tests/Aetheria.Shared.Tests/FireControlCut4Tests.cs, builds its own minimal
fixtures rather than reusing FireAuthorityTests.cs's InstantWeapon-shaped
Engagement:
- BeamRollsPerInterval: over one second a beam produces exactly
1/BeamResolveInterval outcomes totalling Damage. Interval (.25s) and tick
(.125s) are both exact dyadic fractions so float accumulation cannot drift
the count, and the tick is strictly smaller than the interval so a "roll
every tick" mutant and a "roll once for the burst" mutant both fail.
- InstantWeaponFiresWithoutAnyOnFireSubscriber: pins the InstantWeapon half
of the null-conditional short-circuit fix, which no existing test could
catch (FireAuthorityTests.cs always calls FireControl.Fire directly, never
through Trigger()/Execute()).
- SplashHitsEveryEntityInRadius / SplashIsDirectional: FireControl.Splash
called directly against a zone of bare Ship entities (Entity.MapEntity,
run from the constructor, is enough to give a Ship Armor/GearOccupancy/
Hull without Activate() or a weapon catalog).
tests/mutation_tests_fire_control_cut4.py is the committed harness: a no-op
control plus one mutation per rule above, run against
tests/Aetheria.Shared.Tests via `dotnet test -p:CultLibRoot=...`. All seven
mutations behaved as declared in this pass.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
