In this chapter, we took a brief look at how APIs work in general, the RESTful API approach to semantic URL paths and arguments, and created a bare bones API. We used Postman REST Client to interact with the API by consuming endpoints and testing the different types of request methods (
PUT, and so on). You also learned how to consume an external API endpoint by using the third-party node module Request.
In the next chapter, we will revisit our original application as we implement best practices by introducing testing in Node.js. We'll take a look at popular testing frameworks and write tests for the application to prove that our code works as expected.