[英]angular jasmine test abstract class with other abstract class
我有这个场景问题:
在 Ionic/Angular 项目(ionic v3/Angular v5)中,我有一个组件SuppliedVanContainerComponent ,它扩展了抽象类AbstractLoadingClass ,这个类扩展了另一个抽象类AbstractSubscriberClass 。
AbstractLoadingClass使用LoadingController
一个离子角度服务来显示微调器,它在调用 showLoading 方法时由 SuppliedVanContainerComponent 使用。
问题:当我可以对 jasmine 使用单元测试时,它会向我显示这些错误:
类型错误:无法读取未定义的属性(读取“_getPortal”)
当我用 jasmine.createSpyObj 模拟LoadingController时,它显示了另一个错误,是:
类型错误:this.loading.present 不是函数
我该如何修复它或者我可以使用抽象类进行测试?
提供的VanContainer组件
export class SuppliedVanContainerComponent extends AbstractLoadingClass
constructor(loadingCtrl: LoadingController) {
super(loadingCtrl);
}
ngOnInit(){
this.showLoading();
}
抽象加载类
import {Loading, LoadingController} from 'ionic-angular';
import {LoadingOptions} from 'ionic-angular/umd/components/loading/loading-options';
import {AbstractSubscriberClass} from './abstract-subscriber.class';
export abstract class AbstractLoadingClass extends AbstractSubscriberClass {
private loading: Loading;
protected constructor(public loadingCtrl: LoadingController) {
super();
}
private getCreateLoading(opts?: LoadingOptions) {
return this.loadingCtrl.create(opts);
}
showLoading() {
this.loading = this.getCreateLoading({content: ''});
this.loading.present();
this.loading.setContent('');
}
hideLoading() {
this.loading.dismiss();
}
}
茉莉花测试有误
...
let fakeLoadingController = jasmine.createSpyObj<LoadingController>('LoadingController', {
create: {content: ''},
})
...
{provide: LoadingController, useValue: fakeLoadingController},
感谢@AliF50,我有两个解决方案,我将其发布,第一个解决方案:
....
let fakeLoadingController = jasmine.createSpyObj<LoadingController>('LoadingController', ['create'])
......
providers: [
....
{provide: LoadingController, useValue: fakeLoadingController},
]
....
beforeEach(() => {
fixture = TestBed.createComponent(SuppliedVanContainerComponent);
fakeLoadingController.create.and.returnValue({present: () => null, setContent: () => null, dismiss: () => null});
component = fixture.componentInstance;
fixture.detectChanges();
});
它的工作非常简单,无需使用 LoaderController 进行间谍或测试(只是模拟)。
如果您要使用 Loading 和 spy ,请在此模式下设置:
.....
let fakeLoadingController = jasmine.createSpyObj<LoadingController>('LoadingController', ['create'])
let fakeLoadingObject = jasmine.createSpyObj<Loading>('Loading', ['present', 'setContent', 'dismiss']);
.....
providers: [
...
{provide: LoadingController, useValue: fakeLoadingController},
{provide: Loading, useValue: fakeLoadingObject},
]
....
beforeEach(() => {
fixture = TestBed.createComponent(SuppliedVanContainerComponent);
dailyReportsModel = TestBed.get(DailyReportsModel);
fakeLoadingController.create.and.returnValue(fakeLoadingObject);
component = fixture.componentInstance;
fixture.detectChanges();
});
....
it('test fakeLoadingObject', () => {
expect(fakeLoadingObject.present).toHaveBeenCalled();
})
感谢@AliF50
我认为你嘲笑它是错误的,试试这个:
let fakeLoadingController = jasmine.createSpyObj<LoadingController>('LoadingController', ['create']);
...
{provide: LoadingController, useValue: fakeLoadingController},
...
// before fixture = ..., add this line
fakeLoadingController.create.and.returnValue({ present: () => null, setContent: () => null, dismiss: () => null });
// Or if you want spies on present, setContent, dismiss, you could do
let fakeLoadingObject = jasmine.createSpyObj<any>('FakeLoadingObject', ['present', 'setContent', 'dismiss']);
// then the line above becomes
fakeLoadingController.create.and.returnValue(fakeLoadingObject);
// And then you should have a handle of something like this:
expect(fakeLoadingObject.present).toHaveBeenCalled();
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