old_contents: import re
  from os.path import join
  
  from django.test import override_settings
  from testil import assert_raises, tempdir
  
  import corehq.blobs as mod
  from corehq.util.test_utils import generate_cases
  from settingshelper import SharedDriveConfiguration
  
  
  @generate_cases([
      dict(root=None, msg=r"invalid shared drive path: None$"),
      dict(root="", msg=r"invalid shared drive path: ''$"),
      dict(root="file", msg=r"shared drive path is not a directory: '.*/file'$"),
      dict(blob_dir=None, msg="blob_dir is empty or not configured"),
      dict(blob_dir="", msg="blob_dir is empty or not configured"),
  ])
  def test_get_blobdb(self, msg, root=True, blob_dir=None):
      with tempdir() as tmp:
          if root == "file":
              tmp = join(tmp, "file")
              with open(tmp, "w") as fh:
                  fh.write("x")
          conf = SharedDriveConfiguration(
              shared_drive_path=tmp if root else root,
              restore_dir=None,
              transfer_dir=None,
              temp_dir=None,
              blob_dir=blob_dir,
          )
          with override_settings(SHARED_DRIVE_CONF=conf, S3_BLOB_DB_SETTINGS=None):
              with assert_raises(mod.Error, msg=re.compile(msg)):
                  mod.get_blob_db()
  
new_contents: import re
  from os.path import join
  
  from django.test import override_settings
  from testil import assert_raises, tempdir
  
  import corehq.blobs as mod
  from corehq.util.test_utils import generate_cases
  from settingshelper import SharedDriveConfiguration
  
  
  @generate_cases([
      dict(root=None, msg=r"invalid shared drive path: None$"),
      dict(root="", msg=r"invalid shared drive path: ''$"),
      dict(root="file", msg=r"shared drive path is not a directory: '.*/file'$"),
      dict(blob_dir=None, msg="blob_dir is empty or not configured"),
      dict(blob_dir="", msg="blob_dir is empty or not configured"),
  ])
  def test_get_blobdb(self, msg, root=True, blob_dir=None):
      with tempdir() as tmp:
          if root == "file":
              tmp = join(tmp, "file")
              with open(tmp, "w") as fh:
                  fh.write("x")
          conf = SharedDriveConfiguration(
              shared_drive_path=tmp if root else root,
              restore_dir=None,
              transfer_dir=None,
              temp_dir=None,
              blob_dir=blob_dir,
          )
          mod._db = []  # reset singleton
          with override_settings(SHARED_DRIVE_CONF=conf, S3_BLOB_DB_SETTINGS=None):
              with assert_raises(mod.Error, msg=re.compile(msg)):
                  mod.get_blob_db()
  
subject: fix test_get_blobdb test