Verify global.Buffer is undefined

spec/fixtures/module/preload-required-module.js

@@ -1,5 +1,5 @@
 try {
-  console.log([typeof process, typeof setImmediate, typeof global, typeof Buffer].join(' '))
+  console.log([typeof process, typeof setImmediate, typeof global, typeof Buffer, typeof global.Buffer].join(' '))
 } catch (e) {
   console.log(e.message)
 }

spec/webview-spec.js

@@ -193,7 +193,7 @@ describe('<webview> tag', function () {
 
     it('preload script can require modules that still use "process" and "Buffer" when nodeintegration is off', function (done) {
       webview.addEventListener('console-message', function (e) {
-        assert.equal(e.message, 'object undefined object function')
+        assert.equal(e.message, 'object undefined object function undefined')
         done()
       })
       webview.setAttribute('preload', fixtures + '/module/preload-node-off-wrapper.js')