class_docstr: Checks all functions of the GitCodeDriver
class_docstr_tok: ["Checks","all","functions","of","the","GitCodeDriver"]
code: def test_ensure_code_refs_dir(self):
      dir = ".git/refs/datmo"
      self.git_code_manager.init()
      result = self.git_code_manager.ensure_code_refs_dir()
      assert result == True and os.path.isdir(
          os.path.join(self.git_code_manager.filepath, dir)
      )
  
imports: from __future__ import division
  from __future__ import unicode_literals
  import os
  import time
  import shutil
  import tempfile
  import platform
  from io import open
  from datmo.core.controller.code.driver.git import GitCodeDriver, GitHostDriver
  from datmo.core.util.exceptions import CommitFailed, CommitDoesNotExist, PathDoesNotExist, GitExecutionError, DatmoFolderInWorkTree, UnstagedChanges
label_desc: Use image node_id 31 for calling the TestGitCodeDriver obj's underlying member method code with example usage: obj.test_ensure_code_refs_dir() without return types