class ControllerResolverTest

class ControllerResolverTest extends UnitTestCase {
    
    /**
     * The tested controller resolver.
     *
     * @var \Drupal\Core\Controller\ControllerResolver
     */
    public $controllerResolver;
    
    /**
     * The container.
     *
     * @var \Symfony\Component\DependencyInjection\ContainerBuilder
     */
    protected $container;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->container = new ContainerBuilder();
        $class_resolver = new ClassResolver($this->container);
        $callable_resolver = new CallableResolver($class_resolver);
        $this->controllerResolver = new ControllerResolver($callable_resolver);
    }
    
    /**
     * Tests createController().
     *
     * @dataProvider providerTestCreateController
     */
    public function testCreateController($controller, $class, $output) : void {
        $this->container
            ->set('some_service', new MockController());
        $result = $this->controllerResolver
            ->getControllerFromDefinition($controller);
        $this->assertCallableController($result, $class, $output);
    }
    
    /**
     * Provides test data for testCreateController().
     */
    public static function providerTestCreateController() {
        return [
            // Tests class::method.
[
                'Drupal\\Tests\\Core\\Controller\\MockController::getResult',
                'Drupal\\Tests\\Core\\Controller\\MockController',
                'This is a regular controller.',
            ],
            // Tests service:method.
[
                'some_service:getResult',
                'Drupal\\Tests\\Core\\Controller\\MockController',
                'This is a regular controller.',
            ],
            // Tests a class with injection.
[
                'Drupal\\Tests\\Core\\Controller\\MockContainerInjection::getResult',
                'Drupal\\Tests\\Core\\Controller\\MockContainerInjection',
                'This used injection.',
            ],
        ];
    }
    
    /**
     * Tests createController() with a non-existent class.
     */
    public function testCreateControllerNonExistentClass() : void {
        $this->expectException(\InvalidArgumentException::class);
        $this->controllerResolver
            ->getControllerFromDefinition('Class::method');
    }
    
    /**
     * Tests createController() with an invalid name.
     */
    public function testCreateControllerInvalidName() : void {
        $this->expectException(\LogicException::class);
        $this->controllerResolver
            ->getControllerFromDefinition('ClassWithoutMethod');
    }
    
    /**
     * Tests getController().
     *
     * @dataProvider providerTestGetController
     */
    public function testGetController($attributes, $class, $output = NULL) : void {
        $request = new Request([], [], $attributes);
        $result = $this->controllerResolver
            ->getController($request);
        if ($class) {
            $this->assertCallableController($result, $class, $output);
        }
        else {
            $this->assertFalse($result);
        }
    }
    
    /**
     * Provides test data for testGetController().
     */
    public static function providerTestGetController() {
        return [
            // Tests passing a controller via the request.
[
                [
                    '_controller' => MockContainerInjection::class . '::getResult',
                ],
                MockContainerInjection::class,
                'This used injection.',
            ],
            // Tests a request with no controller specified.
[
                [],
                FALSE,
            ],
        ];
    }
    
    /**
     * Tests getControllerFromDefinition().
     *
     * @dataProvider providerTestGetControllerFromDefinition
     */
    public function testGetControllerFromDefinition($definition, $output) : void {
        $this->container
            ->set('invoke_service', new MockInvokeController());
        $controller = $this->controllerResolver
            ->getControllerFromDefinition($definition);
        $this->assertCallableController($controller, NULL, $output);
    }
    
    /**
     * Provides test data for testGetControllerFromDefinition().
     */
    public static function providerTestGetControllerFromDefinition() {
        return [
            // Tests a method on an object.
[
                [
                    new MockController(),
                    'getResult',
                ],
                'This is a regular controller.',
            ],
            // Tests a function.
[
                'phpversion',
                phpversion(),
            ],
            // Tests an object using __invoke().
[
                new MockInvokeController(),
                'This used __invoke().',
            ],
            // Tests a class using __invoke().
[
                'Drupal\\Tests\\Core\\Controller\\MockInvokeController',
                'This used __invoke().',
            ],
            // Tests a service from the container using __invoke().
[
                'invoke_service',
                'This used __invoke().',
            ],
        ];
    }
    
    /**
     * Tests getControllerFromDefinition() without a callable.
     */
    public function testGetControllerFromDefinitionNotCallable() : void {
        $this->expectException(\InvalidArgumentException::class);
        $this->controllerResolver
            ->getControllerFromDefinition('Drupal\\Tests\\Core\\Controller\\MockController::bananas');
    }
    
    /**
     * Asserts that the controller is callable and produces the correct output.
     *
     * @param callable $controller
     *   A callable controller.
     * @param string|null $class
     *   Either the name of the class the controller represents, or NULL if it is
     *   not an object.
     * @param string|null $output
     *   The output expected for this controller.
     *
     * @internal
     */
    protected function assertCallableController(callable $controller, ?string $class, ?string $output) : void {
        if ($class) {
            $this->assertIsObject($controller[0]);
            $this->assertInstanceOf($class, $controller[0]);
        }
        $this->assertIsCallable($controller);
        $this->assertSame($output, call_user_func($controller));
    }

}