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<!DOCTYPE html>
<meta charset="utf-8">
<title>Promise rejection ordering</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="help" href="https://html.spec.whatwg.org/multipage/webappapis.html#perform-a-microtask-checkpoint">
<body>
<p>A microtask checkpoint should notify about rejected promises. After
<a
href="https://html.spec.whatwg.org/multipage/webappapis.html#clean-up-after-running-script">cleaning
up after running script</a> involves running a microtask checkpoint. So the order of unhandledrejection
should occur before error2.
</p>
<script>
'use strict';
setup({ allow_uncaught_exception: true });
async_test(function(t) {
const events = [];
addEventListener('unhandledrejection', t.step_func(() => {
events.push('unhandledrejection');
}));
function insertInvalidScript(id) {
// Inserting <script> with an empty source schedules dispatching an 'error' event on
// the dom manipulation task source.
let script = document.createElement('script');
script.setAttribute('src', ' ');
script.addEventListener('error', t.step_func(() => {
events.push(`error${id}`);
// This will be the end of the test. Verify the results are correct.
if (id == 2) {
assert_array_equals(
events,
[
'raf1',
'resolve1',
'raf2',
'resolve2',
'error1',
'unhandledrejection',
'error2'
]
);
t.done();
}
}));
document.body.append(script);
}
requestAnimationFrame(t.step_func(() => {
events.push('raf1');
Promise.reject();
Promise.resolve(0).then(t.step_func(() => {
events.push('resolve1');
}));
insertInvalidScript(1);
}));
requestAnimationFrame(t.step_func(() => {
events.push('raf2');
Promise.resolve(0).then(t.step_func(() => {
events.push('resolve2');
}));
insertInvalidScript(2);
}));
});
</script>
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