public void CanSetScale()
{
var hbm = new HbmColumn();
var mapper = new ColumnMapper(hbm, "aColumn");
mapper.Scale(3);
hbm.scale.Should().Be("3");
mapper.Executing(m => m.Scale(0)).NotThrows();
mapper.Executing(m => m.Scale(-1)).Throws <ArgumentOutOfRangeException>();
}