add a test that printLogo printed to console

test/printLogo.specs.js

@@ -0,0 +1,18 @@
+var stubHelper = require('./stubs/stubHelper');
+var expect    = require('chai').expect;
+
+describe('printLogo', function() {
+
+  it('should print logo if called to console log', function() {
+    stubHelper(function() {
+      var didRun = false;
+      console.log = function() { didRun = true; };
+
+      // run the file
+      var printLogo = require('../printLogo');
+      printLogo();
+
+      expect(didRun).to.be.true;
+    });
+  });
+});

test/stubs/stubHelper.js

@@ -0,0 +1,14 @@
+module.exports = function helper(fn) {
+  var originalConsoleLog = console.log;
+
+  function restore() {
+    console.log = originalConsoleLog;
+  }
+
+  if (fn.length) {
+    fn(restore);
+  } else {
+    fn();
+    restore();
+  }
+};