### Example Controller
```js
import { Request, Response } from 'express';
import MessageSender form '../Services/MessageSender';

/**
 * Example controller that provides a healthcheck endpoint
 */
module Example {

  'use strict';

  /*
   * Return an empty 200 response
   */
  export function someMethod (req: Request, res: Response) {
    const messageSender = this._messageSender || new MessageSender();

    messageSender.SendMessage("hello world!")
      .then(() => res.end);
  }

}

export = Example;
```

# Example Controller Tests
```js
import sinon from 'sinon';
import sinonStubPromise from 'sinon-stub-promise';
import { someMethod } from './Example';

sinonStubPromise(sinon);

describe('Example Controller', () => {
  describe('someMethod', () => {
    it('should send a message', () => {
      const sendMessagePromise = sinon.stub().returnsPromise();

      const messageSenderMock = {
        sendMessage: (message) => {
          sendMessagePromise.resolves({sid: 'MSXXXXXXXXXXXXXXXXXXXXXXXXX', body: message});
        }
      };


      someMethod._messageSender = messageSenderMock;

      someMethod({}, {});

      expect(sendMessagePromise.resolved).to.eql({sid: 'MSXXXXXXXXXXXXXXXXXXXXXXXXX', body: 'hello world!'});
    });
  })
});