ForumTest.php in Drupal 8

Namespace

Drupal\Tests\forum\Functional

File

core/modules/forum/tests/src/Functional/ForumTest.php

<?php

namespace Drupal\Tests\forum\Functional;

use Drupal\Component\Render\FormattableMarkup;
use Drupal\Core\Entity\Entity\EntityFormDisplay;
use Drupal\Core\Entity\Entity\EntityViewDisplay;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Link;
use Drupal\Core\Url;
use Drupal\taxonomy\Entity\Vocabulary;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests for forum.module.
 *
 * Create, view, edit, delete, and change forum entries and verify its
 * consistency in the database.
 *
 * @group forum
 */
class ForumTest extends BrowserTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = [
    'taxonomy',
    'comment',
    'forum',
    'node',
    'block',
    'menu_ui',
    'help',
  ];

  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'classy';

  /**
   * A user with various administrative privileges.
   */
  protected $adminUser;

  /**
   * A user that can create forum topics and edit its own topics.
   */
  protected $editOwnTopicsUser;

  /**
   * A user that can create, edit, and delete forum topics.
   */
  protected $editAnyTopicsUser;

  /**
   * A user with no special privileges.
   */
  protected $webUser;

  /**
   * An administrative user who can bypass comment approval.
   */
  protected $postCommentUser;

  /**
   * An array representing a forum container.
   */
  protected $forumContainer;

  /**
   * An array representing a forum.
   */
  protected $forum;

  /**
   * An array representing a root forum.
   */
  protected $rootForum;

  /**
   * An array of forum topic node IDs.
   */
  protected $nids;

  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp();
    $this
      ->drupalPlaceBlock('system_breadcrumb_block');
    $this
      ->drupalPlaceBlock('page_title_block');

    // Create users.
    $this->adminUser = $this
      ->drupalCreateUser([
      'access administration pages',
      'administer modules',
      'administer blocks',
      'administer forums',
      'administer menu',
      'administer taxonomy',
      'create forum content',
      'access comments',
    ]);
    $this->editAnyTopicsUser = $this
      ->drupalCreateUser([
      'access administration pages',
      'create forum content',
      'edit any forum content',
      'delete any forum content',
    ]);
    $this->editOwnTopicsUser = $this
      ->drupalCreateUser([
      'create forum content',
      'edit own forum content',
      'delete own forum content',
    ]);
    $this->webUser = $this
      ->drupalCreateUser();
    $this->postCommentUser = $this
      ->drupalCreateUser([
      'administer content types',
      'create forum content',
      'post comments',
      'skip comment approval',
      'access comments',
    ]);
    $this
      ->drupalPlaceBlock('help_block', [
      'region' => 'help',
    ]);
    $this
      ->drupalPlaceBlock('local_actions_block');
  }

  /**
   * Tests forum functionality through the admin and user interfaces.
   */
  public function testForum() {

    // Check that the basic forum install creates a default forum topic
    $this
      ->drupalGet('/forum');

    // Look for the "General discussion" default forum
    $this
      ->assertRaw(Link::createFromRoute(t('General discussion'), 'forum.page', [
      'taxonomy_term' => 1,
    ])
      ->toString(), "Found the default forum at the /forum listing");

    // Check the presence of expected cache tags.
    $this
      ->assertCacheTag('config:forum.settings');
    $this
      ->drupalGet(Url::fromRoute('forum.page', [
      'taxonomy_term' => 1,
    ]));
    $this
      ->assertCacheTag('config:forum.settings');

    // Do the admin tests.
    $this
      ->doAdminTests($this->adminUser);

    // Check display order.
    $display = EntityViewDisplay::load('node.forum.default');
    $body = $display
      ->getComponent('body');
    $comment = $display
      ->getComponent('comment_forum');
    $taxonomy = $display
      ->getComponent('taxonomy_forums');

    // Assert field order is body » taxonomy » comments.
    $this
      ->assertTrue($taxonomy['weight'] < $body['weight']);
    $this
      ->assertTrue($body['weight'] < $comment['weight']);

    // Check form order.
    $display = EntityFormDisplay::load('node.forum.default');
    $body = $display
      ->getComponent('body');
    $comment = $display
      ->getComponent('comment_forum');
    $taxonomy = $display
      ->getComponent('taxonomy_forums');

