How to Test Classes

In everyday work, we often need to deal with classes (MDN article). Some examples might be one of the following:

• A Node.js API endpoint handler (server side).
• An SPA Component class (client side).

These often include dependencies that are injected in the constructor and used throughout the methods in the class instance.

We’ll look into a class with one dependency and one method that uses that dependency.

The Article class

What follows is a very simplified example of a class that handles deleting articles in a browser application. It accepts some input and makes a request to a server API if conditions are met.