位置从@角/共同不起作用在单元测试类

问题描述：

出于某种原因Location.normalize（）等函数，当我运行测试，不返回正确的响应：位置从@角/共同不起作用在单元测试类

import { Router } from '@angular/router'; 
import { Location } from "@angular/common"; 
import { TestBed, async, tick } from '@angular/core/testing'; 
import { RouterTestingModule } from '@angular/router/testing'; 

describe('Location',() => { 

    let location: Location; 
    let router = { 
    navigate: jasmine.createSpy('navigate') 
    }; 

    beforeEach(async(() => { 
    TestBed.configureTestingModule(
     { 
     declarations: [], 
     providers: [ 
      { 
      provide: Router, 
      useValue: router 
      } 
     ], 
     imports: [ 
      RouterTestingModule 
     ] 
     } 
    ).compileComponents(); 

    location = TestBed.get(Location); 
    })); 
    it('TEST', async(() => { 
    expect(location.normalize('/test/')).toBe('test'); 
    })); 
});

控制台日志：

Chrome 61.0.3163 (Linux 0.0.0) Location TEST FAILED 
    Expected null to be 'test'. 
     at new ZoneAwareError home/yuriy/projects/frontend/checkout/node_modules/zone.js/dist/zone.js:917:1) 
     at Object.<anonymous> home/yuriy/projects/frontend/checkout/src/modules/checkout/services/finished-flow.guard.spec.ts:143:42) 
     at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invoke home/yuriy/projects/frontend/checkout/node_modules/zone.js/dist/zone.js:365:1) 
     at AsyncTestZoneSpec.webpackJsonp.../../../../zone.js/dist/async-test.js.AsyncTestZoneSpec.onInvoke home/yuriy/projects/frontend/checkout/node_modules/zone.js/dist/async-test.js:49:1) 
     at ProxyZoneSpec.webpackJsonp.../../../../zone.js/dist/proxy.js.ProxyZoneSpec.onInvoke home/yuriy/projects/frontend/checkout/node_modules/zone.js/dist/proxy.js:76:1) 
     at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invoke home/yuriy/projects/frontend/checkout/node_modules/zone.js/dist/zone.js:364:1) 
     at Zone.webpackJsonp.../../../../zone.js/dist/zone.js.Zone.runGuarded home/yuriy/projects/frontend/checkout/node_modules/zone.js/dist/zone.js:138:1) 
     at runInTestZone home/yuriy/projects/frontend/checkout/node_modules/@angular/core/bundles/core-testing.umd.js:110:1) 
     at Object.<anonymous> home/yuriy/projects/frontend/checkout/node_modules/@angular/core/bundles/core-testing.umd.js:49:1) 
Chrome 61.0.3163 (Linux 0.0.0): Executed 3 of 3 (1 FAILED) (0 secs/0.385 secs)

依赖关系：

"@angular/cli": "1.3.0", 
"@angular/common": "2.4.7", 
"@angular/compiler": "2.4.7", 
"@angular/compiler-cli": "2.4.7", 
"@angular/core": "2.4.7", 
"@angular/forms": "2.4.7", 
"@angular/http": "2.4.7", 
"@angular/platform-browser": "2.4.7", 
"@angular/platform-browser-dynamic": "2.4.7", 
"@angular/router": "3.4.7", 
"karma": "~1.7.0", 
"karma-chrome-launcher": "~2.1.1", 
"karma-cli": "~1.0.1", 
"karma-coverage-istanbul-reporter": "^1.2.1", 
"karma-jasmine": "~1.1.0", 
"karma-jasmine-html-reporter": "^0.2.2", 
"zone.js": "0.8.5"

为什么normilize返回空？加密文档：

normalize（url：string）：string;

给定一个表示URL的字符串，返回标准化的URL路径，不带前导斜杠或结尾斜线。

答

因为位置服务的RouterTestingModule provides a different implementation，SpyLocation。而这个实现always returns null。

位置从@角/共同不起作用在单元测试类

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