code: def test_add_model(self):
      model_selection = ModelSelection()
      measured_values = {
          "val_loss": 0.043,
          "val_acc": 0.78,
          "train_loss": 0.023,
          "train_acc": 0.85,
      }
  
      model_id = str(1)
      model_selection.add_model(
          model_id, "/any/path/to/model.bin", measured_values
      )
      self.assertEqual((1,), model_selection.models.shape)
      self.assertEqual(model_id, model_selection.last_model_id)
  
imports: import unittest
  from small_text.training.metrics import Metric
  from small_text.training.model_selection import ModelSelectionResult, ModelSelection, NoopModelSelection
label_desc: Use image node_id 8 for calling the ModelSelectionTest obj's underlying member method code with example usage: obj.test_add_model() without return types