Angular2 -模拟Angular2-toaster for Jasmine单元测试

import { TestBed, ComponentFixture } from '@angular/core/testing';
import { ToastrService } from 'angular2-toaster';

describe('Component', () => {
  let component: Component;
  let fixture: ComponentFixture<Component>;
  let toastrServiceSpy: jasmine.SpyObj<ToastrService>;

  beforeEach(() => {
    // 创建ToastrService的模拟对象
    toastrServiceSpy = jasmine.createSpyObj('ToastrService', ['success', 'error']);

    TestBed.configureTestingModule({
      declarations: [Component],
      providers: [
        // 将模拟对象提供给组件
        { provide: ToastrService, useValue: toastrServiceSpy }
      ]
    });

    fixture = TestBed.createComponent(Component);
    component = fixture.componentInstance;
  });

  it('should display success message', () => {
    // 调用组件中使用到的Angular2-toaster方法
    component.showSuccessMessage();

    // 验证模拟对象的方法是否被调用
    expect(toastrServiceSpy.success).toHaveBeenCalled();
  });

  it('should display error message', () => {
    // 调用组件中使用到的Angular2-toaster方法
    component.showErrorMessage();

    // 验证模拟对象的方法是否被调用
    expect(toastrServiceSpy.error).toHaveBeenCalled();
  });
});