File: horizontal-surface-manual.https.html

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<!DOCTYPE html>
<html>
  <head>
    <title>DeviceOrientationEvent: A device lying flat on a horizontal surface</title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <link rel="author' title='Mosquito FP7">
    <link rel="reviewer author" title="Zhiqiang Zhang" href="mailto:zhiqiang.zhang@intel.com"> <!-- 2013-10-12 -->
  </head>
  <body>
    <p>Put the device on a horizontal surface to run the test.</p>
    <div id="log"></div>
    <script>
      var gamma, beta;
      var run = false;
      window.addEventListener("deviceorientation", function(e) {
        if (!run) {
          run = true;
          gamma = e.gamma; // Gamma : angle par rapport a x
          beta  = e.beta;  // Beta : angle par rapport a y
        }
      }, false);

      test(function() {
        assert_approx_equals(gamma, 0, 2);
      }, "X angle");

      test(function() {
        assert_approx_equals(beta, 0, 2);
      }, "Y angle");
    </script>
  </body>
</html>