To make sure everything works as intended, even if big parts of our ship change in the future, we write some tests next. A great framework like Sails.js has our back when it comes to testing our code.

Next we'll have a look at authentication and policies. These two in combination will make sure that nobody enters our ship without permission. So let's secure our planks, arrrrrr.

Now comes one of my most anticipated feature so far: WebSockets. They allow real-time communication without the need of reloading the browser or use periodical ajax calls. Let's get into some magic!

In this part you will learn about services. They are very important to keep your controllers lean and organized. In addition, services are re-usable units that allow you to stick to the DRY pattern (don't repeat yourself).