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Issue #27881: Fixed possible bugs when setting sqlite3.Connection.isolation_level.

Browse source 
Based on patch by Xiang Zhang.
This commit is contained in:
Serhiy Storchaka 2016-09-01 22:18:03 +03:00
parent 00b1e0f7ea
commit 2891492d23
4 changed files with 64 additions and 45 deletions
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31
Lib/sqlite3/test/regression.py
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@ -146,11 +146,34 @@ class RegressionTests(unittest.TestCase):
self.assertRaises(TypeError, sqlite.register_adapter, {}, None)
def CheckSetIsolationLevel(self):
"""
See issue 3312.
"""
# See issue 27881.
class CustomStr(str):
def upper(self):
return None
def __del__(self):
con.isolation_level = ""
con = sqlite.connect(":memory:")
setattr(con, "isolation_level", "\xe9")
con.isolation_level = None
for level in "", "DEFERRED", "IMMEDIATE", "EXCLUSIVE":
with self.subTest(level=level):
con.isolation_level = level
con.isolation_level = level.lower()
con.isolation_level = level.capitalize()
con.isolation_level = CustomStr(level)
# setting isolation_level failure should not alter previous state
con.isolation_level = None
con.isolation_level = "DEFERRED"
pairs = [
(1, TypeError), (b'', TypeError), ("abc", ValueError),
("IMMEDIATE\0EXCLUSIVE", ValueError), ("\xe9", ValueError),
]
for value, exc in pairs:
with self.subTest(level=value):
with self.assertRaises(exc):
con.isolation_level = value
self.assertEqual(con.isolation_level, "DEFERRED")
def CheckCursorConstructorCallCheck(self):
"""