valu / wp-testing-tools
Testing tools for WordPress
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README
WordPress testing for everyone! 🤗
Testing WordPress plugins is PITA. The wp-browser project makes it possible but it requires a working WordPress installation to be used. Unfortunately setting up one is very laborious which is why many especially smaller plugins omit tests completely. So the humble mission of this project is make that barrier go away completely so there would be no excuses to not write tests for WordPress plugins! 💪
This project contains following components:
- A Composer installable script (
wp-install
) for installing WordPress into Docker containers, Github Actions or where ever. - Reuseable Docker enviroment for local testing and debugging with xdebug
- Github Action Workflow for continuous integration
- Example plugin on how to setup all this
Projects using this setup
- https://github.com/valu-digital/wp-graphql-cache
- https://github.com/valu-digital/wp-graphql-polylang
- https://github.com/valu-digital/wp-graphql-lock
- https://github.com/valu-digital/wp-graphql-offset-pagination
Starting
For new projects you can just copy all files from plugin/
and rename the
"example" strings.
For existing projects you can install this using composer
composer require --dev valu/wp-testing-tools
# You'll want the wp-browser too
composer require --dev lucatume/wp-browser
After installing you can copy the test files to your plugin with
./vendor/bin/wptt-configure
Plugin files
The example plugin is under the plugin/
directory. Lets go through it file
by file and explain the purpose of each.
composer.json
This is the main composer file which makes your plugin installable using Composer. Define any library dependencies of your plugin here but do not add other plugins here since your plugin users might want to install those by other means.
In it we define this package as a dev requirement under "require-dev"
with
"valu/wp-testing-tools": "^0.4.0"
.
But the most interesting part is the "wp-install"
script under "scripts"
:
wp-install --full --wp-composer-file composer.wp-install.json --env-file .env
This wp-install
tool is provided by this package and it actually does the
WordPress installation using wp-cli.
It takes few arguments
--full
: Make full installation for functional and acceptance testing. This can be omitted when just doing wpunit tests.--wp-composer-file
: Thecomposer.json
file to use when installing WordPress--env-file
: The .env file to use- The
--wp-composer-file
and--env-file
arguments are optional and the example is just showing the defaults - For more information see
--help
or the source.
composer.wp-install.json
Since we cannot add WP plugin dependencies to the main composer.json
we can
add them here and they get installed & activated to the testing installation
automatically.
.env
This file is copied from .env.github
or .env.docker
depending on the
environment. It contains the database credentials and the installation
location for WordPress. Checkout their content for more information.
codeception.dist.yml
The Codeception config. You must configure your plugin entry point (among
with the ones defined in composer.wp-install.json
) to the
modules.config.WPLoader.plugins
and
modules.config.WPLoader.activatePlugins
sections to be activated during
wpunit tests.
tests/
The directory containing the tests. Please refer to the Codeception and wp-browser documention.
docker/
This directory contains the Docker enviroment configuration. You as the
plugin author are not supposed to edit anything under this directory. Any
customizations you need should be doable in .env.docker
and other
extensions points. If you need some help customizing the Docker enviroment
feel free to open an issue!
This way the Docker enviroment is upgradeable. Just copy the latest version from this repository when you want to update to the latest version.
The docker directory exposes a run
script for working with the enviroment:
./docker/run compose
: This is a small wrapper overdocker-compose
which used to starts the Docker enviroment../docker/run shell
: Once the environment is setup you can use this script to enter the testing shell to runcodecept
commands./docker/run update
: When you update thevalu/wp-testing-tools
composer package this command can be used to update the Docker environment.
The plugin directory will be mounted to /app
so you can make changes from
the host and they are visible immediately to the container.
plugin.php
and src/
These are opinionated take on how to structure WordPress plugins with
Composer Autoloading. If you don't care about that or are adapting existing
plugin you can just remove these files along with the "autoload"
config
from composer.json
.
But if you do it's highly recommend that you read the comments in plugin.php. It contains information on how to ship your plugin properly to both composer and non-composer users.
Customizing the WP install for Functiontal Tests
You can add a tests/wptt-wp-config.php
which is required in the install's
wp-config.php
if it is readable.
You can also add tests/wptt-mu-plugin.php
which is loaded as a mu-plugin in
the install if it is readable.
Using XDebug with Docker
Visual Studio Code
Install the PHP Debug extension.
- Add launch config to
.vscode/launch.json
or to the global config:
{ "version": "0.2.0", "configurations": [ { "name": "Docker: PHP Listen for XDebug", "type": "php", "request": "launch", "port": 9000, "pathMappings": { "/app": "${workspaceFolder}" } } ] }
-
Start the container with
./docker/run compose
-
From the VSCode
DEBUG AND RUN
view start theDocker: PHP Listen for XDebug
launch config -
Add break points
-
Start testing shell
./docker/run shell
and run the tests withcodecept run wpunit
Profit!
PHPStorm
The IDEKEY is "wptt".
Please contribute?