skip tests on windows that don't make sense

test/test_proxy.py

@@ -133,6 +133,7 @@ class TestProcessProxyOptions:
 
 
 class TestProxyServer:
+    @tutils.SkipWindows # binding to 0.0.0.0:1 works without special permissions on Windows
     def test_err(self):
         parser = argparse.ArgumentParser()
         cmdline.common_options(parser)

test/tutils.py

@@ -2,7 +2,15 @@ import os, shutil, tempfile
 from contextlib import contextmanager
 from libmproxy import flow, utils, controller
 from netlib import certutils
-import mock
+from nose.plugins.skip import SkipTest
+
+def _SkipWindows():
+    raise SkipTest("Skipped on Windows.")
+def SkipWindows(fn):
+    if os.name == "nt":
+        return _SkipWindows
+    else:
+        return fn
 
 def treq(conn=None):
     if not conn: