Tests 'checkout of long paths without core.longpaths fails' and 'checkout of long paths with core.longpaths works' with message "file longpa~1/longtestfile does not exist" if 8.3 file name creation is disabled, like described here: http://support.microsoft.com/en-us/kb/121007
That is expected. The unit tests should recapitulate the common setups, and on common setups the 8.3. file name support is enabled. I am sure you agree!
Tests
'checkout of long paths without core.longpaths fails'
and'checkout of long paths with core.longpaths works'
with message "file longpa~1/longtestfile does not exist" if 8.3 file name creation is disabled, like described here: http://support.microsoft.com/en-us/kb/121007