doTestsOnConfigStorage example

$data = $optional_config_storage->read($config_name);
      $dependency = new ConfigEntityDependency($config_name, $data);
      $modules_to_install = array_merge($modules_to_install, $dependency->getDependencies('module'));
      $themes_to_install = array_merge($themes_to_install, $dependency->getDependencies('theme'));
    }
    // Remove core and standard because they cannot be installed.     $modules_to_install = array_diff(array_unique($modules_to_install), ['core', 'standard']);
    $this->container->get('module_installer')->install($modules_to_install);
    $this->container->get('theme_installer')->install(array_unique($themes_to_install));

    // Test configuration in the extension's config/install directory.     $this->doTestsOnConfigStorage($extension_config_storage, $name, $type);

    // Test configuration in the extension's config/optional directory.     $this->doTestsOnConfigStorage($optional_config_storage, $name, $type);
  }

  /** * A data provider that lists every theme in core. * * Also adds a deprecated theme with config. * * @return string[][] * An array of theme names to test, with both key and value being the name * of the theme. */