<!DOCTYPE html>

<html>
<head>
  <style type="text/css" media="screen">
  
    #container {
      position: relative;
      border: 1px solid black;
      height: 100px;
      width: 500px;
    }
    
    #box {
      position: absolute;
      height: 100px;
      width: 100px;
      background-color: blue;
      -webkit-animation-name: move;
      -webkit-animation-duration: 2s;
      -webkit-animation-direction: alternate-reverse;
      -webkit-animation-iteration-count: 2;
      -webkit-animation-timing-function: linear;
      -webkit-animation-fill-mode: forwards;
    }

    @-webkit-keyframes move {
      0%   {
        left: 0;
      }
      100% {
        left: 400px;
      }
    }
    
  </style>
  <script src="resources/animation-test-helpers.js" type="text/javascript" charset="utf-8"></script>
  <script type="text/javascript" charset="utf-8">

    const expectedValues = [
      // [time, element-id, property, expected-value, tolerance]
      [1.0, "box", "left", 200, 20],
      [2.0, "box", "left", 0, 20],

      [3.0, "box", "left", 200, 20],
      [4.0, "box", "left", 400, 20],
    ];
    
    runAnimationTest(expectedValues);
  </script>
</head>
<body>

<!-- Test animation-direction: alternate-reverse -->
<div id="container">
  <div id="box"></div>
</div>

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

</body>
</html>