[pygobject] tests: test genum __reduce__ implementation

[Christoph Reiter <creiter src gnome org>]

commit fac77fd317d280ec13851eec04e52e1e56d860d7
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Mon Mar 19 23:34:16 2018 +0100

    tests: test genum __reduce__ implementation

 tests/test_gi.py | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/tests/test_gi.py b/tests/test_gi.py
index 8b355ebd..91f4ffc7 100644
--- a/tests/test_gi.py
+++ b/tests/test_gi.py
@@ -13,6 +13,7 @@ import os
 import gc
 import weakref
 import warnings
+import pickle
 
 import gi
 import gi.overrides
@@ -1844,6 +1845,12 @@ class TestGEnum(unittest.TestCase):
         self.assertTrue(isinstance(GIMarshallingTests.GEnum.VALUE3, GIMarshallingTests.GEnum))
         self.assertEqual(42, GIMarshallingTests.GEnum.VALUE3)
 
+    def test_pickle(self):
+        v = GIMarshallingTests.GEnum.VALUE3
+        new_v = pickle.loads(pickle.dumps(v))
+        assert new_v == v
+        assert isinstance(new_v, GIMarshallingTests.GEnum)
+
     def test_value_nick_and_name(self):
         self.assertEqual(GIMarshallingTests.GEnum.VALUE1.value_nick, 'value1')
         self.assertEqual(GIMarshallingTests.GEnum.VALUE2.value_nick, 'value2')