code: def test_time_dataframe_dataset():
      import dtale.global_state as global_state
  
      global_state.clear_store()
      with build_app(url=URL).test_client() as c:
          c.get(
              "/dtale/datasets",
              query_string=dict(dataset="time_dataframe"),
          )
          assert global_state.get_data(1)["A"].isnull().sum() == 0
  
file_path: dtale/tests/dtale/test_upload.py
imports: import os
  import mock
  import pandas
  import pytest
  from six import BytesIO, PY3
  from dtale.app import build_app
  from dtale.pandas_util import check_pandas_version
  from tests import ExitStack
  from tests.dtale import build_data_inst
label_desc: Use image node_id 6 for calling a global function with example usage: test_time_dataframe_dataset() without return types