How to use the taguette.validate.filename function in taguette

def test_filename(self):
        validate.filename.windows = True  # escape device names

        self.assertEqual(validate.filename('/etc/passwd'), 'passwd')
        self.assertEqual(validate.filename('/etc/passwd.txt'), 'passwd.txt')
        self.assertEqual(validate.filename('ééé'), '_')
        self.assertEqual(validate.filename('ééé.pdf'), '_.pdf')
        self.assertEqual(validate.filename('/tmp/NUL.pdf'), '_NUL.pdf')
        self.assertEqual(validate.filename('/tmp/nul.pdf'), '_nul.pdf')

def test_filename(self):
        validate.filename.windows = True  # escape device names

        self.assertEqual(validate.filename('/etc/passwd'), 'passwd')
        self.assertEqual(validate.filename('/etc/passwd.txt'), 'passwd.txt')
        self.assertEqual(validate.filename('ééé'), '_')
        self.assertEqual(validate.filename('ééé.pdf'), '_.pdf')
        self.assertEqual(validate.filename('/tmp/NUL.pdf'), '_NUL.pdf')
        self.assertEqual(validate.filename('/tmp/nul.pdf'), '_nul.pdf')

def test_filename(self):
        validate.filename.windows = True  # escape device names

        self.assertEqual(validate.filename('/etc/passwd'), 'passwd')
        self.assertEqual(validate.filename('/etc/passwd.txt'), 'passwd.txt')
        self.assertEqual(validate.filename('ééé'), '_')
        self.assertEqual(validate.filename('ééé.pdf'), '_.pdf')
        self.assertEqual(validate.filename('/tmp/NUL.pdf'), '_NUL.pdf')
        self.assertEqual(validate.filename('/tmp/nul.pdf'), '_nul.pdf')

def test_filename(self):
        validate.filename.windows = True  # escape device names

        self.assertEqual(validate.filename('/etc/passwd'), 'passwd')
        self.assertEqual(validate.filename('/etc/passwd.txt'), 'passwd.txt')
        self.assertEqual(validate.filename('ééé'), '_')
        self.assertEqual(validate.filename('ééé.pdf'), '_.pdf')
        self.assertEqual(validate.filename('/tmp/NUL.pdf'), '_NUL.pdf')
        self.assertEqual(validate.filename('/tmp/nul.pdf'), '_nul.pdf')

def setUp(self):
        web.Application.check_messages = lambda *a: None
        validate.filename.windows = True  # escape device names
        super(MyHTTPTestCase, self).setUp()
        self.cookie = SimpleCookie()

def test_filename(self):
        validate.filename.windows = True  # escape device names

        self.assertEqual(validate.filename('/etc/passwd'), 'passwd')
        self.assertEqual(validate.filename('/etc/passwd.txt'), 'passwd.txt')
        self.assertEqual(validate.filename('ééé'), '_')
        self.assertEqual(validate.filename('ééé.pdf'), '_.pdf')
        self.assertEqual(validate.filename('/tmp/NUL.pdf'), '_NUL.pdf')
        self.assertEqual(validate.filename('/tmp/nul.pdf'), '_nul.pdf')

def test_filename(self):
        validate.filename.windows = True  # escape device names

        self.assertEqual(validate.filename('/etc/passwd'), 'passwd')
        self.assertEqual(validate.filename('/etc/passwd.txt'), 'passwd.txt')
        self.assertEqual(validate.filename('ééé'), '_')
        self.assertEqual(validate.filename('ééé.pdf'), '_.pdf')
        self.assertEqual(validate.filename('/tmp/NUL.pdf'), '_NUL.pdf')
        self.assertEqual(validate.filename('/tmp/nul.pdf'), '_nul.pdf')

async def post(self, project_id):
        project, privileges = self.get_project(project_id)
        if not privileges.can_add_document():
            self.set_status(403)
            return self.send_json({'error': "Unauthorized"})
        try:
            name = self.get_body_argument('name')
            validate.document_name(name)
            description = self.get_body_argument('description')
            validate.document_description(description)
            try:
                file = self.request.files['file'][0]
            except (KeyError, IndexError):
                raise MissingArgumentError('file')
            content_type = file.content_type
            filename = validate.filename(file.filename)

            try:
                body = await convert.to_html_chunks(
                    file.body, content_type, filename,
                    self.application.config,
                )
            except convert.ConversionError as err:
                self.set_status(400)
                return self.send_json({
                    'error': str(err),
                })
            else:
                doc = database.Document(
                    name=name,
                    description=description,
                    filename=filename,