code: def test_expand_paths_defaults_to_dot():
      expected = _normpaths(
          ("./a/b/c.py", "./a/b/d.py", "./a/b/e/f.py")
      )
      assert _expand_paths(paths=()) == expected
  
imports: from __future__ import annotations
  import os.path
  import pytest
  from flake8 import utils
  from flake8.discover_files import _filenames_from
  from flake8.discover_files import expand_paths
label_desc: Use image node_id 15 for calling a global function with example usage: test_expand_paths_defaults_to_dot() without return types