same-dispatch-time.html | Explore in Territory

<!doctype html>
<html>
  <head>
    <title>requestAnimationFrame in queue get the same timestamp</title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <link rel="help" href="http://w3c.github.io/animation-timing/#dfn-invoke-callbacks-algorithm"/>
  </head>
  <body>
    <div id="log"></div>
    <script>
      async_test(function (t) {
        var a = 0, b = 0;

        /* REASONING:
        * These two methods that will be called with a timestamp. Because
        * they execute right after eachother, they're added to the same
        * queue and SHOULD be timestamped with the same value.
        */
        requestAnimationFrame(t.step_func(function() { a = arguments[0]; }));
        requestAnimationFrame(t.step_func(function() {
          b = arguments[0];
          assert_not_equals(a, 0);
          assert_not_equals(b, 0);
          assert_equals(a, b);
          t.done();
        }));
      }, "requestAnimationFrame will timestamp events in the same queue with the same time");
    </script>
  </body>
</html>

chromium/third_party/blink/web_tests/external/wpt/html/webappapis/animation-frames/same-dispatch-time.html