{
  "description": "Better of two choices always selected",
  "topology_description": {
    "type": "Sharded",
    "servers": [
      {
        "address": "a:27017",
        "avg_rtt_ms": 35,
        "type": "Mongos"
      },
      {
        "address": "b:27017",
        "avg_rtt_ms": 35,
        "type": "Mongos"
      }
    ]
  },
  "mocked_topology_state": [
    {
      "address": "a:27017",
      "operation_count": 0
    },
    {
      "address": "b:27017",
      "operation_count": 5
    }
  ],
  "iterations": 100,
  "outcome": {
    "tolerance": 0,
    "expected_frequencies": {
      "a:27017": 1,
      "b:27017": 0
    }
  }
}