I looked around in the Wine dlls tree to see how many dlls had a "tests" directory in them. Quite a few had, but these did not:
Just thought it could be interesting to see.
. ./advpack ./amstream ./atl ./avicap32 ./avifil32 ./cabinet ./capi2032 ./cards ./cfgmgr32 ./comcat ./commdlg ./crtdll ./crypt32 ./ctl3d ./d3d8 ./d3d9 ./d3dim ./d3drm ./d3dx8 ./d3dxof ./dbghelp ./dciman32 ./devenum ./dinput ./dinput8 ./dmband ./dmcompos ./dmime ./dmloader ./dmscript ./dmstyle ./dmsynth ./dmusic ./dmusic32 ./dplay ./dplayx ./dpnet ./dpnhpast ./dswave ./dxdiagn ./dxerr8 ./dxerr9 ./dxguid ./glu32 ./glut32 ./hhctrl.ocx ./iccvid ./icmp ./ifsmgr.vxd ./imagehlp ./imm32 ./itss ./lzexpand ./mmdevldr.vxd ./monodebg.vxd ./mpr ./msdmo ./mshtml ./msi ./msimg32 ./msisys ./msnet32 ./msrle32 ./msvcrt20 ./msvcrt40 ./msvidc32 ./msvideo ./mswsock ./newdev ./odbc32 ./oleacc ./olecli ./oledlg ./olepro32 ./olesvr ./opengl32 ./qcap ./rasapi32 ./richedit ./secur32 ./serialui ./setupapi ./shdocvw ./shfolder ./snmpapi ./sti ./strmiids ./tapi32 ./ttydrv ./twain ./unicows ./url ./uuid ./uxtheme ./vdhcp.vxd ./vdmdbg ./vmm.vxd ./vnbt.vxd ./vnetbios.vxd ./vtdapi.vxd ./vwin32.vxd ./win32s ./winaspi ./wined3d ./winedos ./wineps ./winnls ./wintab32 ./wintrust ./wow32 ./wsock32 ./x11drv
These have tests: ./advapi32/tests ./comctl32/tests ./ddraw/tests ./dsound/tests ./gdi/tests ./iphlpapi/tests ./kernel/tests ./mapi32/tests ./mlang/tests ./msacm/tests ./mscms/tests ./msvcrt/tests ./msvcrtd/tests ./netapi32/tests ./ntdll/tests ./ole32/tests ./oleaut32/tests ./psapi/tests ./quartz/tests ./rpcrt4/tests ./rsabase/tests ./shell32/tests ./shlwapi/tests ./urlmon/tests ./user/tests ./version/tests ./wininet/tests ./winmm/tests ./winsock/tests ./winspool/tests