import { AuthGuard } from './auth.guard';
import * as moment from 'moment';

describe('AuthGuard', () => {

    let router;
    let authService;
    let notificationService;

    beforeEach(() => {
        router = jasmine.createSpyObj(['navigate']);
        authService = jasmine.createSpyObj(['getCurrentUser']);
        notificationService = jasmine.createSpyObj(['openSnackBar']);
    });

    it('create an instance', () => {
        const guard = new AuthGuard(router, notificationService, authService);
        expect(guard).toBeTruthy();
    });

    it('returns false if user is null', () => {
        authService.getCurrentUser.and.returnValue(null);
        const guard = new AuthGuard(router, notificationService, authService);

        const result = guard.canActivate();

        expect(result).toBe(false);
    });

    it('redirects to login if user is null', () => {
        authService.getCurrentUser.and.returnValue(null);
        const guard = new AuthGuard(router, notificationService, authService);

        guard.canActivate();

        expect(router.navigate).toHaveBeenCalledWith(['auth/login']);
    });

    it('does not display expired notification if user is null', () => {
        authService.getCurrentUser.and.returnValue(null);
        const guard = new AuthGuard(router, notificationService, authService);

        guard.canActivate();

        expect(notificationService.openSnackBar).toHaveBeenCalledTimes(0);
    });

    it('redirects to login if user session has expired', () => {
        const user = { expiration: moment().add(-1, 'minutes') };
        authService.getCurrentUser.and.returnValue(user);
        const guard = new AuthGuard(router, notificationService, authService);

        guard.canActivate();

        expect(router.navigate).toHaveBeenCalledWith(['auth/login']);
    });

    it('displays notification if user session has expired', () => {
        const user = { expiration: moment().add(-1, 'seconds') };
        authService.getCurrentUser.and.returnValue(user);
        const guard = new AuthGuard(router, notificationService, authService);

        guard.canActivate();

        expect(notificationService.openSnackBar)
            .toHaveBeenCalledWith('Your session has expired');
    });

    it('returns true if user session is valid', () => {
        const user = { expiration: moment().add(1, 'minutes') };
        authService.getCurrentUser.and.returnValue(user);
        const guard = new AuthGuard(router, notificationService, authService);

        const result = guard.canActivate();

        expect(result).toBe(true);
    });

});