There were various issues with the tests at the moment:
* In order to test non-default pixel storage parameters, out-of-bound
array slices were passed to GL functions. That of course cause ASan
to complain (and maybe also some drivers to crash).
* Only the non-default pixel storage parameters were tested.
Unfortunately this is a heavily buggy area in all the drivers, so
when such a test failed, it was not immediately clear whether the
failure is related just to driver not understanding pixel storage
properly or something deeper and made debugging much much harder than
it should be.
* For compressed textures, default and non-default pixel storage has
grossly different code paths and these should be tested both by
default.
* Some test cases had a patched-in code testing for both default and
non-default pixel storage, but the code was so hidden that I didn't
even know it was there -- it should be separate test cases.
All the tests are now instanced, testing both the simple case and
some pixel storage case, they are also reordered and cleaned up a bit.
Vladimír Vondruš
6353761ce9