test_install_overlap.html

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<html>

<head>

  <meta charset="utf-8">

  <title>SpeechRecognition: overlapping install() calls for the same language both settle correctly</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

</head>

<body>

<pre id="test">

<script>

"use strict";

// https://webaudio.github.io/web-speech-api/#dom-speechrecognition-install

// has no completed install cache in content: every install() call is

// expected to eventually resolve according to the requested languages'

// download outcome. A second install() call for a language with an in-flight

// install transaction must not just resolve false immediately; it must wait

// for that transaction and resolve the same way it does.

SimpleTest.waitForExplicitFinish();

SpecialPowers.pushPrefEnv({

  set: [

    ["media.webspeech.recognition.enable", true],

    ["browser.ml.modelHub.testing", true],

    ["media.webspeech.recognition.model-download.prompt.testing", true],

    ["media.navigator.permission.disabled", true],

],

}, async () => {

  try {

    // Fire without awaiting: both requests are in flight for the same

    // language at once, so the second must wait on the first rather than

    // resolving false immediately. install() consumes the transient user

    // activation it requires, hence one per call.

    const opts = { langs: ["en-US"], processLocally: true };

    SpecialPowers.wrap(document).notifyUserGestureActivation();

    const p1 = SpeechRecognition.install(opts);

    SpecialPowers.wrap(document).notifyUserGestureActivation();

    const p2 = SpeechRecognition.install(opts);

    const [r1, r2] = await Promise.all([p1, p2]);

    ok(r1, "First install() call succeeds");

    ok(r2, "Second, overlapping install() call for the same language " +

       "also succeeds instead of resolving false immediately");

    // A subsequent, non-overlapping install() call must still work (no

    // language stuck permanently marked "downloading").

    SpecialPowers.wrap(document).notifyUserGestureActivation();

    const r3 = await SpeechRecognition.install(opts);

    ok(r3, "A later install() call for the same language still succeeds");

  } catch (e) {

    ok(false, "Unexpected exception: " + e);

  SimpleTest.finish();

});

</script>

</pre>

</body>

</html>