Angular单元测试如何测试routerLink

import { TestBed, ComponentFixture } from '@angular/core/testing';
import { RouterTestingModule } from '@angular/router/testing';
import { Router } from '@angular/router';
import { MyComponent } from './my.component';

describe('MyComponent', () => {
  let component: MyComponent;
  let fixture: ComponentFixture<MyComponent>;
  let router: Router;

  beforeEach(async () => {
    await TestBed.configureTestingModule({
      imports: [RouterTestingModule],
      declarations: [MyComponent]
    }).compileComponents();
  });

  beforeEach(() => {
    fixture = TestBed.createComponent(MyComponent);
    component = fixture.componentInstance;
    router = TestBed.inject(Router);
    fixture.detectChanges();
  });

  it('should navigate to the target route', () => {
    const navigateSpy = spyOn(router, 'navigateByUrl');
    component.navigateToTargetRoute();
    expect(navigateSpy).toHaveBeenCalledWith('/target-route');
  });
});