class ResourceResponseValidatorTest

class ResourceResponseValidatorTest extends UnitTestCase {
    
    /**
     * The subscriber under test.
     *
     * @var \Drupal\jsonapi\EventSubscriber\ResourceResponseSubscriber
     */
    protected $subscriber;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Check that the validation class is available.
        if (!class_exists("\\JsonSchema\\Validator")) {
            $this->fail('The JSON Schema validator is missing. You can install it with `composer require justinrainbow/json-schema`.');
        }
        $module_handler = $this->prophesize(ModuleHandlerInterface::class);
        $module = $this->prophesize(Extension::class);
        $module_path = dirname(__DIR__, 4);
        $module->getPath()
            ->willReturn($module_path);
        $module_handler->getModule('jsonapi')
            ->willReturn($module->reveal());
        $subscriber = new ResourceResponseValidator($this->prophesize(LoggerInterface::class)
            ->reveal(), $module_handler->reveal(), '');
        $subscriber->setValidator();
        $this->subscriber = $subscriber;
    }
    
    /**
     * @covers ::validateResponse
     * @dataProvider validateResponseProvider
     */
    public function testValidateResponse($request, $response, $expected, $description) : void {
        // Expose protected ResourceResponseSubscriber::validateResponse() method.
        $object = new \ReflectionObject($this->subscriber);
        $method = $object->getMethod('validateResponse');
        $this->assertSame($expected, $method->invoke($this->subscriber, $response, $request), $description);
    }
    
    /**
     * Provides test cases for testValidateResponse.
     *
     * @return array
     *   An array of test cases.
     */
    public static function validateResponseProvider() {
        $defaults = [
            'route_name' => 'jsonapi.node--article.individual',
            'resource_type' => new ResourceType('node', 'article', NULL),
        ];
        $test_data = [
            // Test validation success.
[
                'json' => <<<'EOD'
{
  "data": {
    "type": "node--article",
    "id": "4f342419-e668-4b76-9f87-7ce20c436169",
    "attributes": {
      "nid": "1",
      "uuid": "4f342419-e668-4b76-9f87-7ce20c436169"
    }
  }
}
EOD
,
                'expected' => TRUE,
                'description' => 'Response validation flagged a valid response.',
            ],
            // Test validation failure: no "type" in "data".
[
                'json' => <<<'EOD'
{
  "data": {
    "id": "4f342419-e668-4b76-9f87-7ce20c436169",
    "attributes": {
      "nid": "1",
      "uuid": "4f342419-e668-4b76-9f87-7ce20c436169"
    }
  }
}
EOD
,
                'expected' => FALSE,
                'description' => 'Response validation failed to flag an invalid response.',
            ],
            // Test validation failure: "errors" at the root level.
[
                'json' => <<<'EOD'
{
  "data": {
  "type": "node--article",
    "id": "4f342419-e668-4b76-9f87-7ce20c436169",
    "attributes": {
    "nid": "1",
      "uuid": "4f342419-e668-4b76-9f87-7ce20c436169"
    }
  },
  "errors": [{}]
}
EOD
,
                'expected' => FALSE,
                'description' => 'Response validation failed to flag an invalid response.',
            ],
            // Test validation of an empty response passes.
[
                'json' => NULL,
                'expected' => TRUE,
                'description' => 'Response validation flagged a valid empty response.',
            ],
            // Test validation fails on empty object.
[
                'json' => '{}',
                'expected' => FALSE,
                'description' => 'Response validation flags empty array as invalid.',
            ],
        ];
        $test_cases = array_map(function ($input) use ($defaults) {
            [
                $json,
                $expected,
                $description,
                $route_name,
                $resource_type,
            ] = array_values($input + $defaults);
            return [
                static::createRequest($route_name, $resource_type),
                static::createResponse($json),
                $expected,
                $description,
            ];
        }, $test_data);
        return $test_cases;
    }
    
    /**
     * Helper method to create a request object.
     *
     * @param string $route_name
     *   The route name with which to construct a request.
     * @param \Drupal\jsonapi\ResourceType\ResourceType $resource_type
     *   The resource type for the requested route.
     *
     * @return \Symfony\Component\HttpFoundation\Request
     *   The mock request object.
     */
    protected static function createRequest(string $route_name, ResourceType $resource_type) : Request {
        $request = new Request();
        $request->attributes
            ->set(RouteObjectInterface::ROUTE_NAME, $route_name);
        $request->attributes
            ->set(Routes::RESOURCE_TYPE_KEY, $resource_type);
        return $request;
    }
    
    /**
     * Helper method to create a resource response from arbitrary JSON.
     *
     * @param string|null $json
     *   The JSON with which to create a mock response.
     *
     * @return \Drupal\rest\ResourceResponse
     *   The mock response object.
     */
    protected static function createResponse(?string $json = NULL) : ResourceResponse {
        $response = new ResourceResponse();
        if ($json) {
            $response->setContent($json);
        }
        return $response;
    }

}