FlexUnitHome FlexUnit is a unit testing framework for Flex and ActionScript 3.0 applications and libraries. It mimics the functionality of JUnit, a Java unit testing framework, and comes with a graphical test runner. Features FlexUnit 4 is meta-data driven allowing you to have extreme freedom and ease when creating tests. Please check out the features section to find out more.
CompactCode.com
http://www.compactcode.com/index.php/2009/08/unit-testing-flex-mocking/
