third_party/WebKit/LayoutTests/fast/media/lifetime.html

   1 <body onload="test()">
   2 <p>Test Media object lifetime.</p>
   3 <div id=result>Testing...</div>
   4 <iframe src="about:blank"></iframe>
   5 <script>
   6 if (window.testRunner) {
   7     testRunner.dumpAsText();
   8     testRunner.waitUntilDone();
   9 }
  10
  11 function gc()
  12 {
  13     if (window.GCController)
  14         return GCController.collect();
  15
  16     for (var i = 0; i < 10000; i++) { // > force garbage collection (FF requires about 9K allocations before a collect)
  17         var s = new String("abc");
  18     }
  19 }
  20
  21 function test()
  22 {
  23     if (!window.styleMedia) {
  24         document.getElementById("result").innerHTML = "FAIL - window.styleMedia is not supported.";
  25         return;
  26     }
  27
  28     styleMedia.foo = "bar";
  29     gc();
  30     if (styleMedia.foo != "bar") {
  31         document.getElementById("result").innerHTML = "FAIL - window.styelMedia doesn't return the same object each time.";
  32         return;
  33     }
  34
  35     var m = frames[0].styleMedia;
  36     document.body.removeChild(document.getElementsByTagName("iframe")[0]);
  37     try { m.matchMedium("foobar") } catch (ex) { }
  38     setTimeout(function() {
  39         gc();
  40         try { m.matchMedium("foobar") } catch (ex) { }
  41         document.getElementById("result").innerHTML = "PASS";
  42         if (window.testRunner)
  43             testRunner.notifyDone();
  44     }, 0);
  45 }
  46 </script>