位置從@角/共同不起作用在單元測試類

Question

出於某種原因Location.normalize（）等函數，當我運行測試，不返回正確的響應：

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'); 
    })); 
}); 

控制檯日誌：

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) 

依賴關係：

"@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" 

爲什麼normilize返回空？加密文檔：

normalize（url：string）：string;

給定一個表示URL的字符串，返回標準化的URL路徑，不帶前導斜槓或結尾斜線。

Answer 1

因爲位置服務的RouterTestingModule provides a different implementation，SpyLocation。而這個實現always returns null。