code: def test_generic_index_null(index, expected_repr):
      actual_repr = repr(index)
  
      assert expected_repr == actual_repr
  
imports: import textwrap
  import cupy
  import numpy
  import pandas
  import pytest
  from hypothesis import given, settings, strategies
  import cudf
  from cudf.testing import _utils
  from cudf.utils.dtypes import np_dtypes_to_pandas_dtypes
label_desc: Use image node_id 17 for calling a global function with example usage: test_generic_index_null(index, expected_repr) without return types