Code for http://lakion.com/blog/tdd-your-api-with-symfony-and-phpunit

ProductApiTest.php

<?php

namespace AppBundle\Tests\Controller;

use Lakion\ApiTestCase\JsonApiTestCase;
use Symfony\Component\HttpFoundation\Response;

class ProductApiTest extends JsonApiTestCase
{
    function testCreatePostResponse()
    {
        $data =
<<<EOT
        {
            "name": "Star Wars T-Shirt",
            "sku": "SWTS",
            "price": 50
        }
EOT;
        $this->client->request('POST', '/products/', [], [], [
            'CONTENT_TYPE' => 'application/json',
        ], $data);
        $response = $this->client->getResponse();
        
        $this->assertResponse($response, 'products/create_response' , Response::HTTP_CREATED);
    }
}