code: def test_memoryfile_bare_ext():
      """File extensions without a leading . are handled"""
      assert MemoryFile(ext="geojson").name.endswith(".geojson")
  
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 4 for calling a global function with example usage: test_memoryfile_bare_ext() without return types