third_party/WebKit/LayoutTests/fast/events/resources/expect-cursor-update.js

   1 // Wait until any mouse cursor update has completed, then verify the cursor info
   2 // is what's expected and call the provided continuation.
   3 // We need to poll to ensure EventHandler's cursor update timer has had a chance to fire.
   4 function expectCursorUpdate(expectedInfo, completion) {
   5     // Need to give style application a chance to take effect first.
   6     requestAnimationFrame(function() {
   7         // Note that cursorUpdatePending should (almost?) always be true at this
   8         // point, but we probably shouldn't depend on that in case scheduler changes
   9         // result in rAF not firing until after the cursor update timer as already
  10         // fired.
  11         var onFrame = function() {
  12             if (internals.cursorUpdatePending) {
  13                 requestAnimationFrame(onFrame);
  14             } else {
  15                 shouldBeEqualToString('internals.getCurrentCursorInfo()', expectedInfo);
  16                 completion();
  17             }
  18         }
  19         requestAnimationFrame(onFrame);
  20     });
  21 }