Improve the testing situation on Windows....

tests/fake_repos.py

 #!/usr/bin/python
 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Generate fake repositories for testing."""
 
 import atexit
 import errno
 import logging
@@ skipping 268 matching lines @@
         if not os.path.isdir(p):
           os.makedirs(p)
       if v is None:
         os.remove(join(root, k))
       else:
         write(join(root, k), v)
 
   def setUpSVN(self):
     """Creates subversion repositories and start the servers."""
     if self.svnserve:
-      return
+      return True
     self.setUp()
     root = join(self.repos_dir, 'svn')
-    check_call(['svnadmin', 'create', root])
+    try:
+      check_call(['svnadmin', 'create', root])
+    except OSError:
+      self.svn_enabled = False
+      return False
     write(join(root, 'conf', 'svnserve.conf'),
         '[general]\n'
         'anon-access = read\n'
         'auth-access = write\n'
         'password-db = passwd\n')
     write(join(root, 'conf', 'passwd'),
         '[users]\n'
         'user1 = foo\n'
         'user2 = bar\n')
 
     # Start the daemon.
     cmd = ['svnserve', '-d', '--foreground', '-r', self.repos_dir]
     if self.HOST == '127.0.0.1':
       cmd.append('--listen-host=127.0.0.1')
     self.svnserve = Popen(cmd, cwd=root)
     self.populateSvn()
+    return True
 
   def populateSvn(self):
     """Creates a few revisions of changes including DEPS files."""
     # Repos
     check_call(['svn', 'checkout', 'svn://127.0.0.1/svn', self.svn_root, '-q',
                 '--non-interactive', '--no-auth-cache',
                 '--username', 'user1', '--password', 'foo'])
     assert os.path.isdir(join(self.svn_root, '.svn'))
     def file_system(rev, DEPS):
       fs = {
@@ skipping 343 matching lines @@
 
 
 # Kind of hack.
 if '-l' in sys.argv:
   FakeRepos.SHOULD_LEAK = True
   sys.argv.remove('-l')
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))