promise-with-eventlisteners.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /battery-status/promise-with-eventlisteners.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/resources/test-only-api.js"></script>

<script src="resources/battery-status-helpers.js"></script>

</head>

<body>

<script>

function nextEvent(target, name) {

  return new Promise(

      resolve => target.addEventListener(name, resolve, {once: true}));

battery_status_test(async (t, mockBatteryMonitor) => {

  mockBatteryMonitor.setBatteryStatus(false, 10, 20, 0.5);

  const battery = await navigator.getBattery();

  mockBatteryMonitor.verifyBatteryStatus(battery);

  const events = Promise.all([

    nextEvent(battery, 'chargingchange'),

    nextEvent(battery, 'chargingtimechange'),

    nextEvent(battery, 'dischargingtimechange'),

    nextEvent(battery, 'levelchange'),

]);

  t.step_timeout(() => mockBatteryMonitor.setBatteryStatus(true, 11, 22, 0.6));

  await events;

  mockBatteryMonitor.verifyBatteryStatus(battery);

}, 'event listeners fire as specified');

</script>

</body>

</html>