Serious applications need robustness, and you will now have a grasp of unit testing in Dart to aid in the rapid production of quality software. We have also covered how to log vital operation details, categorized to the correct level, for long-term monitoring of a system.

Connecting Dart to a serious database is critical for many applications, and you can now carry this out using an industrial-strength database system. You now have the skills to connect to a remote web service to collect real data.

In the next chapter, our exploration of database systems will cover extracting the data into our application, and we will mine this constantly updating data store to populate a rich data grid view of the incoming data, which will be updated in real time.