Adobe Air

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. FlexUnit 4 was created to modernize testing with ActionScript 3.0 and Flex, bringing parity with the tools and techniques available to the Java community. It provides full support for unit testing in the tradition of FlexUnit .9 , but goes further with rich asynchronous support, meta-data defined testing, support for integration-level testing and an extensibility layer for new types and methods of testing.