new_contents: from werobot.messages.entries import get_value
  
  
  class FakeIntance:
      pass
  
  
  def test_get_value():
      instance = FakeIntance()
      instance.b = 6
      instance.a = {'c': 'd'}
      assert get_value(instance, 'd', 'default') == 'default'
      assert get_value(instance, 'b', 'default') == 6
      assert get_value(instance, 'a.c') == 'd'
  
subject: add test for `werobot.messages.entries.get_value`