{
  "tests": [
    {
      "description": "update-paths: The ServerTimestamp sentinel cannot be in an ArrayUnion",
      "comment": "The ServerTimestamp sentinel must be the value of a field. It may\nnot appear in an ArrayUnion.",
      "updatePaths": {
        "docRefPath": "projects/projectID/databases/(default)/documents/C/d",
        "fieldPaths": [
          {
            "field": [
              "a"
            ]
          }
        ],
        "jsonValues": [
          "[\"ArrayUnion\", 1, \"ServerTimestamp\", 3]"
        ],
        "isError": true
      }
    }
  ]
}