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嗨我试图为我的服务编写单元测试遵循此过程:https://developers.livechatinc.com/blog/testing-angular-2-apps-dependency-injection-and-components/但我不断收到错误。Angular2测试服务 - undefined服务
这里是服务测试
import {it,inject,injectAsync,beforeEachProviders,TestComponentBuilder} from 'angular2/testing';
import {CORE_DIRECTIVES,FORM_DIRECTIVES,FormBuilder,ControlGroup,Validators,AbstractControl} from 'angular2/common';
import {KibanaDataServices} from "./kibana-data-services";
import {Http,Response,Headers, HTTP_PROVIDERS, ConnectionBackend} from 'angular2/http';
declare let $:JQueryStatic;
describe('KibanaDataServices',() => {
beforeEach(function() {
this.kibanaDataServices = new KibanaDataServices()
});
it("date properly formats for trends view",function(){
// logs as {}
console.log("this is " + JSON.stringify(this));
// logs as undefined
console.log("this.kibanaDataServices is " + this.kibanaDataServices);
let dateQuery: string = this.kibanaDataServices.formulateQueryDates("7d");
expect(dateQuery).toEqual("(from:'now-7d',mode:quick,to:'now'))");
});
});
而为的console.log这是一个空对象,this.kibanaDataServices简直是不确定的。我指定的路径是正确的,因为kibana-data-services和kibana-data-services.spec.ts(这个测试文件)在同一个文件夹中,所以我不确定是哪里出了问题。
我得到具体的错误是:
TypeError: Attempted to assign to readonly property. in /Users/project/config/spec-bundle.js (line 42836)
TypeError: undefined is not an object (evaluating 'this.kibanaDataServices.formulateQueryDates') in /Users/project/config/spec-bundle.js (line 42841)
UPDATE: 不使用“这个”导致了“它”语句定义的不是一个错误
describe('KibanaDataServices',() => {
beforeEach(function() {
kibanaDataServices = new KibanaDataServices()
});
it("date properly formats for trends view",function(){
console.log("kibanaDataServices is " + kibanaDataServices);
let dateQuery: string = kibanaDataServices.formulateQueryDates("7d");
expect(dateQuery).toEqual("(from:'now-7d',mode:quick,to:'now'))");
});
});
当,但我怎么能在beforeEach定义,并访问它的“它”的语句
this
。我无法创建一个全球性的,因为我处于严格模式 – es3735746这不是全球性的。尝试一下。在我之前发布的'beforeEach' –
之前声明吧。 – es3735746