如何解决使用Jest运行测试时，Adal.service.ts在角度上对我不起作用
请帮助我。
我要迁移到Jest来运行ANGULAR的单元测试，但是执行时出现错误：
失败 src / app / modules / dashboard / components / navbar / navbar.component.spec.ts
测试套件无法运行ReferenceError: AuthenticationContext is not defined 6 | 7 | declare var AuthenticationContext: adal.AuthenticationContextStatic; > 8 | const createAuthContextFn: adal.AuthenticationContextStatic = AuthenticationContext; | ^ 9 | 10 | @Injectable() 11 | export class AdalService { at Object.<anonymous> (src/app/core/authentication/adal.service.ts:8:63) at Object.<anonymous> (src/app/core/authentication/adal-access.guard.ts:3:1) at Object.<anonymous> (src/app/modules/dashboard/components/navbar/navbar.component.spec.ts:5:1)测试套件：1个失败，总共1个
当我用Jest运行测试时，Adal.service.ts在角度上对我不起作用。
当我与业力一起运作时，它会起作用
这是测试：
import { Store } from '@ngrx/store';
import { RouterTestingModule } from '@angular/router/testing';
import { MatMenuModule } from '@angular/material/menu';
import { AdalConfigService } from './../../../../core/authentication/adal-config.service';
import { AdalAccessGuard } from './../../../../core/authentication/adal-access.guard';
import { AdalService } from '@authentication/adal.service';
import { environment } from '@env/environment';
import { APP_CONFIG } from '@app/app.config';
import { async,ComponentFixture,TestBed } from '@angular/core/testing';
import { NavbarComponent } from './navbar.component';
describe('NavbarComponent',() => {
let component: NavbarComponent;
let fixture: ComponentFixture<NavbarComponent>;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [NavbarComponent],imports: [
RouterTestingModule,MatMenuModule
],providers: [
{
provide: Store,useValue: {
dispatch: jest.fn(),pipe: jest.fn()
}
},AdalService,AdalConfigService,AdalAccessGuard,{
provide: APP_CONFIG,useValue: {
apiEndpoint: environment.apiEndPoint,clientId: environment.azureActiveDirectory.clientId,tenantId: environment.azureActiveDirectory.tenantId,resource: environment.azureActiveDirectory.resource,redirectUri: environment.azureActiveDirectory.redirectUri
}
}]
})
.compileComponents();
}));
beforeEach(() => {
let mockAdalError;
let mockAdal;
fixture = TestBed.createComponent(NavbarComponent);
component = fixture.componentInstance;
mockAdalError = false;
mockAdal = {
userName: 'xxx',profile: {
aud: 'xxx',}
};
});
it('should create',() => {
expect(component).toBeTruthy();
});
});- 经过组件测试：
import { AdalService } from '@authentication/adal.service';
import { Component,OnInit } from '@angular/core';
@Component({
selector: 'app-navbar',templateUrl: './navbar.component.html',styleUrls: ['./navbar.component.scss']
})
export class NavbarComponent implements OnInit {
public name;
public surname;
public email;
constructor( private adalService: AdalService ) { }
ngOnInit() {
this.loadUserInfo(this.adalService.userInfo);
}
onLogout(): void {
this.adalService.logout();
}
loadUserInfo(adalUser: any): void {
if (adalUser) {
this.name = XXX;
this.email = XXX;
} else {
this.name = 'No disponible';
this.email = 'No disponible';
}
}
}这是ADAL的服务
import { Injectable } from '@angular/core';
import { Observable,Subscriber } from 'rxjs';
import { retry } from 'rxjs/operators';
import { AdalConfigService } from './adal-config.service';
import { adal } from 'adal-angular';
declare var AuthenticationContext: adal.AuthenticationContextStatic;
const createAuthContextFn: adal.AuthenticationContextStatic = AuthenticationContext;
@Injectable()
export class AdalService {
private context: adal.AuthenticationContext;
constructor(private configService: AdalConfigService) {
this.context = new createAuthContextFn(configService.adalSettings);
}
login() {
this.context.login();
}
logout() {
this.context.logOut();
}
get authContext() {
return this.context;
}
handleWindowCallback() {
this.context.handleWindowCallback();
}
public get userInfo() {
return this.context.getCachedUser();
}
public get accessToken() {
return this.context.getCachedToken(this.configService.adalSettings.clientId);
}
public get isAuthenticated() {
return this.userInfo && this.accessToken;
}
public isCallback(hash: string) {
return this.context.isCallback(hash);
}
public getLoginError() {
return this.context.getLoginError();
}
public getAccessToken(endpoint: string,callbacks: (message: string,token: string) => any) {
return this.context.acquireToken(endpoint,callbacks);
}
public acquireTokenResilient(resource: string): Observable<any> {
return new Observable<any>((subscriber: Subscriber<any>) =>
this.context.acquireToken(resource,(message: string,token: string) => {
token ? subscriber.next(token) : subscriber.error(message);
})
).pipe(retry(3));
}
}我正在使用以下版本：“ adal-angular”：“ ^ 1.0.17”，
解决方法
解决您的问题
要使安装顺利进行，必须在全局某处初始化AuthenticationContext。我认为这是通过在您的index.html或polyfills.ts中加载一些adal脚本在您的代码的浏览器中发生的。
Jest不会加载这些文件，因此不会在任何地方初始化AuthenticationContext。
使用变量declare var AuthenticationContext: adal.AuthenticationContextStatic的声明，您告诉TypeScript：“我保证我会在其他地方全局初始化此变量”，但看来您不是在Jest运行中这样做。
解决方案是在需要的测试文件中导入用于初始化AuthenticationContext的脚本，或者在需要的文件中手动进行脚本：
// 1. Initialize Variable
// not sure if you can initialize it like this,see the adal docs or source code
globalThis.AuthenticationContext = new AuthenticationContext();
// 2. Tell TypeScript compiler about this variable
declare const AuthenticationContext: adal.AuthenticationContextStatic;
单元测试
您谈论的是单元测试，但是您的测试看起来并不像单元测试，因为您没有以孤立的方式对其进行测试。
如果要按单元测试每个组件，则完全不应实例化AuthenticationContext来测试NavBar。并非来自NavBar内部的所有其他组件和对象都应被模拟并作为虚拟对象提供。这样也可以间接解决您的问题。
要更好地理解这一点，请查看《 Angular测试指南》和jest文档。
欢呼和快乐的编码！
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