code: def test_cplerror_str():
      err = CPLE_BaseError(1, 1, "test123")
      assert str(err) == "test123"
  
file_path: rasterio/tests/test_err.py
imports: import logging
  import pytest
  import rasterio
  from rasterio._err import CPLE_BaseError
  from rasterio.errors import RasterioIOError
  from rasterio.env import GDALVersion
  from .conftest import gdal_version
label_desc: Use image node_id 4 for calling a global function with example usage: test_cplerror_str() without return types