class NavigationSafeBlockDefinitionTest

class NavigationSafeBlockDefinitionTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'navigation',
        'navigation_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * User with permission to administer navigation blocks and access navigation.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $adminUser;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create an admin user, log in and enable test navigation blocks.
        $this->adminUser = $this->drupalCreateUser([
            'configure navigation layout',
            'access navigation',
        ]);
        $this->drupalLogin($this->adminUser);
    }
    
    /**
     * Tests logic to include blocks in Navigation Layout UI.
     */
    public function testNavigationSafeBlockDefinition() : void {
        // Confirm that default blocks are available.
        $layout_url = '/admin/config/user-interface/navigation-block';
        $this->drupalGet($layout_url);
        $this->clickLink('Add block');
        $this->assertSession()
            ->linkExists('Administration');
        $this->assertSession()
            ->linkExists('Content');
        $this->assertSession()
            ->linkExists('Footer');
        $this->assertSession()
            ->linkExists('Navigation Shortcuts');
        $this->assertSession()
            ->linkExists('User');
        $this->assertSession()
            ->linkNotExists('Link');
        // Apply changes, clear cache and confirm that changes are applied.
        \Drupal::state()->set('navigation_safe_alter', TRUE);
        \Drupal::cache('discovery')->delete('block_plugins');
        $this->drupalGet($this->getUrl());
        $this->assertSession()
            ->linkExists('Administration');
        $this->assertSession()
            ->linkExists('Content');
        $this->assertSession()
            ->linkExists('Footer');
        $this->assertSession()
            ->linkExists('Link');
        $this->assertSession()
            ->linkNotExists('Navigation Shortcuts');
    }

}