Summary

This chapter covered automated testing such as unit and integration tests. We also briefly covered end-to-end tests, but it would be tough to cover that in a few pages since this is tied to an application and its implementation. Nonetheless, all is not lost since the notions covered to write integration tests can also be used for end-to-end testing.

We looked at xUnit, the testing framework used throughout the book, and a way of organizing tests. We explored ways to pick the correct type of test and some guidelines about choosing the right quantity of each kind of test. Then we saw how ASP.NET Core makes it easier than ever before to test our web applications by allowing us to mount and run our ASP.NET Core application in memory. Finally, we explored some high-level concepts that should guide you in writing testable, flexible, and reliable programs.

Now that we have talked about testing, we are ready to explore a few architectural principles to help us increase programs...