public ICalculateIbu GetCalculator(IIbuStrategy ibuStrategy)
{
ICalculateIbu myCalculator = new IbuCalculation();
myCalculator.IbuCalculationType = ibuStrategy;
return(myCalculator);
}
public double CalculateIbus(IbuCalculation ibuDetails)
{
double gravityAdjustment = 0;
if (ibuDetails.BatchOriginalGravity > 1.050)
{
gravityAdjustment = ibuDetails.BatchOriginalGravity - 1.050 / 0.2;
}
var utilization = 18.11 + (13.86 * Math.Tanh((ibuDetails.BoilTimeInMinutes - 31.32) / 18.27));
var ibus = (ibuDetails.HopeQuantityInOunces * utilization / 100 * ibuDetails.AlphaAcids / 100 * 7462) / (ibuDetails.BatchVolumeInGallons * (1 + gravityAdjustment));
return(ibus);
}
public double CalculateIbus(IbuCalculation ibuDetails)
{
if (ibuDetails.BatchVolumeInGallons > 0 && ibuDetails.AlphaAcids > 0 && ibuDetails.HopeQuantityInOunces > 0)
{
var milligramsLiterOfAA = (ibuDetails.AlphaAcids / 100 * ibuDetails.HopeQuantityInOunces * 7490) / ibuDetails.BatchVolumeInGallons;
var bignessFactor = 1.65 * System.Math.Pow(0.000125, (ibuDetails.BatchOriginalGravity - 1));
var boilTimeFactor = (1 - System.Math.Pow(2.71828, (-0.04 * ibuDetails.BoilTimeInMinutes))) / 4.15;
var utilization = ibuDetails.BatchOriginalGravity * boilTimeFactor;
var ibus = utilization * milligramsLiterOfAA;
return(ibus);
}
else
{
throw new ArgumentOutOfRangeException("BatchVolumeInGallons", "Batch Volume, Alpha Acids And Hop Quantity Must All Be Greater Than Zero!");
}
}
public void Interpret_OriginalGravity_To_Brix_Wrong_Type_Causes_Exception()
{
ICalculateIbu calculator = new IbuCalculation.IbuCalculation();
calculator.AlphaAcids = 10;
calculator.BatchOriginalGravity = 1.05;
calculator.BatchVolumeInGallons = 5;
calculator.BoilTimeInMinutes = 60;
calculator.BoilVolumeInGallons = 6;
calculator.HopeQuantityInOunces = 1;
OriginalGravityToBrixCalculatedTypeInterpretor interpretor = new OriginalGravityToBrixCalculatedTypeInterpretor();
try {
var brixValue = interpretor.Interpret((calculator as Calculator));
}
catch (Exception exception) {
Assert.IsInstanceOfType(exception, typeof(InvalidOperationException));
}
}
