Angular2 / ng测试错误：‘未处理的承诺拒绝’

import { TestBed, async, fakeAsync, tick } from '@angular/core/testing';

describe('YourComponent', () => {
  beforeEach(async(() => {
    TestBed.configureTestingModule({
      // 配置测试模块
    }).compileComponents();
  }));

  it('should do something', fakeAsync(() => {
    const promise = new Promise((resolve, reject) => {
      // 模拟异步操作
      setTimeout(() => {
        resolve('resolved');
      }, 1000);
    });

    promise.then((result) => {
      // 处理Promise的解决情况
      expect(result).toBe('resolved');
    }).catch((error) => {
      // 处理Promise的拒绝情况
      fail(error);
    });

    tick(1000); // 模拟时间的流逝

    // 执行断言
    expect(something).toBe(someValue);
  }));
});