Add mocha nodejs version of the code.

js/mocha/test/test_gilded_rose.js

@@ -0,0 +1,11 @@
+var {expect} = require('chai');
+var {Shop, Item} = require('../src/gilded_rose.js');
+describe("Gilded Rose", function() {
+
+  it("should foo", function() {
+    const gildedRose = new Shop([ new Item("foo", 0, 0) ]);
+    const items = gildedRose.updateQuality();
+    expect(items[0].name).to.equal("fixme");
+  });
+
+});