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import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
import { discardPeriodicTasks, fakeAsync, TestBed, tick } from '@angular/core/testing';
import { configureTestBed } from '~/testing/unit-test-helper';
import { FeatureTogglesService } from './feature-toggles.service';
describe('FeatureTogglesService', () => {
let httpTesting: HttpTestingController;
let service: FeatureTogglesService;
configureTestBed({
providers: [FeatureTogglesService],
imports: [HttpClientTestingModule]
});
beforeEach(() => {
service = TestBed.inject(FeatureTogglesService);
httpTesting = TestBed.inject(HttpTestingController);
});
afterEach(() => {
httpTesting.verify();
});
it('should be created', () => {
expect(service).toBeTruthy();
});
it('should fetch HTTP endpoint once and only once', fakeAsync(() => {
const mockFeatureTogglesMap = [
{
rbd: true,
mirroring: true,
iscsi: true,
cephfs: true,
rgw: true
}
];
service
.get()
.subscribe((featureTogglesMap) => expect(featureTogglesMap).toEqual(mockFeatureTogglesMap));
tick();
// Second subscription shouldn't trigger a new HTTP request
service
.get()
.subscribe((featureTogglesMap) => expect(featureTogglesMap).toEqual(mockFeatureTogglesMap));
const req = httpTesting.expectOne(service.API_URL);
req.flush(mockFeatureTogglesMap);
discardPeriodicTasks();
}));
});
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