What are some examples of TDD in PHP?

What are some examples of TDD in PHP?

Test-Driven Development (TDD) in PHP involves writing tests before the actual code. For example, you can start by writing a test for a simple calculator class that adds two numbers.

Can you show me a simple test case for that?

Sure! Here's a simple PHPUnit test case:

use PHPUnit\Framework\TestCase;

class CalculatorTest extends TestCase {
    public function testAdd() {
        $calculator = new Calculator();
        $this->assertEquals(4, $calculator->add(2, 2));
    }
}

What if I want to test a function that divides numbers?

You would write a similar test case for the divide function. For example:

public function testDivide() {
    $calculator = new Calculator();
    $this->assertEquals(2, $calculator->divide(4, 2));
}

How do I run these tests?

You can run your PHPUnit tests using the command line. Just navigate to your project directory and run vendor/bin/phpunit.