我是 ionic 2 单元测试的初学者.我遵循了 Angular 2 文档(https://angular.io/docs/ts/latest/guide/testing.html) 用 karma 和 jasmine 测试我的 ionic 2 应用程序.
I am a beginner to ionic 2 unit testing. I followed angular 2 documentation (https://angular.io/docs/ts/latest/guide/testing.html) to test my ionic 2 application with karma and jasmine.
但现在我陷入了一个名为
But now I am stuck in an error called
'无法读取未定义的属性'_getPortal'
'Cannot read property '_getPortal' of undefined'
这是我的 LocationSearchModal.ts
文件
import { Component } from '@angular/core';
import { NavController, ViewController } from 'ionic-angular';
import { Location } from '../../services/domain/Location';
import { LocationService } from '../../services/LocationService';
import { LoadingController } from 'ionic-angular';
@Component({
selector: 'location-search-modal',
templateUrl: 'location-search-modal.html'
})
export class LocationSearchModal {
locationList: Array<Location> = new Array<Location>();
selectedLocation: number;
temp: any = "test";
constructor(public navCtrl: NavController, public locationService: LocationService, public viewController: ViewController, public loadingController: LoadingController) {
this.filterLocationsForString();
}
filterLocations(event: any): void {
const searchString: string = event.target.value;
this.filterLocationsForString(searchString);
console.log(this.filterLocationsForString(searchString));
}
filterLocationsForString(searchString?: string) {
let loader = this.loadingController.create({
content: "loading"
});
loader.present();
this.locationService.getLocationsForLikeSearchString(searchString)
.subscribe((result) => {
loader.dismissAll();
this.locationList = result
});
console.log(this.locationList);
}
closeLocationSearch() {
this.locationService.getLocationById(this.selectedLocation)
.subscribe((location) => this.viewController.dismiss(location[0]));
}
}
我在那里使用了名为 locationService.ts 的服务,这就是该服务
and I used service called locationService.ts there and this is that service
import { Injectable } from '@angular/core';
import { Location } from './domain/Location';
import { DatabaseAccessor } from '../database/DatabaseAccessor';
import { Observable } from 'rxjs/Rx';
@Injectable()
export class LocationService {
locationList:Array<Location> = new Array<Location>();
constructor(public databaseAccessor: DatabaseAccessor) {}
getLocationsForLikeSearchString(searchString: string) : Observable<Array<Location>> {
const searchValue = (searchString == null) ? '%' : searchString.trim() + '%';
return <Observable<Array<Location>>> Observable.fromPromise(this.databaseAccessor.runSelectQuery(Location, new Location(), 'WHERE name LIKE ?', [searchValue]));
}
getLocationById(id: number): Observable<Location> {
return <Observable<Location>> Observable.fromPromise(this.databaseAccessor.runSelectQuery(Location, new Location(), 'WHERE id = ?', [id]));
}
saveLocations(locations: Array<Location>){
this.databaseAccessor.runInsertBatchQuery(Location.prototype, locations);
}
}
最后,我写了一个 spec.ts
文件来进行单元测试,就是这样,
Finally, I wrote a spec.ts
file to unit testing and here is that,
import { ComponentFixture, async } from '@angular/core/testing';
import { LocationSearchModal } from './LocationSearchModal';
import { LocationService } from '../../services/LocationService';
import { TestUtils } from '../../test';
import { TestBed } from '@angular/core/testing';
import { App, NavController, Platform, Config, Keyboard, Form, IonicModule, GestureController, ViewController, LoadingController } from 'ionic-angular';
import { ConfigMock } from '../../mocks';
import { TranslateModule } from 'ng2-translate';
import { DatabaseAccessor } from '../../database/DatabaseAccessor';
let comp: LocationSearchModal;
let fixture: ComponentFixture<LocationSearchModal>;
let instance: any = null;
describe('LocationSearchModal', () => {
