code: def test_encode(self):
      assert (
          self.window_service.encode(TEST_PROMPT).token_values
          == GPT2_TEST_TOKEN_IDS
      )
  
file_path: H2O/h2o_hf/helm/src/helm/benchmark/window_services/test_openai_window_service.py
imports: import shutil
  import tempfile
  from .test_utils import get_tokenizer_service, TEST_PROMPT, GPT2_TEST_TOKENS, GPT2_TEST_TOKEN_IDS
  from .tokenizer_service import TokenizerService
  from .window_service_factory import WindowServiceFactory
label_desc: Use image node_id 4 for calling the TestOpenAIWindowService obj's underlying member method code with example usage: obj.test_encode() without return types