code: def test_fit_eval_default_metric(self):
      modelBuilder_keras = KerasModelBuilder(model_creator_keras)
      model = modelBuilder_keras.build(
          config={
              "lr": 1e-2,
              "batch_size": 32,
          }
      )
      val_result = model.fit_eval(
          data=self.data,
          validation_data=self.validation_data,
          epochs=20,
      )
      hist_metric_name = tf.keras.metrics.get("mse").__name__
      assert val_result.get(hist_metric_name)
  
file_path: BigDL/python/orca/test/bigdl/orca/automl/model/test_base_keras_model.py
imports: from unittest import TestCase
  from bigdl.orca.automl.model.base_keras_model import KerasBaseModel, KerasModelBuilder
  import numpy
  import tensorflow
  import pytest
label_desc: Use image node_id 3 for calling the TestBaseKerasModel obj's underlying member method code with example usage: obj.test_fit_eval_default_metric() without return types