问题描述
如何为延迟加载模块编写单元测试用例
import { routes } from './app-routing';
@NgModule({
imports: [RouterModule.forRoot(routes)],exports: [RouterModule]
})
export class AppRoutingModule { }
route:export const路由:Routes = [ { 路径:“, redirectTo:'home', pathMatch:“已满” }, { 路径:“家”, loadChildren:()=> import('./ home / home.module')。then(m => m.HomeModule) }, { 路径:“ qwe”, loadChildren:()=> import('./ path2 / qwe.module')。then(m => m.Qwemodule) }, { 路径:“ abc”, loadChildren:()=> import('./ path1 / abc.module')。then(m => m.Abcmodule) } ];
规格文件:
describe('Routes',() => {
it(`should load 4 Routes`,async(() => {
console.log(routes.length.toString());
var a=routes.length;
expect(a).toEqual(4);
}));
});
describe('Routes load child',() => {
let location: Location;
let router: Router;
beforeEach(() => {
Testbed.configureTestingModule({
imports:[
RouterTestingModule.withRoutes(routes),RouterTestingModule,HttpClientModule,HomeModule,Qwemodule,Abcmodule
],providers: [{provide: APP_BASE_HREF,useValue: '/'}]
});
});
it(`navigate to route /path loades module`,fakeAsync(() => {
router = Testbed.get(Router);
routes.forEach(route => {
location = Testbed.get(Location);
router.navigate([route.path]);
tick(50);
let t= route.loadChildren;
expect(route.loadChildren).not.toBeNull;
expect(location.path()).toBe('/'+route.path);
});
}));
});
它破坏了路由器文件在spc中的覆盖范围,但在代码覆盖率中不覆盖loadchild,因此如何实现100%的代码覆盖率是20%
解决方法
您应该为此使用 NgModuleFactoryLoader 和 Location 类
it('should navigate to lazy module',fakeAsync(() => {
let router = TestBed.get(Router);
router.initialNavigation();
//Used to load ng module factories.
let loader = TestBed.get(NgModuleFactoryLoader);
let location = TestBed.get(Location);
// sets up stubbedModules.
loader.stubbedModules = {
'./path/module_name.module#Your_lazymodule': Your_lazymodule,};
router.resetConfig([
{ path: 'instructor',loadChildren: './path/module_name.module#Your_lazymodule' },]);
router.navigateByUrl('/URL');
tick();
expect(location.path()).toBe('/URL');
}));