code: def test_train(self):
      trainer_params = default_trainer_params()
      with tempfile.TemporaryDirectory() as d:
          trainer_params.output_dir = d
          main(trainer_params)
  
file_path: calamari/calamari_ocr/test/test_train_generated.py
imports: import json
  import os
  import tempfile
  import unittest
  import pytest
  from calamari_ocr.ocr.dataset.datareader.generated_line_dataset import TextGeneratorParams, LineGeneratorParams
  from calamari_ocr.ocr.dataset.datareader.generated_line_dataset.params import GeneratedLineDatasetParams
  from calamari_ocr.scripts.train import main
  from calamari_ocr.test.calamari_test_scenario import CalamariTestScenario
label_desc: Use image node_id 1 for calling the TestTrainGenerated obj's underlying member method code with example usage: obj.test_train() without return types