class DevelTwigExtensionTest

class DevelTwigExtensionTest extends KernelTestBase {
    use DevelDumperTestTrait;
    use MessengerTrait;
    
    /**
     * The user used in test.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $develUser;
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    public static $modules = [
        'devel',
        'user',
        'system',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        $this->installEntitySchema('user');
        $this->installSchema('system', 'sequences');
        $devel_role = Role::create([
            'id' => 'admin',
            'label' => 'Admin',
            'permissions' => [
                'access devel information',
            ],
        ]);
        $devel_role->save();
        $this->develUser = User::create([
            'name' => $this->randomMachineName(),
            'roles' => [
                $devel_role->id(),
            ],
        ]);
        $this->develUser
            ->save();
    }
    
    /**
     * {@inheritdoc}
     */
    public function register(ContainerBuilder $container) {
        parent::register($container);
        $parameters = $container->getParameter('twig.config');
        $parameters['debug'] = TRUE;
        $container->setParameter('twig.config', $parameters);
    }
    
    /**
     * Tests that Twig extension loads appropriately.
     */
    public function testTwigExtensionLoaded() {
        $twig_service = \Drupal::service('twig');
        $extension = $twig_service->getExtension(Debug::class);
        $this->assertEquals(get_class($extension), Debug::class, 'Debug Extension loaded successfully.');
    }
    
    /**
     * Tests that the Twig dump functions are registered properly.
     */
    public function testDumpFunctionsRegistered() {
        
        /** @var \Twig_SimpleFunction[] $functions */
        $functions = \Drupal::service('twig')->getFunctions();
        $dump_functions = [
            'devel_dump',
            'kpr',
        ];
        $message_functions = [
            'devel_message',
            'dpm',
            'dsm',
        ];
        $registered_functions = $dump_functions + $message_functions;
        foreach ($registered_functions as $name) {
            $function = $functions[$name];
            $this->assertTrue($function instanceof \Twig_SimpleFunction);
            $this->assertEquals($function->getName(), $name);
            $this->assertTrue($function->needsContext());
            $this->assertTrue($function->needsEnvironment());
            $this->assertTrue($function->isVariadic());
            is_callable($function->getCallable(), TRUE, $callable);
            if (in_array($name, $dump_functions)) {
                $this->assertEquals($callable, 'Drupal\\devel\\Twig\\Extension\\Debug::dump');
            }
            else {
                $this->assertEquals($callable, 'Drupal\\devel\\Twig\\Extension\\Debug::message');
            }
        }
    }
    
    /**
     * Tests that the Twig function for XDebug integration is registered properly.
     */
    public function testXdebugIntegrationFunctionsRegistered() {
        
        /** @var \Twig_SimpleFunction $function */
        $function = \Drupal::service('twig')->getFunction('devel_breakpoint');
        $this->assertTrue($function instanceof \Twig_SimpleFunction);
        $this->assertEquals($function->getName(), 'devel_breakpoint');
        $this->assertTrue($function->needsContext());
        $this->assertTrue($function->needsEnvironment());
        $this->assertTrue($function->isVariadic());
        is_callable($function->getCallable(), TRUE, $callable);
        $this->assertEquals($callable, 'Drupal\\devel\\Twig\\Extension\\Debug::breakpoint');
    }
    
    /**
     * Tests that the Twig extension's dump functions produce the expected output.
     */
    public function testDumpFunctions() {
        $template = 'test-with-context {{ twig_string }} {{ twig_array.first }} {{ twig_array.second }}{{ devel_dump() }}';
        $expected_template_output = 'test-with-context context! first value second value';
        $context = [
            'twig_string' => 'context!',
            'twig_array' => [
                'first' => 'first value',
                'second' => 'second value',
            ],
            'twig_object' => new \stdClass(),
        ];
        
        /** @var \Drupal\Core\Template\TwigEnvironment $environment */
        $environment = \Drupal::service('twig');
        // Ensures that the twig extension does nothing if the current
        // user has not the adequate permission.
        $this->assertTrue($environment->isDebug());
        $this->assertEquals($environment->renderInline($template, $context), $expected_template_output);
        \Drupal::currentUser()->setAccount($this->develUser);
        // Ensures that if no argument is passed to the function the twig context is
        // dumped.
        $output = (string) $environment->renderInline($template, $context);
        $this->assertStringContainsString($expected_template_output, $output, 'When no argument passed');
        $this->assertContainsDump($output, $context, 'Twig context');
        // Ensures that if an argument is passed to the function it is dumped.
        $template = 'test-with-context {{ twig_string }} {{ twig_array.first }} {{ twig_array.second }}{{ devel_dump(twig_array) }}';
        $output = (string) $environment->renderInline($template, $context);
        $this->assertStringContainsString($expected_template_output, $output, 'When one argument is passed');
        $this->assertContainsDump($output, $context['twig_array']);
        // Ensures that if more than one argument is passed the function works
        // properly and every argument is dumped separately.
        $template = 'test-with-context {{ twig_string }} {{ twig_array.first }} {{ twig_array.second }}{{ devel_dump(twig_string, twig_array.first, twig_array, twig_object) }}';
        $output = (string) $environment->renderInline($template, $context);
        $this->assertStringContainsString($expected_template_output, $output, 'When multiple arguments are passed');
        $this->assertContainsDump($output, $context['twig_string']);
        $this->assertContainsDump($output, $context['twig_array']['first']);
        $this->assertContainsDump($output, $context['twig_array']);
        $this->assertContainsDump($output, $context['twig_object']);
        // Clear messages.
        $this->messenger()
            ->deleteAll();
        $retrieve_message = function ($messages, $index) {
            return isset($messages['status'][$index]) ? (string) $messages['status'][$index] : NULL;
        };
        // Ensures that if no argument is passed to the function the twig context is
        // dumped.
        $template = 'test-with-context {{ twig_string }} {{ twig_array.first }} {{ twig_array.second }}{{ devel_message() }}';
        $output = (string) $environment->renderInline($template, $context);
        $this->assertStringContainsString($expected_template_output, $output, 'When no argument passed');
        $messages = \Drupal::messenger()->deleteAll();
        $this->assertDumpExportEquals($retrieve_message($messages, 0), $context, 'Twig context');
        // Ensures that if an argument is passed to the function it is dumped.
        $template = 'test-with-context {{ twig_string }} {{ twig_array.first }} {{ twig_array.second }}{{ devel_message(twig_array) }}';
        $output = (string) $environment->renderInline($template, $context);
        $this->assertStringContainsString($expected_template_output, $output, 'When one argument is passed');
        $messages = $this->messenger()
            ->deleteAll();
        $this->assertDumpExportEquals($retrieve_message($messages, 0), $context['twig_array']);
        // Ensures that if more than one argument is passed to the function works
        // properly and every argument is dumped separately.
        $template = 'test-with-context {{ twig_string }} {{ twig_array.first }} {{ twig_array.second }}{{ devel_message(twig_string, twig_array.first, twig_array, twig_object) }}';
        $output = (string) $environment->renderInline($template, $context);
        $this->assertStringContainsString($expected_template_output, $output, 'When multiple arguments are passed');
        $messages = $this->messenger()
            ->deleteAll();
        $this->assertDumpExportEquals($retrieve_message($messages, 0), $context['twig_string']);
        $this->assertDumpExportEquals($retrieve_message($messages, 1), $context['twig_array']['first']);
        $this->assertDumpExportEquals($retrieve_message($messages, 2), $context['twig_array']);
        $this->assertDumpExportEquals($retrieve_message($messages, 3), $context['twig_object']);
    }

}