~bigbes/tarantool-protobuf: 37c56322

json: enable conformance JSON output + close 459 tests

Three coupled changes that turn the JSON output path on for the
conformance harness:

1. string_to_int64 accepts cdata: Tarantool's json.decode parses raw
   JSON integer literals outside double range as int64_t/uint64_t cdata,
   not Lua numbers. The decoder errored "expected JSON string or number
   for int64" on any unquoted 64-bit value (Int64FieldMaxValueNotQuoted
   et al). cdata is now cast through directly, preserving precision.

2. encode_message marks output as a map: an empty proto3 message
   serialized as `[]` because Tarantool's json defaults empty tables to
   array shape. jsoncpp's strict comparator threw Json::LogicError and
   aborted the whole suite. Setting __serialize='map' on the output
   gives `{}` and unblocks all JsonOutput tests.

3. PB_CONFORMANCE_SKIP_JSON gate is opt-in by default. core.lua now
   matches exactly "1" (so docker -e VAR= disables it), and the
   Dockerfile no longer hard-codes "=1" — JSON output runs end-to-end
   for everyone unless they re-enable the gate.

Conformance moves from 930 / 1869 / 11 to 1389 / 1313 / 79
(successes / skipped / expected fails). The 75 new expected fails
are canonical-form edge cases (Duration formatting sign handling,
Timestamp out-of-range rejection, double precision digits, NaN
canonicalization, JSON-input strict rejection) — left for a follow-up.

Drops 7 entries from test/conformance/known_failures.txt that this
change closes; adds 75 newly-visible ones.

Eugene Blikh <bigbes@gmail.com> — 2026-05-15 22:04:55 UTC

Commit 37c56322536a2a0b1c8c79d9e531f613795ccba1view raw patch

Parent(s): b1273f1b

6 changed file(s)

FileStatus+
PLAN.md M +10 -7
README.md M +9 -6
cmd/conformance/core.lua M +3 -1
docker/conformance.Dockerfile M +5 -2
runtime/pb/json.lua M +11 -2
test/conformance/known_failures.txt M +75 -10