immutable-prototype-serviceworker.https.html

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This WPT test may be referenced by the following Test IDs:
- /service-workers/service-worker/immutable-prototype-serviceworker.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

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

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

<script>

'use strict';

let expected = ['immutable', 'immutable', 'immutable', 'immutable', 'immutable'];

promise_test(t =>

  navigator.serviceWorker.register('resources/immutable-prototype-serviceworker.js', {scope: './resources/'})

      .then(registration => {

    let worker = registration.installing || registration.waiting || registration.active;

    let channel = new MessageChannel()

    worker.postMessage(channel.port2, [channel.port2]);

    let resolve;

    let promise = new Promise(r => resolve = r);

    channel.port1.onmessage = resolve;

    return promise.then(result => assert_array_equals(expected, result.data));

}),

'worker prototype chain should be immutable');

</script>

</html>