class_docstr: Tests for the directed acyclic word graph data structure that is used
  to store the unicode character names in unicodedata. Tests ported from PyPy
code: def test_forbid_empty_dawg(self):
      dawg = Dawg()
      self.assertRaises(ValueError, dawg.finish)
  
file_path: cpython/Lib/test/test_tools/test_makeunicodedata.py
imports: import unittest
  from test.test_tools import skip_if_missing, imports_under_tool
  from test import support
  from test.support.hypothesis_helper import hypothesis
label_desc: Use image node_id 2 for calling the TestDawg obj's underlying member method code with example usage: obj.test_forbid_empty_dawg() without return types