code: def testComparison(
      self,
      left,
      right,
      expected_op,
      expected_lhs_field,
      expected_rhs_field,
      expected_rhs_value_type=None,
  ):
      pred = left < right
      actual_pb = pred.encode()
      self.assertEqual(actual_pb.operator.compare_op.op, expected_op)
      self.assertTrue(
          actual_pb.operator.compare_op.lhs.HasField(expected_lhs_field)
      )
      self.assertTrue(
          actual_pb.operator.compare_op.rhs.HasField(expected_rhs_field)
      )
      if expected_rhs_value_type:
          self.assertTrue(
              actual_pb.operator.compare_op.rhs.value.HasField(
                  expected_rhs_value_type
              )
          )
  
imports: import os
  from typing import Type, TypeVar
  from absl.testing import parameterized
  import tensorflow
  from tfx.dsl.placeholder import placeholder
  from tfx.proto.orchestration import placeholder_pb2
  from tfx.types import channel_utils
  from tfx.types import standard_artifacts
  from tfx.types.artifact import Artifact
  from tfx.types.artifact import Property
  from tfx.types.artifact import PropertyType
  from tfx.types.channel import Channel
  from google.protobuf import message
  from google.protobuf import text_format
label_desc: Use image node_id 1 for calling the PredicateTest obj's underlying member method code with example usage: obj.testComparison(left, right, expected_op, expected_lhs_field, expected_rhs_field, expected_rhs_value_type) without return types