code: def test_feature_from_json(json):
      feature_connector = feature.FeatureConnector.from_json(json)
      assert isinstance(feature_connector, image_feature.Image)
      assert feature_connector.dtype == np.uint8
      assert feature_connector.shape == (128, 128, 1)
  
imports: import numpy
  import pytest
  import tensorflow
  from tensorflow_datasets.core.features import feature
  from tensorflow_datasets.core.features import image_feature
  from tensorflow_datasets.core.proto import feature_pb2
label_desc: Use image node_id 13 for calling a global function with example usage: test_feature_from_json(json) without return types