在使用relativeTo时如何测试router.navigate方法？

import { TestBed, ComponentFixture } from '@angular/core/testing';
import { RouterTestingModule } from '@angular/router/testing';
import { Component } from '@angular/core';
import { Router, ActivatedRoute } from '@angular/router';

@Component({
  template: ''
})
class TestComponent {}

describe('Router Navigation Test', () => {
  let fixture: ComponentFixture<TestComponent>;
  let router: Router;

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

  beforeEach(() => {
    fixture = TestBed.createComponent(TestComponent);
    router = TestBed.inject(Router);
  });

  it('should navigate using relativeTo', () => {
    const route = TestBed.inject(ActivatedRoute);
    spyOn(router, 'navigate');

    // 导航到相对路径，并将relativeTo参数设置为组件或ActivatedRoute实例
    router.navigate(['./path'], { relativeTo: route });

    // 触发变化检测
    fixture.detectChanges();

    // 验证导航是否成功
    expect(router.navigate).toHaveBeenCalledWith(['./path'], { relativeTo: route });
  });
});