code: def test_split_enum(self):
      self.assertEqual(repr(splits.Split.TRAIN), "Split('train')")
      self.assertIsInstance(splits.Split.TRAIN, splits.Split)
  
imports: from tensorflow_datasets import testing
  from tensorflow_datasets.core import naming
  from tensorflow_datasets.core import proto
  from tensorflow_datasets.core import splits
  from tensorflow_datasets.core.utils import shard_utils
  import tensorflow_datasets.public_api
label_desc: Use image node_id 10 for calling the SplitsTest obj's underlying member method code with example usage: obj.test_split_enum() without return types