Angular TypeError:无法读取属性';订阅';单元测试中未定义的
我正在尝试修复组件的“应该创建”单元测试。我得到以下信息:Angular TypeError:无法读取属性';订阅';单元测试中未定义的,angular,unit-testing,typescript,karma-runner,karma-jasmine,Angular,Unit Testing,Typescript,Karma Runner,Karma Jasmine,我正在尝试修复组件的“应该创建”单元测试。我得到以下信息: TypeError: Cannot read property 'subscribe' of undefined at ElectionResultsChartsComponent.webpackJsonp../src/app/pages/user/election-results/election-results-charts/election-results-charts.component.ts.ElectionResul
TypeError: Cannot read property 'subscribe' of undefined
at ElectionResultsChartsComponent.webpackJsonp../src/app/pages/user/election-results/election-results-charts/election-results-charts.component.ts.ElectionResultsChartsComponent.initElectionResultsData (http://localhost:9876/_karma_webpack_/webpack:/src/app/pages/user/election-results/election-results-charts/election-results-charts.component.ts:28:36)
at new ElectionResultsChartsComponent (http://localhost:9876/_karma_webpack_/webpack:/src/app/pages/user/election-results/election-results-charts/election-results-charts.component.ts:24:10)
at createClass (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/esm5/core.js:12481:1)
at createDirectiveInstance (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/esm5/core.js:12326:22)
at createViewNodes (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/esm5/core.js:13784:38)
at createRootView (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/esm5/core.js:13673:1)
at callWithDebugContext (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/esm5/core.js:15098:26)
at Object.debugCreateRootView [as createRootView] (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/esm5/core.js:14381:1)
at ComponentFactory_.webpackJsonp../node_modules/@angular/core/esm5/core.js.ComponentFactory_.create (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/esm5/core.js:11278:26)
at initComponent (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/esm5/testing.js:1150:1)
选举结果图表.component.spec:
describe('ElectionResultsChartsComponent', () => {
let component: ElectionResultsChartsComponent;
let fixture: ComponentFixture<ElectionResultsChartsComponent>;
const fakeActivatedRoute = {
snapshot: { data: {} }
}
let mockSomeService = {
getData: () => {}
}
const mockResultResolver = {
initElectionResultsData: () => new EmptyObservable()
};
beforeEach(async(() => {
TestBed.configureTestingModule({
imports: [
ChartsModule
],
declarations: [ ElectionResultsChartsComponent ],
providers: [
{ provide: ActivatedRoute, useValue: fakeActivatedRoute },
{ provide: ElectionResultsResolver, useValue: mockResultResolver },
]
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(ElectionResultsChartsComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
export class ElectionResultsChartsComponent implements OnDestroy {
private pieChartLabels:string[] = [];
private pieChartData:number[] = [];
private pieChartType:string = 'pie';
private parties: Party[] = [];
private subData: any;
constructor(private route: ActivatedRoute) {
this.initElectionResultsData();
}
initElectionResultsData() {
this.subData = this.route.data.subscribe(({ data }) => {
let electionResultResponse: ElectionResultResponse = data;
for(let party of electionResultResponse.parties) {
this.pieChartLabels.push(party.name);
this.pieChartData.push(party.voteCount)
}
});
}
ngOnDestroy() {
this.subData.unsubscribe();
}
}
@Injectable()
export class ElectionResultsResolver implements Resolve<any> {
constructor(private adminService: ElectionService) { }
resolve(route: ActivatedRouteSnapshot): Observable<any> {
let electionRequest: ElectionRequest = {id: +route.paramMap.get('id')}
return this.adminService.getElectionResults(electionRequest);
}
}
选举结果解析程序服务:
describe('ElectionResultsChartsComponent', () => {
let component: ElectionResultsChartsComponent;
let fixture: ComponentFixture<ElectionResultsChartsComponent>;
const fakeActivatedRoute = {
snapshot: { data: {} }
}
let mockSomeService = {
getData: () => {}
}
const mockResultResolver = {
initElectionResultsData: () => new EmptyObservable()
};
beforeEach(async(() => {
TestBed.configureTestingModule({
imports: [
ChartsModule
],
declarations: [ ElectionResultsChartsComponent ],
providers: [
{ provide: ActivatedRoute, useValue: fakeActivatedRoute },
{ provide: ElectionResultsResolver, useValue: mockResultResolver },
]
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(ElectionResultsChartsComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
export class ElectionResultsChartsComponent implements OnDestroy {
private pieChartLabels:string[] = [];
private pieChartData:number[] = [];
private pieChartType:string = 'pie';
private parties: Party[] = [];
private subData: any;
constructor(private route: ActivatedRoute) {
this.initElectionResultsData();
}
initElectionResultsData() {
this.subData = this.route.data.subscribe(({ data }) => {
let electionResultResponse: ElectionResultResponse = data;
for(let party of electionResultResponse.parties) {
this.pieChartLabels.push(party.name);
this.pieChartData.push(party.voteCount)
}
});
}
ngOnDestroy() {
this.subData.unsubscribe();
}
}
@Injectable()
export class ElectionResultsResolver implements Resolve<any> {
constructor(private adminService: ElectionService) { }
resolve(route: ActivatedRouteSnapshot): Observable<any> {
let electionRequest: ElectionRequest = {id: +route.paramMap.get('id')}
return this.adminService.getElectionResults(electionRequest);
}
}
@Injectable()
导出类SelectionResultsResolver实现解析{
构造函数(私有adminService:ElectionService){}
解析(路由:ActivatedRouteSnapshot):可观察{
let-electionRequest:electionRequest={id:+route.paramMap.get('id')}
返回此.adminService.getElectionResults(electionRequest);
}
}
该组件在加载页面之前使用路由解析器。解析器获取数据,组件将数据推送到数组
你知道我如何解决这个问题吗?我试着用谷歌搜索它,但找不到这个问题的正确答案
ActivatedRoute
一起使用,因此您应该将测试模块导入到应用程序中李>
试试这个:
import { RouterTestingModule } from '@angular/router/testing';
TestBed.configureTestingModule({
imports: [
ChartsModule, RouterTestingModule
],
....
RouterTestingModule
可以摆脱提供者李>
因此,请删除以下内容:
{ provide: ActivatedRoute, useValue: fakeActivatedRoute },
数据部分。你不是自找的,但这是方法李>
代码:
Object.defineProperty(component.route, 'data', {
writable: true,
value: Observable.of({/* everything your data will return must be mocked here */});
});
试试这个:this.route.snapshot.data.subscribe()@fatehamed确切位置在哪里?很抱歉问你。你的代码在没有运行单元测试的情况下工作正常吗?@AmitChigadani是的!