def METHOD_NAME(self):
    processor = WhisperProcessor(tokenizer=self.get_tokenizer(), feature_extractor=self.get_feature_extractor())
    prompt_ids = processor.get_prompt_ids("")
    decoded_prompt = processor.tokenizer.decode(prompt_ids)
    self.assertListEqual(prompt_ids.tolist(), [50360, 220])
    self.assertEqual(decoded_prompt, "<|startofprev|> ")