尝试使用调用rest API的服务依赖项来测试组件,使用扩展实际服务的类来创建服务的模拟版本.
现在如果我用模拟的那个覆盖提供者,那么奇怪的错误来自业力记者,首先是404个不存在的文件(真的不应该存在),然后是“{originalErr：{}}”.我的意思是至少告诉我我做错了什么:)
我的测试服：
describe('App: HeaderComponent',() => {
it('should get categories on initialization',async(
inject([TestComponentBuilder],(builder: TestComponentBuilder) => {
let fixture: ComponentFixture<HeaderComponent>;
expect(builder).toBeDefined();
return builder
.overrideProviders(HeaderComponent,[{provide: CategoryService,useClass: MockCategoryService}])
.createAsync(HeaderComponent).then((_fixture) => {
fixture = _fixture;
let $el = fixture.debugElement;
let el = $el.nativeElement;
let component = $el.componentInstance;
component.ngOnInit();
fixture.detectChanges();
expect(el.querySelector('a')).toHaveText('Electric');
});
})
)
);
});
输出：
01 08 2016 11:58:29.684:WARN [karma]: No captured browser,open http://localhost:9876/ 01 08 2016 11:58:29.713:INFO [karma]: Karma v1.1.2 server started at http://localhost:9876/ 01 08 2016 11:58:29.718:INFO [launcher]: Launching browser Chrome with unlimited concurrency 01 08 2016 11:58:29.729:INFO [launcher]: Starting browser Chrome 01 08 2016 11:58:32.277:INFO [Chrome 52.0.2743 (Windows 10 0.0.0)]: Connected on socket /#Semtu7s7yqM-TW0GAAAA with id 14496897 01 08 2016 11:58:35.315:WARN [web-server]: 404: /base/dist/app/shared/services.js 01 08 2016 11:58:35.318:WARN [web-server]: 404: /base/dist/app/shared/services/mocks.js Chrome 52.0.2743 (Windows 10 0.0.0) ERROR { "originalErr": {} }
如果我删除测试通过的行(但不执行“then(…)”代码块)：
overrideProviders(HeaderComponent,[{provide：CategoryService,useClass：MockCategoryService}])
解决方法
好吧,如果有人遇到同样的问题,原来应该导入“ts”文件本身,而不是通过桶.意思是你应该写这样的东西：
import { CategoryService } from '../../shared/services/category/category.service';
import { MockCategoryService } from '../../shared/services/category/category.service.mock';
代替
import { CategoryService,MockCategoryService } from '../../shared/services/category';
即使您在导出文件的目录中有index.ts.
哇,嗯？
仍然存在不执行异步操作的问题,我不知道为什么
