如何在angular中模拟服务类的属性(Jasmine/Karma)
我试图从我的服务中模拟currentOrganizationMessageSource,但出现以下错误: this.OrganizationService.currentOrganizationMessageSource.subscribe不是函数 我尝试使用spyOnProperty,但得到的结果是currentOrganizationMessageSource不是属性 类别:如何在angular中模拟服务类的属性(Jasmine/Karma),angular,jasmine,angular6,karma-jasmine,spy,Angular,Jasmine,Angular6,Karma Jasmine,Spy,我试图从我的服务中模拟currentOrganizationMessageSource,但出现以下错误: this.OrganizationService.currentOrganizationMessageSource.subscribe不是函数 我尝试使用spyOnProperty,但得到的结果是currentOrganizationMessageSource不是属性 类别: export class OrganizationEditComponent implements OnInit {
export class OrganizationEditComponent implements OnInit {
feedback: any = {};
appOrgs: OrganizationDataModel;
organizationLocationTableTitle: string;
constructor(
public route: ActivatedRoute,
private router: Router,
private orgService: OrganizationService) {
}
ngOnInit() {
this.loadOrganisation();
}
private loadOrganisation()
{
this.orgService.currentOrganizationMessageSource.subscribe(
org => this.appOrgs = org);
this
.route
.params
.pipe(
map(p => p.id),
switchMap(id => {
if (id === 'new') { return of(this.appOrgs); }
if (id != null) {
return this.orgService.findByOrganizationsId(id);
}
})
)
.subscribe(orgs => {
this.orgService.changeMessage(orgs);
this.appOrgs = orgs;
this.feedback = {};
},
err => {
this.feedback = {type: 'warning', message:'Error'};
}
);
}
服务:
export class OrganizationService {
private OrganizationMessageSource = new BehaviorSubject( new OrganizationDataModel());
currentOrganizationMessageSource = this.OrganizationMessageSource.asObservable();
changeMessage(appOrganization: appOrganizationDataModel) {
this.appOrganizationMessageSource.next(appOrganization);
}
}
测试规格类别:
fdescribe('OrganizationEditComponent', () => {
let component: OrganizationEditComponent;
let fixture: ComponentFixture<OrganizationEditComponent>;
let activatedRoutes: any = {};
beforeEach(async(async () => {
const OrganizationService: OrganizationService = jasmine.createSpyObj('OrganizationService', ['currentOrganizationMessageSource']);
await TestBed.configureTestingModule({
declarations: [ OrganizationEditComponent ],
providers: [
{ provide: ActivatedRoute, useValue: activatedRoutes },
{ provide: Router, useValue: {url: ''}},
{ provide: OrganizationService, useValue: OrganizationService },
],
imports: [ FormsModule ] ,
schemas: [CUSTOM_ELEMENTS_SCHEMA, NO_ERRORS_SCHEMA]
})
.compileComponents();
// component.ngOnInit();
fixture = TestBed.createComponent(OrganizationEditComponent);
component = fixture.componentInstance;
fixture.detectChanges();
}));
function givenServicesAreMocked() {
const spy = TestBed.get(OrganizationService);
// let mockService = jasmine.createSpyObj(OrganizationService, ['currentOrganizationMessageSource']);
// mockService.currentOrganizationMessageSource.and.returnValue('');
// spyOnProperty(OrganizationService, "OrganizationMessageSource").and.returnValue([]);
// OrganizationService.currentOrganizationMessageSource = () => {
// return [];
// };
}
});
fddescripe('OrganizationEditComponent',()=>{
let组件:OrganizationEditComponent;
let夹具:组件夹具;
让activatedRoutes:any={};
beforeach(异步(异步()=>{
const OrganizationService:OrganizationService=jasmine.createSpyObj('OrganizationService',['currentOrganizationMessageSource']);
等待TestBed.configureTestingModule({
