third_party/WebKit/LayoutTests/fast/dom/gc-3.html

   1 <head>
   2 <script>
   3 function doit()
   4 {
   5     B = document.getElementById("span-B");
   6     B.customProperty = "B";
   7
   8     document.getElementById("div").innerHTML = "<span>replacement content</span>";
   9
  10     // create lots of objects to force a garbage collection
  11     var i = 0;
  12     var s;
  13     while (i < 5000) {
  14         i = i+1.11;
  15         s = s + " ";
  16     }
  17
  18     var output= document.getElementById("output");
  19
  20     output.innerHTML += B.customProperty + "<BR>";
  21     if (B.parentNode) {
  22         output.innerHTML += "parent node exists<BR>";
  23     }
  24     if (B.firstChild) {
  25         output.innerHTML += "child node exists<BR>";
  26     }
  27 }
  28
  29 if (window.testRunner) {
  30     testRunner.dumpAsText();
  31 }
  32
  33 </script>
  34 </head>
  35
  36 <body onload="doit()">
  37 <div style="border: 1px solid red">
  38 <p>
  39 This test verifies that DOM nodes are retained because a wrapper exists for a descendant. A wrapper need not exist for the node itself or for an ancestor.
  40 </p>
  41 <p>
  42 The output should be the following pieces of text on lines by themselves: "replacement content", "B", "parent node exists", "child node exists".
  43 </p>
  44 </div>
  45 <div id="div">
  46 <span id="span-A"><span id="span-B"><span id="span-C">original span</span></span></span>
  47 </div>
  48 <div id="output">
  49 </div>
  50 </body>