class CommentBookTest

class CommentBookTest extends BrowserTestBase {
  use CommentTestTrait;
  
  /**
   * Modules to install.
   *
   * @var array
   */
  protected static $modules = [
    'book',
    'comment',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    // Create comment field on book.
    $this->addDefaultCommentField('node', 'book');
  }
  
  /**
   * Tests comments in book export.
   */
  public function testBookCommentPrint() {
    $book_node = Node::create([
      'type' => 'book',
      'title' => 'Book title',
      'body' => 'Book body',
    ]);
    $book_node->book['bid'] = 'new';
    $book_node->save();
    $comment_subject = $this->randomMachineName(8);
    $comment_body = $this->randomMachineName(8);
    $comment = Comment::create([
      'subject' => $comment_subject,
      'comment_body' => $comment_body,
      'entity_id' => $book_node->id(),
      'entity_type' => 'node',
      'field_name' => 'comment',
      'status' => CommentInterface::PUBLISHED,
    ]);
    $comment->save();
    $commenting_user = $this->drupalCreateUser([
      'access printer-friendly version',
      'access comments',
      'post comments',
    ]);
    $this->drupalLogin($commenting_user);
    $this->drupalGet('node/' . $book_node->id());
    $this->assertSession()
      ->pageTextContains($comment_subject);
    $this->assertSession()
      ->pageTextContains($comment_body);
    $this->assertSession()
      ->pageTextContains('Add new comment');
    // Ensure that the comment form subject field exists.
    $this->assertSession()
      ->fieldExists('subject[0][value]');
    $this->drupalGet('book/export/html/' . $book_node->id());
    $this->assertSession()
      ->pageTextContains('Comments');
    $this->assertSession()
      ->pageTextContains($comment_subject);
    $this->assertSession()
      ->pageTextContains($comment_body);
    $this->assertSession()
      ->pageTextNotContains('Add new comment');
    // Verify that the comment form subject field is not found.
    $this->assertSession()
      ->fieldNotExists('subject[0][value]');
  }

}