Button tests: Work around a quirk in Opera.

Author: scottgonzalez

tests/unit/button/button_core.js

@@ -92,15 +92,24 @@ test("buttonset (rtl)", function() {
 // remove this when simulate properly simulates this
 // see http://yuilibrary.com/projects/yui2/ticket/2528826 fore more info
 if ( !$.ui.ie || ( document.documentMode && document.documentMode > 8 ) ) {
-	test( "ensure checked and aria after single click on checkbox label button, see #5518", function() {
+	asyncTest( "ensure checked and aria after single click on checkbox label button, see #5518", function() {
 		expect( 3 );
 
 		$("#check2").button().change( function() {
 			var lbl = $( this ).button("widget");
 			ok( this.checked, "checked ok" );
 			ok( lbl.attr("aria-pressed") === "true", "aria ok" );
 			ok( lbl.hasClass("ui-state-active"), "ui-state-active ok" );
-		}).button("widget").simulate("mousedown").simulate("click").simulate("mouseup");
+		});
+
+		// support: Opera
+		// Opera doesn't trigger a change event when this is done synchronously.
+		// This seems to be a side effect of another test, but until that can be
+		// tracked down, this delay will have to do.
+		setTimeout(function() {
+			$("#check2").button("widget").simulate("click");
+			start();
+		}, 1 );
 	});
 }