public void Binary_functions_should_throw_for_null_argument()
{
var x1 = new BigDecimal(1.1);
((Action)(() => x1.Add(null))).ShouldThrow <NullReferenceException>();
((Action)(() => x1.Sub(null))).ShouldThrow <NullReferenceException>();
((Action)(() => x1.Mul(null))).ShouldThrow <NullReferenceException>();
((Action)(() => x1.Div(null))).ShouldThrow <NullReferenceException>();
((Action)(() => x1.Pow(null))).ShouldThrow <NullReferenceException>();
((Action)(() => x1.Dim(null))).ShouldThrow <NullReferenceException>();
}