third_party/WebKit/LayoutTests/fast/dom/gc-7.html

   1 <head>
   2 <script>
   3
   4 function frameLoaded()
   5 {
   6     // create lots of objects to force a garbage collection
   7     var i = 0;
   8     var s;
   9     while (i < 5000) {
  10         i = i+1.11;
  11         s = s + " ";
  12     }
  13
  14     var output= document.getElementById("output");
  15
  16     output.innerHTML += spanB.customProperty + "<BR>";
  17     output.innerHTML += spanB + "<BR>";
  18     output.innerHTML += spanB.parentNode + "<BR>";
  19     output.innerHTML += spanB.ownerDocument + "<BR>";
  20
  21     if (window.testRunner)
  22         testRunner.notifyDone();
  23 }
  24
  25 function doit()
  26 {
  27     var frame = document.getElementById("frame");
  28     frameDoc = frame.contentDocument;
  29     spanB = frame.contentDocument.getElementById("span-B");
  30     spanB.customProperty = "B";
  31     frame.onload = frameLoaded;
  32     frame.src = 'about:blank'
  33 }
  34
  35 if (window.testRunner) {
  36     testRunner.waitUntilDone();
  37     testRunner.dumpAsText();
  38 }
  39
  40 </script>
  41 </head>
  42
  43 <body onload="doit()">
  44 <div style="border: 1px solid red">
  45 <p>
  46 This test verifies that objects are protected against garbage
  47 collection as long as the document is alive (for contrast with test
  48 6).
  49 </p>
  50 <p>
  51 The output should be the following pieces of text on lines by
  52 themselves: "B", "[object HTMLElement]", "[object HTMLElement]", "[object HTMLDocument]".
  53 </p>
  54 </div>
  55
  56 <div id="output">
  57 </div>
  58
  59 <iframe id="frame" src='data:text/html,<div id="div"><span id="span-A"><span id="span-B"><span id="span-C">original span</span></span></span></div>'>
  60 </body>