doc,tools,test: lint doc-based addon tests

PR-URL: https://github.com/nodejs/node/pull/5427
Fixes: https://github.com/nodejs/node/issues/5424
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>

tools/doc/addon-verify.js

@@ -71,6 +71,12 @@ function verifyFiles(files, blockName, onprogress, ondone) {
   );
 
   files = Object.keys(files).map(function(name) {
+    if (name === 'test.js') {
+      files[name] = `'use strict';
+require('../../common');
+${files[name]}
+`;
+    }
     return {
       path: path.resolve(dir, name),
       name: name,