third_party/WebKit/LayoutTests/fast/dom/gc-acid3.html

   1   <div class="buckets"
   2    ><p id="bucket1" class="z"></p
   3    ><p id="bucket2" class="z"></p
   4    ><p id="bucket3" class="z"></p
   5    ><p id="bucket4" class="z"></p
   6    ><p id="bucket5" class="z"></p
   7    ><p id="bucket6" class="z"></p>
   8   </div>
   9 <p>There should be no assertion failures below, but the word DONE should show up.</p>
  10 <script>
  11 if (window.testRunner) {
  12     testRunner.dumpAsText();
  13 }
  14 </script>
  15 <script>
  16   function fail(message) {
  17       document.write(message + "<br>");
  18   }
  19   function assert(condition, message) {
  20     if (!condition)
  21       fail(message);
  22   }
  23   function assertEquals(expression, value, message) {
  24     if (expression != value) {
  25       expression = (""+expression).replace(/[\r\n]+/g, "\\n");
  26       value = (""+value).replace(/\r?\n/g, "\\n");
  27       fail("expected: " + value + ", got: " + expression + " - " + message);
  28     }
  29   }
  30
  31
  32       var d;
  33       // e1 - an element that's in a document
  34       d = document.implementation.createDocument(null, null, null);
  35       var e1 = d.createElement('test1');
  36       d.appendChild(d.createElement('root'));
  37       d.documentElement.appendChild(e1);
  38       assert(e1.parentNode, "e1 - parent element doesn't exist");
  39       assert(e1.parentNode.ownerDocument, "e1 - document doesn't exist");
  40       // e2 - an element that's not in a document
  41       d = document.implementation.createDocument(null, null, null);
  42       var e2 = d.createElement('test2');
  43       d.createElement('root').appendChild(e2);
  44       assert(e2.parentNode, "e2 - parent element doesn't exist");
  45       assert(e2.parentNode.ownerDocument, "e2 - document doesn't exist");
  46       // now try to decouple them
  47       d = null;
  48
  49       kungFuDeathGrip = [e1, e2];
  50       assert(e1.parentNode, "e1 - parent element doesn't exist after dropping reference to document");
  51       assert(e1.parentNode.ownerDocument, "e1 - document doesn't exist after dropping reference to document");
  52       assert(e2.parentNode, "e2 - parent element doesn't exist after dropping reference to document");
  53       assert(e2.parentNode.ownerDocument, "e2 - document doesn't exist after dropping reference to document");
  54       var loops = ((new Date().valueOf() - 1.1e12) / 32e9) * 0x500; // increases linearly over time
  55       for (var i = 0; i < loops; i += 1) {
  56         // we want to force a GC here, so we use up lots of memory
  57         // we take the opportunity to sneak in a perf test to make DOM and JS stuff faster...
  58         d = new Date();
  59         d = new (function (x) { return { toString: function () { return x.toString() } } })(d.valueOf());
  60         d = document.createTextNode("iteration " + i + " at " + d);
  61         document.createElement('a').appendChild(d);
  62         d = d.parentNode;
  63         document.body.insertBefore(d, document.getElementById('bucket1').parentNode);
  64         assert(document.getElementById('bucket2').nextSibling.parentNode.previousSibling.firstChild.data.match(/AT\W/i), "iteration " + i + " failed");
  65         d.setAttribute('class', d.textContent);
  66         document.body.removeChild(d);
  67       }
  68
  69       assert(e1.parentNode, "e1 - parent element doesn't exist after looping");
  70       assert(e1.parentNode.ownerDocument, "e1 - document doesn't exist after looping");
  71       assertEquals(e1.parentNode.ownerDocument.nodeType, 9, "e1 - document node type has wrong node type");
  72       assert(e2.parentNode, "e2 - parent element doesn't exist after looping");
  73       assert(e2.parentNode.ownerDocument, "e2 - document doesn't exist after looping");
  74       assertEquals(e2.parentNode.ownerDocument.nodeType, 9, "e2 - document node type has wrong node type");
  75
  76 </script>
  77 <p>DONE</p>