def generate_functional_test(output_dir, batch, interaction_id, input_origin, user_interface_idiom, request_locale, request_latitude, request_longitude, restrictions_arr, upcm):
    '''
        :param model: Model name
        :param labeled_utterence: Dictionary representation of single row from .tsv file
        :param audio_file_path: Path to .opx audio file.
        :param output_dir: Directory in which to save new functest.xml
        :return: Full path to new functest.xml
    '''

    language = request_locale.split('_')[0]
    country = request_locale.split('_')[1]

    if not os.path.exists(output_dir):
        logging.info(f'{output_dir} does not exist. Creating it.')

        try:
            os.makedirs(output_dir)
        except Exception as e:
            logging.error(f'Attempting to create directory {output_dir + str(e)} failed.')
            return None

    download_audio(batch, interaction_id)
    audio_file_path = f'wabac/audio-debug.funcsuite/{interaction_id}.opx'

    reference_func_test_xml_path = 'reference_files/func_test_ref.xml'
    tree = ET.parse(reference_func_test_xml_path)
    root = tree.getroot()

    root.find('id').text = interaction_id
    root.find('name').text = interaction_id
    root.find('userInterfaceIdiom').text = user_interface_idiom

    if user_interface_idiom == 'PHONE':
        root.find('iPhone').text = 'true'
    if request_latitude:
        root.find('latitude').text = request_latitude
    if request_longitude:
        root.find('longitude').text = request_longitude

    for utterance in root.iter('com.apple.siri.ace.inspector.client.SpeechUtteranceFromFile'):
        utterance.find('speechFile').text = audio_file_path

        if input_origin:
            utterance.find('inputOrigin').text = input_origin

    for language_element in root.iter('language'):
        language_element.set('country', country)
        language_element.set('language', language)

    assistant_id = ET.Element('assistantId')
    assistant_id.text = upcm['assistantId']
    root.append(assistant_id)

    speech_id = ET.Element('speechId')
    speech_id.text = upcm['speechId']
    root.append(speech_id)

    if upcm['linkedAssistantId'] is not None:
        linked_assistant_id = ET.Element('linkedAssistantId')
        linked_assistant_id.text = upcm['linkedAssistantId']

    restrictions_elem = ET.Element('restrictions')

    for restriction in restrictions_arr:
        temp_sub = ET.SubElement(restrictions_elem, "java.lang.String")
        temp_sub.text = restriction

    root.append(restrictions_elem)

    func_test_filename = f'{interaction_id}.functest.xml'
    func_test_file_path = os.path.join(output_dir, func_test_filename)
    tree.write(func_test_file_path)

    if not os.path.isfile(func_test_file_path):
        logging.error(f'Failed to write {func_test_file_path}')
        return None

    return func_test_file_path