code: def test_gtiff_profile_dtype():
      assert DefaultGTiffProfile()["dtype"] == rasterio.uint8
  
imports: import pickle
  import pytest
  import rasterio
  from rasterio.profiles import Profile, DefaultGTiffProfile
  from rasterio.profiles import default_gtiff_profile
label_desc: Use image node_id 9 for calling a global function with example usage: test_gtiff_profile_dtype() without return types