PHP REST API 테스트 및 디버깅 방법

use PHPUnit\Framework\TestCase;

class ExampleControllerTest extends TestCase
{
    public function testIndex()
    {
        $controller = new ExampleController();
        $response = $controller->index();
        $this->assertEquals('Welcome to the API', $response);
    }
}

use GuzzleHttp\Client;

class IntegrationTest extends TestCase
{
    public function testCreate()
    {
        $client = new Client();
        $response = $client->post('http://localhost/api/example', [
            'body' => '{"name": "John"}'
        ]);
        $this->assertEquals(201, $response->getStatusCode());
    }
}

use Behat\Behat\Context\Context;
use Behat\Gherkin\Node\PyStringNode;

class FeatureContext implements Context
{
    private $client;

    /** @BeforeScenario */
    public function initClient()
    {
        $this->client = new WebDriver('localhost', 4444);
    }

    /** @AfterScenario */
    public function closeClient()
    {
        $this->client->close();
    }

    /**
     * @When I send a GET request to "api/example"
     */
    public function whenISendAGetRequestToApiExample()
    {
        $this->client->get('http://localhost/api/example');
    }

    /**
     * @Then I should get a response code of 200
     */
    public function thenIShouldGetAResponseCodeOf200()
    {
        $this->assertEquals(200, $this->client->getResponseCode());
    }
}