LayoutTests/fast/dom/dataset-gc.html - WebKit - Git at Google

 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
 <html>
 <head>
 <script src="../../resources/js-test-pre.js"></script>
 </head>
 <body>
 <script>
 description("This tests that custom properties on element.dataset persist GC.");

 function gc()
 {
     if (window.GCController)
         return GCController.collect();

     for (var i = 0; i < 10000; i++) {
         var s = new String("");
     }
 }


 var d = document.createElement("div");

 var dataset = d.dataset;
 // Add a property to our prototype. It will be hidden by the corresponding data- attribute.
 dataset.__proto__.customProperty = 1;
 dataset.customProperty = 1; // Now set a property on ourselves.
 shouldBe("d.getAttribute('data-custom-property')", "'1'");
 shouldBe("d.dataset.customProperty", "'1'");

 dataset = null;

 gc();

 // Test that the custom property persisted the GC.
 shouldBe("d.dataset.customProperty", "'1'");
 </script>
 <script src="../../resources/js-test-post.js"></script>
 </body>
 </html>
	<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
	<html>
	<head>
	<script src="../../resources/js-test-pre.js"></script>
	</head>
	<body>
	<script>
	description("This tests that custom properties on element.dataset persist GC.");

	function gc()
	{
	if (window.GCController)
	return GCController.collect();

	for (var i = 0; i < 10000; i++) {
	var s = new String("");
	}
	}


	var d = document.createElement("div");

	var dataset = d.dataset;
	// Add a property to our prototype. It will be hidden by the corresponding data- attribute.
	dataset.__proto__.customProperty = 1;
	dataset.customProperty = 1; // Now set a property on ourselves.
	shouldBe("d.getAttribute('data-custom-property')", "'1'");
	shouldBe("d.dataset.customProperty", "'1'");

	dataset = null;

	gc();

	// Test that the custom property persisted the GC.
	shouldBe("d.dataset.customProperty", "'1'");
	</script>
	<script src="../../resources/js-test-post.js"></script>
	</body>
	</html>