Don't test against file perms when running as root (#86)

* Don't test against file perms when running as root

test_permissionDenied tests file modes by creating a temporary file, then sets the mode to 0000 and attempts to process it and see if and permission denied error is generated.  This never happens when the unit tests are run as root since it can open files regardless of file permissions.

* Fix up UID skip in tests for Windows

Author: cfs-pure

pyflakes/test/test_api.py

@@ -518,6 +518,9 @@ def test_permissionDenied(self):
         If the source file is not readable, this is reported on standard
         error.
         """
+        if os.getuid() == 0:
+            self.skipTest('root user can access all files regardless of '
+                          'permissions')
         sourcePath = self.makeTempFile('')
         os.chmod(sourcePath, 0)
         count, errors = self.getErrors(sourcePath)