在测试中使用fakeAsync会导致Angular 4和Zone.js出现错误

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

describe('MyComponent', () => {
  let component: MyComponent;

  beforeEach(fakeAsync(() => {
    TestBed.configureTestingModule({
      declarations: [MyComponent],
    }).compileComponents();
    component = TestBed.createComponent(MyComponent).componentInstance;
  }));

  it('should do something async', fakeAsync(() => {
    // 在这里编写你的测试用例
  }));
});

describe('MyComponent', () => {
  let component: MyComponent;

  beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [MyComponent],
    }).compileComponents();
    component = TestBed.createComponent(MyComponent).componentInstance;
  });

  it('should do something async', () => {
    fakeAsync(() => {
      // 在这里编写你的测试用例
    });
  });
});

it('should do something async', fakeAsync(() => {
  // 模拟异步操作
  component.someAsyncMethod();

  // 等待异步操作完成
  tick();

  // 检查异步操作的结果
  expect(component.someValue).toBe('expected value');
}));

npm install zone.js core-js --save