I am contributing to WP-CLI as a committer.
We sometimes need to run PHPUnit and Behat with the specific PHP version which I am not usually using.
And also, we sometimes need to run them for the specific WordPress version.
So, I developed a Docker based testing environment.
How to run Behat for WP-CLI command
If you want to run Behat for specific PHP version + WordPress version in your local machine, you can do it like following.
$ git clone email@example.com:wp-cli/core-command.git $ cd core-command $ curl -L https://raw.githubusercontent.com/miya0001/wpenv/master/run.sh | bash -s 5.6 4.6 $ docker exec -it wpenv bash
This example will start Docker container with the PHP 5.6 and WordPress 4.6 and login into the container.
Then you can run Behat like following.
$ composer update $ vendor/bin/behat
How to run PHPUnit for WordPress plugin
PHPUnit is pre-installed in my Docker image.
So, you can use this solution for testing your WordPress plugin.
$ wp scaffold plugin my-plugin $ cd wp-content/plugins/my-plugin
Then run Docker in the directory.
$ curl -L https://raw.githubusercontent.com/miya0001/wpenv/master/run.sh | bash -s 7.1 4.8 $ docker exec -it wpenv bash
Finally, run phpunit in the container.
Actually, I was using phpenv on my Mac, but I often have something problem with it.
I am hoping it would help you.