code: def test_show_parquet():
      # the parquet data was built using these versions of pyarrow & pandas
      pytest.importorskip("pyarrow", minversion="0.17.1")
      pytest.importorskip("pandas", minversion="1.1.0")
      import dtale
  
      parquet_path = os.path.join(
          os.path.dirname(__file__), "..", "data/test_df.parquet"
      )
      mock_show = mock.Mock()
      with mock.patch(
          "dtale.cli.loaders.parquet_loader.show", mock_show
      ):
          dtale.show_parquet(path=parquet_path)
          df = mock_show.call_args[1]["data_loader"]()
          assert df is not None
  
file_path: dtale/tests/dtale/test_show_loaders.py
imports: import json
  import os
  import pandas
  import mock
  import pytest
  from six import PY3
  from dtale.pandas_util import check_pandas_version
  from tests import ExitStack
label_desc: Use image node_id 4 for calling a global function with example usage: test_show_parquet() without return types