test_model_available_after_install.html

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<head>

  <meta charset="utf-8">

  <title>SpeechRecognition: available() is cached after a real install()</title>

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

  <script src="head.js"></script>

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

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<body>

<pre id="test">

<script>

"use strict";

// Uses the real local model hub (serve_model.py), not the in-process mock,

// so the download and the cache check both go through the genuine

// ModelHub/MLModelHubService code path.

//

// Requires (headless): python3 testing/tools/serve_model.py (see

// test_parakeet_e2e.html); started automatically for the parakeet-asr tag.

const SERVER_PORT = 8766;

const LANG = "en-US";

SimpleTest.waitForExplicitFinish();

SimpleTest.requestCompleteLog();

SimpleTest.requestFlakyTimeout("waiting for a real model download from serve_model.py");

// Requests observed via the parent-process http-on-modify-request topic,

// proxied to content as specialpowers-http-notify-request.

let requestsToHub = [];

const httpObserver = {

  observe(subject, topic, data) {

    if (topic !== "specialpowers-http-notify-request") {

      return;

    if (data.includes(`localhost:${SERVER_PORT}`)) {

      requestsToHub.push(data);

},

};

SpecialPowers.pushPrefEnv({

  set: [

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

    ["browser.ml.modelHubRootUrl", `http://localhost:${SERVER_PORT}/`],

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

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

],

}, async () => {

  SpecialPowers.addObserver(httpObserver, "specialpowers-http-notify-request");

  try {

    const opts = { langs: [LANG], processLocally: true };

    let status = await SpeechRecognition.available(opts);

    info(`initial availability: ${status}`);

    // install() requires transient user activation (it can trigger a large

    // download); synthesize it since this call isn't from a real user gesture.

    SpecialPowers.wrap(document).notifyUserGestureActivation();

    const installed = await SpeechRecognition.install(opts);

    ok(installed, "Model installed successfully from the real model hub");

    status = await SpeechRecognition.available(opts);

    is(status, "available", "Model reports available right after install()");

    // The regression: repeated availability checks on an installed model

    // must be served from the cache, not the network.

    requestsToHub = [];

    for (let i = 0; i < 3; i++) {

      status = await SpeechRecognition.available(opts);

      is(status, "available", `available() call #${i + 1} reports available`);

    is(requestsToHub.length, 0,

       "No network requests to the model hub for an already-cached model: " +

       JSON.stringify(requestsToHub));

    SimpleTest.finish();

  } catch (e) {

    ok(false, "Test threw: " + e + "\n" + e.stack);

    SimpleTest.finish();

  } finally {

    SpecialPowers.removeObserver(httpObserver, "specialpowers-http-notify-request");

});

</script>

</pre>

</body>

</html>