class AdminTest

class AdminTest extends BrowserTestBase {
    
    /**
     * User account with all available permissions.
     *
     * @var \Drupal\Core\Session\AccountInterface
     */
    protected $adminUser;
    
    /**
     * User account with limited access to administration pages.
     *
     * @var \Drupal\Core\Session\AccountInterface
     */
    protected $webUser;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'locale',
        'menu_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        // testAdminPages() requires Locale module.
        parent::setUp();
        // Create an administrator with all permissions, as well as a regular user
        // who can only access administration pages and perform some Locale module
        // administrative tasks, but not all of them.
        $this->adminUser = $this->drupalCreateUser(array_keys(\Drupal::service('user.permissions')->getPermissions()));
        $this->webUser = $this->drupalCreateUser([
            'access administration pages',
            'translate interface',
        ]);
        $this->drupalLogin($this->adminUser);
    }
    
    /**
     * Tests output on administrative listing pages.
     */
    public function testAdminPages() : void {
        // Go to Administration.
        $this->drupalGet('admin');
        // Verify that all visible, top-level administration links are listed on
        // the main administration page.
        foreach ($this->getTopLevelMenuLinks() as $element) {
            $item = $element->link;
            if (!$element->access
                ->isAllowed()) {
                // If the link is not accessible, it should not be rendered.
                // @see \Drupal\Core\Menu\MenuLinkTree::buildItems().
                $this->assertSession()
                    ->linkNotExists($item->getTitle());
                continue;
            }
            $this->assertSession()
                ->linkExists($item->getTitle());
            $this->assertSession()
                ->linkByHrefExists($item->getUrlObject()
                ->toString());
            // The description should appear below the link.
            $this->assertSession()
                ->pageTextContains($item->getDescription());
        }
        // For each administrative listing page on which the Locale module appears,
        // verify that there are links to the module's primary configuration pages,
        // but no links to its individual sub-configuration pages. Also verify that
        // a user with access to only some Locale module administration pages only
        // sees links to the pages they have access to.
        $admin_list_pages = [
            'admin/index',
            'admin/config',
            'admin/config/regional',
        ];
        foreach ($admin_list_pages as $page) {
            // For the administrator, verify that there are links to Locale's primary
            // configuration pages, but no links to individual sub-configuration
            // pages.
            $this->drupalLogin($this->adminUser);
            $this->drupalGet($page);
            $this->assertSession()
                ->linkByHrefExists('admin/config');
            $this->assertSession()
                ->linkByHrefExists('admin/config/regional/settings');
            $this->assertSession()
                ->linkByHrefExists('admin/config/regional/date-time');
            $this->assertSession()
                ->linkByHrefExists('admin/config/regional/language');
            $this->assertSession()
                ->linkByHrefNotExists('admin/config/regional/language/detection/session');
            $this->assertSession()
                ->linkByHrefNotExists('admin/config/regional/language/detection/url');
            $this->assertSession()
                ->linkByHrefExists('admin/config/regional/translate');
            // On admin/index only, the administrator should also see a "Configure
            // permissions" link for the Locale module.
            if ($page == 'admin/index') {
                $this->assertSession()
                    ->linkByHrefExists("admin/people/permissions/module/locale");
            }
            // For a less privileged user, verify that there are no links to Locale's
            // primary configuration pages, but a link to the translate page exists.
            $this->drupalLogin($this->webUser);
            $this->drupalGet($page);
            $this->assertSession()
                ->linkByHrefExists('admin/config');
            $this->assertSession()
                ->linkByHrefNotExists('admin/config/regional/settings');
            $this->assertSession()
                ->linkByHrefNotExists('admin/config/regional/date-time');
            $this->assertSession()
                ->linkByHrefNotExists('admin/config/regional/language');
            $this->assertSession()
                ->linkByHrefNotExists('admin/config/regional/language/detection/session');
            $this->assertSession()
                ->linkByHrefNotExists('admin/config/regional/language/detection/url');
            $this->assertSession()
                ->linkByHrefExists('admin/config/regional/translate');
            // This user cannot configure permissions, so even on admin/index should
            // not see a "Configure permissions" link for the Locale module.
            if ($page == 'admin/index') {
                $this->assertSession()
                    ->linkByHrefNotExists("admin/people/permissions#module-locale");
            }
        }
    }
    
    /**
     * Returns all top level menu links.
     *
     * @return \Drupal\Core\Menu\MenuLinkTreeElement[]
     */
    protected function getTopLevelMenuLinks() {
        $menu_tree = \Drupal::menuTree();
        // The system.admin link is normally the parent of all top-level admin links.
        $parameters = new MenuTreeParameters();
        $parameters->setRoot('system.admin')
            ->excludeRoot()
            ->setTopLevelOnly()
            ->onlyEnabledLinks();
        $tree = $menu_tree->load(NULL, $parameters);
        $manipulators = [
            [
                'callable' => 'menu.default_tree_manipulators:checkAccess',
            ],
            [
                'callable' => 'menu.default_tree_manipulators:flatten',
            ],
        ];
        return $menu_tree->transform($tree, $manipulators);
    }
    
    /**
     * Tests compact mode.
     */
    public function testCompactMode() : void {
        $session = $this->getSession();
        // The front page defaults to 'user/login', which redirects to 'user/{user}'
        // for authenticated users. We cannot use '<front>', since this does not
        // match the redirected URL.
        $frontpage_url = 'user/' . $this->adminUser
            ->id();
        $this->drupalGet('admin/compact/on');
        $this->assertSession()
            ->statusCodeEquals(200);
        // Verify that the user is redirected to the front page after turning on
        // compact mode.
        $this->assertSession()
            ->addressEquals($frontpage_url);
        $this->assertEquals('1', $session->getCookie('Drupal.visitor.admin_compact_mode'), 'Compact mode turns on.');
        $this->drupalGet('admin/compact/on');
        $this->assertEquals('1', $session->getCookie('Drupal.visitor.admin_compact_mode'), 'Compact mode remains on after a repeat call.');
        $this->drupalGet('');
        $this->assertEquals('1', $session->getCookie('Drupal.visitor.admin_compact_mode'), 'Compact mode persists on new requests.');
        $this->drupalGet('admin/compact/off');
        $this->assertSession()
            ->statusCodeEquals(200);
        // Verify that the user is redirected to the front page after turning off
        // compact mode.
        $this->assertSession()
            ->addressEquals($frontpage_url);
        $this->assertNull($session->getCookie('Drupal.visitor.admin_compact_mode'), 'Compact mode turns off.');
        $this->drupalGet('admin/compact/off');
        $this->assertNull($session->getCookie('Drupal.visitor.admin_compact_mode'), 'Compact mode remains off after a repeat call.');
        $this->drupalGet('');
        $this->assertNull($session->getCookie('Drupal.visitor.admin_compact_mode'), 'Compact mode persists off new requests.');
    }
    
    /**
     * Tests admin config page blocks without descriptions.
     */
    public function testConfigBlocksDescription() : void {
        // Go to Config administration page.
        $this->drupalGet('admin/config');
        $this->assertSession()
            ->statusCodeEquals(200);
        // Validates the content block without description.
        $this->assertSession()
            ->pageTextContains('Test custom admin block without description');
        // Validates an empty description block.
        $this->assertSession()
            ->elementNotExists('xpath', '//dd[@class="list-group__description"][not(text())]');
    }

}