A mod's tests/<name>.toml scripts run in the sandbox the game uses, with no game
and no window. The runner plays the game's part (the player and clock the mod
reads, ticks, frames, chat lines, commands, a reload) and each step checks what
the mod did: its commands, chat lines, command feedback and errors, HUD panel
and corner, or that it was turned off. A failing step names itself and prints
expected against got. Each script runs on a scratch copy, so storage starts
empty and is removed afterwards.
horizon_mods::testing (feature runtime) holds TestGame and Script; the cargo
subcommand builds the mod (or takes --hmod), filters scripts by name, and fails
when one does. The template gains tests/hello.toml, coords-hud gains panel and
where scripts, and the sandbox tests run the example's scripts and check the
runner's failures, reload and expected stops. Scripts don't care what language
the mod is written in, so script mods (Lua) get the same runner.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ludovic Marie
7bffc4c670