    // Assert category comes before body in order.
    $this
      ->assertTrue($taxonomy['weight'] < $body['weight']);
    $this
      ->generateForumTopics();

    // Log in an unprivileged user to view the forum topics and generate an
    // active forum topics list.
    $this
      ->drupalLogin($this->webUser);

    // Verify that this user is shown a message that they may not post content.
    $this
      ->drupalGet('forum/' . $this->forum['tid']);
    $this
      ->assertText(t('You are not allowed to post new content in the forum'), "Authenticated user without permission to post forum content is shown message in local tasks to that effect.");

    // Log in, and do basic tests for a user with permission to edit any forum
    // content.
    $this
      ->doBasicTests($this->editAnyTopicsUser, TRUE);

    // Create a forum node authored by this user.
    $any_topics_user_node = $this
      ->createForumTopic($this->forum, FALSE);

    // Log in, and do basic tests for a user with permission to edit only its
    // own forum content.
    $this
      ->doBasicTests($this->editOwnTopicsUser, FALSE);

    // Create a forum node authored by this user.
    $own_topics_user_node = $this
      ->createForumTopic($this->forum, FALSE);

    // Verify that this user cannot edit forum content authored by another user.
    $this
      ->verifyForums($any_topics_user_node, FALSE, 403);

    // Verify that this user is shown a local task to add new forum content.
    $this
      ->drupalGet('forum');
    $this
      ->assertSession()
      ->linkExists(t('Add new Forum topic'));
    $this
      ->drupalGet('forum/' . $this->forum['tid']);
    $this
      ->assertSession()
      ->linkExists(t('Add new Forum topic'));

    // Log in a user with permission to edit any forum content.
    $this
      ->drupalLogin($this->editAnyTopicsUser);

    // Verify that this user can edit forum content authored by another user.
    $this
      ->verifyForums($own_topics_user_node, TRUE);

    // Verify the topic and post counts on the forum page.
    $this
      ->drupalGet('forum');

    // Verify row for testing forum.
    $forum_arg = [
      ':forum' => 'forum-list-' . $this->forum['tid'],
    ];

    // Topics cell contains number of topics and number of unread topics.
    $xpath = $this
      ->buildXPathQuery('//tr[@id=:forum]//td[@class="forum__topics"]', $forum_arg);
    $topics = $this
      ->xpath($xpath);
    $topics = trim($topics[0]
      ->getText());

    // The extracted text contains the number of topics (6) and new posts
    // (also 6) in this table cell.
    $this
      ->assertEquals('6 6 new posts in forum ' . $this->forum['name'], $topics, 'Number of topics found.');

    // Verify the number of unread topics.
    $elements = $this
      ->xpath('//tr[@id=:forum]//td[@class="forum__topics"]//a', $forum_arg);
    $this
      ->assertStringStartsWith('6 new posts', $elements[0]
      ->getText(), 'Number of unread topics found.');

    // Verify that the forum name is in the unread topics text.
    $elements = $this
      ->xpath('//tr[@id=:forum]//em[@class="placeholder"]', $forum_arg);
    $this
      ->assertStringContainsString($this->forum['name'], $elements[0]
      ->getText(), 'Forum name found in unread topics text.');

    // Verify total number of posts in forum.
    $elements = $this
      ->xpath('//tr[@id=:forum]//td[@class="forum__posts"]', $forum_arg);
    $this
      ->assertEquals('6', $elements[0]
      ->getText(), 'Number of posts found.');

    // Test loading multiple forum nodes on the front page.
    $this
      ->drupalLogin($this
      ->drupalCreateUser([
      'administer content types',
      'create forum content',
      'post comments',
    ]));
    $this
      ->drupalPostForm('admin/structure/types/manage/forum', [
      'options[promote]' => 'promote',
    ], t('Save content type'));
    $this
      ->createForumTopic($this->forum, FALSE);
    $this
      ->createForumTopic($this->forum, FALSE);
    $this
      ->drupalGet('node');

    // Test adding a comment to a forum topic.
    $node = $this
      ->createForumTopic($this->forum, FALSE);
    $edit = [];
    $edit['comment_body[0][value]'] = $this
      ->randomMachineName();
    $this
      ->drupalPostForm('node/' . $node
      ->id(), $edit, t('Save'));
    $this
      ->assertSession()
      ->statusCodeEquals(200);

