third_party/blink/web_tests/transitions/default-timing-function.html

<!DOCTYPE html>

<html>
<head>
  <style>
    .container {
      position: relative;
    }

    .box {
      position: relative;
      height: 100px;
      width: 100px;
      left: 0px;
      background-color: green;
      -webkit-transition-duration: 1s;
    }
    
    #box {
      -webkit-transition-property: left;
    }
    
    #box.final {
      left: 400px;
    }

    #box2 {
      -webkit-transition-property: -webkit-transform;
    }
    
    #box2.final {
      transform: translateX(400px);
    }
    
    #indicator {
      position: absolute;
      left: 322px;
      height: 200px;
      background-color: red;
    }
    
  </style>
  <script src="../animations/resources/animation-test-helpers.js"></script>
  <script>

    const expectedValues = [
      // [time, element-id, property, expected-value, tolerance]
      [0.5, 'box', 'left', 322, 5],
      [0.5, 'box2', '-webkit-transform.4', 322, 5],
    ];
  
    function setupTest()
    {
      document.getElementById('box').className = 'box final';
      document.getElementById('box2').className = 'box final';
    }
  
    runTransitionTest(expectedValues, setupTest);
  </script>
</head>
<body>

  <!-- The pixel result should show a green bar, with no red visible. -->
  <div class="container">
    <div id="indicator" class="box"></div>

    <div id="box" class="box"></div>
    <div id="box2" class="box"></div>
  </div>

  <div id="result"></div>

</body>
</html>