def METHOD_NAME(self):
    entry = self.entry
    self.__insert("foobar", 0)
    self.__delete_left(3, 4)
    self.__equal("fooar")
    self.__delete_right(1, 3)
    self.__equal("far")
    entry.undo()
    self.__equal("fooar")
    entry.undo()
    self.__equal("foobar")