Below is a method written in the service called CapacitorManager:
backButtonHandler() {
return () => {
const activeModalInstance = this.dataService.getItem(Constants.activeModalInstanceKey);
const doesActiveModalExist = activeModalInstance !== -1;
if (doesActiveModalExist) {
activeModalInstance.close();
}
else {
this.location.back();
}
}
}
This method should invoke the close method within the object activeModalInstance (where activeModalInstance is an instance of NgbModal) if there is an activeModalInstance inside the instance referred to by dataService.getItem(). The getItem method has already been mocked to return an object including the close method.
fdescribe('CapacitorManager', () => {
let service: CapacitorManager;
let dataService: DataService;
let location: Location;
let dataServiceStub: Partial<DataService>;
beforeEach(async(() => {
dataServiceStub = {
getItem: () => {
return {
close: () => {
}
}
}
}
TestBed.configureTestingModule({
providers: [
{ provide: Location, useClass: SpyLocation },
{ provide: DataService, useValue: dataServiceStub },
CapacitorManager
],
imports: [
RouterTestingModule
]
}).compileComponents().then(() => {
service = TestBed.inject(CapacitorManager);
dataService = TestBed.inject(DataService);
location = TestBed.inject(Location);
});
}));
afterEach(() => {
service = null;
});
it('should create the component', () => {
expect(service).toBeTruthy();
});
it('should backButtonHandler call activeModal in case activeModalInstance exists', () => {
const activeModalInstance = dataService.getItem("activeModal");
spyOn(activeModalInstance, "close");
service.backButtonHandler();
expect(activeModalInstance.close).toHaveBeenCalled();
expect(location.back).not.toHaveBeenCalled();
});
});
The last test case is where I am facing the issue of Expected a spy, but got Function. How can I pass this test case successfully?