单元测试Angular router.events.pipe，然后是订阅

import { RouterTestingModule } from '@angular/router/testing';
import { Router, NavigationEnd } from '@angular/router';
import { TestBed } from '@angular/core/testing';
import { of } from 'rxjs';

describe('AppComponent', () => {
  let router: Router;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [RouterTestingModule],
    });
    router = TestBed.inject(Router);
  });

  it('should subscribe to router events', () => {
    spyOn(router.events, 'pipe').and.returnValue(of(new NavigationEnd(0, '/home', '/home')));
    
    // 在这里执行你的代码，订阅router.events.pipe并进行相应的断言和验证
    
    expect(router.events.pipe).toHaveBeenCalled();
  });
});