code: def test_is_valid_chunk_type(arr_type, result):
      """Test is_valid_chunk_type for correctness"""
      assert is_valid_chunk_type(arr_type) is result
  
imports: from __future__ import annotations
  import operator
  import numpy
  import pytest
  import dask.array
  from dask.array import Array
  from dask.array.chunk_types import is_valid_array_chunk, is_valid_chunk_type
  from dask.array.utils import assert_eq
label_desc: Use image node_id 5 for calling a global function with example usage: test_is_valid_chunk_type(arr_type, result) without return types