Function addTagToRequest

packages/common/http/test/provider_spec.ts:673–682

(req: HttpRequest<unknown>, tag: string)

}

function addTagToRequest(req: HttpRequest<unknown>, tag: string): HttpRequest<unknown> {
  const prevTagHeader = req.headers.get('X-Tag') ?? '';
  const tagHeader = prevTagHeader.length > 0 ? prevTagHeader + ',' + tag : tag;

  return req.clone({
    setHeaders: {
      'X-Tag': tagHeader,
    },
  });
}

const FAKE_JSONP_BACKEND_PROVIDER = {
  provide: JsonpClientBackend,