Add the following new tests:

Add the following new tests:
DOMCharacterData::appendData() with no arguments.
DOMCharacterData::deleteData() with count exceeding string size.
DOMCharacterData::deleteData() with no arguments.
DOMCharacterData::deleteData() with offset exceeding string size.
DOMCharacterData::insertData() with no arguments.
DOMCharacterData::replaceData() with no arguments.
DOMComment::__construct() with more arguments than acceptable.
DOMDocumentFragment::__construct().
DOMDocumentFragment::__construct() with too many errors.
DOMDocumentFragment::appendXML() with no arguments.
DOMDocumentFragment::appendXML() with children with properties.