LayoutTests/fast/dom/gc-10.html

   1 <html>
   2 <head>
   3 <title>GC test 10</title>
   4 <script>
   5 function print(message, color)
   6 {
   7     var paragraph = document.createElement("div");
   8     paragraph.appendChild(document.createTextNode(message));
   9     paragraph.style.fontFamily = "monospace";
  10     if (color)
  11         paragraph.style.color = color;
  12     document.getElementById("console").appendChild(paragraph);
  13 }
  14
  15 var before,after;
  16 var threshold = 5;
  17
  18 function test()
  19 {
  20     if (window.GCController)
  21     {
  22         GCController.collect();
  23         before = GCController.getJSObjectCount();
  24
  25         window.frames.myframe.location.reload(true);
  26
  27         GCController.collect();
  28         after = GCController.getJSObjectCount();
  29
  30         // Unfortunately we cannot do a strict check here because there is still very minor (3) JS object increase,
  31         // likely due to temporary JS objects being created during further execution of this test function.
  32         // However, the iframe document leaking everything has an addition of ~25 objects every
  33         // refresh, so it still is an accurate test.
  34         if (after > (before + threshold))
  35         {
  36             print("FAIL: " + before + " objects before refresh, " + after + " objects after refresh.", "red");
  37         }
  38         else
  39         {
  40             print("PASS: Refresh did not leak JS objects.", "green");
  41         }
  42     }
  43     else
  44     {
  45         print("WARNING: Test cannot run if GCController does not exist. Thus it only runs from the test interface.", "red");
  46     }
  47 }
  48
  49 </script>
  50 </head>
  51
  52 <body style="color: black" onload="test()">
  53 <p>This page tests to make sure that the refresh of a page which holds a document reference in its DOM wrapper tree
  54 does not leak all of its associated JS objects.</p>
  55 <p>If the test passes, you'll see a single 'PASS' message below.</p>
  56 <hr>
  57
  58 <div id='console'></div>
  59
  60 <iframe name="myframe" id="myframe" src="resources/gc-10-frame.html">
  61 </body>
  62 </html>