使用JSONpath

Question

我有以下JSON，我需要使用JSONPath检查total的值是否为10：

{
  "total": 10,
  "parkingSlots": [
    {
      "type": "MOTORCYCLE",
      "empty": true,
      "spaceId": "1m60"
    },
    {
      "type": "MOTORCYCLE",
      "empty": true,
      "spaceId": "1m61"
    },
    {
      "type": "CAR",
      "empty": true,
      "spaceId": "1c62"
    },
    {
      "type": "CAR",
      "empty": true,
      "spaceId": "1c63"
    },
    {
      "type": "CAR",
      "empty": true,
      "spaceId": "1c64"
    },
    {
      "type": "MOTORCYCLE",
      "empty": true,
      "spaceId": "2m65"
    },
    {
      "type": "MOTORCYCLE",
      "empty": true,
      "spaceId": "2m66"
    },
    {
      "type": "CAR",
      "empty": true,
      "spaceId": "2c67"
    },
    {
      "type": "CAR",
      "empty": true,
      "spaceId": "2c68"
    },
    {
      "type": "CAR",
      "empty": true,
      "spaceId": "2c69"
    }
  ]
}

我正在尝试使用

mockMvc.perform(get("/garage/equalParkingSpaces?levels=2&mSpaces=2&cSpaces=3"))
        .andExpect(status().isOk())
        .andExpect(jsonPath("$.total", is(10)));

但它不起作用，我的测试失败了。请告诉我如何检查总值。