How to unit test with lots of IO

Posted by Eric on Programmers See other posts from Programmers or by Eric
Published on 2012-06-03T06:08:19Z Indexed on 2012/06/03 10:47 UTC
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Filed under:

c++

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TDD

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linux

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embedded

I write Linux embedded software which closely integrates with hardware.

My modules are such as :

-CMOS video input with kernel driver (v4l2)
-Hardware h264/mpeg4 encoders (texas instuments)
-Audio Capture/Playback (alsa)
-Network IO

I'd like to have automated testing for those functionalities, such as integration testing. I am not sure how I can automate this process since most of the top level functionalities I face are IO bound. Sure, it is easy to test functions individually, but whole process checking means depending on tons of external dependencies only available at runtime.

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