text: from rule import RangeShardPolicy, RangeInfo
  from utils import range_config_to_range_infos
  
  import pytest
  
  
  def test_range_config_to_range_info():
      test_data = """{
                      "0": {"start": 0, "end": 100, "host": "192.168.0.102:6379"},
                      "1": {"start": 100, "end": -1, "host": "192.168.0.103:6379"},
                  }"""
      infos = range_config_to_range_infos(test_data) 
      info = RangeInfo(0, 100, "192.168.0.101:6379")
  
      assert len(infos) == 1
  