Merge pull request #419 from rwldrn/9630

Unit tests assert that .contents().hasClass() works as expected. Fixes #9630

src/attributes.js

@@ -146,7 +146,7 @@ jQuery.fn.extend({
 	hasClass: function( selector ) {
 		var className = " " + selector + " ";
 		for ( var i = 0, l = this.length; i < l; i++ ) {
-			if ( (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) > -1 ) {
+			if ( this[i].nodeType === 1 && (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) > -1 ) {
 				return true;
 			}
 		}

test/unit/attributes.js

@@ -1062,3 +1062,13 @@ test("addClass, removeClass, hasClass", function() {
 	jq.removeClass("class4");
 	ok( jq.hasClass("class4")==false, "Check the class has been properly removed" );
 });
+
+test("contents().hasClass() returns correct values", function() {
+	expect(2);
+
+	var $div = jQuery("<div><span class='foo'></span><!-- comment -->text</div>"), 
+	$contents = $div.contents();
+
+	ok( $contents.hasClass("foo"), "Found 'foo' in $contents" );
+	ok( !$contents.hasClass("undefined"), "Did not find 'undefined' in $contents (correctly)" );
+});