firestore/internal/conformance/testdata/query-arrayunion-cursor.json

{
  "tests": [
    {
      "description": "query: ArrayUnion in cursor method",
      "comment": "ArrayUnion is not permitted in queries.",
      "query": {
        "collPath": "projects/projectID/databases/(default)/documents/C",
        "clauses": [
          {
            "orderBy": {
              "path": {
                "field": [
                  "a"
                ]
              },
              "direction": "asc"
            }
          },
          {
            "endBefore": {
              "jsonValues": [
                "[\"ArrayUnion\", 1, 2, 3]"
              ]
            }
          }
        ],
        "isError": true
      }
    }
  ]
}