safe-regex-test 
Give a regex, get a robust predicate function that tests it against a string. This will work even if RegExp.prototype is altered later.
Getting started
npm install --save safe-regex-test
Usage/Examples
var regexTester = require('safe-regex-test');
var assert = require('assert');
var tester = regexTester('a');
assert.ok(tester('a'));
assert.notOk(tester('b'));
Tests
Simply clone the repo, npm install, and run npm test