如何使用 response.path 计算响应（Json）的总和？

Question

似乎很难通过针对我的 Json 响应执行我放心的逻辑来计算具有“PLAYER”角色类型的小队成员的数量。

目前我有一个简单的设置，它到达一个端点，然后执行我的查询，我可以看到端点和响应是有效的，但是在尝试通过我的查询过滤以计算总和时似乎存在问题扮演“PLAYER”角色的小队成员。

我的放心密码：

@Test
public void locatePlayerCalculateSum() {
    Response response = given()
            .spec(footballCompetitions_requestSpecification)
            .when().get(EndPoint.TEAMS + EndPoint.SQUAD);
    int sum = response.path("squad.collect { it.role == \"PLAYER\" }.sum()");
    System.out.println(sum);
}

异常消息：java.lang.IllegalArgumentException：没有方法签名：java.lang.Boolean.plus() 适用于参数类型：(java.lang.Boolean) 值：[true] 可能的解决方案：is(java.lang.Object), or(java.lang.Boolean), imply(java.lang.Boolean), and(java.lang.Boolean), use([Ljava.lang.Object;),拆分（groovy.lang.Closure）

JSON 响应示例：

  "id": 66,
  "area": {
      "id": 2072,
      "name": "England"
  },
  "activeCompetitions": [
      {
          "id": 2021,
          "area": {
              "id": 2072,
              "name": "England"
          },
          "name": "Premier League",
          "code": "PL",
          "plan": "TIER_ONE",
          "lastUpdated": "2019-01-03T23:39:45Z"
      },
      {
          "id": 2001,
          "area": {
              "id": 2077,
              "name": "Europe"
          },
          "name": "UEFA Champions League",
          "code": "CL",
          "plan": "TIER_ONE",
          "lastUpdated": "2018-12-13T18:55:02Z"
      }
  ],
  "name": "Manchester United FC",
  "shortName": "Man United",
  "tla": "MNU",
  "crestUrl": "http://upload.wikimedia.org/wikipedia/de/d/da/Manchester_United_FC.svg",
  "address": "Sir Matt Busby Way Manchester M16 0RA",
  "phone": "+44 (0161) 8688000",
  "website": "http://www.manutd.com",
  "email": "enquiries@manutd.co.uk",
  "founded": 1878,
  "clubColors": "Red / White",
  "venue": "Old Trafford",
  "squad": [
      {
          "id": 3188,
          "name": "David De Gea",
          "position": "Goalkeeper",
          "dateOfBirth": "1990-11-07T00:00:00Z",
          "countryOfBirth": "Spain",
          "nationality": "Spain",
          "shirtNumber": 1,
          "role": "PLAYER"
      },
      {
          "id": 3202,
          "name": "Sergio Romero",
          "position": "Goalkeeper",
          "dateOfBirth": "1987-02-22T00:00:00Z",
          "countryOfBirth": "Argentina",
          "nationality": "Argentina",
          "shirtNumber": null,
          "role": "PLAYER"
      },
      {
          "id": 7942,
          "name": "Lee Grant",
          "position": "Goalkeeper",
          "dateOfBirth": "1983-01-27T00:00:00Z",
          "countryOfBirth": "England",
          "nationality": "England",
          "shirtNumber": 13,
          "role": "PLAYER"
      },
      {
          "id": 3206,
          "name": "Marcos Rojo",
          "position": "Defender",
          "dateOfBirth": "1990-03-20T00:00:00Z",
          "countryOfBirth": "Argentina",
          "nationality": "Argentina",
          "shirtNumber": 16,
          "role": "PLAYER"
      },```

Answer 1

这应该可行：

@Test
public void locatePlayerCalculateSum() {
    Response response = given()
            .spec(footballCompetitions_requestSpecification)
            .when().get(EndPoint.TEAMS + EndPoint.SQUAD);
    int sum = response.path("squad.count { it.role == 'PLAYER' }");
    System.out.println(sum);
}