Using YUI3 within node.js fails for id selector, but not class selector

yui3-dom.js

var result = fs.readFileSync(filename, "binary");
YUI({loadOptional: true})
	.use('nodejs-dom', 'event', 'node', function(Y) {
		var doc = Y.one('doc');
		doc.empty();
		doc.append(result); 
		var idSelector = 'div#test-id';
		var classSelector = 'div.test-case';
		var idContainer = Y.one(idSelector);
		var classContainer = Y.one(classSelector);
		if(idContainer === null){
			console.log('The ID Selector is null');
		}
		if(classContainer !== null){
			console.log('The Class Selector is not null');
		}
});