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<!DOCTYPE html>
<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=""> <!-- 2013-10-12 -->
<p>Put the device on a horizontal surface to run the test.</p>
<div id="log"></div>
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");