Building a Business Central application is only one of the responsibilities of a good developer. Testing and debugging that application to ensure high-quality user experience is another—and an extremely important—task that all developers need to do throughout the life of the application.

We're going to cover some topics that will show you how to diagnose issues in your application, as well as steps you can take during the development phase to try and weed out all of those issues before your application gets into the customers' hands.

In this chapter, we'll cover the following recipes:

• Introducing the debugger
• Debugging SQL
• The Automated Testing Toolkit
• Creating a test application
• Creating automated tests
• Testing the UI
• UI handlers
• Creating a test library