public void Test202()
{
using var htmlParser = new HtmlParser();
var elmRef = new ElementReference(Guid.NewGuid().ToString());
var elm = (IElement)htmlParser.Parse($"<p {Htmlizer.ELEMENT_REFERENCE_ATTR_NAME}=\"ASDF\" />").First();
Should.Throw <ActualExpectedAssertException>(() => elmRef.ShouldBeElementReferenceTo(elm));
var elmWithoutRefAttr = (IElement)htmlParser.Parse($"<p />").First();
Should.Throw <ActualExpectedAssertException>(() => elmRef.ShouldBeElementReferenceTo(elmWithoutRefAttr));
}