code: def test_encode(
      self, columns, feature_spec, csv_line, instance, **kwargs
  ):
      schema = schema_utils.schema_from_feature_spec(feature_spec)
      coder = csv_coder.CsvCoder(columns, schema, **kwargs)
      self.assertEqual(coder.encode(instance), csv_line.encode("utf-8"))
  
file_path: transform/tensorflow_transform/coders/csv_coder_test.py
imports: import pickle
  import tensorflow
  from tensorflow_transform.coders import csv_coder
  from tensorflow_transform import test_case
  from tensorflow_transform.tf_metadata import schema_utils
label_desc: Use image node_id 1 for calling the TestCSVCoder obj's underlying member method code with example usage: obj.test_encode(columns, feature_spec, csv_line, instance) without return types