Function empty_group_fields

nodedb-query/src/msgpack_scan/group_key.rs:148–152

()

    #[test]
    fn empty_group_fields() {
        let doc = encode(&json!({"x": 1}));
        let key = build_group_key(&doc, &[]);
        assert_eq!(key, "__all__");
    }

    #[test]
    fn null_field_value() {