code: def test_memoryfile_fileobj(path_coutwildrnp_json):
      """GeoJSON file in an open file object can be read"""
      with open(path_coutwildrnp_json, "rb") as f:
          with fiona.open(f) as collection:
              assert len(collection) == 67
  
imports: import os
  from io import BytesIO
  import pytest
  import fiona
  from fiona import supported_drivers
  from fiona.drvsupport import _driver_supports_mode
  from fiona.errors import DriverError
  from fiona.io import MemoryFile, ZipMemoryFile
  from fiona.meta import supports_vsi
  from .conftest import requires_gdal2, requires_gpkg
label_desc: Use image node_id 15 for calling a global function with example usage: test_memoryfile_fileobj(path_coutwildrnp_json) without return types