class ForumBlockTest

class ForumBlockTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'forum',
        'block',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * A user with various administrative privileges.
     */
    protected $adminUser;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create users.
        $this->adminUser = $this->drupalCreateUser([
            'access administration pages',
            'administer blocks',
            'administer nodes',
            'create forum content',
            'post comments',
            'skip comment approval',
        ]);
    }
    
    /**
     * Tests the "New forum topics" block.
     */
    public function testNewForumTopicsBlock() {
        $this->drupalLogin($this->adminUser);
        // Enable the new forum topics block.
        $block = $this->drupalPlaceBlock('forum_new_block');
        $this->drupalGet('');
        // Create 5 forum topics.
        $topics = $this->createForumTopics();
        $this->assertSession()
            ->linkExists('More', 0, 'New forum topics block has a "more"-link.');
        $this->assertSession()
            ->linkByHrefExists('forum', 0, 'New forum topics block has a "more"-link.');
        // We expect all 5 forum topics to appear in the "New forum topics" block.
        foreach ($topics as $topic) {
            $this->assertSession()
                ->linkExists($topic, 0, new FormattableMarkup('Forum topic @topic found in the "New forum topics" block.', [
                '@topic' => $topic,
            ]));
        }
        // Configure the new forum topics block to only show 2 topics.
        $block->getPlugin()
            ->setConfigurationValue('block_count', 2);
        $block->save();
        $this->drupalGet('');
        // We expect only the 2 most recent forum topics to appear in the "New forum
        // topics" block.
        for ($index = 0; $index < 5; $index++) {
            if (in_array($index, [
                3,
                4,
            ])) {
                $this->assertSession()
                    ->linkExists($topics[$index], 0, new FormattableMarkup('Forum topic @topic found in the "New forum topics" block.', [
                    '@topic' => $topics[$index],
                ]));
            }
            else {
                $this->assertSession()
                    ->pageTextNotContains($topics[$index]);
            }
        }
    }
    
    /**
     * Tests the "Active forum topics" block.
     */
    public function testActiveForumTopicsBlock() {
        $this->drupalLogin($this->adminUser);
        // Create 10 forum topics.
        $topics = $this->createForumTopics(10);
        // Comment on the first 5 topics.
        $date = new DrupalDateTime();
        for ($index = 0; $index < 5; $index++) {
            // Get the node from the topic title.
            $node = $this->drupalGetNodeByTitle($topics[$index]);
            $date->modify('+1 minute');
            $comment = Comment::create([
                'entity_id' => $node->id(),
                'field_name' => 'comment_forum',
                'entity_type' => 'node',
                'node_type' => 'node_type_' . $node->bundle(),
                'subject' => $this->randomString(20),
                'comment_body' => $this->randomString(256),
                'created' => $date->getTimestamp(),
            ]);
            $comment->save();
        }
        // Enable the block.
        $block = $this->drupalPlaceBlock('forum_active_block');
        $this->drupalGet('');
        $this->assertSession()
            ->linkExists('More', 0, 'Active forum topics block has a "more"-link.');
        $this->assertSession()
            ->linkByHrefExists('forum', 0, 'Active forum topics block has a "more"-link.');
        // We expect the first 5 forum topics to appear in the "Active forum topics"
        // block.
        $this->drupalGet('<front>');
        for ($index = 0; $index < 10; $index++) {
            if ($index < 5) {
                $this->assertSession()
                    ->linkExists($topics[$index], 0, new FormattableMarkup('Forum topic @topic found in the "Active forum topics" block.', [
                    '@topic' => $topics[$index],
                ]));
            }
            else {
                $this->assertSession()
                    ->pageTextNotContains($topics[$index]);
            }
        }
        // Configure the active forum block to only show 2 topics.
        $block->getPlugin()
            ->setConfigurationValue('block_count', 2);
        $block->save();
        $this->drupalGet('');
        // We expect only the 2 forum topics with most recent comments to appear in
        // the "Active forum topics" block.
        for ($index = 0; $index < 10; $index++) {
            if (in_array($index, [
                3,
                4,
            ])) {
                $this->assertSession()
                    ->linkExists($topics[$index], 0, 'Forum topic found in the "Active forum topics" block.');
            }
            else {
                $this->assertSession()
                    ->pageTextNotContains($topics[$index]);
            }
        }
    }
    
    /**
     * Creates a forum topic.
     *
     * @return string
     *   The title of the newly generated topic.
     */
    protected function createForumTopics($count = 5) {
        $topics = [];
        $date = new DrupalDateTime();
        $date->modify('-24 hours');
        for ($index = 0; $index < $count; $index++) {
            // Generate a random subject/body.
            $title = $this->randomMachineName(20);
            $body = $this->randomMachineName(200);
            // Forum posts are ordered by timestamp, so force a unique timestamp by
            // changing the date.
            $date->modify('+1 minute');
            $edit = [
                'title[0][value]' => $title,
                'body[0][value]' => $body,
                // Forum posts are ordered by timestamp, so force a unique timestamp by
                // adding the index.
'created[0][value][date]' => $date->format('Y-m-d'),
                'created[0][value][time]' => $date->format('H:i:s'),
            ];
            // Create the forum topic, preselecting the forum ID via a URL parameter.
            $this->drupalGet('node/add/forum', [
                'query' => [
                    'forum_id' => 1,
                ],
            ]);
            $this->submitForm($edit, 'Save');
            $topics[] = $title;
        }
        return $topics;
    }

}