As a Magento Open Source Developer, you should have to write Unit Tests for our modules to validate our code is errorless and bug-free.
What is Unit Testing in Magento Open Source?
Unit Testing is a crucial operation, a set of the smallest testable parts of an application, which are called units, in the development of software. The unit testing will ensure that the codes you wrote are running correctly as well as raise the software quality you created before. In addition, remember that the unit testing process is separate and completely automatic without any manual handling.
Why Unit Test?
The main objective of Magento Open Source unit testing is to isolate written code to test and determine if it works as intended. Unit testing is an important step in the development process because if done correctly, it can help detect early flaws in code which may be more difficult to find in later testing stages. The unit test plays a role in improving the manageability like:
- Tests Reduce Bugs in New Features
- Tests Reduce Bugs in Existing Features
- Tests Are Good Documentation
- Tests Reduce the Cost of Change
- Tests Allow Refactoring
- Tests Constrain Features
- Tests Defend Against Other Programmers
- Testing Makes Development Faster
For creating Unit Tests don’t forget you’ll find the Unit Test in app/code/[Vendor]/[ModuleName]/Unit/Test
How to run Magento Open Source Unit Test?
In the below example of helper the unitTest function is defined which returns some value. We are going to test it through Unit Test.
Create a Unit Test file: app/code/Webkul/UnitTest/Unit/Test/Helper/DataTest.php
Running Unit Tests in the CLI
For running all Unit Tests
Running only a subset of the unit tests
To run only tests within a specific directory branch, all you have to do is to specify the directory branch after the command.
You’ll run the above command from Magento Open Source root then it will display the test result.
This is the basic introduction to Unit Testing in Magento Open Source and Adobe Commerce.