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function runTest(config,qualifier) {

    var testname = testnamePrefix(qualifier, config.keysystem)
                                    + ', temporary, '
                                    + /video\/([^;]*)/.exec(config.videoType)[1]
                                    + ', playback two videos';

    var configuration = {   initDataTypes: [ config.initDataType ],
                            audioCapabilities: [ { contentType: config.audioType } ],
                            videoCapabilities: [ { contentType: config.videoType } ],
                            sessionTypes: [ 'temporary' ] };

    promise_test(function(test)
    {
        var promises = config.video.map(function(video) { return play_video_as_promise(test,video); });
        return Promise.all(promises);

    }, testname);

    function play_video_as_promise(test, _video) {
        var _mediaKeys,
            _mediaKeySession,
            _mediaSource;

        function onFailure(error) {
            forceTestFailureFromPromise(test, error);
        }

        function onMessage(event) {
            assert_equals(event.target, _mediaKeySession);
            assert_true(event instanceof window.MediaKeyMessageEvent);
            assert_equals(event.type, 'message');

            assert_in_array( event.messageType, ['license-request', 'individualization-request']);

            config.messagehandler(event.messageType, event.message).then(function(response) {
                return _mediaKeySession.update(response);
            }).catch(onFailure);
        }

        function onEncrypted(event) {
            assert_equals(event.target, _video);
            assert_true(event instanceof window.MediaEncryptedEvent);
            assert_equals(event.type, 'encrypted');

            waitForEventAndRunStep('message', _mediaKeySession, onMessage, test);

            _mediaKeySession.generateRequest(config.initData ? config.initDataType : event.initDataType,
                                                config.initData || event.initData).catch(onFailure);
        }

        function wait_for_timeupdate_message(video)
        {
            return new Promise(function(resolve) {
                video.addEventListener('timeupdate', function listener(event) {
                    if (event.target.currentTime > (config.duration || 1))
                    {
                        video.removeEventListener('timeupdate', listener);
                        resolve(event);
                    }
                });
            });
        };

        return navigator.requestMediaKeySystemAccess(config.keysystem, [configuration]).then(function(access) {
            return access.createMediaKeys();
        }).then(function(mediaKeys) {
            _mediaKeys = mediaKeys;
            return _video.setMediaKeys(_mediaKeys);
        }).then(function() {
            _mediaKeySession = _mediaKeys.createSession('temporary');
            waitForEventAndRunStep('encrypted', _video, onEncrypted, test);
            return testmediasource(config);
        }).then(function(source) {
            _mediaSource = source;
            _video.src = URL.createObjectURL(_mediaSource);
            _video.play();
            return wait_for_timeupdate_message(_video);
        }).catch(onFailure);
    }
}