What are some examples of Test-Driven Development in PHP?

What are some examples of Test-Driven Development in PHP?

Test-Driven Development (TDD) in PHP involves writing tests before the actual code. For example, you can use PHPUnit to create a test for a simple calculator class.

Can you show me a basic PHPUnit test example?

Sure! Here's a simple test for a Calculator class:

use PHPUnit\Framework\TestCase;

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

How do I run this test?

You can run the test using the command line. Navigate to your project directory and execute vendor/bin/phpunit tests/CalculatorTest.php.

What if the test fails?

If the test fails, you'll need to check your Calculator class implementation and ensure it meets the expected behavior defined in your test.