class LayoutBuilderThemeSuggestionsTest

class LayoutBuilderThemeSuggestionsTest extends BrowserTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'layout_builder',
    'node',
    'layout_builder_theme_suggestions_test',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'starterkit_theme';
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->createContentType([
      'type' => 'bundle_with_section_field',
      'name' => 'Bundle with section field',
    ]);
    LayoutBuilderEntityViewDisplay::load('node.bundle_with_section_field.default')->enableLayoutBuilder()
      ->setOverridable()
      ->save();
    $this->createNode([
      'type' => 'bundle_with_section_field',
      'title' => 'A node title',
      'body' => [
        [
          'value' => 'This is content that the template should not render',
        ],
      ],
    ]);
    $this->drupalLogin($this->drupalCreateUser([
      'configure any layout',
    ]));
  }
  
  /**
   * Tests alterations of the layout list via preprocess functions.
   */
  public function testLayoutListSuggestion() {
    $page = $this->getSession()
      ->getPage();
    $assert_session = $this->assertSession();
    $this->drupalGet('node/1/layout');
    $page->clickLink('Add section');
    $assert_session->pageTextContains('layout_builder_theme_suggestions_test_preprocess_item_list__layouts');
  }
  
  /**
   * Tests that of view mode specific field templates are suggested.
   */
  public function testFieldBlockViewModeTemplates() {
    $assert_session = $this->assertSession();
    $this->drupalGet('node/1');
    // Confirm that content is displayed by layout builder.
    $assert_session->elementExists('css', '.block-layout-builder');
    // Text that only appears in the view mode specific template.
    $assert_session->pageTextContains('I am a field template for a specific view mode!');
    // The content of the body field should not be visible because it is
    // displayed via a template that does not render it.
    $assert_session->pageTextNotContains('This is content that the template should not render');
  }

}