Add test

Author: anttiai

test/util.js

@@ -4,7 +4,6 @@ var util = require('../src/util');
 
 describe('util', function() {
   describe('isFunction', function() {
-
     it('function should be properly detected', function() {
       var f = function(f) { console.log(f); };
       assert.equal(util.isFunction(f), true);
@@ -14,4 +13,11 @@ describe('util', function() {
     });
 
   });
+
+  describe('base64', function() {
+    it('string should be encoded properly', function() {
+      assert.equal(util.base64('test'), 'dGVzdA==');
+    });
+
+  });
 });