code: def test_empty_is_false() -> None:
      assert not evaluate("", lambda ident: False)
      assert not evaluate("", lambda ident: True)
      assert not evaluate("   ", lambda ident: False)
      assert not evaluate("\t", lambda ident: False)
  
file_path: pytest/testing/test_mark_expression.py
imports: from typing import Callable
  import pytest
  from _pytest.mark.expression import Expression
  from _pytest.mark.expression import ParseError
label_desc: Use image node_id 2 for calling a global function with example usage: test_empty_is_false() without return types