如何在角度单元测试中发送请求前验证body

import { TestBed } from '@angular/core/testing';
import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';

// 其他导入语句...

beforeEach(() => {
  TestBed.configureTestingModule({
    imports: [HttpClientTestingModule],
    // 其他配置项...
  });

  // 其他初始化代码...
});

it('should send request with correct body', () => {
  const httpTestingController = TestBed.inject(HttpTestingController);
  const testData = { name: 'John', age: 25 };

  // 发送请求
  myService.sendRequest(testData).subscribe();

  // 拦截请求
  const req = httpTestingController.expectOne('api/endpoint');
  expect(req.request.method).toEqual('POST');
  expect(req.request.body).toEqual(testData);

  // 返回响应
  req.flush({ status: 'success' });

  // 验证其他断言...
});