Dune/tests/coalition-bribe-departure.test.tsx

import assert from 'node:assert/strict';
import test from 'node:test';
import { createElement } from 'react';
import { renderToStaticMarkup } from 'react-dom/server';
import { baseDeck } from '../game/cards';
import { coalitionOf, emptyCoalitionState } from '../game/coalition-alliance';
import { applyAction, createGame, newPlayer, viewGame, type Action, type Game } from '../game/engine';
import { CoalitionNexus, coalitionNexusOptions } from '../components/coalition-nexus';

const send = (game: Game, actor: string, action: Action) => applyAction(game, actor, action);
const seat = (game: Game, id: string) => game.players.find(player => player.id === id)!;

/** The quiet Nexus, wallet and physical Truthtrance are staged. Pair/group
 * formation, question, answer, departure and payment are actual actions. */
function group(): Game {
  let game = createGame('GROUPBRIBE', 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');
  seat(game, 'a').spice = 8;
  game = send(game, 'a', {type:'alliance', target:'b'});
  game = send(game, 'b', {type:'alliance', target:'a'});
  const pair = coalitionOf(game.players, game.coalitionState, 'a'); assert.ok(pair);
  game = send(game, 'a', {type:'coalitionPropose', groupId:pair.id, entrant:'c',
    expectedRevision:game.coalitionState!.revision});
  for (const id of ['b','c']) {
    const offer = game.coalitionState!.proposal!;
    game = send(game, id, {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); seat(game, 'e').hand.push(card);
  return game;
}
function ask(answer: 'yes' | 'no', expression = false): Game {
  let game = group();
  const card = seat(game, 'e').hand.find(row => row.effect === 'truthtrance')!;
  game = send(game, 'e', {type:'card', card:card.id});
  while (game.truthtrance?.stage === 'priority') {
    const passer = game.players.find(player => !game.truthtrance!.passed.includes(player.id)); assert.ok(passer);
    game = send(game, passer.id, {type:'truthPass'});
  }
  const question = expression
    ? {kind:'bribeExpression', target:'a', turn:game.turn, claim:{kind:'and', terms:[
      {kind:'payment', recipient:'d', minimum:2}, {kind:'payment', recipient:'e', minimum:1}]}}
    : {kind:'bribe', target:'a', turn:game.turn, recipient:'d', minimum:2};
  game = send(game, 'e', {type:'truthAsk', question});
  const view = viewGame(game, 'a');
  const answers = expression ? view.truthBribeExpressionAnswers : view.truthBribeAnswers;
  assert.ok(answers?.includes(answer));
  return send(game, 'a', {type:'truthAnswer', answer});
}
function leave(game:Game, actor:string):Game {
  return send(game, actor, {type:'coalitionLeave', expectedRevision:game.coalitionState!.revision});
}
function blockedProposal(game:Game) {
  const alliance = coalitionOf(game.players, game.coalitionState, 'a'); assert.ok(alliance);
  const before = structuredClone(game);
  assert.throws(() => send(game, 'a', {type:'coalitionPropose', groupId:alliance.id,
    entrant:'d', expectedRevision:game.coalitionState!.revision}));
  assert.deepEqual(game, before);
}

void test('a positive bribe answer allows owned group departure and remains payable', () => {
  let game = ask('yes');
  const projected = viewGame(game, 'a').coalitionNexus; assert.ok(projected);
  const options = coalitionNexusOptions(projected);
  assert.equal(options.mayLeave, true);
  assert.ok(options.invitations.every(invitation => invitation.entrant !== 'd'));
  const markup = renderToStaticMarkup(createElement(CoalitionNexus, {view:projected, onIntent:()=>{}}));
  assert.match(markup, /Leave/);
  blockedProposal(game);
  game = leave(game, 'a');
  assert.equal(coalitionOf(game.players, game.coalitionState, 'a'), null);
  assert.deepEqual(coalitionOf(game.players, game.coalitionState, 'b')!.members, ['b','c']);
  const promise = game.bribePromises!.find(row => row.player === 'a')!;
  assert.equal(promise.released ?? false, false);
  const guide = viewGame(game, 'a').bribePromiseGuide; assert.ok(guide);
  assert.equal(guide.action.type, 'bribe'); assert.equal(guide.action.target, 'd');
  game = send(game, 'a', guide.action);
  assert.equal(game.bribePromises!.find(row => row.event === promise.event)!.fulfilled, true);
  assert.equal(seat(game, 'd').bribes, 2);
});

void test('a negative bribe answer survives another member departing and retains its cap', () => {
  let game = ask('no');
  game = leave(game, 'b');
  assert.deepEqual(coalitionOf(game.players, game.coalitionState, 'a')!.members, ['a','c']);
  const before = structuredClone(game);
  assert.throws(() => send(game, 'a', {type:'bribe', target:'d', amount:2}));
  assert.deepEqual(game, before);
  game = send(game, 'a', {type:'bribe', target:'d', amount:1});
  assert.equal(seat(game, 'd').bribes, 1);
  assert.equal(game.bribePromises!.find(row => row.player === 'a')!.released ?? false, false);
});

void test('a positive bribe expression remains binding and payable after departure', () => {
  let game = ask('yes', true);
  blockedProposal(game);
  game = leave(game, 'a');
  const promise = game.bribeExpressionPromises!.find(row => row.player === 'a')!;
  assert.equal(promise.released ?? false, false);
  for (let step = 0; step < 2; step++) {
    const guide = viewGame(game, 'a').bribePromiseGuide; assert.ok(guide);
    game = send(game, 'a', guide.action);
  }
  assert.equal(game.bribeExpressionPromises!.find(row => row.event === promise.event)!.fulfilled, true);
  assert.equal(seat(game, 'd').bribes, 2); assert.equal(seat(game, 'e').bribes, 1);
});