tests: make test-walkrepo use hg's symlink test

tests/test-walkrepo.py

@@ -1,52 +1,53 b''
 import os
 from mercurial import hg, ui
 from mercurial.scmutil import walkrepos
+from mercurial.util import checklink
 from os import mkdir, chdir
 from os.path import join as pjoin
 
 u = ui.ui()
-sym = getattr(os, 'symlink', False) and getattr(os.path, 'samestat', False)
+sym = checklink('.')
 
 hg.repository(u, 'top1', create=1)
 mkdir('subdir')
 chdir('subdir')
 hg.repository(u, 'sub1', create=1)
 mkdir('subsubdir')
 chdir('subsubdir')
 hg.repository(u, 'subsub1', create=1)
 chdir(os.path.pardir)
 if sym:
     os.symlink(os.path.pardir, 'circle')
     os.symlink(pjoin('subsubdir', 'subsub1'), 'subsub1')
 
 def runtest():
     reposet = frozenset(walkrepos('.', followsym=True))
     if sym and (len(reposet) != 3):
         print "reposet = %r" % (reposet,)
         print "Found %d repositories when I should have found 3" % (len(reposet),)
     if (not sym) and (len(reposet) != 2):
         print "reposet = %r" % (reposet,)
         print "Found %d repositories when I should have found 2" % (len(reposet),)
     sub1set = frozenset((pjoin('.', 'sub1'),
                          pjoin('.', 'circle', 'subdir', 'sub1')))
     if len(sub1set & reposet) != 1:
         print "sub1set = %r" % (sub1set,)
         print "reposet = %r" % (reposet,)
         print "sub1set and reposet should have exactly one path in common."
     sub2set = frozenset((pjoin('.', 'subsub1'),
                          pjoin('.', 'subsubdir', 'subsub1')))
     if len(sub2set & reposet) != 1:
         print "sub2set = %r" % (sub2set,)
         print "reposet = %r" % (reposet,)
         print "sub1set and reposet should have exactly one path in common."
     sub3 = pjoin('.', 'circle', 'top1')
     if sym and not (sub3 in reposet):
         print "reposet = %r" % (reposet,)
         print "Symbolic links are supported and %s is not in reposet" % (sub3,)
 
 runtest()
 if sym:
     # Simulate not having symlinks.
     del os.path.samestat
     sym = False
     runtest()