T5.1.1 — PriorityMode default = AudioFirst, QualityProfile backward-compat JSON, SetPriorityMode roundtrip

Status: Pending Review Agent: Kimi Code CLI Started: 2026-05-12T17:25Z Completed: 2026-05-12T17:40Z Commit: e34c40d PRD: ../PRD-video-quality-priority.md

What I changed

crates/wzp-proto/src/priority_mode.rs:40-48 — Added priority_mode_default_is_audio_first test verifying PriorityMode::default() == AudioFirst.
crates/wzp-proto/src/codec_id.rs:251-264 — Added quality_profile_backward_compat_old_json test: deserializes pre-T5.1 JSON (no priority_mode, no video fields) and asserts defaults (AudioFirst, None, None, None).
crates/wzp-proto/src/packet.rs:1380-1394 — Added set_priority_mode_roundtrip test: writes SignalMessage::SetPriorityMode to a buffer, reads it back, asserts equality.

Why these choices

Followed the T5.1.1 task description verbatim. The backward-compat test uses a raw JSON string that mirrors the serialized form emitted before T5.1 landed, confirming #[serde(default)] on the new fields works as intended. Roundtrip test uses the existing SignalMessage wire-format test helpers for consistency.

Deviations from the task spec

None.

Verification output

$ cargo test -p wzp-proto -- priority_mode_default_is_audio_first
    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.19s
     Running unittests src/lib.rs (target/debug/deps/wzp_proto-b3c44d45b5c05506)

running 1 test
test priority_mode::tests::priority_mode_default_is_audio_first ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 127 filtered out

$ cargo test -p wzp-proto -- quality_profile_backward_compat_old_json
    Finished `test` profile [unoptimized + debuginfo] target(s) in 1.03s
     Running unittests src/lib.rs (target/debug/deps/wzp_proto-b3c44d45b5c05506)

running 1 test
test codec_id::tests::quality_profile_backward_compat_old_json ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 128 filtered out

$ cargo test -p wzp-proto -- set_priority_mode_roundtrip
    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.19s
     Running unittests src/lib.rs (target/debug/deps/wzp_proto-b3c44d45b5c05506)

running 1 test
test packet::tests::set_priority_mode_roundtrip ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 127 filtered out

$ cargo fmt --all -- --check
# pass

$ cargo clippy -p wzp-proto --all-targets -- -D warnings
# pass

Test summary

Tests added: 3
Tests modified: 0
Workspace test count before: 127 / after: 130 (wzp-proto)
cargo clippy -p wzp-proto --all-targets -- -D warnings: pass
cargo fmt --all -- --check: pass

Risks / follow-ups

None. These are pure test additions; no production code changed.

Reviewer checklist (filled in by reviewer)

Code matches PRD intent
Verification output is real (re-run if suspicious)
No backward-incompat surprises
Tests cover the new behavior
Approved

3.0 KiB Raw Blame History