setUpFilesystem example

  protected $layoutPluginManager;

  /** * {@inheritdoc} */
  protected function setUp(): void {
    parent::setUp();

    $this->setUpFilesystem();

    $container = new ContainerBuilder();
    $container->set('string_translation', $this->getStringTranslationStub());
    \Drupal::setContainer($container);

    $this->moduleHandler = $this->prophesize(ModuleHandlerInterface::class);

    $this->moduleHandler->moduleExists('module_a')->willReturn(TRUE);
    $this->moduleHandler->moduleExists('theme_a')->willReturn(FALSE);
    $this->moduleHandler->moduleExists('core')->willReturn(FALSE);
    $this->moduleHandler->moduleExists('invalid_provider')->willReturn(FALSE);

    

drupal_valid_test_ua($this->databasePrefix);

    $settings = [
      'hash_salt' => static::class,
      'file_public_path' => $this->siteDirectory . '/files',
      // Disable Twig template caching/dumping.       'twig_cache' => FALSE,
      // @see \Drupal\KernelTests\KernelTestBase::register()     ];
    new Settings($settings);

    $this->setUpFilesystem();

    foreach (Database::getAllConnectionInfo() as $key => $targets) {
      Database::removeConnection($key);
    }
    Database::addConnectionInfo('default', 'default', $this->getDatabaseConnectionInfo()['default']);
  }

  /** * Sets up the filesystem, so things like the file directory. */
  protected function setUpFilesystem() {
    

public function register(ContainerBuilder $container) {
    parent::register($container);

    $container->getDefinition('extension.list.theme')
      ->setClass(VfsThemeExtensionList::class);
  }

  /** * {@inheritdoc} */
  protected function setUpFilesystem() {
    parent::setUpFilesystem();

    $vfs_root = vfsStream::setup('core');
    vfsStream::create([
      'themes' => [
        'test_missing_base_theme' => [
          'test_missing_base_theme.info.yml' => file_get_contents(DRUPAL_ROOT . '/core/tests/fixtures/test_missing_base_theme/test_missing_base_theme.info.yml'),
          'test_missing_base_theme.theme' => file_get_contents(DRUPAL_ROOT . '/core/tests/fixtures/test_missing_base_theme/test_missing_base_theme.theme'),
        ],
      ],
    ], $vfs_root);
  }