Connect three-deck Nexus Kull and Ixian Semuta

tests/kull-nexus-e3-default.test.ts

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+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { kullDefaultProfile, type KullDefaultProfile } from '../game/kull-default-profile';
+
+const lobby: KullDefaultProfile = {
+  status: 'lobby', advanced: false, expansions: ['ix', 'choam', 'ecaz'],
+  players: [{faction:'choam'}, {faction:'richese'}, {faction:'atreides'}],
+  nexusCards: {cards:null, phase:null},
+};
+
+void test('Basic three-deck Nexus Kull quote accepts selected and unused native families', () => {
+  for (const extra of [[], ['ecaz'], ['moritani'], ['ecaz','moritani'], ['ixians','ecaz','moritani']]) {
+    const input = {...lobby, players:[...lobby.players, ...extra.map(faction => ({faction}))]};
+    const original = structuredClone(input);
+    assert.deepEqual(kullDefaultProfile(input), {eligible:true, reason:null});
+    assert.deepEqual(input, original);
+    assert.equal(kullDefaultProfile({...input, nexusCards:undefined,
+      lobbyModules:{nexusCards:true}}).eligible, true);
+  }
+  // Eligibility describes the available option; the caller owns host opt-out.
+  const options = {leaderSkills:false, kullOptOut:true};
+  assert.equal(kullDefaultProfile({...lobby, lobbyOptions:options}).eligible, true);
+});
+
+void test('Three-deck Nexus Kull quote preserves public roster and module restrictions', () => {
+  const invalid: Partial<KullDefaultProfile>[] = [
+    {advanced:true}, {status:'playing'},
+    {expansions:['ix','choam','choam']}, {expansions:['ix','choam','unknown']},
+    {expansions:['ix','choam'], players:[{faction:'choam'}, {faction:'ecaz'}]},
+    {players:[{faction:'choam'}, {faction:'ecaz'}, {faction:'ecaz'}]},
+    {players:[{faction:'ecaz'}, {faction:'richese'}]},
+    {lobbyOptions:{ecazTreachery:true}}, {lobbyOptions:{leaderSkills:true}},
+    {lobbyModules:{nexusCards:true, ecazTreachery:true}},
+    {lobbyModules:{nexusCards:true, discoveries:true}},
+    {homeworlds:{}}, {techTokens:{}}, {strongholdCards:{}}, {discoveryEnabled:true},
+    {discoveries:{}}, {discoveryStash:{}}, {greatMaker:{}}, {sandtrout:{}},
+  ];
+  for (const variant of invalid) {
+    const result = kullDefaultProfile({...lobby, ...variant});
+    assert.equal(result.eligible, false, JSON.stringify(variant));
+    assert.ok(result.reason, 'Unavailable configurations need a readable reason');
+  }
+});
+
+void test('Three-deck Nexus Kull eligibility never reads private cards or funds', () => {
+  const ecaz = {faction:'ecaz', get hand() {throw Error('private hand read');},
+    get spice() {throw Error('private spice read');}};
+  assert.equal(kullDefaultProfile({...lobby, players:[{faction:'choam'},ecaz]}).eligible, true);
+});