Validate battle save unit roster

scripts/verify-battle-save-normalization.mjs

@@ -14,7 +14,8 @@ try {
   const options = {
     expectedBattleId: 'first-battle-zhuo-commandery',
     mapWidth: 12,
-    mapHeight: 8
+    mapHeight: 8,
+    validUnitIds: new Set(['liu-bei'])
   };
   const validState = createValidBattleSaveState();
 
@@ -40,6 +41,8 @@ try {
     ['invalid unit hp', { units: [{ ...validState.units[0], hp: 99, maxHp: 30 }] }],
     ['invalid unit x', { units: [{ ...validState.units[0], x: 12 }] }],
     ['invalid unit direction', { units: [{ ...validState.units[0], direction: 'down' }] }],
+    ['unknown unit id', { units: [{ ...validState.units[0], id: 'ghost-unit' }] }],
+    ['duplicate unit id', { units: [{ ...validState.units[0] }, { ...validState.units[0], x: 2 }] }],
     ['invalid bonds', { bonds: [{ ...validState.bonds[0], unitIds: ['liu-bei'] }] }],
     ['invalid item stock count', { itemStocks: { 'liu-bei': { bean: -1 } } }],
     ['invalid buff turns', { battleBuffs: [{ ...validState.battleBuffs[0], turns: 0 }] }],
@@ -54,6 +57,11 @@ try {
     assert(!isValidBattleSaveState(candidate, options), `Expected invalid battle save to be rejected: ${label}`);
   });
 
+  assert(
+    !isValidBattleSaveState(validState, { ...options, validUnitIds: new Set(['liu-bei', 'guan-yu']) }),
+    'Expected save missing a current battle unit to be rejected.'
+  );
+
   console.log('Verified battle save normalization and corrupted battle save rejection.');
 } finally {
   await server.close();