如何在单元测试中创建组件之前设置路由

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

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

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

  beforeEach(() => {
    fixture = TestBed.createComponent(MyComponent);
    component = fixture.componentInstance;

    // 设置路由状态
    TestBed.inject(Router).navigate(['/my-route']); 
    fixture.detectChanges();
  });

  it('should create', () => {
    expect(component).toBeTruthy();
  });

  // 其他测试用例...
});