I'm new to AS3 and Flex, but I am creating a mobile app with them in FlashDevelop. I want to add some unit tests, but I can't find any really good frameworks or documentation on it. I saw a little bit on FlexUnit and AsUnit, but both seem to be a few years old, and there isn't much documentation on using them in FlashDevelop.
Is there a good framework I can use for unit testing here? Even if I can't test the UI layer, I'd like to at least make sure my backend functions work correctly.
If you are testing backend functions, then you generally want to use the testing framework of whatever backend you are using. If you want Flex to test your backend functions, then you aren't Unit Testing, you are Integration Testing. While FlexUnit seems old, it still performs well at serving its purpose. The usage of FlexUnit should be independent of your IDE, you may just have to do more typing.