    // Test editing a forum topic that has a comment.
    $this
      ->drupalLogin($this->editAnyTopicsUser);
    $this
      ->drupalGet('forum/' . $this->forum['tid']);
    $this
      ->drupalPostForm('node/' . $node
      ->id() . '/edit', [], t('Save'));
    $this
      ->assertSession()
      ->statusCodeEquals(200);

    // Test the root forum page title change.
    $this
      ->drupalGet('forum');
    $this
      ->assertCacheTag('config:taxonomy.vocabulary.' . $this->forum['vid']);
    $this
      ->assertTitle('Forums | Drupal');
    $vocabulary = Vocabulary::load($this->forum['vid']);
    $vocabulary
      ->set('name', 'Discussions');
    $vocabulary
      ->save();
    $this
      ->drupalGet('forum');
    $this
      ->assertTitle('Discussions | Drupal');

    // Test anonymous action link.
    $this
      ->drupalLogout();
    $this
      ->drupalGet('forum/' . $this->forum['tid']);
    $this
      ->assertSession()
      ->linkExists(t('Log in to post new content in the forum.'));
  }

  /**
   * Tests that forum nodes can't be added without a parent.
   *
   * Verifies that forum nodes are not created without choosing "forum" from the
   * select list.
   */
  public function testAddOrphanTopic() {

    // Must remove forum topics to test creating orphan topics.
    $vid = $this
      ->config('forum.settings')
      ->get('vocabulary');
    $tids = \Drupal::entityQuery('taxonomy_term')
      ->condition('vid', $vid)
      ->execute();
    $term_storage = \Drupal::entityTypeManager()
      ->getStorage('taxonomy_term');
    $terms = $term_storage
      ->loadMultiple($tids);
    $term_storage
      ->delete($terms);

    // Create an orphan forum item.
    $edit = [];
    $edit['title[0][value]'] = $this
      ->randomMachineName(10);
    $edit['body[0][value]'] = $this
      ->randomMachineName(120);
    $this
      ->drupalLogin($this->adminUser);
    $this
      ->drupalPostForm('node/add/forum', $edit, t('Save'));
    $nid_count = $this->container
      ->get('entity_type.manager')
      ->getStorage('node')
      ->getQuery()
      ->accessCheck(FALSE)
      ->count()
      ->execute();
    $this
      ->assertEqual(0, $nid_count, 'A forum node was not created when missing a forum vocabulary.');

    // Reset the defaults for future tests.
    \Drupal::service('module_installer')
      ->install([
      'forum',
    ]);
  }

  /**
   * Runs admin tests on the admin user.
   *
   * @param object $user
   *   The logged-in user.
   */
  private function doAdminTests($user) {

    // Log in the user.
    $this
      ->drupalLogin($user);

    // Add forum to the Tools menu.
    $edit = [];
    $this
      ->drupalPostForm('admin/structure/menu/manage/tools', $edit, t('Save'));
    $this
      ->assertSession()
      ->statusCodeEquals(200);

    // Edit forum taxonomy.
    // Restoration of the settings fails and causes subsequent tests to fail.
    $this
      ->editForumVocabulary();

    // Create forum container.
    $this->forumContainer = $this
      ->createForum('container');

    // Verify "edit container" link exists and functions correctly.
    $this
      ->drupalGet('admin/structure/forum');

    // Verify help text is shown.
    $this
      ->assertText(t('Forums contain forum topics. Use containers to group related forums'));

    // Verify action links are there.
    $this
      ->assertSession()
      ->linkExists('Add forum');
    $this
      ->assertSession()
      ->linkExists('Add container');
    $this
      ->clickLink('edit container');
    $this
      ->assertRaw('Edit container', 'Followed the link to edit the container');

    // Create forum inside the forum container.
    $this->forum = $this
      ->createForum('forum', $this->forumContainer['tid']);

    // Verify the "edit forum" link exists and functions correctly.
    $this
      ->drupalGet('admin/structure/forum');
    $this
      ->clickLink('edit forum');
    $this
      ->assertRaw('Edit forum', 'Followed the link to edit the forum');

