third_party/WebKit/LayoutTests/fast/workers/worker-document-leak.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <script src="../../resources/js-test.js"></script>
   5 <script src='resources/worker-util.js'></script>
   6 </script>
   7 <body>
   8 <script>
   9 description('Verify that creation of a worker does not leak its creating document.');
  10
  11 window.jsTestIsAsync = true;
  12
  13 function log(message)
  14 {
  15     document.getElementById("console").innerHTML += message + "<br>";
  16 }
  17
  18 if (window.testRunner) {
  19     testRunner.dumpAsText();
  20     testRunner.waitUntilDone();
  21 }
  22
  23 // Set this number as high as possible without introducing timeouts in debug builds.
  24 // Reducing it does not require rebaselines.
  25 var numIterations = 6;
  26
  27 var currentIteration = 0;
  28 var iframe = null;
  29 var numLiveAtStart = 0;
  30 var numLiveAtEnd = 0;
  31
  32 window.onmessage = function(event) {
  33     if (event.data == "done") {
  34         runOneIteration();
  35     }
  36 };
  37
  38 function startTest()
  39 {
  40     gc();
  41     if (window.internals && window.internals.numberOfLiveDocuments) {
  42         numLiveAtStart = window.internals.numberOfLiveDocuments();
  43         // Depending on which tests ran before this one in DumpRenderTree,
  44         // their Document instances may not have been fully cleaned up yet.
  45         // When this test is run in isolation, there should be only one
  46         // live document at this point.
  47         runOneIteration();
  48     } else {
  49         debug("window.internals.numberOfLiveDocuments not available -- no point in running test");
  50         finishTest();
  51     }
  52 }
  53
  54 function runOneIteration() {
  55     if (currentIteration < numIterations) {
  56         ++currentIteration;
  57
  58         var createdIframe = false;
  59         if (!iframe) {
  60             iframe = document.createElement("iframe");
  61             createdIframe = true;
  62         }
  63         iframe.setAttribute("src", "resources/worker-document-leak-iframe.html");
  64         if (createdIframe)
  65             document.body.appendChild(iframe);
  66         return;
  67     }
  68     asyncGC(finishTest);
  69 }
  70
  71 function finishTest()
  72 {
  73     gc();
  74
  75     if (window.internals && window.internals.numberOfLiveDocuments) {
  76         numLiveAtEnd = window.internals.numberOfLiveDocuments();
  77         // Under no circumstances should the number of live documents
  78         // at the end be more than 1 greater than the number at the
  79         // beginning (because of the iframe).
  80         if (numLiveAtEnd > numLiveAtStart + 1) {
  81             testFailed("leaked documents during test run (started with " + numLiveAtStart + ", ended with " + numLiveAtEnd + ")");
  82         } else {
  83             testPassed("did not leak documents during test run");
  84         }
  85     }
  86     finishJSTest();
  87 }
  88
  89 window.onload = startTest;
  90 </script>
  91 </body>
  92 </html>