Unit Testing Angular Plugins

import { TestBed } from '@angular/core/testing';
import { MyPluginModule } from './my-plugin.module';
import { MyPluginService } from './my-plugin.service';
import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';

describe('MyPluginService', () => {
  let service: MyPluginService;
  let httpMock: HttpTestingController;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [MyPluginModule, HttpClientTestingModule],
      providers: [MyPluginService]
    });
    service = TestBed.inject(MyPluginService);
    httpMock = TestBed.inject(HttpTestingController);
  });

  it('should be created', () => {
    expect(service).toBeTruthy();
  });

  // Example test for a method getData from MyPluginService
  it('should retrieve data', () => {
    const dummyData = [{ name: 'Test Data' }];
    service.getData().subscribe(data => {
      expect(data.length).toBe(1);
      expect(data).toEqual(dummyData);
    });

    const request = httpMock.expectOne(`${service.apiUrl}/data`);
    expect(request.request.method).toBe('GET');
    request.flush(dummyData);
  });

  afterEach(() => {
    httpMock.verify();
  });
});