Angular 单元测试 TypeError：this.http.get(...).pipe 不是函数

Angular单元测试中的TypeError：this.http.get(...).pipe不是函数

typescript
// 在测试文件中的 beforeEach 中确保 HttpClient 的正确注入
import { TestBed } from '@angular/core/testing';
import { HttpClientTestingModule } from '@angular/common/http/testing';
beforeEach(() => {
  TestBed.configureTestingModule({
    imports: [HttpClientTestingModule],
    // 其他配置...
  });
});

typescript
import { HttpTestingController, HttpClientTestingModule } from '@angular/common/http/testing';
import { TestBed } from '@angular/core/testing';
import { YourService } from './your.service';
describe('YourService', () => {
  let service: YourService;
  let httpTestingController: HttpTestingController;
  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [HttpClientTestingModule],
      providers: [YourService],
    });
    service = TestBed.inject(YourService);
    httpTestingController = TestBed.inject(HttpTestingController);
  });
  // 编写测试用例...
});