Renderer example

$keys[] = 'stark';
              break;

            default:
              $keys[] = $context_id;
          }
        }
        return new ContextCacheKeys($keys);
      });
    $this->placeholderGenerator = new PlaceholderGenerator($this->rendererConfig);
    $this->renderCache = new PlaceholderingRenderCache($this->requestStack, $this->cacheFactory, $this->cacheContextsManager, $this->placeholderGenerator);
    $this->renderer = new Renderer($this->controllerResolver, $this->themeManager, $this->elementInfo, $this->placeholderGenerator, $this->renderCache, $this->requestStack, $this->rendererConfig);

    $container = new ContainerBuilder();
    $container->set('cache_contexts_manager', $this->cacheContextsManager);
    $container->set('render_cache', $this->renderCache);
    $container->set('renderer', $this->renderer);
    \Drupal::setContainer($container);
  }

  /** * Generates a random context value for the placeholder tests. * * The #context array used by the placeholder #lazy_builder callback will * generally be used to provide metadata like entity IDs, field machine names, * paths, etc. for JavaScript replacement of content or assets. In this test, * the #lazy_builder callback PlaceholdersTest::callback() renders the context * inside test HTML, so using any random string would sometimes cause random * test failures because the test output would be unparseable. Instead, we * provide random tokens for replacement. * * @see PlaceholdersTest::callback() * @see https://www.drupal.org/node/2151609 */

$this->redirectDestination = $this->createMock('\Drupal\Core\Routing\RedirectDestinationInterface');

    $this->viewAjaxController = new ViewAjaxController($this->viewStorage, $this->executableFactory, $this->renderer, $this->currentPath, $this->redirectDestination);

    $element_info_manager = $this->createMock('\Drupal\Core\Render\ElementInfoManagerInterface');
    $element_info_manager->expects($this->any())
      ->method('getInfo')
      ->with('status_messages')
      ->willReturn([]);
    $request_stack = new RequestStack();
    $request_stack->push(new Request());
    $this->renderer = new Renderer(
      $this->createMock('\Drupal\Core\Controller\ControllerResolverInterface'),
      $this->createMock('\Drupal\Core\Theme\ThemeManagerInterface'),
      $element_info_manager,
      $this->createMock('\Drupal\Core\Render\PlaceholderGeneratorInterface'),
      $this->createMock('\Drupal\Core\Render\RenderCacheInterface'),
      $request_stack,
      [
        'required_cache_contexts' => [
          'languages:language_interface',
          'theme',
        ],
      ]

/** * Renders the current node * * @param \Peast\Formatter\Base $formatter Formatter to use for the * rendering * * @return string */
    public function render(\Peast\Formatter\Base $formatter)
    {
        $renderer = new \Peast\Renderer();
        return $renderer->setFormatter($formatter)->render($this);
    }
    
    /** * Asserts that the given value is an array of defined type * * @param mixed $params Value to check * @param string|array $classes Class or array of classes to check against * @param bool $allowNull If true, null values are allowed * * @return void * * @codeCoverageIgnore */

    $data = file_get_contents($js_asset['data']);
    if ($encoding = (Unicode::encodingFromBOM($data))) {
      $data = mb_substr(Unicode::convertToUtf8($data, $encoding), 1);
    }
    // If no BOM is found, check for the charset attribute.     elseif (isset($js_asset['attributes']['charset'])) {
      $data = Unicode::convertToUtf8($data, $js_asset['attributes']['charset']);
    }
    // Remove comments, whitespace, and optional braces.     try {
      $ast = Peast::latest($data)->parse();
      $renderer = new Renderer();
      $renderer->setFormatter(new CompactFormatter());
      return $renderer->render($ast);
    }
    catch (\Exception $exception) {
      if ($exception instanceof PeastSyntaxException) {
        $position = $exception->getPosition();
        Error::logException($this->logger, $exception, 'Syntax error: @message, File: @asset_file, Line: @asset_line, Column: @asset_column, Index: @asset_index', [
          '@asset_file' => $js_asset['data'],
          '@asset_line' => $position->getLine(),
          '@asset_column' => $position->getColumn(),
          '@asset_index' => $position->getIndex(),
        ]);