    // Navigate back to forum structure page.
    $this
      ->drupalGet('admin/structure/forum');

    // Create second forum in container, destined to be deleted below.
    $delete_forum = $this
      ->createForum('forum', $this->forumContainer['tid']);

    // Save forum overview.
    $this
      ->drupalPostForm('admin/structure/forum/', [], t('Save'));
    $this
      ->assertRaw(t('The configuration options have been saved.'));

    // Delete this second forum.
    $this
      ->deleteForum($delete_forum['tid']);

    // Create forum at the top (root) level.
    $this->rootForum = $this
      ->createForum('forum');

    // Test vocabulary form alterations.
    $this
      ->drupalGet('admin/structure/taxonomy/manage/forums');
    $this
      ->assertSession()
      ->buttonExists('Save');
    $this
      ->assertSession()
      ->buttonNotExists('Delete');

    // Test term edit form alterations.
    $this
      ->drupalGet('taxonomy/term/' . $this->forumContainer['tid'] . '/edit');

    // Test parent field been hidden by forum module.
    $this
      ->assertNoField('parent[]', 'Parent field not found.');

    // Create a default vocabulary named "Tags".
    $description = 'Use tags to group articles on similar topics into categories.';
    $help = 'Enter a comma-separated list of words to describe your content.';
    $vocabulary = Vocabulary::create([
      'name' => 'Tags',
      'description' => $description,
      'vid' => 'tags',
      'langcode' => \Drupal::languageManager()
        ->getDefaultLanguage()
        ->getId(),
      'help' => $help,
    ]);
    $vocabulary
      ->save();

    // Test tags vocabulary form is not affected.
    $this
      ->drupalGet('admin/structure/taxonomy/manage/tags');
    $this
      ->assertSession()
      ->buttonExists('Save');
    $this
      ->assertSession()
      ->linkExists(t('Delete'));

    // Test tags vocabulary term form is not affected.
    $this
      ->drupalGet('admin/structure/taxonomy/manage/tags/add');
    $this
      ->assertField('parent[]', 'Parent field found.');

    // Test relations widget exists.
    $relations_widget = $this
      ->xpath("//details[@id='edit-relations']");
    $this
      ->assertTrue(isset($relations_widget[0]), 'Relations widget element found.');
  }

  /**
   * Edits the forum taxonomy.
   */
  public function editForumVocabulary() {

    // Backup forum taxonomy.
    $vid = $this
      ->config('forum.settings')
      ->get('vocabulary');
    $original_vocabulary = Vocabulary::load($vid);

    // Generate a random name and description.
    $edit = [
      'name' => $this
        ->randomMachineName(10),
      'description' => $this
        ->randomMachineName(100),
    ];

    // Edit the vocabulary.
    $this
      ->drupalPostForm('admin/structure/taxonomy/manage/' . $original_vocabulary
      ->id(), $edit, t('Save'));
    $this
      ->assertSession()
      ->statusCodeEquals(200);
    $this
      ->assertRaw(t('Updated vocabulary %name.', [
      '%name' => $edit['name'],
    ]), 'Vocabulary was edited');

    // Grab the newly edited vocabulary.
    $current_vocabulary = Vocabulary::load($vid);

    // Make sure we actually edited the vocabulary properly.
    $this
      ->assertEqual($current_vocabulary
      ->label(), $edit['name'], 'The name was updated');
    $this
      ->assertEqual($current_vocabulary
      ->getDescription(), $edit['description'], 'The description was updated');

    // Restore the original vocabulary's name and description.
    $current_vocabulary
      ->set('name', $original_vocabulary
      ->label());
    $current_vocabulary
      ->set('description', $original_vocabulary
      ->getDescription());
    $current_vocabulary
      ->save();

    // Reload vocabulary to make sure changes are saved.
    $current_vocabulary = Vocabulary::load($vid);
    $this
      ->assertEqual($current_vocabulary
      ->label(), $original_vocabulary
      ->label(), 'The original vocabulary settings were restored');
  }

  /**
   * Creates a forum container or a forum.
   *
   * @param string $type
   *   The forum type (forum container or forum).
   * @param int $parent
   *   The forum parent. This defaults to 0, indicating a root forum.
   *
   * @return \Drupal\Core\Database\StatementInterface
   *   The created taxonomy term data.
   */
  public function createForum($type, $parent = 0) {

