{
  "tests": [
    {
      "description": "set-merge: Merge with a field",
      "comment": "Fields in the input data but not in a merge option are pruned.",
      "set": {
        "docRefPath": "projects/projectID/databases/(default)/documents/C/d",
        "option": {
          "fields": [
            {
              "field": [
                "a"
              ]
            }
          ]
        },
        "jsonData": "{\"a\": 1, \"b\": 2}",
        "request": {
          "database": "projects/projectID/databases/(default)",
          "writes": [
            {
              "update": {
                "name": "projects/projectID/databases/(default)/documents/C/d",
                "fields": {
                  "a": {
                    "integerValue": "1"
                  }
                }
              },
              "updateMask": {
                "fieldPaths": [
                  "a"
                ]
              }
            }
          ]
        }
      }
    }
  ]
}