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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="resources/testharness-helpers.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/test-helpers.sub.js"></script>
<script>
promise_test(function(t) {
var script = 'resources/extendable-event-async-waituntil.js';
var scope = 'resources/async-waituntil';
var worker;
return service_worker_unregister_and_register(t, script, scope)
.then(function(registration) {
worker = registration.installing;
return wait_for_state(t, worker, 'activated');
})
.then(function() {
var channel = new MessageChannel();
var saw_message = new Promise(function(resolve) {
channel.port1.onmessage = function(e) { resolve(e.data); }
});
worker.postMessage({port: channel.port2}, [channel.port2]);
return saw_message;
})
.then(function(message) {
assert_equals(message, 'PASS');
return service_worker_unregister_and_done(t, scope);
})
}, 'Calling waitUntil asynchronously throws an exception');
</script>
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