Function actAsync

packages/private/testing/src/utils.ts:314–318

(fn: () => T)

 * ```
 */
export async function actAsync<T>(fn: () => T): Promise<T> {
  const result = fn();
  await TestBed.inject(ApplicationRef).whenStable();
  return result;
}

/**
 * Executes a function and flushes the Angular scheduler synchronously.