third_party/WebKit/LayoutTests/fast/compositorworker/compositor-attribute-change.html

   1 <!DOCTYPE html>
   2 <div id="container"></div>
   3 <script src="../../resources/testharness.js"></script>
   4 <script src="../../resources/testharnessreport.js"></script>
   5 <script>
   6
   7 test(function() {
   8     var proxy = new CompositorProxy(document.getElementById('container'), ['opacity']);
   9     assert_throws("NoModificationAllowedError", function() { proxy.opacity = 0.4; });
  10     assert_throws("NoModificationAllowedError", function() { return proxy.opacity; });
  11 }, "This test checks that a compositor proxy cannot be mutated from the main thread.");
  12
  13 </script>