brackt/app/services/simulations/__tests__
Claude d83f6976bf
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Stop the simulator re-run from trampling its caller's side effects
A review of this branch found four problems, all downstream of one decision:
calling runSportsSeasonSimulation from inside the result path. That function
does three jobs — recompute probabilities, recalculate standings, write the
daily EV snapshot — and the result path wants only the first.

1. The Discord standings post was silently suppressed on every scored match,
   for all 13 bracket-aware sports.

   recalculateAffectedLeagues detects change by snapshotting teamStandings,
   recalculating, then diffing; changedTeamIds gates the notification. But
   processMatchResult runs updateProbabilitiesAfterResult first, which now
   reached the runner's own recalculateStandings. The new totals were therefore
   already written when the "before" snapshot was taken, the diff came back
   empty, and the post never fired. previousRank went the same way:
   recalculateStandings rolls it forward on every call, so the extra one erased
   rank movement.

   runSportsSeasonSimulation now takes skipStandingsRecalc / skipSnapshots and
   the probability updater passes both. The snapshot is skipped because it is a
   per-day series keyed by snapshotDate — writing it per match result just
   overwrites the day's row with intra-day values.

2. finalizeQualifyingPoints marks the season completed immediately before
   calling the updater, and the runner rejects a completed season outright. With
   the ICM fallback gone that failed every time, stranding anyone still in the
   unfinished set on permanently stale probabilities — reachable for
   cs2_major_qualifying_points, the one bracket-aware qualifying-points sport.

   A completed season is not this branch's case rather than a failure: every
   placement is final and the floor it protects can no longer be contradicted.
   shouldRerunSimulator now excludes it and it falls through to ICM as before.
   The genuine failure modes still leave probabilities alone rather than falling
   back to the path being replaced.

3. match-sync calls processMatchResult in a per-match loop with no
   skipSideEffects, so each synced match ran a full Monte Carlo plus EV rewrite,
   snapshot and standings recalc. processMatchResult gains skipProbabilities —
   mirroring the option processPlayoffEvent already takes, and narrower than
   skipSideEffects — which match-sync passes in the loop before refreshing once
   at the end. Per-match standings and Discord posts are unchanged.

4. A partially-seeded afl_10 bracket now throws from inside the result path.
   The throw is correct and stays; the concern was that it was silent, which the
   error surfacing in 2 covers.

Two claims from the review did not hold up and were left alone: the batch
bracket route already passes skipSideEffects per match and refreshes once after
the loop, and autoCompleteRoundIfDone already passes skipProbabilities, so there
is no double run per round completion.

Tests: the runner honors both skip flags and still writes EVs; the updater asks
for probabilities only; a completed season takes the ICM path without erroring;
processMatchResult skips the refresh but still announces. The two behavioral
ones were confirmed to fail against the previous behavior.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VPxDnSEKVoKx9HFcQ6gmcS
2026-08-29 03:46:12 +00:00
..
afl-simulator.test.ts Make the AFL simulator read the bracket that was actually drawn 2026-08-29 02:42:31 +00:00
auto-racing-simulator.test.ts claude/indycar-ev-sims-probability-fpzfx6 (#139) 2026-08-17 22:50:35 +00:00
brackt-simulator.test.ts Add Brackt as a league-private meta-sport (#200) (#377) 2026-05-04 20:31:44 -07:00
college-hockey-simulator.test.ts Fix college hockey bracket resolution (#396) 2026-05-08 12:29:39 -07:00
cs-major-simulator.test.ts Unify majors: score once, fan out across windows + tennis bracket EV 2026-06-22 20:32:22 -07:00
darts-simulator.test.ts Fix simulator correctness bugs and reduce test iteration counts (#61) 2026-05-31 17:39:43 +00:00
epl-simulator.test.ts Fix simulator correctness bugs and reduce test iteration counts (#61) 2026-05-31 17:39:43 +00:00
golf-simulator.test.ts Add not-participating exclusion support for event results (#446) 2026-05-19 11:13:32 -07:00
input-policy.test.ts claude/fix-lint-errors-n48594 (#111) 2026-06-26 07:26:55 +00:00
llws-simulator.test.ts Fix EV reporting 20 pts for both LLWS 5-6 and 7-8 locked tiers 2026-08-27 16:11:59 +00:00
manifest.test.ts Route every bracket-aware sport away from ICM, not just AFL 2026-08-29 02:49:17 +00:00
mlb-simulator.test.ts Fix MLB simulator: projected wins drive seeding, perf fix, + surface simulate errors (#65) 2026-06-01 20:50:03 +00:00
mls-simulator.test.ts Add MLS standings sync and fix simulator conference resolution (#423) 2026-05-14 15:39:40 -07:00
nba-simulator.test.ts fix: NBA play-in bracket advancement bugs (#292) 2026-04-12 22:25:32 -07:00
ncaa-football-simulator.test.ts claude/clever-archimedes-dvye42 (#110) 2026-06-26 05:16:54 +00:00
ncaam-simulator.test.ts Upgrade NCAA preseason simulators (#419) 2026-05-12 22:26:25 -07:00
ncaaw-simulator.test.ts Upgrade NCAA preseason simulators (#419) 2026-05-12 22:26:25 -07:00
nfl-simulator.test.ts Add NFL season + playoffs Monte Carlo simulator (#272) 2026-04-07 09:39:34 -04:00
nhl-simulator.test.ts claude/probability-config-review-1tdolw (#119) 2026-06-30 23:24:48 +00:00
nll-simulator.test.ts Add NLL box lacrosse simulator implementation plan and preseason-draftability guidance (#417) 2026-05-12 14:22:34 -07:00
runner.test.ts Stop the simulator re-run from trampling its caller's side effects 2026-08-29 03:46:12 +00:00
simulator-config.test.ts Fix college hockey bracket resolution (#396) 2026-05-08 12:29:39 -07:00
snooker-simulator.test.ts Add snooker bracket simulator and Elo ratings admin UI, fixes #119 2026-03-23 08:24:28 -07:00
tennis-simulator.test.ts Unify majors: score once, fan out across windows + tennis bracket EV 2026-06-22 20:32:22 -07:00
ucl-simulator.test.ts Fix oxlint warnings: no-shadow, consistent-function-scoping, no-non-null-assertion, and others (#196) 2026-03-21 10:59:51 -07:00
wnba-simulator.test.ts Fix simulator brackets: NHL bracket-aware mode, MLB/NBA/WNBA sourceElo support (#358) 2026-04-30 08:33:57 -07:00
world-cup-simulator.test.ts Reflect group stage in World Cup sim; seed R32 from real 2026 bracket 2026-06-23 12:15:45 -07:00