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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Battery Test: navigator.getBattery() always return same battery promise</title>
+<link rel="author" title="YuichiNukiyama" href="https://github.com/YuichiNukiyama">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+promise_test(function () {
+ return navigator.getBattery().then(function (result) {
+ assert_class_string(result, 'BatteryManager',
+ 'getBattery should return BatteryManager Object.');
+ });
+}, 'navigator.getBattery() shall return BatteryManager as a promise');
+
+test(function () {
+ assert_equals(navigator.getBattery(), navigator.getBattery());
+}, 'navigator.getBattery() shall always return the same promise');
+</script>