2
我一直在試圖單元測試一個服務(AuthService
),取決於AngularFireAuth
。單元測試使用AngularFireAuth和模擬的服務authState
我正試圖找到一種方法來模擬或撬開Observable AngularFireAuth.authState
,而不是實際與Firebase交談的服務。
這裏是我的測試規範:
import { inject, TestBed } from '@angular/core/testing';
import { AngularFireModule } from 'angularfire2';
import { AngularFireAuth, AngularFireAuthModule } from 'angularfire2/auth';
import * as firebase from 'firebase/app';
import 'rxjs/add/observable/of';
// import { BehaviorSubject } from 'rxjs/BehaviorSubject';
import { Observable } from 'rxjs/Rx';
import { AuthService } from './auth.service';
import { environment } from '../../environments/environment';
const authState: firebase.User = null;
const mockAngularFireAuth: any = { authState: Observable.of(authState) };
describe('AuthService',() => {
beforeEach(() => {
TestBed.configureTestingModule({
imports: [AngularFireModule.initializeApp(environment.firebaseAppConfig)],
providers: [
{ provider: AngularFireAuth, useValue: mockAngularFireAuth },
AuthService
]
});
});
it('should be defined', inject([ AuthService ], (service: AuthService) => {
expect(service).toBeDefined();
}));
it('.authState should be null', inject([ AuthService ], (service: AuthService) => {
expect(service.authState).toBe(null);
}));
});
這裏是我(簡化)服務:
import { Injectable } from '@angular/core';
import { AngularFireAuth } from 'angularfire2/auth';
import * as firebase from 'firebase/app';
import { Observable } from 'rxjs/Rx';
@Injectable()
export class AuthService {
private authState: firebase.User;
constructor(private afAuth: AngularFireAuth) { this.init(); }
private init(): void {
this.afAuth.authState.subscribe((authState) => {
if (authState === null) {
this.afAuth.auth.signInAnonymously()
.then((authState) => {
this.authState = authState;
})
.catch((error) => {
throw new Error(error.message);
});
} else {
this.authState = authState;
}
}, (error) => {
throw new Error(error.message);
});
}
public get currentUser(): firebase.User {
return this.authState ? this.authState : undefined;
}
public get currentUserObservable(): Observable<firebase.User> {
return this.afAuth.authState;
}
public get currentUid(): string {
return this.authState ? this.authState.uid : undefined;
}
public get isAnonymous(): boolean {
return this.authState ? this.authState.isAnonymous : false;
}
public get isAuthenticated(): boolean {
return !!this.authState;
}
public logout(): void {
this.afAuth.auth.signOut();
}
}
我得到的錯誤Property 'authState' is private and only accessible within class 'AuthService'.
當然是,但我不我不想實際訪問它 - 我想模擬或劫持它,所以我可以從我的測試規範中控制它的價值。我相信我的代碼在這裏偏離我的代碼。
請注意我正在使用AngularFire2的版本^4
,並且引入了重大更改;這裏記錄:https://github.com/angular/angularfire2/blob/master/docs/version-4-upgrade.md
謝謝。那我怎麼能設置'authState'呢?假設我想測試Service中的currentUid getter。歡呼聲 –
不客氣。同樣,使用'Reflect.set(...)'。甚至更簡單,'service ['authState'] = ...'或'(service as any).authState = ...'。它看起來像純粹的TS問題,我會建議將'typescript'標記添加到問題而不是'firebase',因爲它在這裏是相關的。 – estus
太棒了!只是爲了教育自己;即使我不再用模擬重寫'AngularFireAuth'(即不再執行'{provider:AngularFireAuth,useValue:mockAngularFireAuth}'),那麼怎麼沒有調用Firebase?服務中的'init'應該創建一個匿名用戶。這不是(在測試過程中 - 它運行應用程序時),這很好,但爲什麼不呢? –