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Test Info: Warnings

<!DOCTYPE html>
<meta charset="utf-8">
<title>Notification.onshow (basic)</title>
<link rel="author" title="Intel" href="">
<link rel="author" title="Xin Liu" href="">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
promise_setup(() => {
return test_driver.set_permission({ name: "notifications" }, "granted")
promise_test(async t => {
const notification = new Notification("New Email Received")
const event = await new Promise(resolve => {
notification.onshow = resolve;
assert_equals(, "[object Event]")
assert_equals(event.type, "show", "Checked the event type.")
}, "Invoked the onshow event handler.")