class RevisionRouteProviderTest

class RevisionRouteProviderTest extends BrowserTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'block',
    'entity_test',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->drupalPlaceBlock('page_title_block');
  }
  
  /**
   * Tests title is from revision in context.
   */
  public function testRevisionTitle() : void {
    $entity = EntityTestRev::create();
    $entity->setName('first revision, view revision')
      ->setNewRevision();
    $entity->save();
    $revisionId = $entity->getRevisionId();
    // A default revision is created to ensure it is not pulled from the
    // non-revision entity parameter.
    $entity->setName('second revision, view revision')
      ->setNewRevision();
    $entity->isDefaultRevision(TRUE);
    $entity->save();
    // Reload the object.
    /** @var \Drupal\Core\Entity\RevisionableStorageInterface $storage */
    $storage = \Drupal::entityTypeManager()->getStorage('entity_test_rev');
    $revision = $storage->loadRevision($revisionId);
    $this->drupalGet($revision->toUrl('revision'));
    $this->assertSession()
      ->responseContains('first revision');
    $this->assertSession()
      ->responseNotContains('second revision');
  }

}