third_party/WebKit/LayoutTests/fast/dom/MutationObserver/clear-transient-without-delivery.html

   1 <script src="../../../resources/js-test.js"></script>
   2 <script>
   3 window.jsTestIsAsync = true;
   4 description('Transient registrations should be cleared even without delivery.');
   5
   6 var mutationsDelivered = false;
   7 function callback(mutations) {
   8     mutationsDelivered = true;
   9 }
  10 var observer = new MutationObserver(callback);
  11
  12 var div = document.createElement('div');
  13 var span = div.appendChild(document.createElement('span'));
  14 observer.observe(div, {attributes: true, subtree: true});
  15 div.removeChild(span);
  16 setTimeout(function() {
  17     // By the time this function runs the transient registration should be cleared,
  18     // so we expect not to be notified of this attribute mutation.
  19     span.setAttribute('bar', 'baz');
  20     setTimeout(function() {
  21         shouldBeFalse('mutationsDelivered');
  22         finishJSTest();
  23     }, 0);
  24 }, 0);
  25 </script>