public void UpdateFieldsAndVariables_CustomLibraryVariable_CopiedToOtherElement()
{
var dom=new HtmlDom(@"<html ><head></head><body>
<div class='bloom-page' id='guid3'>
<p>
<textarea lang='xyz' id='copyOfVTitle' data-book='bookTitle'>tree</textarea>
<textarea lang='xyz' id='1' data-collection='testLibraryVariable'>aa</textarea>
<textarea lang='xyz' id='2' data-collection='testLibraryVariable'>bb</textarea>
</p>
</div>
</body></html>");
var data = new BookData(dom, _collectionSettings, null);
data.UpdateVariablesAndDataDivThroughDOM();
var textarea2 = dom.SelectSingleNodeHonoringDefaultNS("//textarea[@id='2']");
Assert.AreEqual("aa", textarea2.InnerText);
}