code: def test_split_and_join_strings(test_input, expectation):
      with expectation:
          assert test_input == utils.split_string(
              utils.join_strings(test_input, join_char="_"),
              split_char="_",
          )
  
imports: import queue
  import pytest
  from ..None import utils
label_desc: Use image node_id 2 for calling a global function with example usage: test_split_and_join_strings(test_input, expectation) without return types