Node.js 8 the Right Way

Wrapping Up

This chapter explored how to write socket-based networked applications in Node. We developed both ends of a server/client interaction and created a JSON-based protocol for them to communicate.

When our assumptions about the protocol began to fail us, we developed a test case to expose the problem. You wrote a custom Node.js module that extended EventEmitter, a core Node.js class. You also learned one technique for buffering streamed data and incrementally scanning it for messages.

Using npm, you installed Mocha, a popular test framework, and used it to develop a unit test.

Writing simple networked applications in Node.js, like those in this chapter, doesn’t take very much code. After only a few lines, you have a functioning server ...