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gh-100272: Fix JSON serialization of OrderedDict (GH-100273)

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It now preserves the order of keys.
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Serhiy Storchaka 2022-12-17 14:32:48 +02:00 • committed by GitHub
parent 2b38a9aa74
commit 0fe61d0838
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3 changed files with 15 additions and 4 deletions
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11
Lib/test/test_json/test_default.py
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@ -1,3 +1,4 @@
import collections
from test.test_json import PyTest, CTest
@ -7,6 +8,16 @@ class TestDefault:
self.dumps(type, default=repr),
self.dumps(repr(type)))
def test_ordereddict(self):
od = collections.OrderedDict(a=1, b=2, c=3, d=4)
od.move_to_end('b')
self.assertEqual(
self.dumps(od),
'{"a": 1, "c": 3, "d": 4, "b": 2}')
self.assertEqual(
self.dumps(od, sort_keys=True),
'{"a": 1, "b": 2, "c": 3, "d": 4}')
class TestPyDefault(TestDefault, PyTest): pass
class TestCDefault(TestDefault, CTest): pass