firestore/internal/conformance/testdata/query-invalid-operator.json

{
  "tests": [
    {
      "description": "query: invalid operator in Where clause",
      "comment": "The !=  operator is not supported.",
      "query": {
        "collPath": "projects/projectID/databases/(default)/documents/C",
        "clauses": [
          {
            "where": {
              "path": {
                "field": [
                  "a"
                ]
              },
              "op": "!=",
              "jsonValue": "4"
            }
          }
        ],
        "isError": true
      }
    }
  ]
}