How do you test your code?

This mini-series is for people who don't have the time to delve into the way you'd write tests for your Python code, but would like to get a quick overview of the possibilities.

However before we can get into actually testing things, it is worth to think about and even to discuss the following questions.

• What kind of things do you test?

• Web application?

• Command line application?

• Databases?

• ...