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2014-06-22 23:18

Martin Piper

Registered: Nov 2007
Posts: 722

Automatic regression testing

At the moment what I do for automatic regression of multiplexor code is to have an external process capture thousands of lossless screenshots of the VICE window as it is running.

Meanwhile the C64 code will run through an endless cycle of animating sprite formations while mainline running code that uses different length opcodes across the frames. This is to ensure that any raster IRQs are triggered at different scan line cycle offsets. It basically causes jitter to make sure the multiplexor doesn't unexpectedly cause visual bugs when being used.

I then post process these screenshots and have some code to detect any sprite bugs, it then detects the frame count which is displayed in the background at certain points.

However this isn't that optimal because it means I have to re-run the test and advance to that frame count to try to debug the code. It also takes ages since VICE has to be running and generating non-warp video output to a Window.

What would be ideal is to be able to run VICE in warp console mode and to be able to reliably do the following:
Every frame:
Break point at the bottom of the screen.
Dump a BMP.
Wait for the external tool to regression test.
If there is a problem save a snapshot with CPU execution history that contains exact cycle counts.
Continue the test and keep logging test data.

Does anybody else do this with the Windows build?

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