要的朋友可以参考下
2019-10-10
解决Pyinstaller 打包exe文件取消dos窗口(黑框框)的问题
今天小编就为大家分享一篇解决Pyinstaller 打包exe文件取消dos窗口(黑框框)的问题，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧
2019-06-06
Django中外键ForeignKey介绍使用
本文主要介绍了Django中外键ForeignKey介绍使用，文中通过示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
2022-02-02
pytorch常用数据类型所占字节数对照表一览
这篇文章主要介绍了pytorch常用数据类型所占字节数对照表一览，具有很好的参考价值，希望对大家有所帮助。如有错误或未考虑完全的地方，望不吝赐教
2021-05-05
python程序实现BTC（比特币）挖矿的完整代码
这篇文章主要介绍了python程序实现BTC（比特币）挖矿的完整代码,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
2021-01-01
Python 3.8中实现functools.cached_property功能
这篇文章主要介绍了Python 3.8中实现functools.cached_property功能,本文通过实例代码给大家介绍的非常详细，具有一定的参考借鉴价值，需要的朋友可以参考下
2019-05-05