firestore/internal/conformance/testdata/query-select-empty.json

{
  "tests": [
    {
      "description": "query: empty Select clause",
      "comment": "An empty Select clause selects just the document ID.",
      "query": {
        "collPath": "projects/projectID/databases/(default)/documents/C",
        "clauses": [
          {
            "select": {
              "fields": []
            }
          }
        ],
        "query": {
          "select": {
            "fields": [
              {
                "fieldPath": "__name__"
              }
            ]
          },
          "from": [
            {
              "collectionId": "C"
            }
          ]
        }
      }
    }
  ]
}