code: def test_call_works_when_input_is_empty(self) -> None:
      splitter = StrSplitter()
  
      assert splitter("") == [""]
  
file_path: fairseq2/tests/unit/data/text/test_str_splitter.py
imports: from typing import Sequence
  import pytest
  from fairseq2.data.text.converters import StrSplitter
label_desc: Use image node_id 5 for calling the TestStrSplitter obj's underlying member method code with example usage: obj.test_call_works_when_input_is_empty() without return types