Core features implemented.

tests/helpers/contains.spec.js

@@ -0,0 +1,10 @@
+var chai = require('chai');
+var expect = chai.expect;
+
+import contains from '../../assets/js/helpers/contains';
+
+describe('contains', function() {
+    it('should be a function', function() {
+        expect(contains).to.be.a('function');
+    });
+});