spec: Add test case for #5028

spec/node-spec.js

@@ -196,6 +196,11 @@ describe('node feature', function () {
       assert.equal(b.toString(), 'Jøhänñéß')
       assert.equal(Buffer.byteLength(p.innerText), 13)
     })
+
+    it('does not crash when creating large Buffers', function () {
+      new Buffer(new Array(4096).join(' '));
+      new Buffer(new Array(4097).join(' '));
+    })
   })
 
   describe('process.stdout', function () {