Angular 带karma的角度单元测试:会话存储“无法读取未定义的属性”
我有一个服务,在用户登录时将基本用户配置信息存储在会话存储中。然后,我在整个应用程序中调用该服务,在需要时返回配置Angular 带karma的角度单元测试:会话存储“无法读取未定义的属性”,angular,unit-testing,karma-jasmine,Angular,Unit Testing,Karma Jasmine,我有一个服务,在用户登录时将基本用户配置信息存储在会话存储中。然后,我在整个应用程序中调用该服务,在需要时返回配置 export class ClientConfigService { response: LoginConfig = initialClientConfig; private configResponse = new BehaviorSubject(this.response); configData = this.configResponse.asObservable
export class ClientConfigService {
response: LoginConfig = initialClientConfig;
private configResponse = new BehaviorSubject(this.response);
configData = this.configResponse.asObservable();
constructor(private apiService: ApiService) { }
setSessionStorage(data: LoginConfig) {
sessionStorage.setItem('client', JSON.stringify(data));
this.configResponse.next(data);
}
getClientConfig(clientId: string) {
const clientSetup = { startUrl: `${environment.apiUrl}/${clientId}` };
return this.apiService.post(`yd-core/npb/start`, clientSetup).subscribe((data: LoginConfig) => {
this.configResponse.next(data);
});
}
getPageData() {
const sessionConfig: LoginConfig = JSON.parse(sessionStorage.getItem('config'));
return sessionConfig.client.config;
}
getClientId() {
const sessionConfig: LoginConfig = JSON.parse(sessionStorage.getItem('config'));
return sessionConfig.client.clientId;
}
getCurrentUser() {
const sessionConfig: LoginConfig = JSON.parse(sessionStorage.getItem('config'));
return sessionConfig.user;
}
}
当我运行ng测试时,我得到了许多TypeError的实例:无法读取null的属性“client”
我知道我需要模拟会话存储。。我在这里尝试,但没有效果
import { TestBed } from '@angular/core/testing';
import { ClientConfigService } from './client-config.service';
import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
import { HttpClient } from '@angular/common/http';
import { RouterModule } from '@angular/router';
import { ApiService } from './api.service';
import { initialClientConfig } from '../models/user';
describe('ClientConfigService', () => {
let httpClient: HttpClient;
let httpTestingController: HttpTestingController;
beforeEach(() => {
window.sessionStorage.setItem('client', JSON.stringify({client : {} }));
TestBed.configureTestingModule({
imports: [
HttpClientTestingModule,
RouterModule.forRoot([]),
],
providers: [
ApiService
]
})
.compileComponents();
httpClient = TestBed.get(HttpClient);
httpTestingController = TestBed.get(HttpTestingController);
});
it('should be created', () => {
const service: ClientConfigService = TestBed.get(ClientConfigService);
expect(service).toBeTruthy();
});
});
我可能遗漏了一些东西,但对我来说,设置sessionStorage的唯一时间是使用“client”键,而每次从sessionStorage中提取时,都使用“config”键。这会不会像你把钥匙弄错那么简单?我认为这更像是一个依赖注入问题。您希望这一行能够正常工作:
const service: ClientConfigService = TestBed.get(ClientConfigService);
当ClientConfigService不是测试模块的一部分时。另外,因为您的ClientConfigService依赖于ApiService;您必须确保已满足ApiService的依赖项要求
理想情况下,在单元测试中,一次只能测试一件事情。我建议您在此测试中通过更改以下内容模拟您的ApiService:
providers: [
ApiService
]
为此:
providers: [
{provide: ApiService, useValue: {"...mock properties here"}}
]
我希望这有帮助,
Isaac问题是我只是把钥匙命名错了。我在做什么
window.sessionStorage.setItem('client', JSON.stringify({client : {} }));
而不是
window.sessionStorage.setItem('config', JSON.stringify(initialClientConfig))
如果用户未登录,则initialClientConfig是占位符/默认配置。