code: def test_scalar(self):
      self.assertFeature(
          feature=features.Scalar(
              dtype=tf.int64, doc="Some description"
          ),
          shape=(),
          dtype=tf.int64,
          tests=[
              testing.FeatureExpectationItem(
                  value=42,
                  expected=42,
              ),
          ],
      )
  
imports: import tensorflow
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import features
label_desc: Use image node_id 1 for calling the ScalarFeatureTest obj's underlying member method code with example usage: obj.test_scalar() without return types