1 files changed, 10 insertions, 0 deletions
diff --git a/test/tutils.py b/test/tutils.py
index dc049adb..05f65a21 100644
--- a/test/tutils.py
+++ b/test/tutils.py
@@ -1,5 +1,7 @@
+from cStringIO import StringIO
 import os, shutil, tempfile, argparse
 from contextlib import contextmanager
+import sys
 from libmproxy import flow, utils, controller
 from libmproxy.protocol import http
 from libmproxy.proxy.connection import ClientConnection, ServerConnection
@@ -185,4 +187,12 @@ def raises(exc, obj, *args, **kwargs):
                 )
     raise AssertionError("No exception raised.")
 
+
+@contextmanager
+def capture_stderr(command, *args, **kwargs):
+    out, sys.stderr = sys.stderr, StringIO()
+    command(*args, **kwargs)
+    yield sys.stderr.getvalue()
+    sys.stderr = out
+
 test_data = utils.Data(__name__)