There are a few options, and which tool works for you depends on your specific circumstance, so heres a list of the ones I've seen used;
- FlexMonkey - Provides an IDE recorder, test case exporting and can be integrated into CI tools such as Jenkins using its ANT tasks.
- Pros: Creates FlexUnit test cases
- Cons: Doesn't play well with custom components or very complex interfaces
- Sikuli - Doesn't test Flash as such, but uses Image Recognition tech to recognise buttons/layout elements etc, and can control any application
- Pros: Can interact on anything the user can see
- Cons: Struggles with highly variable interfaces (dynamic backdrops, etc) and doesn't allow you to validate text very easily (ie you can't do things like; assertThat(page.getTitle(), is(equalTo("Some Expected Title")));
- flash-seleniumflash-selenium - An extension to the very popular Selenium test system
- Pros : Lets you maintain a common work flow if you're using Flash within other html content
- Cons : Requires building a Selenium version of the flash application