public void TestSpeedConvertToFunction()
{
var speedA = new Speed <Feet, Hours, Int32>(120);
var speedB = speedA.ConvertTo <Inches, Minutes, Int32>();
Assert.Equal(Convert.ToDecimal(24.0), speedB.SpeedValue);
Assert.Same(typeof(Inches), speedB.LengthUnitOfMeasure.GetType());
Assert.Same(typeof(Minutes), speedB.DurationUnitOfMeasure.GetType());
var speedC = new Speed <Feet, Hours, Int32>(120);
var speedD = speedC.ConvertTo <decimal>();
Assert.Equal(120, speedD.SpeedValue);
Assert.Same(typeof(decimal), speedD.SpeedValue.GetType());
}