code: def test_unicode_conversion(self):
      b = create_unicode_buffer("abc")
      self.assertEqual(len(b), 4)  # trailing nul char
      self.assertEqual(sizeof(b), 4 * sizeof(c_wchar))
      self.assertIs(type(b[0]), str)
      self.assertEqual(b[0], "a")
      self.assertEqual(b[:], "abc\0")
      self.assertEqual(b[::], "abc\0")
      self.assertEqual(b[::-1], "\0cba")
      self.assertEqual(b[::2], "ac")
      self.assertEqual(b[::5], "a")
  
file_path: cpython/Lib/test/test_ctypes/test_buffers.py
imports: import unittest
  from ctypes import create_string_buffer, create_unicode_buffer, sizeof, c_char, c_wchar
label_desc: Use image node_id 4 for calling the StringBufferTestCase obj's underlying member method code with example usage: obj.test_unicode_conversion() without return types