Step 6 of multi-instancing migration. HeadlessEngineEnv.EnsureInitialized
is split into EnsureProcessGlobals (idempotent, process-once) +
SeedCharaIdsOnCurrentAmbient (per-test). New TestBattleScope IDisposable
sets up a fresh BattleAmbientContext per test. NonParallelizable removed
from converted classes; assembly-level Parallelizable(Fixtures) enabled.
SVSim.BattleEngine.Tests fully green under parallel test execution.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Card 103111050 (ELF cost-1 self-buff follower) carries skill_condition
`character=me&target=self&play_count>2`. New GatedConditionalOracleTests asserts
BOTH branches of the SAME card in one fixture, varying only the seeded per-turn
play count via the public AddCurrentTrunPlayCount seam (M4/M10):
* gate TRUE (seed 5 > 2) -> when_play powerup fires -> 1/1 -> 2/2
* gate FALSE (seed 0 <= 2) -> powerup is a NO-OP (stays 1/1), BUT the card
still pays its cost and still moves hand -> board.
This proves the engine SUPPRESSES an effect when a skill_condition is false (the
dual of "effect fires" — no prior milestone proved this), and that the gate
suppresses the EFFECT, not the PLAY. Jointly satisfiable only by a correctly-
gating engine: an always-buffs engine fails FALSE, a never-buffs engine fails
TRUE. Reuses the M4-proven buff dimension so the only new thing under test is the
conditional itself.
11/11 green; engine 0 errors; check_drift clean; ZERO new Engine copies / ZERO
shim / ZERO manifest changes — a clean milestone like M4/M6/M8/M10 (condition
evaluation is pure logic on copied engine code).
Load-bearing proof (M4/M6/M8/M10 discipline; the test passed on its first run,
which proves nothing alone): swapped the two seeds -> exactly the 4 stat
assertions failed for the right reason (formerly-TRUE branch seeded 0 took no
buff [1/1, expected 2/2]; formerly-FALSE branch seeded 5 buffed [2/2, expected
1/1]), while the cost-paid + hand->board assertions stayed green in both branches
— confirming the gate drives ONLY the effect and the card resolves regardless.
Reverted -> 11/11.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