    // Generate a random name/description.
    $name = $this
      ->randomMachineName(10);
    $description = $this
      ->randomMachineName(100);
    $edit = [
      'name[0][value]' => $name,
      'description[0][value]' => $description,
      'parent[0]' => $parent,
      'weight' => '0',
    ];

    // Create forum.
    $this
      ->drupalPostForm('admin/structure/forum/add/' . $type, $edit, t('Save'));
    $this
      ->assertSession()
      ->statusCodeEquals(200);
    $type = $type == 'container' ? 'forum container' : 'forum';
    $this
      ->assertText(t('Created new @type @term.', [
      '@term' => $name,
      '@type' => t($type),
    ]), new FormattableMarkup('@type was created', [
      '@type' => ucfirst($type),
    ]));

    // Verify that the creation message contains a link to a term.
    $view_link = $this
      ->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [
      ':href' => 'term/',
    ]);
    $this
      ->assert(isset($view_link), 'The message area contains a link to a term');

    /** @var \Drupal\taxonomy\TermStorageInterface $taxonomy_term_storage */
    $taxonomy_term_storage = $this->container
      ->get('entity_type.manager')
      ->getStorage('taxonomy_term');

    // Verify forum.
    $term = $taxonomy_term_storage
      ->loadByProperties([
      'vid' => $this
        ->config('forum.settings')
        ->get('vocabulary'),
      'name' => $name,
      'description__value' => $description,
    ]);
    $term = array_shift($term);
    $this
      ->assertTrue(!empty($term), 'The ' . $type . ' exists in the database');

    // Verify forum hierarchy.
    $tid = $term
      ->id();
    $parent_tid = $taxonomy_term_storage
      ->loadParents($tid);
    $parent_tid = empty($parent_tid) ? 0 : array_shift($parent_tid)
      ->id();
    $this
      ->assertTrue($parent == $parent_tid, 'The ' . $type . ' is linked to its container');
    $forum = $taxonomy_term_storage
      ->load($tid);
    $this
      ->assertEqual($type == 'forum container', (bool) $forum->forum_container->value);
    return [
      'tid' => $tid,
      'name' => $term
        ->getName(),
      'vid' => $term
        ->bundle(),
    ];
  }

  /**
   * Deletes a forum.
   *
   * @param int $tid
   *   The forum ID.
   */
  public function deleteForum($tid) {

    // Delete the forum.
    $this
      ->drupalGet('admin/structure/forum/edit/forum/' . $tid);
    $this
      ->clickLink(t('Delete'));
    $this
      ->assertText('Are you sure you want to delete the forum');
    $this
      ->assertNoText('Add forum');
    $this
      ->assertNoText('Add forum container');
    $this
      ->drupalPostForm(NULL, [], t('Delete'));

    // Assert that the forum no longer exists.
    $this
      ->drupalGet('forum/' . $tid);
    $this
      ->assertSession()
      ->statusCodeEquals(404);
  }

  /**
   * Runs basic tests on the indicated user.
   *
   * @param \Drupal\Core\Session\AccountInterface $user
   *   The logged in user.
   * @param bool $admin
   *   User has 'access administration pages' privilege.
   */
  private function doBasicTests($user, $admin) {

    // Log in the user.
    $this
      ->drupalLogin($user);

    // Attempt to create forum topic under a container.
    $this
      ->createForumTopic($this->forumContainer, TRUE);

    // Create forum node.
    $node = $this
      ->createForumTopic($this->forum, FALSE);

    // Verify the user has access to all the forum nodes.
    $this
      ->verifyForums($node, $admin);
  }

  /**
   * Tests a forum with a new post displays properly.
   */
  public function testForumWithNewPost() {

    // Log in as the first user.
    $this
      ->drupalLogin($this->adminUser);

    // Create a forum container.
    $this->forumContainer = $this
      ->createForum('container');

    // Create a forum.
    $this->forum = $this
      ->createForum('forum');

    // Create a topic.
    $node = $this
      ->createForumTopic($this->forum, FALSE);

    // Log in as a second user.
    $this
      ->drupalLogin($this->postCommentUser);

