code: def test_empty_list(self):
      splitter = DocumentSplitter()
      res = splitter.run(documents=[])
      assert res == {"documents": []}
  
file_path: haystack/test/components/preprocessors/test_document_splitter.py
imports: import pytest
  from haystack import Document
  from haystack.components.preprocessors import DocumentSplitter
label_desc: Use image node_id 3 for calling the TestDocumentSplitter obj's underlying member method code with example usage: obj.test_empty_list() without return types