在单元测试中无法解析路由器的所有参数：（？，？，？，？，？，？，？）在单元测试中

问题描述：

我刚刚升级到Angular RC 5，现在所有使用'ROUTER_DIRECTIVES' '尝试单元测试组件时无法解析路由器的所有参数：（？，？，？，？，？，？，？）'。在单元测试中无法解析路由器的所有参数：（？，？，？，？，？，？，？）在单元测试中

import { inject, addProviders } from '@angular/core/testing'; 
import { ComponentFixture, TestComponentBuilder } from '@angular/core/testing'; 
import { Component } from '@angular/core'; 
import { ROUTER_DIRECTIVES, Router } from '@angular/router'; 

import { HomeComponent } from './home.component'; 
import { UserService } from '../_services/user.service'; 

describe('Component: Home',() => { 

    beforeEach(() => { 
    addProviders([HomeComponent, UserService, ROUTER_DIRECTIVES, Router]); 
    }); 

    it('should inject the component', inject([HomeComponent, UserService, ROUTER_DIRECTIVES, Router], 
    (component: HomeComponent) => { 
     expect(component).toBeTruthy(); 
     // expect(component.currentUser.firstname).toEqual('Jan'); 
    }));

完整的错误日志：

 Chrome 52.0.2743 (Windows 10 0.0.0) 
    Error: Can't resolve all parameters for Router: (?, ?, ?, ?, ?, ?, ?). 
     at new BaseException (webpack:///C:/ng/anbud/~/@angular/compiler/src/facade/exceptions.js:27:0 <- src/test.ts:2943:23) 
     at CompileMetadataResolver.getDependenciesMetadata (webpack:///C:/ng/anbud/~/@angular/compiler/src/metadata_resolver.js:551:0 <- src/test.ts:24542:19) 
     at CompileMetadataResolver.getTypeMetadata (webpack:///C:/ng/anbud/~/@angular/compiler/src/metadata_resolver.js:448:0 <- src/test.ts:24439:26) 
     at webpack:///C:/ng/anbud/~/@angular/compiler/src/metadata_resolver.js:594:0 <- src/test.ts:24585:41 
     at Array.forEach (native) 
     at CompileMetadataResolver.getProvidersMetadata (webpack:///C:/ng/anbud/~/@angular/compiler/src/metadata_resolver.js:575:0 <- src/test.ts:24566:19) 
     at CompileMetadataResolver.getNgModuleMetadata (webpack:///C:/ng/anbud/~/@angular/compiler/src/metadata_resolver.js:305:0 <- src/test.ts:24296:58) 
     at RuntimeCompiler._compileComponents (webpack:///C:/ng/anbud/~/@angular/compiler/src/runtime_compiler.js:150:0 <- src/test.ts:37986:47) 
     at RuntimeCompiler._compileModuleAndAllComponents (webpack:///C:/ng/anbud/~/@angular/compiler/src/runtime_compiler.js:78:0 <- src/test.ts:37914:37) 
     at RuntimeCompiler.compileModuleAndAllComponentsSync (webpack:///C:/ng/anbud/~/@angular/compiler/src/runtime_compiler.js:52:0 <- src/test.ts:37888:21)

任何想法如何单元测试组件具有路由？

我想你需要像https://github.com/angular/angular/blob/951ecb4d9024b6b67a326ef2f04eb58a5190f219/modules/%40angular/router/test/integration.spec.ts#L24 –

答

终于能修复它，它是如此简单：

beforeEach(() => addProviders([ 
    { 
     provide: Router, 
     useClass: class { navigate = jasmine.createSpy("navigate"); } 
    }]));

在这里，您可以用茉莉的测试。 'expect（router.navigate）.toHaveBeenCalledWith（['/ success']）;' – GlacialFlames

在2.0.0中，当将其添加到NgModule的提供者部分时也可以使用：提供者：， useClass：class {navigate = jasmine.createSpy（“navigate”）; } }]' – bas

答

尝试增加RouterModule：

import { ROUTER_DIRECTIVES, Router, RouterModule } from '@angular/router'; 

beforeEach(() => { 
     TestBed.configureTestingModule({ 
      providers: [ 
       ... 
       {provide: Router, useClass: RouterModule}, 
     }); 
    });

对于某些组件，使用此方法会导致错误“无法实例化循环依赖！Router（”[ERROR - >]“）：NgModule DynamicTestModule in ./[email protected]:-1”？但是，使用@ masterwok的方法奏效了。 – maia

答

我没有与上述任何方案运气。相反，我跟着文档中推荐的方法：Testing Routed Components

首先，创建任何方法您的组件调用存根路由器：

class RouterStub { 
    navigateByUrl(url: string) { 
    return url; 
    } 
}

然后配置你的测试模块，当你执行以下操作：

TestBed.configureTestingModule({ 
    declarations: [HeaderComponent], 
    providers: [ 
    {provide: Router, useClass: RouterStub} 
    ] 
});

在单元测试中无法解析路由器的所有参数：（？，？，？，？，？，？，？）在单元测试中

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