It's considered good practice to test various flows through your app/site to make sure things behave as expected when users interact with them. But even so, when hacking together an early version of an idea (or sometimes even a "polished" product), it's too often the case that we build and worry about automated testing later, if at all.
Do you use any automated testing tools or testing services on your projects? If so, which ones? Or do you live in blissful ignorance that something might break in your beloved work of heart?
Would love to hear from you!