public void TestUnderline()
{
CT_Font ctFont = new CT_Font();
CT_UnderlineProperty underlinePropr = ctFont.AddNewU();
underlinePropr.val = (ST_UnderlineValues.single);
ctFont.SetUArray(0, underlinePropr);
XSSFFont xssfFont = new XSSFFont(ctFont);
Assert.AreEqual(FontUnderlineType.Single, xssfFont.Underline);
xssfFont.SetUnderline(FontUnderlineType.Double);
Assert.AreEqual(1,ctFont.u.Count);
Assert.AreEqual(ST_UnderlineValues.@double, ctFont.GetUArray(0).val);
xssfFont.SetUnderline(FontUnderlineType.DoubleAccounting);
Assert.AreEqual(1,ctFont.u.Count);
Assert.AreEqual(ST_UnderlineValues.doubleAccounting, ctFont.GetUArray(0).val);
}