How to use the readchar.key.UP function in readchar

def test_cannot_move_beyond_upper_limit(self):
        stdin = (key.UP
                 + key.UP
                 + key.UP
                 + key.SPACE
                 + key.ENTER)
        message = 'Foo message'
        variable = 'Bar variable'
        choices = ['foo', 'bar', 'bazz']

        sys.stdin = StringIO(stdin)
        question = questions.Checkbox(variable, message, choices=choices)

        sut = ConsoleRender(key_generator=fake_key_generator)
        result = sut.render(question)

        self.assertEqual(['foo'], result)

def test_cannot_move_beyond_upper_limit(self):
        stdin = helper.event_factory(
            key.UP,
            key.UP,
            key.UP,
            key.SPACE,
            key.ENTER,)
        message = 'Foo message'
        variable = 'Bar variable'
        choices = ['foo', 'bar', 'bazz']

        question = questions.Checkbox(variable, message, choices=choices)

        sut = ConsoleRender(event_generator=stdin)
        result = sut.render(question)

        self.assertEqual(['foo'], result)

def test_move_up(self, *m):
        with InputContext(readchar.key.UP, "\r"):
            args_list = ["foo", "bar"]
            selindex = cutie.select(args_list, selected_index=1)
            self.assertEqual(selindex, 0)

def test_move_up_over_boundary(self, mock_print):
        with InputContext(readchar.key.UP, readchar.key.UP, "\r"):
            self.assertFalse(cutie.prompt_yes_or_no("foo"))
            self.assertEqual(mock_print.call_args_list[-5:], self.default_no_print_calls)

def test_move_up(self):
        stdin = helper.event_factory(key.DOWN, key.UP, key.ENTER)
        message = 'Foo message'
        variable = 'Bar variable'
        choices = ['foo', 'bar', 'bazz']

        question = questions.List(variable, message, choices=choices)

        sut = ConsoleRender(event_generator=stdin)
        result = sut.render(question)

        self.assertEqual('foo', result)

def test_cursor_movement(self):
        stdin_array = [
            'a',
            key.UP,
            'b',
            key.DOWN,
            'c',
            key.LEFT,
            'd',
            key.RIGHT,
            'e',
            key.ENTER,
            ]
        stdin = helper.event_factory(*stdin_array)
        message = 'Foo message'
        variable = 'Bar variable'

        question = questions.Text(variable, message)

        sut = ConsoleRender(event_generator=stdin)

def process_input(self, pressed):
        if pressed == key.UP:
            self.current = max(0, self.current - 1)
            return
        elif pressed == key.DOWN:
            self.current = min(len(self.question.choices) - 1,
                               self.current + 1)
            return
        elif pressed == key.SPACE:
            if self.current in self.selection:
                self.selection.remove(self.current)
            else:
                self.selection.append(self.current)
        elif pressed == key.LEFT:
            if self.current in self.selection:
                self.selection.remove(self.current)
        elif pressed == key.RIGHT:
            if self.current not in self.selection:

def select(
        options: List[str],
        selected_index: int = 0) -> int:
    print('\n' * (len(options) - 1))
    while True:
        print(f'\033[{len(options) + 1}A')
        for i, option in enumerate(options):
            print('\033[K{}{}'.format(
                '\033[1m[\033[32;1m x \033[0;1m]\033[0m ' if i == selected_index else
                '\033[1m[   ]\033[0m ', option))
        keypress = readchar.readkey()
        if keypress == readchar.key.UP:
            new_index = selected_index
            while new_index > 0:
                new_index -= 1
                selected_index = new_index
                break
        elif keypress == readchar.key.DOWN:
            new_index = selected_index
            while new_index < len(options) - 1:
                new_index += 1
                selected_index = new_index
                break
        elif keypress == readchar.key.ENTER:
            break
        elif keypress == readchar.key.CTRL_C:
            raise KeyboardInterrupt
    return selected_index

for index, target in enumerate(targets):
                # Only print the items that are within the visible range.
                # Due to lines changing their position on the screen when scrolling,
                # we need to redraw the entire line + add padding to make sure all
                # traces of the previous line are erased.
                if index in visible_target_range:
                    line = (digits_format_specifier + '. %s ') % (index + 1, target['desc'].ljust(longest_line))
                    if index == selected_target:
                        puts(colored.green(' -> %s' % line))
                    else:
                        puts(colored.white('    %s' % line))

        # Hang until we get a keypress
        key = readchar.readkey()

        if key == readchar.key.UP or key == 'k' and num_targets > 0:
            # Ensure the new selection would be valid & reset number input buffer
            if (selected_target - 1) >= 0:
                selected_target -= 1
            number_buffer = []

        elif key == readchar.key.DOWN or key == 'j' and num_targets > 0:
            # Ensure the new selection would be valid & reset number input buffer
            if (selected_target + 1) <= (num_targets - 1):
                selected_target += 1
            number_buffer = []

        elif key == 'g':
            # Go to top & reset number input buffer
            selected_target = 0
            number_buffer = []

def process_input(self, pressed):
        question = self.question
        if pressed == key.UP:
            if question.carousel and self.current == 0:
                self.current = len(question.choices) - 1
            else:
                self.current = max(0, self.current - 1)
            return
        if pressed == key.DOWN:
            if question.carousel and self.current == len(question.choices) - 1:
                self.current = 0
            else:
                self.current = min(
                    len(self.question.choices) - 1,
                    self.current + 1
                )
            return
        if pressed == key.ENTER:
            value = self.question.choices[self.current]