class WhosOnlineBlockTest

class WhosOnlineBlockTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'user',
        'block',
        'views',
    ];
    
    /**
     * The block being tested.
     *
     * @var \Drupal\block\BlockInterface
     */
    protected $block;
    
    /**
     * The block storage.
     *
     * @var \Drupal\Core\Config\Entity\ConfigEntityStorageInterface
     */
    protected $controller;
    
    /**
     * The renderer.
     *
     * @var \Drupal\Core\Render\RendererInterface
     */
    protected $renderer;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installConfig([
            'system',
            'block',
            'views',
            'user',
        ]);
        $this->installSchema('system', [
            'sequences',
        ]);
        $this->installEntitySchema('user');
        $this->controller = $this->container
            ->get('entity_type.manager')
            ->getStorage('block');
        // Create a block with only required values.
        $this->block = $this->controller
            ->create([
            'plugin' => 'views_block:who_s_online-who_s_online_block',
            'region' => 'sidebar_first',
            'id' => 'views_block__who_s_online_who_s_online_block',
            'theme' => \Drupal::configFactory()->get('system.theme')
                ->get('default'),
            'label' => "Who's online",
            'visibility' => [],
            'weight' => 0,
        ]);
        $this->block
            ->save();
        $this->container
            ->get('cache.render')
            ->deleteAll();
        $this->renderer = $this->container
            ->get('renderer');
    }
    
    /**
     * Tests the Who's Online block.
     */
    public function testWhosOnlineBlock() {
        $request_time = \Drupal::time()->getRequestTime();
        // Generate users.
        $user1 = User::create([
            'name' => 'user1',
            'mail' => 'user1@example.com',
        ]);
        $user1->addRole('administrator');
        $user1->activate();
        $user1->setLastAccessTime($request_time);
        $user1->save();
        $user2 = User::create([
            'name' => 'user2',
            'mail' => 'user2@example.com',
        ]);
        $user2->activate();
        $user2->setLastAccessTime($request_time + 1);
        $user2->save();
        $user3 = User::create([
            'name' => 'user3',
            'mail' => 'user2@example.com',
        ]);
        $user3->activate();
        // Insert an inactive user who should not be seen in the block.
        $inactive_time = $request_time - 60 * 60;
        $user3->setLastAccessTime($inactive_time);
        $user3->save();
        // Test block output.
        \Drupal::currentUser()->setAccount($user1);
        // Test the rendering of a block.
        $entity = Block::load('views_block__who_s_online_who_s_online_block');
        $output = \Drupal::entityTypeManager()->getViewBuilder($entity->getEntityTypeId())
            ->view($entity, 'block');
        $this->setRawContent($this->renderer
            ->renderRoot($output));
        $this->assertRaw('2 users', 'Correct number of online users (2 users).');
        $this->assertText($user1->getAccountName(), 'Active user 1 found in online list.');
        $this->assertText($user2->getAccountName(), 'Active user 2 found in online list.');
        $this->assertNoText($user3->getAccountName(), 'Inactive user not found in online list.');
        // Verify that online users are ordered correctly.
        $this->assertGreaterThan(strpos($this->getRawContent(), $user2->getAccountName()), strpos($this->getRawContent(), $user1->getAccountName()));
    }

}