code: def test_no_4_gram_class():
      """Test that bleu returns 0 for 4 gram."""
      bleu = BLEUScore()
      preds = ["My full pytorch-lightning"]
      targets = [
          ["My full pytorch-lightning test", "Completely Different"]
      ]
      assert bleu(preds, targets) == tensor(0.0)
  
imports: from functools import partial
  from typing import Any
  import pytest
  from nltk.translate.bleu_score import SmoothingFunction, corpus_bleu
  from torch import tensor
  from torchmetrics.functional.text.bleu import bleu_score
  from torchmetrics.text.bleu import BLEUScore
  from unittests.text.helpers import TextTester
  from unittests.text.inputs import _inputs_multiple_references
label_desc: Use image node_id 5 for calling a global function with example usage: test_no_4_gram_class() without return types