public void CssBorderAggregation()
{
var expectedCss = "border: 1px solid rgba(0, 0, 0, 1)";
var context = BrowsingContext.New(Configuration.Default.WithCss());
var style = new CssStyleDeclaration(context);
style.SetBorderWidth("1px");
style.SetBorderStyle("solid");
style.SetBorderColor("black");
Assert.AreEqual(expectedCss, style.CssText);
}