class CommentCSSTest

class CommentCSSTest extends CommentTestBase {
    use GeneratePermutationsTrait;
    
    /**
     * The theme to install as the default for testing.
     *
     * @var string
     */
    protected $defaultTheme = 'starterkit_theme';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Allow anonymous users to see comments.
        user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, [
            'access comments',
            'access content',
        ]);
    }
    
    /**
     * Tests CSS classes on comments.
     */
    public function testCommentClasses() : void {
        // Create all permutations for comments, users, and nodes.
        $parameters = [
            'node_uid' => [
                0,
                $this->webUser
                    ->id(),
            ],
            'comment_uid' => [
                0,
                $this->webUser
                    ->id(),
                $this->adminUser
                    ->id(),
            ],
            'comment_status' => [
                CommentInterface::PUBLISHED,
                CommentInterface::NOT_PUBLISHED,
            ],
            'user' => [
                'anonymous',
                'authenticated',
                'admin',
            ],
        ];
        $permutations = $this->generatePermutations($parameters);
        foreach ($permutations as $case) {
            // Create a new node.
            $node = $this->drupalCreateNode([
                'type' => 'article',
                'uid' => $case['node_uid'],
            ]);
            // Add a comment.
            
            /** @var \Drupal\comment\CommentInterface $comment */
            $comment = Comment::create([
                'entity_id' => $node->id(),
                'entity_type' => 'node',
                'field_name' => 'comment',
                'uid' => $case['comment_uid'],
                'status' => $case['comment_status'],
                'subject' => $this->randomMachineName(),
                'language' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
                'comment_body' => [
                    LanguageInterface::LANGCODE_NOT_SPECIFIED => [
                        $this->randomMachineName(),
                    ],
                ],
            ]);
            $comment->save();
            // Adjust the current/viewing user.
            switch ($case['user']) {
                case 'anonymous':
                    if ($this->loggedInUser) {
                        $this->drupalLogout();
                    }
                    $case['user_uid'] = 0;
                    break;
                case 'authenticated':
                    $this->drupalLogin($this->webUser);
                    $case['user_uid'] = $this->webUser
                        ->id();
                    break;
                case 'admin':
                    $this->drupalLogin($this->adminUser);
                    $case['user_uid'] = $this->adminUser
                        ->id();
                    break;
            }
            // Request the node with the comment.
            $this->drupalGet('node/' . $node->id());
            $settings = $this->getDrupalSettings();
            // Verify the data-history-node-id attribute, which is necessary for the
            // by-viewer class and the "new" indicator, see below.
            $this->assertSession()
                ->elementsCount('xpath', '//*[@data-history-node-id="' . $node->id() . '"]', 1);
            // Verify classes if the comment is visible for the current user.
            if ($case['comment_status'] == CommentInterface::PUBLISHED || $case['user'] == 'admin') {
                // Verify the by-anonymous class.
                $comments = '//*[contains(@class, "comment") and contains(@class, "by-anonymous")]';
                if ($case['comment_uid'] == 0) {
                    $this->assertSession()
                        ->elementsCount('xpath', $comments, 1);
                }
                else {
                    $this->assertSession()
                        ->elementNotExists('xpath', $comments);
                }
                // Verify the by-node-author class.
                $comments = '//*[contains(@class, "comment") and contains(@class, "by-node-author")]';
                if ($case['comment_uid'] > 0 && $case['comment_uid'] == $case['node_uid']) {
                    $this->assertSession()
                        ->elementsCount('xpath', $comments, 1);
                }
                else {
                    $this->assertSession()
                        ->elementNotExists('xpath', $comments);
                }
                // Verify the data-comment-user-id attribute, which is used by the
                // drupal.comment-by-viewer library to add a by-viewer when the current
                // user (the viewer) was the author of the comment. We do this in Java-
                // Script to prevent breaking the render cache.
                $this->assertSession()
                    ->elementsCount('xpath', '//*[contains(@class, "comment") and @data-comment-user-id="' . $case['comment_uid'] . '"]', 1);
                $this->assertSession()
                    ->responseContains($this->getModulePath('comment') . '/js/comment-by-viewer.js');
            }
            // Verify the unpublished class.
            $comments = '//*[contains(@class, "comment") and contains(@class, "unpublished")]';
            if ($case['comment_status'] == CommentInterface::NOT_PUBLISHED && $case['user'] == 'admin') {
                $this->assertSession()
                    ->elementsCount('xpath', $comments, 1);
            }
            else {
                $this->assertSession()
                    ->elementNotExists('xpath', $comments);
            }
            // Verify the data-comment-timestamp attribute, which is used by the
            // drupal.comment-new-indicator library to add a "new" indicator to each
            // comment that was created or changed after the last time the current
            // user read the corresponding node.
            if ($case['comment_status'] == CommentInterface::PUBLISHED || $case['user'] == 'admin') {
                $this->assertSession()
                    ->elementsCount('xpath', '//*[contains(@class, "comment")]/*[@data-comment-timestamp="' . $comment->getChangedTime() . '"]', 1);
                $expectedJS = $case['user'] !== 'anonymous';
                $this->assertSame($expectedJS, isset($settings['ajaxPageState']['libraries']) && in_array('comment/drupal.comment-new-indicator', explode(',', $settings['ajaxPageState']['libraries'])), 'drupal.comment-new-indicator library is present.');
            }
        }
    }

}