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [LocationSearchModal], // declare the test component
providers: [App, Platform, Form, Keyboard, NavController, GestureController, LoadingController, LocationService, DatabaseAccessor,
{ provide: ViewController, useClass: class { ViewController = jasmine.createSpy("viewController"); } },
{ provide: Config, useClass: ConfigMock },
],
imports: [
IonicModule,
TranslateModule.forRoot(),
],
});
fixture = TestBed.createComponent(LocationSearchModal);
comp = fixture.componentInstance;
}));
console.log(comp);
it('Testing Location Component', () => {
expect(comp.temp).toBe('test');
})
});
当我运行以下错误来自终端.(我的单元测试配置是正确的,我用另一个简单的 .spec.ts 文件对其进行了测试)
when I am running the following error comes from the terminal. (my unit testing configuration are correct and I tested it with another simple .spec.ts file)
错误
SUMMARY:
✔ 1 test completed
✖ 1 test failed
FAILED TESTS:
LocationSearchModal
✖ Testing Location Component
Chrome 54.0.2840 (Linux 0.0.0)
Failed: Error in ./LocationSearchModal class LocationSearchModal_Host - inline template:0:0 caused by: Cannot read property '_getPortal' of undefined
TypeError: Cannot read property '_getPortal' of undefined
at App.present (webpack:/media/dilanka/Stuff/CODE%20BASE/Inspection/Unit%20Testing/Inspection-Rewrite/~/ionic-angular/components/app/app.js:78:0 <- src/test.ts:2091:35)
at Loading.present (webpack:/media/dilanka/Stuff/CODE%20BASE/Inspection/Unit%20Testing/Inspection-Rewrite/~/ionic-angular/components/loading/loading.js:31:0 <- src/test.ts:38779:26)
at LocationSearchModal.filterLocationsForString (webpack:/media/dilanka/Stuff/CODE%20BASE/Inspection/Unit%20Testing/Inspection-Rewrite/src/pages/location-search/LocationSearchModal.ts:9:4184 <- src/test.ts:18993:4170)
at new LocationSearchModal (webpack:/media/dilanka/Stuff/CODE%20BASE/Inspection/Unit%20Testing/Inspection-Rewrite/src/pages/location-search/LocationSearchModal.ts:9:3407 <- src/test.ts:18993:3391)
at new Wrapper_LocationSearchModal (/DynamicTestModule/LocationSearchModal/wrapper.ngfactory.js:7:18)
at _View_LocationSearchModal_Host0.createInternal (/DynamicTestModule/LocationSearchModal/host.ngfactory.js:16:35)
at _View_LocationSearchModal_Host0.AppView.create (webpack:/media/dilanka/Stuff/CODE%20BASE/Inspection/Unit%20Testing/Inspection-Rewrite/~/@angular/core/src/linker/view.js:84:0 <- src/test.ts:52350:21)
at _View_LocationSearchModal_Host0.DebugAppView.create (webpack:/media/dilanka/Stuff/CODE%20BASE/Inspection/Unit%20Testing/Inspection-Rewrite/~/@angular/core/src/linker/view.js:294:0 <- src/test.ts:52560:44)
at ComponentFactory.create (webpack:/media/dilanka/Stuff/CODE%20BASE/Inspection/Unit%20Testing/Inspection-Rewrite/~/@angular/core/src/linker/component_factory.js:152:0 <- src/test.ts:32035:36)
at initComponent (webpack:/media/dilanka/Stuff/CODE%20BASE/Inspection/Unit%20Testing/Inspection-Rewrite/~/@angular/core/bundles/core-testing.umd.js:855:0 <- src/test.ts:7416:53)
我终于解决了这个问题.我使用了一个模拟并在该模拟中定义了所需的方法.然后它工作:)
这是一个模拟示例.
I Solved this problem finally. I used a mock and defined required methods in that mock. Then It works :)
here is an example for a mock.
export class ViewControllerMock {
public _setHeader(): any { return {} };
public _setNavbar(): any { return {} };
public _setIONContent(): any { return {} };
public _setIONContentRef(): any { return {} };
}
然后必须将该模拟导入您的 .spec.ts
文件,如下所示
then have to import that mock into your .spec.ts
file as follows
import {ViewControllerMock} from '../../mocks';
然后必须在 spec.ts
文件中的提供程序中定义该模拟,如下所示
then have to define that mock in your providers in spec.ts
file as follows
providers: [{ provide: ViewController, useClass: ViewControllerMock}],
这篇关于无法读取离子 2 单元测试中未定义的属性“_getPortal"的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持html5模板网!