testsuite: improve assert report
testsuite: improve assert report

lpereira/kmod,pmmccorm/kmod,lpereira/kmod,Distrotech/kmod,lpereira/kmod,lucasdemarchi/kmod,Distrotech/kmod,pmmccorm/kmod,Distrotech/kmod,pmmccorm/kmod,lucasdemarchi/kmod,lucasdemarchi/kmod