Support Truthtrance charity commitments in Basic play

tests/fixture-truth-charity-commitment.ts

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+import assert from 'node:assert/strict';
+import { charityQuote } from '../game/charity';
+import { type Action, type Game, viewGame } from '../game/engine';
+import { type TruthQuestion } from '../game/truthtrance';
+import {
+  actTruthCharityPayments as act,
+  createTruthCharityPaymentsFixture,
+  declareTruthCharityPayments,
+  truthCharityPaymentsInventory as inventory,
+  truthCharityPaymentsPlayer as player,
+} from './fixture-truth-charity-payments';
+
+export { act, inventory, player };
+
+/** Original Basic classic factions with the selected Ix deck and original
+ * Truth cards, genuine Amal and Charity chronology. The only additional
+ * preparation is a real four-spice bribe, leaving the target at one spice;
+ * no wallet, cards, phase or readiness are installed by the fixture. */
+export function createTruthCharityCommitmentFixture() {
+  const base = createTruthCharityPaymentsFixture({ source: 'phase2', advanced: false });
+  assert.equal(base.game.phase, 2);
+  assert.equal(player(base.game, base.target).spice, 5);
+  const game = act(base.game, base.target, { type: 'bribe', target: base.asker, amount: 4 });
+  assert.equal(player(game, base.target).spice, 1);
+  assert.equal(charityQuote(game, player(game, base.target)).total, 1);
+  assert.deepEqual(inventory(game), base.originalCards);
+  return { ...base, game, unprepared: structuredClone(base.game), source: structuredClone(game),
+    charityQuestion: { kind: 'charity', target: base.target, turn: game.turn } satisfies TruthQuestion };
+}
+export type TruthCharityCommitmentFixture = ReturnType<typeof createTruthCharityCommitmentFixture>;
+
+export function askTruthCharityCommitment(f: TruthCharityCommitmentFixture, source = f.game, copy: 0 | 1 = 0) {
+  const declared = declareTruthCharityPayments(f, source, copy).game;
+  return act(declared, f.asker, { type: 'truthAsk', question: f.charityQuestion });
+}
+export function bindTruthCharityCommitment(f: TruthCharityCommitmentFixture, answer: 'yes' | 'no', source = f.game, copy: 0 | 1 = 0) {
+  const asked = askTruthCharityCommitment(f, source, copy);
+  assert.ok(viewGame(asked, f.target).truthCharityAnswers?.includes(answer));
+  return { asked, game: act(asked, f.target, { type: 'truthAnswer', answer }) };
+}
+export function rejectTruthCharityCommitment(game: Game, actor: string, action: Action) {
+  const before = structuredClone(game);
+  assert.throws(() => act(game, actor, action));
+  assert.deepEqual(game, before, 'Rejected actions preserve the input');
+}