bpo-30917: IDLE: Fix mock_config deepcopy to read_string (#2754)

Patch by LouieLu.

Author: mlouielu

Lib/idlelib/idle_test/test_config.py

@@ -196,17 +196,18 @@ class IdleConfTest(unittest.TestCase):
 
  @classmethod
  def setUpClass(cls):
+ cls.config_string = {}
+
  conf = config.IdleConf(_utest=True)
  if __name__ != '__main__':
  idle_dir = os.path.dirname(__file__)
  else:
  idle_dir = os.path.abspath(sys.path[0])
  for ctype in conf.config_types:
  config_path = os.path.join(idle_dir, '../config-%s.def' % ctype)
- conf.defaultCfg[ctype] = config.IdleConfParser(config_path)
- conf.userCfg[ctype] = config.IdleUserConfParser(config_path)
- conf.LoadCfgFiles()
- cls.conf = conf
+ with open(config_path, 'r') as f:
+ cls.config_string[ctype] = f.read()
+
  cls.orig_warn = config._warn
  config._warn = Func()
 
@@ -222,7 +223,12 @@ def mock_config(self):
 
  Both default and user config used the same config-*.def
  """
- conf = copy.deepcopy(self.conf)
+ conf = config.IdleConf(_utest=True)
+ for ctype in conf.config_types:
+ conf.defaultCfg[ctype] = config.IdleConfParser('')
+ conf.defaultCfg[ctype].read_string(self.config_string[ctype])
+ conf.userCfg[ctype] = config.IdleUserConfParser('')
+ conf.userCfg[ctype].read_string(self.config_string[ctype])
 
  return conf