class_docstr: Unit tests for TensorBoardInfo typechecking and serialization.
class_docstr_tok: ["Unit","tests","for","TensorBoardInfo","typechecking","and","serialization","."]
code: def test_deserialization_rejects_missing_keys(self):
      info = _make_info()
      json_value = json.loads(manager._info_to_string(info))
      del json_value["start_time"]
      bad_input = json.dumps(json_value)
      with self.assertRaisesRegex(
          ValueError, re.escape("missing keys: ['start_time']")
      ):
          manager._info_from_string(bad_input)
  
imports: import dataclasses
  import datetime
  import errno
  import json
  import os
  import re
  import tempfile
  from unittest import mock
  from tensorboard import manager
  from tensorboard import test
  from tensorboard import version
  from tensorboard.util import tb_logging
label_desc: Use image node_id 9 for calling the TensorBoardInfoTest obj's underlying member method code with example usage: obj.test_deserialization_rejects_missing_keys() without return types