code: def test_subword_decoding_greedy_forward_hypotheses(
      self, tmp_tokenizer, alignments, timestamps
  ):
      cfg = CTCBPEDecodingConfig(
          strategy="greedy",
          preserve_alignments=alignments,
          compute_timestamps=timestamps,
      )
      decoding = CTCBPEDecoding(
          decoding_cfg=cfg, tokenizer=tmp_tokenizer
      )
  
      B, T = 4, 20
      V = decoding.tokenizer.tokenizer.vocab_size + 1
      input_signal = torch.randn(size=(B, T, V))
      length = torch.randint(low=1, high=T, size=[B])
  
      with torch.no_grad():
          hyps, _ = decoding.ctc_decoder_predictions_tensor(
              input_signal,
              length,
              fold_consecutive=True,
              return_hypotheses=True,
          )
  
          for idx, hyp in enumerate(hyps):
              assert isinstance(hyp, Hypothesis)
              assert torch.is_tensor(hyp.y_sequence)
              assert isinstance(hyp.text, str)
  
              # alignments check
              if alignments:
                  assert hyp.alignments is not None
                  assert isinstance(hyp.alignments, tuple)
                  assert len(hyp.alignments[0]) == length[idx]
                  assert len(hyp.alignments[1]) == length[idx]
  
              # timestamps check
              if timestamps:
                  check_subword_timestamps(hyp, decoding)
  
file_path: NeMo/tests/collections/asr/decoding/test_ctc_decoding.py
imports: import os
  from functools import lru_cache
  import pytest
  import torch
  from omegaconf import DictConfig, OmegaConf
  from nemo.collections.asr.parts.mixins import mixins
  from nemo.collections.asr.parts.submodules.ctc_decoding import CTCBPEDecoding, CTCBPEDecodingConfig, CTCDecoding, CTCDecodingConfig
  from nemo.collections.asr.parts.utils.rnnt_utils import Hypothesis
label_desc: Use image node_id 6 for calling the TestCTCDecoding obj's underlying member method code with example usage: obj.test_subword_decoding_greedy_forward_hypotheses(tmp_tokenizer, alignments, timestamps) without return types