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-rw-r--r--Lib/test/test_collections.py9
1 files changed, 9 insertions, 0 deletions
diff --git a/Lib/test/test_collections.py b/Lib/test/test_collections.py
index 1e23d5b..60d4e0b 100644
--- a/Lib/test/test_collections.py
+++ b/Lib/test/test_collections.py
@@ -719,6 +719,15 @@ class TestOrderedDict(unittest.TestCase):
self.assertEquals(len(dup), len(od))
self.assertEquals(type(dup), type(od))
+ def test_yaml_linkage(self):
+ # Verify that __reduce__ is setup in a way that supports PyYAML's dump() feature.
+ # In yaml, lists are native but tuples are not.
+ pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)]
+ od = OrderedDict(pairs)
+ # yaml.dump(od) -->
+ # '!!python/object/apply:__main__.OrderedDict\n- - [a, 1]\n - [b, 2]\n'
+ self.assert_(all(type(pair)==list for pair in od.__reduce__()[1]))
+
def test_repr(self):
od = OrderedDict([('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)])
self.assertEqual(repr(od),