75     def _write_test_data(self, root_key, subkeystr="sub_key",  argument
78         SetValue(root_key, test_key_name, REG_SZ, "Default value")
79         key = CreateKey(root_key, test_key_name)
117     def _read_test_data(self, root_key, subkeystr="sub_key", OpenKey=OpenKey):  argument
119         val = QueryValue(root_key, test_key_name)
123         key = OpenKey(root_key, test_key_name)
157     def _delete_test_data(self, root_key, subkeystr="sub_key"):  argument
158         key = OpenKey(root_key, test_key_name, 0, KEY_ALL_ACCESS)
179         DeleteKey(root_key, test_key_name)
182             key = OpenKey(root_key, test_key_name)
187     def _test_all(self, root_key, subkeystr="sub_key"):  argument
188         self._write_test_data(root_key, subkeystr)
189         self._read_test_data(root_key, subkeystr)
190         self._delete_test_data(root_key, subkeystr)