Do you need to do unit and integration testing if you already do functional testing? [closed]

Answer 1

Most people are unaware what automated unit tests are for:

1. To experiment with a new technology
2. To document how to use a part of the code
3. To make sure a dead bug stays dead
4. To allow you to refactor the code
5. To allow you to change any major parts of the code
6. Create a lower watermark below which the quality of your product cannot possibly drop
7. Increase development speed because now, you know that something works (instead of hoping it does until a customer reports a bug).

So if any of these reasons bring you a benefit, automated unit tests are for you. If not, then don't waste your time.