Datepicker: Added test for #4055 - onclick events contain references …

…to "jQuery".

tests/unit/datepicker/datepicker_tickets.js

@@ -5,4 +5,18 @@
 
 module("datepicker: tickets");
 
+test('#4055: onclick events contain references to "jQuery"', function() {
+	// no assertions, if the test fails, there will be an error
+
+	var _jQuery = jQuery;
+	jQuery = null;
+
+	$('<div/>').appendTo('body').datepicker()
+	// the third weekend day always exists
+	.find('tbody .ui-datepicker-week-end:eq(3)').click().end()
+	.datepicker('destroy');
+
+	jQuery = _jQuery;
+});
+
 })(jQuery);