In the previous chapters, you’ve learned how to build a robust database solution. You’ve even seen how to move your code into layers to create a SOLID architecture. However, one major piece of the puzzle is missing to this point. Likely, this should have been included much earlier in the book. However, it’s now time to make sure that you have one of the final pieces of the puzzle to make a production-ready database. That missing piece is unit and integration testing.