如何为打开模式的 Angular Http 拦截器编写单元测试?
How can I write a unit test for an Angular5 HttpInterceptor that opens a modal?
我的拦截器是:
@Injectable()
export class ErrorInterceptor implements HttpInterceptor {
constructor(private _ngbModal: NgbModal) {}
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
return next.handle(request)
.catch((err) => {
let componentInstance = this._ngbModal.open(ErrormodalComponent, {size: 'sm', backdrop: 'static' }).componentInstance
switch(err.status) {
case 401:
componentInstance["message"] = "User session lost, please logout and log back in."
break;
case 404:
componentInstance["message"] = "API Route Not found"
break;
default:
componentInstance["message"] = "API Currently Unavailable. Please try again."
break;
}
return Observable.throw(err);
})
}
}
而且我想编写一个测试来检查是否打开了模式,并根据状态显示了适当的消息。
谢谢
我会嘲笑 _ngbModal 并监视 open 方法并返回一个组件实例并检查 componentInstance 上的消息键。
由于_ngbModal是第三方的并且已经过测试,所以没必要实际测试模态
希望对您有所帮助。
我的拦截器是:
@Injectable()
export class ErrorInterceptor implements HttpInterceptor {
constructor(private _ngbModal: NgbModal) {}
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
return next.handle(request)
.catch((err) => {
let componentInstance = this._ngbModal.open(ErrormodalComponent, {size: 'sm', backdrop: 'static' }).componentInstance
switch(err.status) {
case 401:
componentInstance["message"] = "User session lost, please logout and log back in."
break;
case 404:
componentInstance["message"] = "API Route Not found"
break;
default:
componentInstance["message"] = "API Currently Unavailable. Please try again."
break;
}
return Observable.throw(err);
})
}
}
而且我想编写一个测试来检查是否打开了模式,并根据状态显示了适当的消息。
谢谢
我会嘲笑 _ngbModal 并监视 open 方法并返回一个组件实例并检查 componentInstance 上的消息键。
由于_ngbModal是第三方的并且已经过测试,所以没必要实际测试模态
希望对您有所帮助。