Regression test (or generic tests) for Linux filesystems

Hello all,

Just a quick question. I am wondering if there is any test suite
available for ext4 fs or basic fs functionalists in Linux, shipped
with kernel as a module or so, then developers would be able to run
the test (or modify them for new features) to ensure fs integrity on a
local branch before submitting a patch for review?

I have already found xfstests at:

https://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git/tree/

but I am not sure if this is the right one (haven't tried yet) or if
there is any better test suite even more specific tailored for ext4.

Thanks for your answer,

Dan