Check imported world size, buffers, materials and block codes (t80)

test/t_fog.js

@@ -20,7 +20,13 @@ check('save/load keeps fog', run('(()=>{fogLook(bot.x+bot.w/2,bot.y+bot.h/2);con
 rect(run, 200, 160, 203, 163, run('EMPTY'));
 run('placeBlock(BP_WALL, RSTONE, 50, 40, true)');
 check('old save rebuilds exploration', run('(()=>{const s=serializeWorld();delete s.buffers.fog;deserializeWorld(s.meta,s.buffers);return fogSeen(62,104)>=200 && fogSeen(202,162)===255 && fogSeen(20,220)===0})()'));
-check('wrong length fog rebuilds exploration', run('(()=>{const s=serializeWorld();s.buffers.fog=new Uint8Array(1);deserializeWorld(s.meta,s.buffers);return fogSeen(202,162)===255})()'));
+check('wrong length fog is refused without changing exploration', run(`(() => {
+  const s = serializeWorld(), originalFog = fog, originalMat = mat;
+  s.buffers.fog = new Uint8Array(1);
+  try { deserializeWorld(s.meta, s.buffers); }
+  catch (e) { return /fog/i.test(e.message) && fog === originalFog && mat === originalMat && fogSeen(202,162) === 255; }
+  return false;
+})()`));
 const hash = () => run('mat.reduce((h,v)=>Math.imul(h^v,16777619)>>>0,2166136261)');
 run('generateWorld(42, 256, 256, null)'); ticks(run, 300); const h = hash();
 run('generateWorld(42, 256, 256, null); fogLook = function () {}'); ticks(run, 300);