[3.7] bpo-33383: Fix crash in get() of the dbm.ndbm database object. (GH-6630) (GH-6631)

(cherry picked from commit 2e38cc39330bd7f3003652869b644110a97a78d8)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/Lib/test/test_dbm.py b/Lib/test/test_dbm.py
index f0a428d..fb89807 100644
--- a/Lib/test/test_dbm.py
+++ b/Lib/test/test_dbm.py
@@ -86,12 +86,21 @@ class AnyDBMTestCase:
         f = dbm.open(_fname, 'c')
         self._dict['g'] = f[b'g'] = b"indented"
         self.read_helper(f)
+        # setdefault() works as in the dict interface
+        self.assertEqual(f.setdefault(b'xxx', b'foo'), b'foo')
+        self.assertEqual(f[b'xxx'], b'foo')
         f.close()
 
     def test_anydbm_read(self):
         self.init_db()
         f = dbm.open(_fname, 'r')
         self.read_helper(f)
+        # get() works as in the dict interface
+        self.assertEqual(f.get(b'a'), self._dict['a'])
+        self.assertEqual(f.get(b'xxx', b'foo'), b'foo')
+        self.assertIsNone(f.get(b'xxx'))
+        with self.assertRaises(KeyError):
+            f[b'xxx']
         f.close()
 
     def test_anydbm_keys(self):