如何使用 Jasmine 对 angular2 的 canActivate 保护方法进行单元测试? [英] How to unit-test canActivate guard method of angular2 using Jasmine?

问题描述

很抱歉提出此类问题.但是我找不到任何关于编写 canActivate 保护文件测试的博客或 youtube 教程.官方文档中也没有提到任何内容.

Sorry for asking this type of question. But I'm not able to find any blog or youtube tutorials on writing the canActivate guard file testing. Nor in the official documentation there is anything mentioned.

任何帮助将不胜感激.

推荐答案

由于没有人回答我的问题，所以我粘贴我的代码片段以供参考，以帮助可能遇到这种情况的人.

since no one answered my question, so I'm pasting my code snippet for the reference to help people who might get this situation.

sampleLoggedIn.guard.ts

import {Injectable} from '@angular/core';
import {Router, CanActivate} from '@angular/router';
import {StorageService} from '../storage.service';

@Injectable()
export class LoggedInGuard implements CanActivate {
    constructor(private router: Router, private storageService: StorageService) {
    }

    /**Overriding canActivate to guard routes
     *
     * This method returns true if the user is not logged in
     * @returns {boolean}
     */
    canActivate() {
        if (this.storageService.isLoggedIn) {
            return true;
        } else {
            this.router.navigate(['home']);
            return false;
        }
    }
}

sampleLoggedIn.guard.spec.ts

import {TestBed, async} from '@angular/core/testing';
import {FormsModule} from '@angular/forms';
import {HttpModule} from '@angular/http';
import {CommonModule} from '@angular/common';
import 'rxjs/Rx';
import 'rxjs/add/observable/throw';
import {Router} from '@angular/router';
import 'rxjs/add/operator/map';
import {LoggedInGuard} from './loggedin.guard';
import {StorageService} from '../storage.service';
import {CookieService} from 'angular2-cookie/core';

describe('Logged in guard should', () => {
    let loggedInGuard: LoggedInGuard;
    let storageService: StorageService;
    let router = {
        navigate: jasmine.createSpy('navigate')
    };

    // async beforeEach
    beforeEach(async(() => {
        TestBed.configureTestingModule({
            imports: [FormsModule, CommonModule, HttpModule],
            providers: [LoggedInGuard, StorageService, CookieService,
                {provide: Router, useValue: router}
            ]
        })
            .compileComponents(); // compile template and css
    }));

    // synchronous beforeEach
    beforeEach(() => {
        loggedInGuard = TestBed.get(LoggedInGuard);
        storageService = TestBed.get(StorageService);
    });

    it('be able to hit route when user is logged in', () => {
        storageService.isLoggedIn = true;
        expect(loggedInGuard.canActivate()).toBe(true);
    });

    it('not be able to hit route when user is not logged in', () => {
        storageService.isLoggedIn = false;
        expect(loggedInGuard.canActivate()).toBe(false);
    });
});

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