public void RemoveSingleForm_HasForm_Removed()
{
var htmlDom = new HtmlDom();
var data = new BookData(htmlDom, new CollectionSettings(), null);
data.Set("1","one","en");
var data2 = new BookData(htmlDom, new CollectionSettings(), null);
data2.RemoveSingleForm("1","en");
Assert.IsNull(data2.GetVariableOrNull("1", "en"));
}