Angular 如何注入一个接受注入令牌的服务，并在9中使用testbed.inject对其进行测试？

我最近将我的应用程序从Angular8迁移到Angular9。对于所有注入的服务，将Testbed.get（服务）更改为Testbed.inject（服务）工作正常

然而，如果服务采用字符串注入令牌，比如

Testbed.get（'StringToken'）

原始设置：

//appModule.ts
providers: [
    {
      provide: 'ApiService',
      useClass: ApiService
    },

另一项我正在注射的服务

//xyz.service.ts
export class XYZService {


  constructor(
    @Inject('ApiService') private apiService: ApiServiceInterface,
    private configurationService: ConfigurationService,
  ) {
 
  }

当我在规范文件中使用testbed.get时，一切正常，但我得到一个警告，testbed.get已贬值

//xyz.service.spec.ts
describe('XYZService', () => {
  let configurationService: ConfigurationService;
  let apiService: ApiServiceInterface;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [
        HttpClientModule,
        TranslateModule.forRoot(),
        AppTestingModule
      ],
    });
    configurationService = TestBed.inject(ConfigurationService);
    cacheService = TestBed.inject(CacheService);
    apiService = Testbed.get('ApiService');
  });

根据angular文档，我在一个单独的文件中创建了一个InjectionToken，并到处导入它。 这是新的设置

//token.ts
import { InjectionToken } from '@angular/core';
import { ApiService } from './app/services/api/api.service';

export const TOKEN1 = new InjectionToken<ApiService>('ApiService');

服务似乎未启动，并且没有任何测试正在运行。我是不是错过了什么

//token.ts
import { InjectionToken } from '@angular/core';
import { ApiService } from './app/services/api/api.service';

export const TOKEN1 = new InjectionToken<ApiService>('ApiService');

//appModule.ts
providers: [
    {
      provide: TOKEN1,
      useClass: ApiService
    },

//xyz.service.ts
export class XYZService {


  constructor(
    @Inject(TOKEN1) private apiService: ApiServiceInterface,
    private configurationService: ConfigurationService,
  ) {

  }

//xyz.service.spec.ts
describe('XYZService', () => {
  let configurationService: ConfigurationService;
  let apiService: ApiServiceInterface;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [
        HttpClientModule,
        TranslateModule.forRoot(),
        AppTestingModule
      ],
    });
    configurationService = TestBed.inject(ConfigurationService);
    cacheService = TestBed.inject(CacheService);
    apiService = Testbed.inject(TOKEN1); //Throws a lot of errors
  });