code: def test_path_as_vsi_unparsed():
      """Correctly make GDAL filename from unparsed path"""
      assert _UnparsedPath("foo").as_vsi() == "foo"
  
imports: import sys
  import pytest
  import rasterio
  from rasterio.errors import PathError
  from rasterio._path import _parse_path, _vsi_path, _ParsedPath, _UnparsedPath
label_desc: Use image node_id 23 for calling a global function with example usage: test_path_as_vsi_unparsed() without return types