proxyquireUtilsTest.js

var proxyquire = require('proxyquire');

describe('utils#getString', function() {
  it('should print helper.msg', function() {
    var HelperStub = {
      msg: 'stub msg'
    };
 
    var utils = proxyquire('../server/utils', {
      './helper': HelperStub
    });
 
    assert.equal(utils.getString(), 'stub msg');
  });
});