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Fluint is an evolving project that is now actively being developed by the Flex community. New features that may improve your ability to write tests in a faster and easier way are being added constantly, so be sure to continue to check the documentation and examples on the Fluint site (http://fluint.googlecode.com/).
Remember, creating solid unit and integration tests will ultimately save time during development, refactoring, and most certainly when you need to revise code late in the process. Using the tools available to you in Flex and AIR for testing, you can create stable and testable applications.