third_party/WebKit/LayoutTests/fast/dom/script-tests/dataset-gc.js

   1 description("This tests that custom properties on element.dataset persist GC.");
   2
   3 function gc()
   4 {
   5     if (window.GCController)
   6         return GCController.collect();
   7
   8     for (var i = 0; i < 10000; i++) {
   9         var s = new String("");
  10     }
  11 }
  12
  13
  14 var d = document.createElement("div");
  15
  16 var dataset = d.dataset;
  17 // Add a property to our prototype. It will be hidden by the corresponding data- attribute.
  18 dataset.__proto__.customProperty = 1;
  19 dataset.customProperty = 1; // Now set a property on ourselves.
  20 shouldBe("d.getAttribute('data-custom-property')", "'1'");
  21 shouldBe("d.dataset.customProperty", "'1'");
  22
  23 dataset = null;
  24
  25 gc();
  26
  27 // Test that the custom property persisted the GC.
  28 shouldBe("d.dataset.customProperty", "'1'");