Support native Ix factions in Emperor opening gifts

tests/emperor-ix-native-opening-gift-controls.test.tsx

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+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { registerHooks } from 'node:module';
+import { readFileSync } from 'node:fs';
+import { createElement } from 'react';
+import { renderToStaticMarkup } from 'react-dom/server';
+import { applyAction, createGame, joinGame, newPlayer, viewGame, type Game, type GameView } from '../game/engine';
+import { nextStrongholdFactionsNativeStep } from './fixture-stronghold-factions';
+
+const aliases = registerHooks({
+  resolve(specifier, context, next) {
+    return next(specifier === 'next/image' ? 'vinext/shims/image' :
+      specifier === 'next/link' ? 'vinext/shims/link' : specifier, context);
+  },
+  load(url, context, next) {
+    if (!url.endsWith('.module.css')) return next(url, context);
+    const css = readFileSync(new URL(url), 'utf8');
+    const classes = Object.fromEntries([...css.matchAll(/\.([a-zA-Z_][\w-]*)/g)].map(match => [match[1], match[1]]));
+    return {format:'module', source:`export default ${JSON.stringify(classes)}`, shortCircuit:true};
+  },
+});
+const { GameTable } = await import('../components/game-table');
+aliases.deregister();
+
+/** A native public Basic Ix start and physical setup. Alliance is staged
+ * because the first Storm opening precedes the first Nexus. */
+function opening(ally: 'ixians' | 'tleilaxu'): Game {
+  let game = createGame('IXGIFTUI', newPlayer('emperor', 'Emperor', 'emperor'), false, ['ix']);
+  joinGame(game, newPlayer('ixians', 'Ixians', 'ixians'));
+  joinGame(game, newPlayer('tleilaxu', 'Tleilaxu', 'tleilaxu'));
+  for (const player of game.players) game = applyAction(game, player.id, {type:'ready'});
+  game = applyAction(game, 'emperor', {type:'start'});
+  for (let step = 0; game.status === 'setup' && step < 100; step++) {
+    const next = nextStrongholdFactionsNativeStep(game); assert.ok(next);
+    game = applyAction(game, next.actor, next.action);
+  }
+  assert.equal(game.status, 'playing');
+  assert.equal(game.phase, 0);
+  assert.ok(game.phaseOpening);
+  game.players.find(player => player.id === 'emperor')!.ally = ally;
+  game.players.find(player => player.id === ally)!.ally = 'emperor';
+  return game;
+}
+const table = (game: GameView, busy = false) =>
+  renderToStaticMarkup(createElement(GameTable, {game, busy, send:async () => {}, onExit() {}}));
+
+for (const ally of ['ixians', 'tleilaxu'] as const) {
+  void test(`native ${ally} ally opening shows an enabled owner-only Emperor gift control`, () => {
+    let game = opening(ally);
+    const other = ally === 'ixians' ? 'tleilaxu' : 'ixians';
+    game = applyAction(game, 'emperor', {type:'ready'});
+    const ownView = viewGame(game, 'emperor');
+    assert.deepEqual(ownView.emperorPhaseOpeningGift, {recipient:ally, maximum:10});
+    assert.equal(viewGame(game, ally).emperorPhaseOpeningGift, null);
+    assert.equal(viewGame(game, other).emperorPhaseOpeningGift, null);
+    const own = table(ownView);
+    assert.match(own, /Before Storm/);
+    assert.match(own, new RegExp(`Share spice with ${ally === 'ixians' ? 'Ixians' : 'Tleilaxu'}`));
+    assert.match(own, /Phase opening resumes after the Karama response to your gift/);
+    assert.match(own, /type="number"[^>]*min="1"[^>]*max="10"/);
+    assert.match(own, /<button\b(?![^>]*disabled)[^>]*>Share spice<\/button>/);
+    assert.match(table(ownView, true), /<button\b[^>]*disabled=""[^>]*>Share spice<\/button>/);
+    assert.doesNotMatch(table(viewGame(game, ally)), /Phase opening resumes after the Karama response to your gift/);
+    assert.doesNotMatch(table(viewGame(game, other)), /Phase opening resumes after the Karama response to your gift/);
+
+    // SSR checks the enabled control; dispatch the advertised action through the
+    // same native engine separately, without claiming a browser click occurred.
+    const openingBefore = structuredClone(game.phaseOpening);
+    const next = applyAction(game, 'emperor', {type:'emperorGift', amount:1});
+    assert.ok(next.response || next.phaseOpening);
+    if (!next.response) assert.deepEqual(next.phaseOpening, openingBefore);
+  });
+}