The four voice::lookup tests shared one on-disk cache directory (base_dir
temp/sr-voice-lookup-test + world_seed 99). VoiceCacheStore persists on Drop
(save_all) and reloads on first zone access (load_zone), and cache_hit stores
'Voiced line.' under the identical (zone_id=100, CacheKey) that cache_miss looks
up — so under parallel execution the hit test's Drop/save could leak into the
miss test's lookup, returning 'Voiced line.' instead of 'Base line.'.
Give each test a directory keyed by test label + process id, so neither parallel
tests nor concurrent cargo test runs collide. Verified clean across repeated runs.
Closes T-1035.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
7776d99c14