Why should I bother with unit testing if I can just use integration tests?

Question

Ok, I know I am going out on a limb making a statement like that, so my question is for everyone to convince me I am wrong. Take this scenario:

I have method A, which ca

Answer 1

Reinforcing(hopefully) Samuel Carrijo's post...

---

When choosing between: 1) unit tests AND a small integration test vs 2) just the integration test you are making a calculated bet. If the integrated component is complex then any failure in the integration test is going to be tricky to figure out to find without unit tests. Sometimes I get it wrong, get a test failure in the integration test and start writing the unit tests without trying to debug. If you bet on not needing unit tests and win, you can save yourself a fair amount of time, and still have confidence in your code, but you don't get the "specification" benefits that unit tests provide to the next guy who has to touch your code.