class BigPipePreviewTest

class BigPipePreviewTest extends WebDriverTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'big_pipe',
    'user',
    'big_pipe_bypass_js',
    'big_pipe_test',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'big_pipe_test_theme';
  
  /**
   * Test preview functionality within placeholders.
   */
  public function testLazyLoaderPreview() : void {
    $user = $this->drupalCreateUser([]);
    $display_name = $user->getDisplayName();
    $this->drupalLogin($user);
    $this->drupalGet('big_pipe_test_preview');
    // This test begins with the big_pipe_bypass_js module enabled, which blocks
    // Big Pipe's JavaScript from loading. Without that JavaScript, the
    // placeholder and previews are not replaced and we can reliably test their
    // presence.
    $this->assertSession()
      ->elementExists('css', '#placeholder-preview-twig-container [data-big-pipe-placeholder-id] > .i-am-taking-up-space');
    $this->assertSession()
      ->elementTextEquals('css', '#placeholder-preview-twig-container [data-big-pipe-placeholder-id] > .i-am-taking-up-space', 'LOOK AT ME I AM CONSUMING SPACE FOR LATER');
    $this->assertSession()
      ->elementTextNotContains('css', '#placeholder-preview-twig-container', $display_name);
    $this->assertSession()
      ->pageTextContains('There is a lamb and there is a puppy');
    $this->assertSession()
      ->elementTextEquals('css', '#placeholder-render-array-container [data-big-pipe-placeholder-id] > #render-array-preview', 'There is a lamb and there is a puppy');
    $this->assertSession()
      ->elementTextNotContains('css', '#placeholder-render-array-container', 'Llamas forever!');
    // Uninstall big_pipe_bypass_js.
    \Drupal::service('module_installer')->uninstall([
      'big_pipe_bypass_js',
    ]);
    $this->rebuildAll();
    $this->drupalGet('big_pipe_test_preview');
    $this->assertSession()
      ->waitForElementRemoved('css', '[data-big-pipe-placeholder-id]', 20000);
    $this->assertSession()
      ->elementTextContains('css', '#placeholder-preview-twig-container', $display_name);
    $this->assertSession()
      ->pageTextNotContains('LOOK AT ME I AM CONSUMING SPACE FOR LATER');
    $this->assertSession()
      ->elementTextContains('css', '#placeholder-render-array-container marquee', 'Llamas forever!');
    $this->assertSession()
      ->pageTextNotContains('There is a lamb and there is a puppy');
  }

}