What is PHP unit testing and why is it important?

What is PHP unit testing and why is it important?

PHP unit testing is a method of testing individual units of source code to ensure they work as intended. It's important because it helps catch bugs early, improves code quality, and facilitates changes in the codebase.

How do I get started with unit testing in PHP?

To get started with unit testing in PHP, you can use PHPUnit, a popular testing framework. First, install it via Composer, then create test classes that extend PHPUnit's TestCase class.

Can you show me a simple example of a unit test?

Sure! Here's a simple example:

use PHPUnit\Framework\TestCase;

class MathTest extends TestCase {
    public function testAddition() {
        $this->assertEquals(4, 2 + 2);
    }
}

This test checks if the addition of 2 and 2 equals 4.

What are some best practices for writing unit tests?

Some best practices include writing tests that are independent, keeping them small and focused, naming them clearly, and running them frequently to catch issues early.