drupal_find_theme_templates example

'#markup' => 'Foo',
      ],
    ];
    $this->assertThemeOutput('theme_test_render_element_children', $element, 'Foo', "\Drupal::service('renderer')->render() avoids #theme_wrappers recursion loop when rendering a render element.");
  }

  /** * Tests drupal_find_theme_templates(). */
  public function testFindThemeTemplates() {
    $registry = $this->container->get('theme.registry')->get();
    $templates = drupal_find_theme_templates($registry, '.html.twig', $this->getThemePath('test_theme'));
    $this->assertEquals('node--1', $templates['node__1']['template'], 'Template node--1.html.twig was found in test_theme.');
  }

  /** * Tests the update registry is correct during theme install and uninstall. */
  public function testThemeUpdateManagement() {
    // Install modules the theme is dependent on and enable the post update     // function.     \Drupal::state()->set('test_theme_depending_on_modules.post_update', TRUE);
    \Drupal::service('module_installer')->install([
      

$this->config('system.theme')->set('default', 'test_theme')->save();
    $this->drupalCreateContentType(['type' => 'page']);
    // Enable debug, rebuild the service container, and clear all caches.     $parameters = $this->container->getParameter('twig.config');
    $parameters['debug'] = TRUE;
    $this->setContainerParameter('twig.config', $parameters);
    $this->rebuildContainer();
    $this->resetAll();

    $cache = $this->container->get('theme.registry')->get();
    // Create array of Twig templates.     $templates = drupal_find_theme_templates($cache, $extension, $this->getThemePath('test_theme'));
    $templates += drupal_find_theme_templates($cache, $extension, $this->getModulePath('node'));

    // Create a node and test different features of the debug markup.     $node = $this->drupalCreateNode();
    $builder = \Drupal::entityTypeManager()->getViewBuilder('node');
    $build = $builder->view($node);
    $output = $renderer->renderRoot($build);
    $this->assertStringContainsString('<!-- THEME DEBUG -->', $output, 'Twig debug markup found in theme output when debug is enabled.');
    $this->assertStringContainsString("THEME HOOK: 'node'", $output, 'Theme call information found.');
    $this->assertStringContainsString('* node--1--full' . $extension . PHP_EOL . ' x node--1' . $extension . PHP_EOL . ' * node--page--full' . $extension . PHP_EOL . ' * node--page' . $extension . PHP_EOL . ' * node--full' . $extension . PHP_EOL . ' * node' . $extension, $output, 'Suggested template files found in order and node ID specific template shown as current template.');
    $this->assertStringContainsString(Html::escape('node--<script type="text/javascript">alert(\'yo\');</script>'), (string) $output);