code: def test_experiment_with_experiment_tag(self):
      experiment = """
              description: 'Test experiment'
              metric_infos: [
                { name: { tag: 'current_temp' } }
              ]
          """
      run = "exp"
      tag = metadata.EXPERIMENT_TAG
      t = provider.TensorTimeSeries(
          max_step=0,
          max_wall_time=0,
          plugin_content=self._serialized_plugin_data(
              DATA_TYPE_EXPERIMENT, experiment
          ),
          description="",
          display_name="",
      )
      self._mock_tb_context.data_provider.list_tensors.side_effect = (
          None
      )
      self._mock_tb_context.data_provider.list_tensors.return_value = {
          run: {tag: t}
      }
      self.assertProtoEquals(
          experiment, self._experiment_from_metadata()
      )
  
imports: import operator
  from unittest import mock
  import tensorflow
  from google.protobuf import text_format
  from tensorboard import context
  from tensorboard.data import provider
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.hparams import api_pb2
  from tensorboard.plugins.hparams import backend_context
  from tensorboard.plugins.hparams import metadata
  from tensorboard.plugins.hparams import plugin_data_pb2
label_desc: Use image node_id 6 for calling the BackendContextTest obj's underlying member method code with example usage: obj.test_experiment_with_experiment_tag() without return types