public void FinalGravityCalculation_Passes()
{
ICalculateFinalGravityFactory finalGravityFactory = new CalculateFinalGravityFactory();
ICalculateFinalGravity finalGravityCalculator = finalGravityFactory.GetCalculator(new FinalGravityStrategy());
finalGravityCalculator.StartingVolume = 5;
finalGravityCalculator.FinalVolume = 4.5;
finalGravityCalculator.OriginalGravity = 1.05;
var finalGravity = finalGravityCalculator.Calculate();
Assert.AreEqual(1.05556, Math.Round(finalGravity, 5));
}
public double CalculateFinalGravity(ICalculateFinalGravity finalGravityDetails)
{
if (finalGravityDetails.FinalVolume <= 0)
{
throw new ArgumentOutOfRangeException("FinalVolume", "Final Volume must be greater than zero");
}
if (finalGravityDetails.StartingVolume <= 0)
{
throw new ArgumentOutOfRangeException("StartingVolume", "Starting Volume must be greater than zero");
}
var finalGravity = 1 + (finalGravityDetails.StartingVolume * (System.Math.Abs(1 - finalGravityDetails.OriginalGravity) * 1000) / finalGravityDetails.FinalVolume / 1000);
return(finalGravity);
}