trait OEmbedTestTrait in Drupal 8

trait OEmbedTestTrait {

  /**
   * Returns the relative path to the oEmbed fixtures directory.
   *
   * @return string
   */
  protected function getFixturesDirectory() {
    return drupal_get_path('module', 'media') . '/tests/fixtures/oembed';
  }

  /**
   * Returns the absolute URL of the oEmbed fixtures directory.
   *
   * @return string
   */
  protected function getFixturesUrl() {
    return $this->baseUrl . '/' . $this
      ->getFixturesDirectory();
  }

  /**
   * Forces Media to use the provider database in the fixtures directory.
   */
  protected function useFixtureProviders() {
    $this
      ->config('media.settings')
      ->set('oembed_providers_url', $this
      ->getFixturesUrl() . '/providers.json')
      ->save();
  }

  /**
   * Configures the http_client service so that all requests are carried out
   * relative to the URL of the fixtures directory. For example, after calling
   * this method, a request for foobar.html will actually request
   * http://test-site/path/to/fuxtures/foobar.html.
   */
  protected function lockHttpClientToFixtures() {
    $this
      ->writeSettings([
      'settings' => [
        'http_client_config' => [
          'base_uri' => (object) [
            'value' => $this
              ->getFixturesUrl() . '/',
            'required' => TRUE,
          ],
        ],
      ],
    ]);
  }

  /**
   * Ensures that all oEmbed provider endpoints defined in the fixture
   * providers.json will use the media_test_oembed.resource.get route as their
   * URL.
   *
   * This requires the media_test_oembed module in order to work.
   */
  protected function hijackProviderEndpoints() {
    $providers = $this
      ->getFixturesDirectory() . '/providers.json';
    $providers = file_get_contents($providers);
    $providers = Json::decode($providers);
    $endpoint_url = Url::fromRoute('media_test_oembed.resource.get')
      ->setAbsolute()
      ->toString();

    /** @var \Drupal\media_test_oembed\ProviderRepository $provider_repository */
    $provider_repository = $this->container
      ->get('media.oembed.provider_repository');
    foreach ($providers as &$provider) {
      foreach ($provider['endpoints'] as &$endpoint) {
        $endpoint['url'] = $endpoint_url;
      }
      $provider_repository
        ->setProvider(new Provider($provider['provider_name'], $provider['provider_url'], $provider['endpoints']));
    }
  }

}