gist for medium

test.sinon.js

it('someMethod would be ran with iterator each second', () => {
    const clock = <any>sinon.useFakeTimers(0);
    myService.someMethod();

    clock.tick(2 * 1000);
    expect(logger.logObservable).toHaveBeenCalledTimes(2);
    expect(logger.logInterval).toHaveBeenCalledTimes(1);

    // tell sinon to restore global timers for other tests
    clock.restore();
});