Added support for class selectors and class attribute selectors on XML documents. Fixes jQuery bug #4167.

test/data/test.js

@@ -1,3 +1,3 @@
-foobar = "bar";
+var foobar = "bar";
 jQuery('#ap').html('bar');
 ok( true, "test.js executed");

test/data/test2.html

@@ -1,5 +1,5 @@
 <script type="text/javascript">
-testFoo = "foo";
+var testFoo = "foo";
 jQuery('#foo').html('foo');
 ok( true, "test2.html executed" );
 </script>

test/data/with_fries.xml

@@ -6,7 +6,7 @@
 		<jsconf xmlns="http://www.example.com/ns1">
 			<response xmlns:ab="http://www.example.com/ns2">
 				<meta>
-					<component id="seite1">
+					<component id="seite1" class="component">
 						<properties xmlns:cd="http://www.example.com/ns3">
 							<property name="prop1">
 								<thing />

test/unit/selector.js

@@ -35,10 +35,12 @@ test("element", function() {
 
 if ( location.protocol != "file:" ) {
 	test("XML Document Selectors", function() {
-		expect(5);
+		expect(7);
 		stop();
 		jQuery.get("data/with_fries.xml", function(xml) {
 			equals( jQuery("foo_bar", xml).length, 1, "Element Selector with underscore" );
+			equals( jQuery(".component", xml).length, 1, "Class selector" );
+			equals( jQuery("[class*=component]", xml).length, 1, "Attribute selector for class" );
 			equals( jQuery("property[name=prop2]", xml).length, 1, "Attribute selector with name" );
 			equals( jQuery("[name=prop2]", xml).length, 1, "Attribute selector with name" );
 			equals( jQuery("#seite1", xml).length, 1, "Attribute selector with ID" );