code: def test_kr_jamo_filler():
      """
      Jamo filler is 0 width.
  
      According to https://www.unicode.org/L2/L2006/06310-hangul-decompose9.pdf this character and others
      like it, ``\uffa0``, ``\u1160``, ``\u115f``, ``\u1160``, are not commonly viewed with a terminal,
      seems it doesn't matter whether it is implemented or not, they are not typically used !
      """
      phrase = "\u1100\u1160"
      expect_length_each = (2, 1)
      expect_length_phrase = 3
  
      # exercise,
      length_each = tuple(map(wcwidth.wcwidth, phrase))
      length_phrase = wcwidth.wcswidth(phrase)
  
      # verify.
      assert length_each == expect_length_each
      assert length_phrase == expect_length_phrase
  
file_path: catboost/contrib/python/wcwidth/py3/tests/test_core.py
imports: import wcwidth
label_desc: Use image node_id 12 for calling a global function with example usage: test_kr_jamo_filler() without return types