code: def test_empty_initial_value(self):
      uploader = FileUpload()
      assert uploader.value == ()
  
file_path: catboost/contrib/python/ipywidgets/py3/ipywidgets/widgets/tests/test_widget_upload.py
imports: import datetime
  from unittest import TestCase
  from unittest.mock import MagicMock
  from traitlets import TraitError
  from ipywidgets import FileUpload
label_desc: Use image node_id 3 for calling the TestFileUpload obj's underlying member method code with example usage: obj.test_empty_initial_value() without return types