Angular 测试失败，无法在“XMLHttpRequest”上执行“发送”

标题: 解决Angular测试中的XMLHttpRequest发送失败问题

Cannot read property 'send' of null

typescript
import { TestBed } from '@angular/core/testing';
import { HttpClientTestingModule } from '@angular/common/http/testing';
TestBed.configureTestingModule({
  imports: [HttpClientTestingModule],
  // other configurations...
});

typescript
import { TestBed, inject } from '@angular/core/testing';
import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
import { YourService } from './your.service';
describe('YourService', () => {
  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [HttpClientTestingModule],
      providers: [YourService]
    });
  });
  it('should make a GET request', inject(
    [YourService, HttpTestingController],
    (service: YourService, httpMock: HttpTestingController) => {
      const testData = 'your test data';
      // Make the HTTP request
      service.getData().subscribe(data => {
        expect(data).toEqual(testData);
      });
      // Expect a single request to the specified URL
      const req = httpMock.expectOne('your/api/endpoint');
      // Respond with the mock data
      req.flush(testData);
      // Ensure that there are no outstanding requests
      httpMock.verify();
    }
  ));
});