def METHOD_NAME():
  from hbased import Hbase as thrift_hbase
  c = make_logged_in_client(username='test_hbase', is_superuser=False)
  grant_access('test_hbase', 'test_hbase', 'hbase')
  user = User.objects.get(username='test_hbase')
  proto = MockProtocol()
  client = thrift_hbase.Client(proto)
  impersonation_enabled = is_impersonation_enabled()
  get_conf()[_CNF_HBASE_IMPERSONATION_ENABLED] = 'FALSE'
  try:
    client.getTableNames(doas=user.username)
  except AttributeError:
    pass # We don't mock everything
  finally:
    get_conf()[_CNF_HBASE_IMPERSONATION_ENABLED] = impersonation_enabled
  assert_equal({}, proto.get_headers())
  get_conf()[_CNF_HBASE_IMPERSONATION_ENABLED] = 'TRUE'
  try:
    client.getTableNames(doas=user.username)
  except AttributeError:
    pass # We don't mock everything
  finally:
    get_conf()[_CNF_HBASE_IMPERSONATION_ENABLED] = impersonation_enabled
  assert_equal({'doAs': u'test_hbase'}, proto.get_headers())