{"id":161,"date":"2022-05-01T22:21:00","date_gmt":"2022-05-01T22:21:00","guid":{"rendered":"https:\/\/www.mitango.app\/?p=161"},"modified":"2024-11-11T22:35:44","modified_gmt":"2024-11-11T22:35:44","slug":"create-unit-tests-for-wordpress-plugin","status":"publish","type":"post","link":"https:\/\/www.mitango.app\/fr\/2022\/05\/01\/create-unit-tests-for-wordpress-plugin\/","title":{"rendered":"Create Unit tests for WordPress Plugin"},"content":{"rendered":"

<\/a><\/p>\n\n\n\n

Automated tests are the base of modern programming development process and are as important as the architecture from the code itself.<\/p>\n\n\n\n

As they are what prevent regression in your project preventing your project to crumble on itself.<\/p>\n\n\n\n

In this article, we will focus more particularly on unit test.<\/p>\n\n\n\n

The main objective from an unit test is to make sure everything is working well inside a class due to this our tests will always focus on one class.<\/p>\n\n\n\n

For this we will use the most used PHP test library PHPUnit<\/strong><\/a> but other libraries exists and tools we will use in this article adapt to most of the frameworks.<\/p>\n\n\n\n

Configure PHPUnit<\/h2>\n\n\n\n

The first step when creating unit tests is to install our environment.<\/p>\n\n\n\n

For that we will first to create a\u00a0Composer<\/strong><\/a>\u00a0project if this is not done.<\/p>\n\n\n\n

On Ubuntu, we can install\u00a0Composer<\/strong><\/a>\u00a0with the following command:<\/p>\n\n\n\n

sudo apt install composer<\/code><\/pre>\n\n\n\n
Once this is done, you can move to the project folder (plugin or theme folder) and run this command to create the Composer<\/strong><\/a> project:<\/p>\n\n\n\n
composer init<\/code><\/pre>\n\n\n\n
Once this is done a file called composer.json<\/em><\/strong> should have been created.<\/p>\n\n\n\n
If so we can start to add PHPUnit<\/strong><\/a> to the project with the following command:<\/p>\n\n\n\n
composer require --dev phpunit\/phpunit<\/code><\/pre>\n\n\n\n
Then we can install the project with the following command:<\/p>\n\n\n\n
composer install<\/code><\/pre>\n\n\n\n
Once this step is done a new file called composer.lock<\/em><\/strong> and a vendor<\/em><\/strong> folder should have been created.<\/p>\n\n\n\n
At this level\u00a0PHPUnit<\/strong><\/a>\u00a0is installed but not configured into your project.<\/p>\n\n\n\n
For that, we will first create a folder\u00a0tests<\/em><\/strong>\u00a0that we will fill with the files used to create tests and configure\u00a0PHPUnit<\/strong><\/a>.<\/p>\n\n\n\n
In that folder tests<\/em><\/strong> we will create another folder Unit<\/em><\/strong> that will be used for our unit tests. This is not mandatory but it will organize your tests better as there is not only unit tests and it is more practical to separate them.<\/p>\n\n\n\n
In that folder we will have to create 3 files to configure\u00a0PHPUnit<\/strong><\/a>:<\/p>\n\n\n\n