Adds tests/mutation_killers.rs with six targeted tests derived from
cargo-mutants findings: cad_enabled true/false paths, Transmit
with-config boundary, CobsDecoder::reset behaviour, empty-frame
handling, and the cobs_encode_response success path.
Three mutants remain as provably equivalent — the justfile excludes
them by exact regex so any genuinely new mutant on the same line will
still surface. Updates test-miri to also run the integration tests
(proptest stays skipped because its file-persistence layer calls
getcwd). Gitignore picks up mutants.out / mutants.out.old.
cargo mutants: 89 caught, 9 unviable, 0 missed.
Hand-encoded byte sequences for RadioConfig, every Command tag, and
every Response tag, taken directly from the spec. Fields use hex-clean
values (freq_hz = 0x12345678, sync_word = 0xABCD, etc.) so each
little-endian byte is visually verifiable.
Locks firmware and host to the written spec — a refactor that quietly
changes a field layout fails here, not in the field.
Ten properties covering: RadioConfig roundtrip and validate/resolve
determinism; no-panic on arbitrary bytes for both Command::from_bytes
and RadioConfig::from_bytes; bounded-capacity for Transmit payloads
(guards the heapless::Vec size); Command roundtrip via a test-only
encoder (the library only decodes commands); COBS reversibility; and
two streaming CobsDecoder properties (no-panic on random byte streams
with random chunk boundaries, and a full encode→feed→decode roundtrip).
Adds Clone to Command and Response — benign public-API expansion that
unblocks proptest's Just strategy.
swaits