TestApi is a library of tools to assist with testing software. One of the tools that comes with it are Fault Injection routines. Fault injection is the process of deliberately putting errors in an app to see if they are handled gracefully.
You can use fault injection to test those hard to reproduce situation. You know the kind. They are the exceptions that only happen once your app has shipped to production.
The two key pieces to TestApi are the "TestApiCore.dll" file, and the FaultInjectionEngine folder. One last note is that fault injection is different than mutation testing. In mutation testing you put an error in you app to see if your unit tests pick it up.
Good luck with your testing. I am currently in the design phase of the software development life cycle. So I don't have a lot of hands on testing just yet.
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