media/test/data/eme_remove_session_test.html

<!DOCTYPE html>
<title>Test that remove() succeeds on temporary sessions</title>
// This test is similar to the layout test
// encrypted-media-session-remove-temporary.html, but needs to run as a
// browser test as it needs access to a license server (for Widevine).

<div id="logs"></div>
<script src='eme_player_js/app_loader.js' type='text/javascript'></script>
<script type='text/javascript'>
  // This test only uses |keySystem| and |licenseServerURL|.
  var testConfig = new TestConfig();
  testConfig.loadQueryParams();

  // Use the default KEY_ID and KEY as specified in eme_player_js/globals.js.
  const keyId = KEY_ID;
  const key = KEY;

  // Code for using the Widevine key system.
  function WidevineKeySystemHelper() {}

  // Called when a 'message' event happens. Send the message to the license
  // server, and when the response is received, call update() and then call
  // |resolve| or |reject| as appropriate.
  WidevineKeySystemHelper.prototype.onMessage = function(
      event, resolve, reject) {
    var mediaKeySession = event.target;
    function onSuccess(response) {
      var key = new Uint8Array(response);
      Utils.timeLog('Calling update()');
      mediaKeySession.update(key).then(resolve, reject);
    }
    Utils.sendRequest(
        'POST', 'arraybuffer', Utils.convertToUint8Array(event.message),
        this.testConfig.licenseServerURL, onSuccess);
  };

  // Code for using the ClearKey key system.
  function ClearKeyKeySystemHelper() {}

  // Called when a 'message' event happens. For ClearKey we know the key to be
  // used, so simply call update() and then call |resolve| or |reject| as
  // appropriate.
  ClearKeyKeySystemHelper.prototype.onMessage = function(
      event, resolve, reject) {
    var mediaKeySession = event.target;

    Utils.timeLog('Calling update()');
    const jwkSet = Utils.createJWKData(keyId, key);
    mediaKeySession.update(jwkSet).then(resolve, reject);
  };

  var keySystemHelper;
  if (testConfig.keySystem == WIDEVINE_KEYSYSTEM) {
    keySystemHelper = new WidevineKeySystemHelper();
  } else if (
      testConfig.keySystem == CLEARKEY ||
      testConfig.keySystem == EXTERNAL_CLEARKEY) {
    keySystemHelper = new ClearKeyKeySystemHelper();
  } else {
    Utils.timeLog('Unsupported key system ' + testConfig.keySystem);
  }

  // This test doesn't play any media, so no concern with specifying multiple
  // codecs. This is done to provide a set of codecs that should cover all
  // user agents.
  config = [{
    initDataTypes: ['webm'],
    audioCapabilities: [
      {contentType: 'audio/mp4; codecs="mp4a.40.2"'},
      {contentType: 'audio/webm; codecs="opus"'},
    ],
    persistentState: 'optional',
    sessionTypes: ['temporary'],
  }];

  var mediaKeySession;
  navigator.requestMediaKeySystemAccess(testConfig.keySystem, config)
      .then(function(access) {
        Utils.timeLog(
            'Supports initDataType ' +
            access.getConfiguration().initDataTypes[0]);
        return access.createMediaKeys();
      })
      .then(function(mediaKeys) {
        Utils.timeLog('Creating session');
        mediaKeySession = mediaKeys.createSession();

        // Register for the 'message' event before it happens. Although the
        // event shouldn't be generated until after the generateRequest()
        // promise is resolved, the handlers may be queued before the
        // JavaScript code runs (and thus be lost if an event handler is
        // not registered).
        // When the 'message' event occurs, keySystemHelper.onMessage() will
        // run. It will end up calling update(), and |waitForMessagePromise|
        // will be resolved or rejected with the result of calling update().
        const waitForMessagePromise = Utils.waitForEvent(
            mediaKeySession, 'message', keySystemHelper.onMessage);

        // After update() is called, a 'keystatuseschange' event will occur.
        // Wait for it before checking the key statuses. Registering the event
        // handler now to ensure that the event gets caught. There is no need
        // to do anything in the event handler as the key statuses are on
        // |mediaKeySession|, and they can be checked after the promise is
        // resolved.
        const waitForKeyStatusChangePromise =
            Utils.waitForEvent(mediaKeySession, 'keystatuseschange');

        // As this is using 'webm' initDataType, the data to generateRequest()
        // is simply the key ID.
        Utils.timeLog('Calling generateRequest()');
        const generateRequestPromise = mediaKeySession.generateRequest(
            'webm', Utils.convertToUint8Array(keyId));

        // Can't tell what order the events happen, so simply wait for them all.
        return Promise.all([
          generateRequestPromise, waitForMessagePromise,
          waitForKeyStatusChangePromise
        ]);
      })
      .then(function() {
        // Session should have 1 usable key.
        Utils.timeLog('Checking for usable keyStatuses');
        Utils.verifyKeyStatuses(
            mediaKeySession.keyStatuses, [{keyId: keyId, status: 'usable'}]);

        promises = [];
        // Once remove() is called, another 'keystatuseschange' event will
        // happen.
        promises.push(Utils.waitForEvent(mediaKeySession, 'keystatuseschange'));

        Utils.timeLog('Calling remove()');
        promises.push(mediaKeySession.remove());

        return Promise.all(promises);
      })
      .then(function() {
        // After remove() all keys should be 'released'.
        Utils.timeLog('Checking for released keyStatuses');
        Utils.verifyKeyStatuses(
            mediaKeySession.keyStatuses, [{keyId: keyId, status: 'released'}]);
        // After remove() the session expiry should be NaN.
        if (!isNaN(mediaKeySession.expiration)) {
          Utils.failTest('expiration is not Nan');
          return;
        }
        Utils.timeLog('Calling close()');
        return mediaKeySession.close();
      })
      .then(function() {
        // After close() there should be no keys.
        Utils.timeLog('Checking for empty keyStatuses');
        Utils.verifyKeyStatuses(mediaKeySession.keyStatuses, []);
        Utils.setResultInTitle('ENDED');
      })
      .catch(function(error) {
        Utils.timeLog(error);
        Utils.failTest('Failed test.');
      });
</script>
</html>