code: def test_default_filename_for_row_is_unique(filename_provider):
      filenames = [
          filename_provider.get_filename_for_row(
              {},
              task_index=task_index,
              block_index=block_index,
              row_index=row_index,
          )
          for task_index in range(2)
          for block_index in range(2)
          for row_index in range(2)
      ]
      assert len(set(filenames)) == len(filenames)
  
file_path: ray/python/ray/data/tests/test_filename_provider.py
imports: import pandas
  import pytest
  from ray.data.datasource.filename_provider import _DefaultFilenameProvider
label_desc: Use image node_id 4 for calling a global function with example usage: test_default_filename_for_row_is_unique(filename_provider) without return types