How to use the dtale.app.DtaleFlask function in dtale

stack.enter_context(mock.patch('socket.gethostname', mock.Mock(return_value='test')))
        mock_timer = stack.enter_context(mock.patch('dtale.app.Timer', mock.Mock()))

        tmp = DtaleFlask('dtale', static_url_path='', reaper_on=False)
        tmp.run(port='9999')

        mock_run.assert_called_once()
        assert not tmp.reaper_on
        mock_timer.assert_not_called()

    with ExitStack() as stack:
        mock_run = stack.enter_context(mock.patch('flask.Flask.run', mock.Mock()))
        stack.enter_context(mock.patch('socket.gethostname', mock.Mock(return_value='test')))
        mock_timer = stack.enter_context(mock.patch('dtale.app.Timer', mock.Mock()))

        tmp = DtaleFlask('dtale', static_url_path='')
        tmp.run(debug=True, port='9999')

        mock_run.assert_called_once()
        assert not tmp.reaper_on
        mock_timer.assert_not_called()

args, _ = mock_timer.call_args
        assert args[0] == REAPER_TIMEOUT
        mock_run.assert_called_once()
        assert tmp.reaper is not None
        timer_instance = mock_timer.return_value
        timer_instance.start.assert_called_once()

        tmp.clear_reaper()
        timer_instance.cancel.assert_called_once()

    with ExitStack() as stack:
        mock_run = stack.enter_context(mock.patch('flask.Flask.run', mock.Mock()))
        stack.enter_context(mock.patch('socket.gethostname', mock.Mock(return_value='test')))
        mock_timer = stack.enter_context(mock.patch('dtale.app.Timer', mock.Mock()))

        tmp = DtaleFlask('dtale', static_url_path='', reaper_on=False)
        tmp.run(port='9999')

        mock_run.assert_called_once()
        assert not tmp.reaper_on
        mock_timer.assert_not_called()

    with ExitStack() as stack:
        mock_run = stack.enter_context(mock.patch('flask.Flask.run', mock.Mock()))
        stack.enter_context(mock.patch('socket.gethostname', mock.Mock(return_value='test')))
        mock_timer = stack.enter_context(mock.patch('dtale.app.Timer', mock.Mock()))

        tmp = DtaleFlask('dtale', static_url_path='')
        tmp.run(debug=True, port='9999')

        mock_run.assert_called_once()
        assert not tmp.reaper_on

def test_DtaleFlask():
    from dtale.app import DtaleFlask, REAPER_TIMEOUT

    with ExitStack() as stack:
        mock_run = stack.enter_context(mock.patch('flask.Flask.run', mock.Mock()))
        stack.enter_context(mock.patch('socket.gethostname', mock.Mock(return_value='test')))
        mock_timer = stack.enter_context(mock.patch('dtale.app.Timer'))

        tmp = DtaleFlask('dtale', static_url_path='', url='http://test:9999')
        tmp.run(port='9999')

        assert tmp.reaper_on
        assert tmp.shutdown_url == 'http://test:9999/shutdown'
        mock_timer.assert_called_once()
        args, _ = mock_timer.call_args
        assert args[0] == REAPER_TIMEOUT
        mock_run.assert_called_once()
        assert tmp.reaper is not None
        timer_instance = mock_timer.return_value
        timer_instance.start.assert_called_once()

        tmp.clear_reaper()
        timer_instance.cancel.assert_called_once()

    with ExitStack() as stack:

def build_app(url, reaper_on=True, hide_shutdown=False, host=None):
    """
    Builds :class:`flask:flask.Flask` application encapsulating endpoints for D-Tale's front-end

    :return: :class:`flask:flask.Flask` application
    :rtype: :class:`dtale.app.DtaleFlask`
    """

    app = DtaleFlask('dtale', reaper_on=reaper_on, static_url_path='', url=url)
    app.config['SECRET_KEY'] = 'Dtale'
    app.config['HIDE_SHUTDOWN'] = hide_shutdown

    app.jinja_env.trim_blocks = True
    app.jinja_env.lstrip_blocks = True
    app.register_blueprint(dtale)

    compress = Compress()
    compress.init_app(app)

    _, version = retrieve_meta_info_and_version('dtale')
    template = dict(
        info={
            'title': 'D-Tale',
            'version': version,
            'description': 'Web Client for Visualizing Pandas Objects',

def __init__(self, import_name, reaper_on=True, url=None, *args, **kwargs):
        """
        Constructor method
        :param reaper_on: whether to run auto-reaper subprocess
        :type reaper_on: bool
        """
        self.reaper_on = reaper_on
        self.reaper = None
        self.shutdown_url = build_shutdown_url(url)
        self.port = None
        super(DtaleFlask, self).__init__(import_name, *args, **kwargs)