code: def test_full_none_dtype():
      a = da.full(shape=(3, 3), fill_value=100, dtype=None)
      assert_eq(a, np.full(shape=(3, 3), fill_value=100, dtype=None))
  
file_path: dask/dask/array/tests/test_wrap.py
imports: from __future__ import annotations
  import pytest
  import numpy
  import dask.array
  from dask.array.utils import assert_eq
  from dask.array.wrap import ones
label_desc: Use image node_id 8 for calling a global function with example usage: test_full_none_dtype() without return types