code: def testGetDataDependentNodeIds(self):
      x1 = mock.MagicMock()
      x1.id = "x1"
      x2 = mock.MagicMock()
      x2.id = "x2"
      p = mock.MagicMock()
      p.id = "p"
  
      just_channel = channel.Channel(type=_MyType)
      output_channel_x1 = channel.OutputChannel(
          artifact_type=_MyType,
          producer_component=x1,
          output_key="out1",
      )
      output_channel_x2 = channel.OutputChannel(
          artifact_type=_MyType,
          producer_component=x2,
          output_key="out1",
      )
      pipeline_input_channel = channel.PipelineInputChannel(
          output_channel_x1, output_key="out2"
      )
      pipeline_output_channel = channel.PipelineOutputChannel(
          output_channel_x2, p, output_key="out3"
      )
      pipeline_input_channel.pipeline = p
      union_channel = channel.union(
          [output_channel_x1, output_channel_x2]
      )
      resolved_channel_ = resolved_channel.ResolvedChannel(
          _MyType, resolver_op.InputNode(union_channel)
      )
  
      def check(ch, expected):
          with self.subTest(channel_type=type(ch).__name__):
              actual = list(ch.get_data_dependent_node_ids())
              self.assertCountEqual(
                  actual,
                  expected,
                  f"Expected {expected} but got {actual}.",
              )
  
      check(just_channel, [])
      check(output_channel_x1, ["x1"])
      check(output_channel_x2, ["x2"])
      check(pipeline_input_channel, ["p"])
      check(pipeline_output_channel, ["p"])
      check(union_channel, ["x1", "x2"])
      check(resolved_channel_, ["x1", "x2"])
  
imports: from unittest import mock
  import tensorflow
  from tfx.dsl.input_resolution import resolver_op
  from tfx.dsl.placeholder import placeholder
  from tfx.types import artifact
  from tfx.types import channel
  from tfx.types import resolved_channel
  from google.protobuf import struct_pb2
  from ml_metadata.proto import metadata_store_pb2
label_desc: Use image node_id 11 for calling the ChannelTest obj's underlying member method code with example usage: obj.testGetDataDependentNodeIds() without return types