third_party/WebKit/LayoutTests/fast/dom/MutationObserver/mutation-record-nullity.html

   1 <!DOCTYPE html>
   2 <script src="../../../resources/js-test.js"></script>
   3 <script>
   4 description('Non-relevant properties on mutation records should be null, except for NodeLists, which should be empty');
   5 var observer = new MutationObserver(function() {});
   6
   7 var text = document.createTextNode('something');
   8 observer.observe(text, {characterData: true});
   9 text.data = 'something else';
  10 var record = observer.takeRecords()[0];
  11 debug('characterData record:');
  12 shouldBeNull('record.attributeName');
  13 shouldBeNull('record.attributeNamespace');
  14 shouldBeNull('record.oldValue');
  15 shouldBeNull('record.previousSibling');
  16 shouldBeNull('record.nextSibling');
  17 shouldBe('record.addedNodes.length', '0');
  18 shouldBe('record.removedNodes.length', '0');
  19
  20 var div = document.createElement('div');
  21 observer.observe(div, {childList: true});
  22 div.appendChild(document.createElement('span'));
  23 record = observer.takeRecords()[0];
  24 debug('\nchildList record:');
  25 shouldBeNull('record.attributeName');
  26 shouldBeNull('record.attributeNamespace');
  27 shouldBeNull('record.oldValue');
  28
  29 observer.observe(div, {attributes: true});
  30 div.setAttribute('data-foo', 'bar');
  31 record = observer.takeRecords()[0];
  32 debug('\nattributes record:');
  33 shouldBeNull('record.attributeNamespace');
  34 shouldBeNull('record.oldValue');
  35 shouldBeNull('record.previousSibling');
  36 shouldBeNull('record.nextSibling');
  37 shouldBe('record.addedNodes.length', '0');
  38 shouldBe('record.removedNodes.length', '0');
  39 </script>