code: def test_empty_corpus_should_raise_error():
      with pytest.raises(RuntimeError) as err:
          MultiFileJsonlCorpus(None, None, None)
  
      assert (
          str(err.value)
          == "No data provided when initializing corpus object."
      )
  
imports: import copy
  import shutil
  import pytest
  import flair
  import flair.datasets
  from flair.data import MultiCorpus, Sentence
  from flair.datasets import ColumnCorpus
  from flair.datasets.sequence_labeling import ONTONOTES, JsonlCorpus, JsonlDataset, MultiFileJsonlCorpus
label_desc: Use image node_id 41 for calling a global function with example usage: test_empty_corpus_should_raise_error() without return types