Honor group alliances in Truthtrance

tests/coalition-truth-bribe-targets.test.ts

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+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { baseDeck } from '../game/cards';
+import { coalitionOf, emptyCoalitionState } from '../game/coalition-alliance';
+import { applyAction, createGame, newPlayer, type Action, type Game } from '../game/engine';
+
+const send = (game: Game, actor: string, action: Action) => applyAction(game, actor, action);
+
+/** Stage the Nexus, spendable purse and physical card. The alliance and Truthtrance
+ * priority are real actions; b and c are a's group allies, d and e outsiders. */
+function questionWindow(): Game {
+  let game = createGame('GROUPBRIBETRUTH', newPlayer('a', 'Atreides', 'atreides'), false);
+  game.players.push(newPlayer('b', 'Emperor', 'emperor'), newPlayer('c', 'Fremen', 'fremen'),
+    newPlayer('d', 'Harkonnen', 'harkonnen'), newPlayer('e', 'Guild', 'guild'));
+  Object.assign(game, {status:'playing', phase:1, turn:2, nexus:true,
+    order:['a','b','c','d','e'], ready:[], deck:baseDeck()});
+  game.coalitionState = emptyCoalitionState('unlimited');
+  game.players.find(player => player.id === 'a')!.spice = 5;
+  game = send(game, 'a', {type:'alliance', target:'b'});
+  game = send(game, 'b', {type:'alliance', target:'a'});
+  const group = coalitionOf(game.players, game.coalitionState, 'a'); assert.ok(group);
+  game = send(game, 'a', {type:'coalitionPropose', groupId:group.id, entrant:'c',
+    expectedRevision:game.coalitionState!.revision});
+  for (const actor of ['b', 'c']) {
+    const offer = game.coalitionState!.proposal!;
+    game = send(game, actor, {type:'coalitionAnswer', event:offer.event, nexus:offer.nexus,
+      turn:offer.turn, accept:true, expectedRevision:game.coalitionState!.revision});
+  }
+  const index = game.deck.findIndex(card => card.effect === 'truthtrance'); assert.ok(index >= 0);
+  const [card] = game.deck.splice(index, 1); game.players.find(player => player.id === 'e')!.hand.push(card);
+  game = send(game, 'e', {type:'card', card:card.id});
+  while (game.truthtrance?.stage === 'priority') {
+    const actor = game.players.find(player => !game.truthtrance!.passed.includes(player.id)); assert.ok(actor);
+    game = send(game, actor.id, {type:'truthPass'});
+  }
+  return game;
+}
+
+const fact = {kind:'fact', fact:{kind:'spice', compare:'gte', value:0}};
+function question(family: 'bribe' | 'bribeExpression' | 'mixedBribe' | 'turnActions', recipient: string) {
+  const base = {kind:family, target:'a', turn:2};
+  if (family === 'bribe') return {...base, recipient, minimum:1};
+  if (family === 'bribeExpression') return {...base, claim:{kind:'and', terms:[
+    {kind:'payment', recipient, minimum:1}, {kind:'payment', recipient:'d', minimum:1},
+  ]}};
+  if (family === 'mixedBribe') return {...base, mixed:{kind:'or', terms:[fact,
+    {kind:'action', action:{recipient, minimum:1}},
+  ]}};
+  return {...base, mixed:{kind:'or', terms:[fact,
+    {kind:'action', action:{kind:'payment', recipient, minimum:1}},
+  ]}};
+}
+
+for (const family of ['bribe', 'bribeExpression', 'mixedBribe', 'turnActions'] as const)
+  void test(`${family} question rejects an allied group payment and accepts an outsider`, () => {
+    const game = questionWindow(), before = structuredClone(game);
+    assert.throws(() => send(game, 'e', {type:'truthAsk', question:question(family, 'b')}));
+    assert.deepEqual(game, before, 'A rejected allied-payment question retains its Truthtrance window.');
+    const accepted = send(game, 'e', {type:'truthAsk', question:question(family, 'e')});
+    assert.equal(accepted.truthtrance?.question?.kind, family);
+  });