public void DoesCalculateCorrectDifference()
        {
            var date1 = DateTime.Now;
            var date2 = date1.AddSeconds(_compareTime);

            var mockTime = new Mock <ITimeService>();

            mockTime.Setup(x => x.GetCurrentTime()).Returns(date2);

            var elapseService = new ElapsedService(mockTime.Object);

            var difference = elapseService.GetElapsedTime(date1);

            ((int)difference.TotalSeconds).Should().Be(_compareTime);
        }