    // Post a reply to the topic.
    $edit = [];
    $edit['subject[0][value]'] = $this
      ->randomMachineName();
    $edit['comment_body[0][value]'] = $this
      ->randomMachineName();
    $this
      ->drupalPostForm('node/' . $node
      ->id(), $edit, t('Save'));
    $this
      ->assertSession()
      ->statusCodeEquals(200);

    // Test replying to a comment.
    $this
      ->clickLink('Reply');
    $this
      ->assertSession()
      ->statusCodeEquals(200);
    $this
      ->assertFieldByName('comment_body[0][value]');

    // Log in as the first user.
    $this
      ->drupalLogin($this->adminUser);

    // Check that forum renders properly.
    $this
      ->drupalGet("forum/{$this->forum['tid']}");
    $this
      ->assertSession()
      ->statusCodeEquals(200);

    // Verify there is no unintentional HTML tag escaping.
    $this
      ->assertNoEscaped('<');
  }

  /**
   * Creates a forum topic.
   *
   * @param array $forum
   *   A forum array.
   * @param bool $container
   *   TRUE if $forum is a container; FALSE otherwise.
   *
   * @return object|null
   *   The created topic node or NULL if the forum is a container.
   */
  public function createForumTopic($forum, $container = FALSE) {

    // Generate a random subject/body.
    $title = $this
      ->randomMachineName(20);
    $body = $this
      ->randomMachineName(200);
    $edit = [
      'title[0][value]' => $title,
      'body[0][value]' => $body,
    ];
    $tid = $forum['tid'];

    // Create the forum topic, preselecting the forum ID via a URL parameter.
    $this
      ->drupalPostForm('node/add/forum', $edit, t('Save'), [
      'query' => [
        'forum_id' => $tid,
      ],
    ]);
    $type = t('Forum topic');
    if ($container) {
      $this
        ->assertNoText(t('@type @title has been created.', [
        '@type' => $type,
        '@title' => $title,
      ]), 'Forum topic was not created');
      $this
        ->assertRaw(t('The item %title is a forum container, not a forum.', [
        '%title' => $forum['name'],
      ]), 'Error message was shown');
      return;
    }
    else {
      $this
        ->assertText(t('@type @title has been created.', [
        '@type' => $type,
        '@title' => $title,
      ]), 'Forum topic was created');
      $this
        ->assertNoRaw(t('The item %title is a forum container, not a forum.', [
        '%title' => $forum['name'],
      ]), 'No error message was shown');

      // Verify that the creation message contains a link to a term.
      $view_link = $this
        ->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [
        ':href' => 'term/',
      ]);
      $this
        ->assert(isset($view_link), 'The message area contains a link to a term');
    }

    // Retrieve node object, ensure that the topic was created and in the proper forum.
    $node = $this
      ->drupalGetNodeByTitle($title);
    $this
      ->assertTrue($node != NULL, new FormattableMarkup('Node @title was loaded', [
      '@title' => $title,
    ]));
    $this
      ->assertEqual($node->taxonomy_forums->target_id, $tid, 'Saved forum topic was in the expected forum');

    // View forum topic.
    $this
      ->drupalGet('node/' . $node
      ->id());
    $this
      ->assertRaw($title, 'Subject was found');
    $this
      ->assertRaw($body, 'Body was found');
    return $node;
  }

  /**
   * Verifies that the logged in user has access to a forum node.
   *
   * @param \Drupal\Core\Entity\EntityInterface $node
   *   The node being checked.
   * @param bool $admin
   *   Boolean to indicate whether the user can 'access administration pages'.
   * @param int $response
   *   The expected HTTP response code.
   */
  private function verifyForums(EntityInterface $node, $admin, $response = 200) {
    $response2 = $admin ? 200 : 403;

    // View forum help node.
    $this
      ->drupalGet('admin/help/forum');
    $this
      ->assertSession()
      ->statusCodeEquals($response2);
    if ($response2 == 200) {
      $this
        ->assertTitle('Forum | Drupal');
      $this
        ->assertText(t('Forum'), 'Forum help node was displayed');
    }

    // View forum container page.
    $this
      ->verifyForumView($this->forumContainer);

    // View forum page.
    $this
      ->verifyForumView($this->forum, $this->forumContainer);

    // View root forum page.
    $this
      ->verifyForumView($this->rootForum);

