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<!DOCTYPE html>
<html>
<head>
<title>Rotate the device frame around its x axis</title>
<meta name=viewport content="width=device-width, maximum-scale=1.0">
<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>Rotate the device frame around its x axis to run the test.</p>
<div id="log"></div>
<script>
var t1 = async_test("Beta is in [-180, 180)");
var run = false;
window.addEventListener("deviceorientation", function(e) {
if (!run && e.beta !== null) {
run = true;
t1.step(function() {
assert_greater_than_equal(e.beta, -180);
assert_less_than(e.beta, 180);
});
t1.done();
}
}, false);
</script>
</body>
</html>
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