What are some advanced examples of TDD in PHP?

What are some advanced examples of TDD in PHP?

Advanced TDD in PHP can include techniques like mocking, behavior-driven development, and integration testing. Would you like examples of each?

Yes, please provide an example of mocking.

Sure! In PHP, you can use PHPUnit's mocking framework to create a mock object. For instance, if you have a class that depends on a database connection, you can mock that dependency to isolate your tests.

Can you show me a code snippet for that?

Absolutely! Here's a simple example:

class UserService {
    private $db;

    public function __construct(Database $db) {
        $this->db = $db;
    }

    public function getUser($id) {
        return $this->db->find($id);
    }
}

// Test
public function testGetUser() {
    $mockDb = $this->createMock(Database::class);
    $mockDb->method('find')->willReturn(new User('John Doe'));
    $userService = new UserService($mockDb);
    $user = $userService->getUser(1);
    $this->assertEquals('John Doe', $user->getName());
}

This test isolates the UserService from the actual database.

That's really helpful! What about behavior-driven development?

Behavior-driven development (BDD) in PHP can be implemented using tools like Behat. It allows you to write tests in a natural language format, focusing on the behavior of your application.