    // View forum node.
    $this
      ->drupalGet('node/' . $node
      ->id());
    $this
      ->assertSession()
      ->statusCodeEquals(200);
    $this
      ->assertTitle($node
      ->label() . ' | Drupal');
    $breadcrumb_build = [
      Link::createFromRoute(t('Home'), '<front>'),
      Link::createFromRoute(t('Forums'), 'forum.index'),
      Link::createFromRoute($this->forumContainer['name'], 'forum.page', [
        'taxonomy_term' => $this->forumContainer['tid'],
      ]),
      Link::createFromRoute($this->forum['name'], 'forum.page', [
        'taxonomy_term' => $this->forum['tid'],
      ]),
    ];
    $breadcrumb = [
      '#theme' => 'breadcrumb',
      '#links' => $breadcrumb_build,
    ];
    $this
      ->assertRaw(\Drupal::service('renderer')
      ->renderRoot($breadcrumb), 'Breadcrumbs were displayed');

    // View forum edit node.
    $this
      ->drupalGet('node/' . $node
      ->id() . '/edit');
    $this
      ->assertSession()
      ->statusCodeEquals($response);
    if ($response == 200) {
      $this
        ->assertTitle('Edit Forum topic ' . $node
        ->label() . ' | Drupal');
    }
    if ($response == 200) {

      // Edit forum node (including moving it to another forum).
      $edit = [];
      $edit['title[0][value]'] = 'node/' . $node
        ->id();
      $edit['body[0][value]'] = $this
        ->randomMachineName(256);

      // Assume the topic is initially associated with $forum.
      $edit['taxonomy_forums'] = $this->rootForum['tid'];
      $edit['shadow'] = TRUE;
      $this
        ->drupalPostForm('node/' . $node
        ->id() . '/edit', $edit, t('Save'));
      $this
        ->assertText(t('Forum topic @title has been updated.', [
        '@title' => $edit['title[0][value]'],
      ]), 'Forum node was edited');

      // Verify topic was moved to a different forum.
      $forum_tid = $this->container
        ->get('database')
        ->select('forum', 'f')
        ->fields('f', [
        'tid',
      ])
        ->condition('nid', $node
        ->id())
        ->condition('vid', $node
        ->getRevisionId())
        ->execute()
        ->fetchField();
      $this
        ->assertTrue($forum_tid == $this->rootForum['tid'], 'The forum topic is linked to a different forum');

      // Delete forum node.
      $this
        ->drupalPostForm('node/' . $node
        ->id() . '/delete', [], t('Delete'));
      $this
        ->assertSession()
        ->statusCodeEquals($response);
      $this
        ->assertRaw(t('Forum topic %title has been deleted.', [
        '%title' => $edit['title[0][value]'],
      ]), 'Forum node was deleted');
    }
  }

  /**
   * Verifies the display of a forum page.
   *
   * @param array $forum
   *   A row from the taxonomy_term_data table in an array.
   * @param array $parent
   *   (optional) An array representing the forum's parent.
   */
  private function verifyForumView($forum, $parent = NULL) {

    // View forum page.
    $this
      ->drupalGet('forum/' . $forum['tid']);
    $this
      ->assertSession()
      ->statusCodeEquals(200);
    $this
      ->assertTitle($forum['name'] . ' | Drupal');
    $breadcrumb_build = [
      Link::createFromRoute(t('Home'), '<front>'),
      Link::createFromRoute(t('Forums'), 'forum.index'),
    ];
    if (isset($parent)) {
      $breadcrumb_build[] = Link::createFromRoute($parent['name'], 'forum.page', [
        'taxonomy_term' => $parent['tid'],
      ]);
    }
    $breadcrumb = [
      '#theme' => 'breadcrumb',
      '#links' => $breadcrumb_build,
    ];
    $this
      ->assertRaw(\Drupal::service('renderer')
      ->renderRoot($breadcrumb), 'Breadcrumbs were displayed');
  }

  /**
   * Generates forum topics.
   */
  private function generateForumTopics() {
    $this->nids = [];
    for ($i = 0; $i < 5; $i++) {
      $node = $this
        ->createForumTopic($this->forum, FALSE);
      $this->nids[] = $node
        ->id();
    }
  }

}

Classes

Name	Description
ForumTest	Tests for forum.module.