Make NoValidConnectionsError picklable correctly

Fixes #617.

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/test_ssh_exception.py b/tests/test_ssh_exception.py
new file mode 100644
index 00000000..2d1f899f
--- /dev/null
+++ b/tests/test_ssh_exception.py
@@ -0,0 +1,15 @@
+import pickle
+import unittest
+
+from paramiko.ssh_exception import NoValidConnectionsError
+
+
+class NoValidConnectionsErrorTest (unittest.TestCase):
+
+    def test_pickling(self):
+        # Regression test for https://github.com/paramiko/paramiko/issues/617
+        exc = NoValidConnectionsError({'ab': ''})
+        new_exc = pickle.loads(pickle.dumps(exc))
+        self.assertEqual(type(exc), type(new_exc))
+        self.assertEqual(str(exc), str(new_exc))
+        self.assertEqual(exc.args, new_exc.args)