与pytest并行运行单元测试? [英] Running unit tests in parallel with pytest?

问题描述

如何并行化用pytest编写的单元测试的执行?我可以选择哪些并行策略?

How can I parallelize the execution of the unit tests written with pytest? Which tactics of parallelism can I choose from?

推荐答案

为了并行运行pytest，您将需要安装

In order to run pytests in parallel you are going to need to install pytest-xdist. Please see the different parallelism tactics listed below, you can use any of those (however I can bet that one of those suits best for your particular case):

pip install pytest-xdist

# The most primitive case, sending tests to multiple CPUs:
pytest -n NUM

# Execute tests within 3 subprocesses.
pytest --dist=each --tx 3*popen//python=python3.6

# Execute tests in 3 forked subprocess. Won't work on windows.
pytest --dist=each --tx 3*popen//python=python3.6 --boxed

# Sending tests to the ssh slaves
pytest --dist=each --tx ssh=first_slave --tx ssh=seconds_slave --rsyncdir package package

# Sending tests to the socket server, link is available below.
python socketserver.py :8889 &
python socketserver.py :8890 &
pytest --dist=each --tx socket=localhost:8889 --tx socket=localhost:8890

您可以为--dist(-d)参数提供不同的值，该参数处理测试在工作人员之间分布的方式，有关

You can provide different values for --dist(-d) parameter, which handles the way tests are distributed across workers, see documentation for more information regarding the usage of --dist.

注意:执行测试后，

NOTE: Once tests are executed the socket_server.py is down. I suggest you running socket server from separate terminal windows for debugging purposes

您可以引入更复杂的流程，例如在已启动套接字服务器的"pytest worker"和另一个与之通信并充当"pytestRunner"的docker容器内在docker容器中运行测试.

You can introduce more complicated flows, for instance running tests inside docker containers with have started socket servers kind of "pytest workers" and another docker container which communicates to them and serve as "pytest runner".

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