import { waitForAsync, ComponentFixture, TestBed } from '@angular/core/testing';
import { LoaderComponent } from './loader.component';
import { LoaderService } from './loader.service';
import { Subscription } from 'rxjs';

describe('LoaderComponent', () => {
	let component: LoaderComponent;
	let fixture: ComponentFixture<LoaderComponent>;
	let loader: LoaderService;

	beforeEach(waitForAsync(() => {
		TestBed.configureTestingModule({
			declarations: [LoaderComponent],
		}).compileComponents();
	}));

	beforeEach(() => {
		fixture = TestBed.createComponent(LoaderComponent);
		component = fixture.componentInstance;
		loader = TestBed.inject(LoaderService);
		component.loaderSubscription = new Subscription();
		component.showLoader = false;
		fixture.detectChanges();
	});

	it('should call ngOnInit', done => {
		component.loaderSubscription = undefined;
		component.ngOnInit();
		loader.startLoader();
		expect(component.loaderSubscription).toBeTruthy();
		done();
	});

	it('should call ngOnDestroy', () => {
		component.loaderSubscription.unsubscribe = jest.fn();
		component.ngOnDestroy();
		expect(component.loaderSubscription.unsubscribe).toHaveBeenCalled();
	});

	it('should create', () => {
		expect(component).toBeTruthy();
	});
});