cobalt/layout_tests/testdata/css3-transitions/5-simple-transition.html

<!DOCTYPE html>
<!--
 | Test case which ensures that simple use of transitions works correctly and
 | that we see the right thing at the right time.
 -->
<html>
<head>
  <style>
    #block {
      width: 100px;
      height: 100px;
      background-color: red;
      font-size: 30px;
      transition: background-color 1s, transform 2s linear;
    }
  </style>
</head>
<body>
  <div id="block"></div>

  <script>

    if (window.testRunner) {
      window.testRunner.waitUntilDone();
    }

    var blockDiv = document.getElementById('block');

    window.addEventListener('load', function() {
      if (window.testRunner) {
        // Do a layout upon the load event so that we setup our source styles
        // that we will be transitioning from.
        window.testRunner.DoNonMeasuredLayout();
      }

      blockDiv.style.backgroundColor = 'blue';
      blockDiv.style.transform = "translate(100px, 0)";

      if (window.testRunner) {
        // Do another layout to start the transitions.
        window.testRunner.DoNonMeasuredLayout();

        // Run the transition to the half-way point and then measure the result.
        window.testRunner.AdvanceClockByMs(500);
        window.testRunner.notifyDone();
      }
    });
  </script>

</body>
</html>