public void Should_Calculate_Time_Spent_On_ParkingSpace() { var parkingSpace = new ParkingSpace(ParkingSpaceType.Car); parkingSpace.Occupy(2); Thread.Sleep(2000); //2seg parkingSpace.Release(); var expected = (double)2000 / 60000; //ms to min Assert.Equal(expected.ToString("0.##"), parkingSpace.CalculateTimeSpent().ToString("0.##")); }