AsUnit verses FlexUnit – which is “better”?

Question

I'm learning ActionScript/Flex at the moment, and it's come time for me to start unit testing. My reading shows that there are two main frameworks out there: FlexUnit and AsUnit.

Is there any reason to learn one over the other? Is one, in some way, "better"?

Answer 1

There is also fluint, which was created in order to address issues that developers were running into using FlexUnit.

Because of new FlexUnit tooling support in the upcoming FlashBuilder 4 release from Adobe, the fluint project and the FlexUnit project have merged to create a new unit testing suite now dubbed FlexUnit 4.0. The FlashBuilder IDE will support FlexUnit 4.0 at the tool-level. This new tooling support, coupled with some of the great new features of FlexUnit 4.0, make the new FlexUnit the clear choice for unit testing in ActionScript 3 and Flex code.

Answer 2

I think it depends on the kind of ActionScript development you're doing. AsUnit has a wider set a supported versions.

FlexUnit looks as though it has a better backing through Adobe. If you're focusing on Flex development (or strictly AS3), I'd probably go with FlexUnit.

Answer 3

As a followup to this question, I have been using FlexUnit for the last bunch of months, and it (along with Drew Bourn's awesome hamcrest-as3) has been making me very happy.