Further reading

If you'd like to deepen your knowledge about testing and deploying of applications, you might find the following books interesting:

For a standard treatment of TDD, I'd recommend Test Driven Development: By Example, book by K Beck, Addison-Wesley Professional (2002).

Mastering Qt 5, by G. Lazar and R. Penea, Packt Publishing (2018) contains an introductory chapter on the Qt Test framework and another one discussing the packaging of Qt applications on Windows, Linux, OS X, Android, and iOS.