public void FromAmounts_CalculatesPercentage()
{
DecimalPercentage eightyPercent = DecimalPercentage.FromAmounts(60L, 75L);
Assert.That(eightyPercent.Value, Is.EqualTo(80m));
Assert.That(eightyPercent.Fraction, Is.EqualTo(0.8m));
DecimalPercentage tenPercent = DecimalPercentage.FromAmounts(10m, 100m);
Assert.That(tenPercent.Value, Is.EqualTo(10m));
Assert.That(tenPercent.Fraction, Is.EqualTo(0.1m));
DecimalPercentage thousandPercent = DecimalPercentage.FromAmounts(100m, 10m);
Assert.That(thousandPercent.Value, Is.EqualTo(1000m));
Assert.That(thousandPercent.Fraction, Is.EqualTo(10m));
}
public static DecimalPercentage AsPercentOf(this decimal given, decimal total)
{
return(DecimalPercentage.FromAmounts(given, total));
}
public void FromAmount_ZeroTotal_Exception()
{
Assert.That(() => DecimalPercentage.FromAmounts(10, 0), Throws.ArgumentException);
}