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<!DOCTYPE html>
<title>Rotate the device frame around its z 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=""> <!-- 2013-10-12 -->
<p>Rotate the device frame around its z axis to run the test.</p>
<div id="log"></div>
var t1 = async_test("Alpha is in [0, 360)");
var run = false;
window.addEventListener("deviceorientation", function(e) {
if (!run && e.alpha !== null) {
run = true;
t1.step(function() {
assert_greater_than_equal(e.alpha, 0);
assert_less_than(e.alpha, 360);
}, false);