mirror of https://github.com/python/cpython
Fix bug 1725856.
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parent
daa6f254c6
commit
1042a4d719
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@ -274,12 +274,16 @@ class _DBWithCursor(_iter_mixin):
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def first(self):
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def first(self):
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self._checkOpen()
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self._checkOpen()
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# fix 1725856: don't needlessly try to restore our cursor position
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self.saved_dbc_key = None
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self._checkCursor()
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self._checkCursor()
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rv = _DeadlockWrap(self.dbc.first)
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rv = _DeadlockWrap(self.dbc.first)
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return rv
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return rv
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def last(self):
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def last(self):
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self._checkOpen()
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self._checkOpen()
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# fix 1725856: don't needlessly try to restore our cursor position
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self.saved_dbc_key = None
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self._checkCursor()
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self._checkCursor()
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rv = _DeadlockWrap(self.dbc.last)
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rv = _DeadlockWrap(self.dbc.last)
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return rv
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return rv
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@ -127,6 +127,22 @@ class TestBSDDB(unittest.TestCase):
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items.append(self.f.previous())
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items.append(self.f.previous())
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self.assertSetEquals(items, self.d.items())
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self.assertSetEquals(items, self.d.items())
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def test_first_while_deleting(self):
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# Test for bug 1725856
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self.assert_(len(self.d) >= 2, "test requires >=2 items")
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for _ in self.d:
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key = self.f.first()[0]
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del self.f[key]
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self.assertEqual([], self.f.items(), "expected empty db after test")
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def test_last_while_deleting(self):
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# Test for bug 1725856's evil twin
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self.assert_(len(self.d) >= 2, "test requires >=2 items")
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for _ in self.d:
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key = self.f.last()[0]
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del self.f[key]
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self.assertEqual([], self.f.items(), "expected empty db after test")
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def test_set_location(self):
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def test_set_location(self):
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self.assertEqual(self.f.set_location('e'), ('e', self.d['e']))
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self.assertEqual(self.f.set_location('e'), ('e', self.d['e']))
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