code: def test_no_crs(tmpdir):
      # A dataset without crs is okay.
      name = str(tmpdir.join("lol.tif"))
      with rasterio.open(
          name,
          "w",
          driver="GTiff",
          width=100,
          height=100,
          count=1,
          dtype=rasterio.uint8,
      ) as dst:
          dst.write(
              np.ones((100, 100), dtype=rasterio.uint8), indexes=1
          )
  
imports: import logging
  import re
  from pathlib import Path
  import subprocess
  import affine
  import numpy
  import pytest
  from .conftest import requires_gdal35, gdal_version
  import rasterio
  from rasterio.drivers import blacklist
  from rasterio.enums import MaskFlags, Resampling
  from rasterio.env import Env, GDALVersion
  from rasterio.errors import RasterioIOError
label_desc: Use image node_id 5 for calling a global function with example usage: test_no_crs(tmpdir) without return types