code: def test_resolve_model():
      assert issubclass(_resolve_model("resnet18"), ModelWrapper)
      with pytest.raises(ValueError):
          _resolve_model("non-existing-model-123")
  
file_path: traintool/tests/test_main.py
imports: import comet_ml
  import pytest
  from tensorboardX import SummaryWriter
  from conftest import create_dataset
  from traintool.main import connect_comet, train, load, _resolve_model, _write_info_file, _read_info_file, _create_comet_experiment, _create_tensorboard_writer
  from traintool.model_wrapper import ModelWrapper
  from traintool.utils import DummyExperiment
label_desc: Use image node_id 1 for calling a global function with example usage: test_resolve_model() without return types