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| author | Dennis Sweeney <36520290+sweeneyde@users.noreply.github.com> | 2020-06-12 17:19:25 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-06-12 17:19:25 (GMT) |
| commit | 3ee0e48b0376a710c08eec6f30e4181563b192a2 (patch) | |
| tree | 8a0ea5514e2b1bfb3617f434271c85465d805463 /Lib/test/test_dict.py | |
| parent | 0d3350daa8123a3e16d4a534b6e873eb12c10d7c (diff) | |
| download | cpython-3ee0e48b0376a710c08eec6f30e4181563b192a2.zip cpython-3ee0e48b0376a710c08eec6f30e4181563b192a2.tar.gz cpython-3ee0e48b0376a710c08eec6f30e4181563b192a2.tar.bz2 | |
bpo-40890: Add `mapping` property to dict views (GH-20749)
Diffstat (limited to 'Lib/test/test_dict.py')
| -rw-r--r-- | Lib/test/test_dict.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Lib/test/test_dict.py b/Lib/test/test_dict.py index 5c08810..9ff8b7d 100644 --- a/Lib/test/test_dict.py +++ b/Lib/test/test_dict.py @@ -105,6 +105,26 @@ class DictTest(unittest.TestCase): self.assertRaises(TypeError, d.items, None) self.assertEqual(repr(dict(a=1).items()), "dict_items([('a', 1)])") + def test_views_mapping(self): + mappingproxy = type(type.__dict__) + class Dict(dict): + pass + for cls in [dict, Dict]: + d = cls() + m1 = d.keys().mapping + m2 = d.values().mapping + m3 = d.items().mapping + + for m in [m1, m2, m3]: + self.assertIsInstance(m, mappingproxy) + self.assertEqual(m, d) + + d["foo"] = "bar" + + for m in [m1, m2, m3]: + self.assertIsInstance(m, mappingproxy) + self.assertEqual(m, d) + def test_contains(self): d = {} self.assertNotIn('a', d) |