声明:[OrganizationEditComponent],
供应商:[
{提供:ActivatedRoute,useValue:activatedRoutes},
{提供:路由器,useValue:{url:''}},
{提供:OrganizationService,useValue:OrganizationService},
],
导入:[FormsModule],
模式:[自定义元素模式,无错误模式]
})
.compileComponents();
//组件。ngOnInit();
fixture=TestBed.createComponent(OrganizationEditComponent);
组件=fixture.componentInstance;
fixture.detectChanges();
}));
函数givenServicesRemocked(){
const spy=TestBed.get(OrganizationService);
//让mockService=jasmine.createSpyObj(OrganizationService,['currentOrganizationMessageSource']);
//mockService.currentOrganizationMessageSource.and.returnValue(“”);
//spyOnProperty(OrganizationService,“OrganizationMessageSource”)。和.returnValue([]);
//OrganizationService.currentOrganizationMessageSource=()=>{
//返回[];
// };
}
});
使用操作员的
import { of } from 'rxjs';
在使用前定义orgService:
let orgService : KhojiOrganizationService;
将此添加到beforeach:
orgService= TestBed.get(KhojiOrganizationService);
测试用例:
it('should fetch data', () => {
spyOn(orgService, 'currentkhojiOrganizationMessageSource').and.returnValue(of('test Data'));
component.ngOnInit();
expect(component.appOrgs).toEqual('test Data');
});
例如,我在
运算符的内部传递字符串。您可以在其中传递对象
/对象数组
,并根据您的数据模型更改期望值。您可以基于
从'ts mockry'导入{Mock,mockry};
接口存根{
[键:字符串]:任意;
}
导出函数createMockService(服务:类型,存根?:存根){
mockry.configure('jasmine');
const mockedFunctions=stubs?stubs:{};
如果(!存根){
for(const key in service.prototype){
mockedFunctions[key]=()=>null;
}
}
返回{
提供:服务,
useValue:Mock.of(mockedFunctions)
};
}
那么你可以这样使用它
beforeach(异步(()=>{
TestBed.configureTestingModule({
导入:[SomeModule,OtherModule],
声明:[SomeComponent,MockComponent(OtherComponent)],
提供者:[createMockService(OrganizationService)]
}).compileComponents();
}));
这与您的问题无关,但请注意MockComponent,它是封装您的karma测试的正确方法,因此只允许对您的组件进行测试,而不使用[CUSTOM_ELEMENTS_SCHEMA,NO_ERRORS_SCHEMA],这是一种不好的做法
下面是一个示例,您需要使用of rxjs操作符模拟返回值
从'rxjs'导入{of};
const RESULT=[{id:1,名称:“test”},{id:2,名称:“toto”}];
beforeach(异步(()=>{
TestBed.configureTestingModule({
导入:[SomeModule,OtherModule],
声明:[SomeComponent,MockComponent(OtherComponent)],
提供者:[createMockService(OrganizationService,{yourMethod:()=>of(RESULTS)}]
}).compileComponents();
}));
你的模拟服务总是很容易用这种方式进行模拟。你的想法是正确的,但是你不能用createSpyObj
来模拟属性,而只能用方法
import { of } from 'rxjs';
....
// the 2nd argument is for public methods, not properties
const OrganizationService: OrganizationService = jasmine.createSpyObj('OrganizationService', ['changeMessage']);
// attach currentOrganizationMesageSource as a property to OrganizationService and mock the value
OrganizationService.currentOrganizationMessageSource = of(/* Mock the value here */);
// keep everything else the same
希望这能奏效
您还需要正确模拟激活的路由
和路由器
。对于路由器,只需将RouterTestingModule
添加到imports
数组中即可。它由Angular提供,在测试注入路由器的组件/服务时提供帮助。尝试spyOn(component.orgService,'currentkhojiOrganizationMessageSource')。和.returnValue(of({}))
returnValue应该是可见的,注意
的,我想您需要在您的constructor@KamranKhatti首先,如果通过公开直接引用component.orgService,那么如果我用模拟值替换component.orgService,我的测试类会说类中不存在orgService(让orgService:any={})比我get currentOrganizationMessageSource()方法不存在实际上此服务KhojiOrganizationService在其构造函数中有另一个服务。因此,当我像这样定义TestBad时,让服务:KhojiOrganizationService=new KhojiOrganizationService(http);和orgService=TestBed.get(服务);然后我得到以下失败的错误:Uncaught(承诺中):错误:StaticInjectorError[[object]]:如下定义:let orgService:KhojiOrganizationService;然后使用测试床
,如回答中所述。