Throughout this course, we will be practicing our testing concepts on a practical application. The application will be a much simplified version of the Twitter app.

The application file structure is summarized below:

• controllers/userController.js contains functions that are used by - - routes/index.js. These functions define what happens when a user visits a specific route.
• models folder contains classes for post and user, which provide utility methods for querying the database. It also contains the database.js script which initializes the database.
• public folder contains all the static files that should be delivered to the user unchanged, without any modification.
• The routes/index.js file defines the routes of our application.
• The views folder contains all the Embedded JavaScript (EJS) templates that are used in our application.
• app.js is the entry point of our application. It contains code for configuring and starting the Express server.

Following are some minimum feature requirements for our end product:

• Ability to Like and Share posts;
• Ability to Follow and View other profiles;
• Profile Management Section;
• Sorting posts by Popularity or Recency;

By the end of the course, all the above-mentioned features will be added to our application and we will have a sufficient amount of test cases for each of those features.