如果被拒绝的承诺被抓住，如何使测试失败？

Question

如果被拒绝的承诺被抓住，如何使测试失败？

我正在尝试为异步登录功能设置角度服务测试。

如果它返回一个由承诺处理的被拒绝的承诺，则测试应该失败。但是测试始终是成功的。

打字稿

it('should sign-in with email and password', async(() => {

const service: AuthService = TestBed.get(AuthService);

// the strings can't be empty the service returns a rejected promise.
service.signInWithEmailAndPassword('', '').then(user => {


  }).catch(error => {

    fail();
  });
}));

业力抛出此错误：

ERROR: 'Unhandled Promise rejection:', ''fail' was used when there was no current spec, this could be because an asynchronous test timed out', '; Zone:', 'ProxyZone', '; Task:', 'Promise.then', '; Value:', Error: 'fail' was used when there was no current spec, this could be because an asynchronous test timed out
Error: 'fail' was used when there was no current spec, this could be because an asynchronous test timed out