在Angular 13中，拦截器需要使用InjectionToken进行注入，以替代之前版本中的provide。

以下是一个示例拦截器：

import { Injectable, InjectionToken } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler } from '@angular/common/http';

export const API_BASE_URL = new InjectionToken('ApiBaseUrl');

@Injectable()
export class ApiUrlInterceptor implements HttpInterceptor {
  constructor(
    @Inject(API_BASE_URL) private baseUrl: string
  ) {}

  intercept(request: HttpRequest, next: HttpHandler) {
    const apiReq = request.clone({ url: `${this.baseUrl}/${request.url}` });
    return next.handle(apiReq);
  }
}

在 TestBed 中注入拦截器：

import { TestBed } from '@angular/core/testing';
import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
import { HTTP_INTERCEPTORS } from '@angular/common/http';
import { ApiUrlInterceptor, API_BASE_URL } from './api-url.interceptor';

describe('ApiUrlInterceptor', () => {
  let httpTestingController: HttpTestingController;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [HttpClientTestingModule],
      providers: [
        { provide: API_BASE_URL, useValue: 'https://example.com/api' },
        { provide: HTTP_INTERCEPTORS, useClass: ApiUrlInterceptor, multi: true },
      ],
    });

    httpTestingController = TestBed.inject(HttpTestingController);
  });

  afterAll(() => {
    httpTestingController.verify();
  });

  it('should add base URL to requests', () => {
    // Test logic
  });
});

从上面的示例中，您可以看到拦截器需要使用InjectionToken进行注入到 TestBed 中。这是唯一的变化，其他的测试过程与以前版本相同。