michael@0: function noop() {}
michael@0: 
michael@0: function run_test() {
michael@0:   var evts;
michael@0: 
michael@0:   var contentHandler = {
michael@0:     attrs: null,
michael@0:     startDocument: function() {
michael@0:       evts.push("startDocument");
michael@0:     },
michael@0:     endDocument: noop,
michael@0: 
michael@0:     startElement: function startElement() {
michael@0:       evts.push("startElement");
michael@0:     },
michael@0: 
michael@0:     endElement: noop,
michael@0:     characters: noop,
michael@0:     processingInstruction: noop,
michael@0:     ignorableWhitespace: noop,
michael@0:     startPrefixMapping: noop,
michael@0:     endPrefixMapping: noop
michael@0:   };
michael@0: 
michael@0:   function XMLDeclHandler(version, encoding, standalone) {
michael@0:     evts.splice(evts.length, 0, version, encoding, standalone);
michael@0:   }
michael@0: 
michael@0:   const nsISAXXMLReader = Components.interfaces.nsISAXXMLReader;
michael@0:   var saxReader = Components.classes["@mozilla.org/saxparser/xmlreader;1"]
michael@0:                             .createInstance(nsISAXXMLReader);
michael@0:   saxReader.contentHandler = contentHandler;
michael@0:   saxReader.declarationHandler = XMLDeclHandler;
michael@0: 
michael@0:   evts = [];
michael@0:   saxReader.parseFromString("<root/>", "application/xml");
michael@0:   do_check_eq(evts.length, 2);
michael@0:   do_check_eq(evts[0], "startDocument");
michael@0:   do_check_eq(evts[1], "startElement");
michael@0: 
michael@0:   evts = [];
michael@0:   saxReader.parseFromString("<?xml version='1.0'?><root/>", "application/xml");
michael@0:   do_check_eq(evts.length, 5);
michael@0:   do_check_eq(evts[0], "startDocument");
michael@0:   do_check_eq(evts[1], "1.0");
michael@0:   do_check_eq(evts[2], "");
michael@0:   do_check_false(evts[3]);
michael@0:   do_check_eq(evts[4], "startElement");
michael@0: 
michael@0:   evts = [];
michael@0:   saxReader.parseFromString("<?xml version='1.0' encoding='UTF-8'?><root/>", "application/xml");
michael@0:   do_check_eq(evts.length, 5);
michael@0:   do_check_eq(evts[0], "startDocument");
michael@0:   do_check_eq(evts[1], "1.0");
michael@0:   do_check_eq(evts[2], "UTF-8");
michael@0:   do_check_false(evts[3]);
michael@0:   do_check_eq(evts[4], "startElement");
michael@0: 
michael@0:   evts = [];
michael@0:   saxReader.parseFromString("<?xml version='1.0' standalone='yes'?><root/>", "application/xml");
michael@0:   do_check_eq(evts.length, 5);
michael@0:   do_check_eq(evts[0], "startDocument");
michael@0:   do_check_eq(evts[1], "1.0");
michael@0:   do_check_eq(evts[2], "");
michael@0:   do_check_true(evts[3]);
michael@0:   do_check_eq(evts[4], "startElement");
michael@0: 
michael@0:   evts = [];
michael@0:   saxReader.parseFromString("<?xml version='1.0' encoding='UTF-8' standalone='yes'?><root/>", "application/xml");
michael@0:   do_check_eq(evts.length, 5);
michael@0:   do_check_eq(evts[0], "startDocument");
michael@0:   do_check_eq(evts[1], "1.0");
michael@0:   do_check_eq(evts[2], "UTF-8");
michael@0:   do_check_true(evts[3]);
michael@0:   do_check_eq(evts[4], "startElement");
michael@0: 
michael@0:   evts = [];
michael@0:   // Not well-formed
michael@0:   saxReader.parseFromString("<?xml encoding='UTF-8'?><root/>", "application/xml");
michael@0:   do_check_eq(evts.length, 1);
michael@0:   do_check_eq(evts[0], "startDocument");  
michael@0: }