code: def test_gen_save():
      happy_gen.save("model/")
      result_before = happy_gen.generate_text(
          "Natural language processing is"
      )
  
      happy = HappyGeneration(model_name="model/")
      result_after = happy.generate_text(
          "Natural language processing is"
      )
  
      assert result_before == result_after
  
imports: import torch
  from happytransformer import HappyGeneration, GENSettings, GENTrainArgs, GENEvalArgs
  import pytest
  from tests.run_save_load import run_save_load
  from tests import happy_gen
label_desc: Use image node_id 12 for calling a global function with example usage: test_gen_save() without return types