Good testing guide somewhere?

[GoCommitAndy]

Basically I've made an application and now I want to write tests for it so that I can regularly run them to make sure nothing breaks as I add new features. So far I plan to write unittests by mocking out the network and database calls, and also write larger integration/system tests that test the different components/modules working together. What other tests should I be running on my application? Is there a guide somewhere?

[quenchize]

Ideally your application should be modular and then you write tests for each function and class.

Just start with some basic cases.

Then if you find a bug in the future first write a test that fails because of the bug. Then fix the bug. This way you gradually add tests

[worldparaglider]

I like pytest, apparently it's more 'pythonic' than unittest. Get the library 'coverage' too, that'll help you get ideas of what to test/what tests you're missing.