accordion: fixed incosistent accordionchange event arguments (http://dev.jquery.com/ticket/3111)

tests/accordion.js

@@ -99,4 +99,34 @@ test("handle click on header-descendant", function() {
 	state2(ac, 0, 1, 0);
 });
 
+test("active:false", function() {
+	$("#list1").accordion({
+		active: false,
+		alwaysOpen: false
+	});
+	equals( $("#list1 a.selected").size(), 0, "no headers selected" );
+});
+
+test("accordionchange event, open closed and close again", function() {
+	expect(8);
+	$("#list1").accordion({
+		active: false,
+		alwaysOpen: false
+	})
+	.one("accordionchange", function(event, ui) {
+		equals( ui.oldHeader.size(), 0 )
+		equals( ui.oldContent.size(), 0 )
+		equals( ui.newHeader.size(), 1 )
+		equals( ui.newContent.size(), 1 )
+	})
+	.accordion("activate", 0)
+	.one("accordionchange", function(event, ui) {
+		equals( ui.oldHeader.size(), 1 )
+		equals( ui.oldContent.size(), 1 )
+		equals( ui.newHeader.size(), 0 )
+		equals( ui.newContent.size(), 0 )
+	})
+	.accordion("activate", 0);
+});
+
 })(jQuery);

ui/ui.accordion.js

@@ -201,12 +201,11 @@ function clickHandler(event) {
 	// find elements to show and hide
 	var toShow = clicked.next(),
 		toHide = options.active.next(),
-		//data = [clicked, options.active, toShow, toHide],
 		data = {
 			options: options,
-			newHeader: clicked,
+			newHeader: clickedActive && !options.alwaysOpen ? $([]) : clicked,
 			oldHeader: options.active,
-			newContent: toShow,
+			newContent: clickedActive && !options.alwaysOpen ? $([]) : toShow,
 			oldContent: toHide
 		},
 		down = options.headers.index( options.active[0] ) > options.headers.index( clicked[0] );
@@ -218,7 +217,7 @@ function clickHandler(event) {
 };
 
 function findActive(headers, selector) {
-	return selector != undefined
+	return selector
 		? typeof selector == "number"
 			? headers.filter(":eq(" + selector + ")")
 			: headers.not(headers.not(selector))