cpython/Lib/sqlite3/test/regression.py

390 lines
14 KiB
Python

#-*- coding: iso-8859-1 -*-
# pysqlite2/test/regression.py: pysqlite regression tests
#
# Copyright (C) 2006-2010 Gerhard Häring <gh@ghaering.de>
#
# This file is part of pysqlite.
#
# This software is provided 'as-is', without any express or implied
# warranty. In no event will the authors be held liable for any damages
# arising from the use of this software.
#
# Permission is granted to anyone to use this software for any purpose,
# including commercial applications, and to alter it and redistribute it
# freely, subject to the following restrictions:
#
# 1. The origin of this software must not be misrepresented; you must not
# claim that you wrote the original software. If you use this software
# in a product, an acknowledgment in the product documentation would be
# appreciated but is not required.
# 2. Altered source versions must be plainly marked as such, and must not be
# misrepresented as being the original software.
# 3. This notice may not be removed or altered from any source distribution.
import datetime
import unittest
import sqlite3 as sqlite
class RegressionTests(unittest.TestCase):
def setUp(self):
self.con = sqlite.connect(":memory:")
def tearDown(self):
self.con.close()
def CheckPragmaUserVersion(self):
# This used to crash pysqlite because this pragma command returns NULL for the column name
cur = self.con.cursor()
cur.execute("pragma user_version")
def CheckPragmaSchemaVersion(self):
# This still crashed pysqlite <= 2.2.1
con = sqlite.connect(":memory:", detect_types=sqlite.PARSE_COLNAMES)
try:
cur = self.con.cursor()
cur.execute("pragma schema_version")
finally:
cur.close()
con.close()
def CheckStatementReset(self):
# pysqlite 2.1.0 to 2.2.0 have the problem that not all statements are
# reset before a rollback, but only those that are still in the
# statement cache. The others are not accessible from the connection object.
con = sqlite.connect(":memory:", cached_statements=5)
cursors = [con.cursor() for x in range(5)]
cursors[0].execute("create table test(x)")
for i in range(10):
cursors[0].executemany("insert into test(x) values (?)", [(x,) for x in range(10)])
for i in range(5):
cursors[i].execute(" " * i + "select x from test")
con.rollback()
def CheckColumnNameWithSpaces(self):
cur = self.con.cursor()
cur.execute('select 1 as "foo bar [datetime]"')
self.assertEqual(cur.description[0][0], "foo bar")
cur.execute('select 1 as "foo baz"')
self.assertEqual(cur.description[0][0], "foo baz")
def CheckStatementFinalizationOnCloseDb(self):
# pysqlite versions <= 2.3.3 only finalized statements in the statement
# cache when closing the database. statements that were still
# referenced in cursors weren't closed and could provoke "
# "OperationalError: Unable to close due to unfinalised statements".
con = sqlite.connect(":memory:")
cursors = []
# default statement cache size is 100
for i in range(105):
cur = con.cursor()
cursors.append(cur)
cur.execute("select 1 x union select " + str(i))
con.close()
@unittest.skipIf(sqlite.sqlite_version_info < (3, 2, 2), 'needs sqlite 3.2.2 or newer')
def CheckOnConflictRollback(self):
con = sqlite.connect(":memory:")
con.execute("create table foo(x, unique(x) on conflict rollback)")
con.execute("insert into foo(x) values (1)")
try:
con.execute("insert into foo(x) values (1)")
except sqlite.DatabaseError:
pass
con.execute("insert into foo(x) values (2)")
try:
con.commit()
except sqlite.OperationalError:
self.fail("pysqlite knew nothing about the implicit ROLLBACK")
def CheckWorkaroundForBuggySqliteTransferBindings(self):
"""
pysqlite would crash with older SQLite versions unless
a workaround is implemented.
"""
self.con.execute("create table foo(bar)")
self.con.execute("drop table foo")
self.con.execute("create table foo(bar)")
def CheckEmptyStatement(self):
"""
pysqlite used to segfault with SQLite versions 3.5.x. These return NULL
for "no-operation" statements
"""
self.con.execute("")
def CheckTypeMapUsage(self):
"""
pysqlite until 2.4.1 did not rebuild the row_cast_map when recompiling
a statement. This test exhibits the problem.
"""
SELECT = "select * from foo"
con = sqlite.connect(":memory:",detect_types=sqlite.PARSE_DECLTYPES)
con.execute("create table foo(bar timestamp)")
con.execute("insert into foo(bar) values (?)", (datetime.datetime.now(),))
con.execute(SELECT)
con.execute("drop table foo")
con.execute("create table foo(bar integer)")
con.execute("insert into foo(bar) values (5)")
con.execute(SELECT)
def CheckErrorMsgDecodeError(self):
# When porting the module to Python 3.0, the error message about
# decoding errors disappeared. This verifies they're back again.
with self.assertRaises(sqlite.OperationalError) as cm:
self.con.execute("select 'xxx' || ? || 'yyy' colname",
(bytes(bytearray([250])),)).fetchone()
msg = "Could not decode to UTF-8 column 'colname' with text 'xxx"
self.assertIn(msg, str(cm.exception))
def CheckRegisterAdapter(self):
"""
See issue 3312.
"""
self.assertRaises(TypeError, sqlite.register_adapter, {}, None)
def CheckSetIsolationLevel(self):
# See issue 27881.
class CustomStr(str):
def upper(self):
return None
def __del__(self):
con.isolation_level = ""
con = sqlite.connect(":memory:")
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):
"""
Verifies that cursor methods check whether base class __init__ was
called.
"""
class Cursor(sqlite.Cursor):
def __init__(self, con):
pass
con = sqlite.connect(":memory:")
cur = Cursor(con)
with self.assertRaises(sqlite.ProgrammingError):
cur.execute("select 4+5").fetchall()
def CheckStrSubclass(self):
"""
The Python 3.0 port of the module didn't cope with values of subclasses of str.
"""
class MyStr(str): pass
self.con.execute("select ?", (MyStr("abc"),))
def CheckConnectionConstructorCallCheck(self):
"""
Verifies that connection methods check whether base class __init__ was
called.
"""
class Connection(sqlite.Connection):
def __init__(self, name):
pass
con = Connection(":memory:")
with self.assertRaises(sqlite.ProgrammingError):
cur = con.cursor()
def CheckCursorRegistration(self):
"""
Verifies that subclassed cursor classes are correctly registered with
the connection object, too. (fetch-across-rollback problem)
"""
class Connection(sqlite.Connection):
def cursor(self):
return Cursor(self)
class Cursor(sqlite.Cursor):
def __init__(self, con):
sqlite.Cursor.__init__(self, con)
con = Connection(":memory:")
cur = con.cursor()
cur.execute("create table foo(x)")
cur.executemany("insert into foo(x) values (?)", [(3,), (4,), (5,)])
cur.execute("select x from foo")
con.rollback()
with self.assertRaises(sqlite.InterfaceError):
cur.fetchall()
def CheckAutoCommit(self):
"""
Verifies that creating a connection in autocommit mode works.
2.5.3 introduced a regression so that these could no longer
be created.
"""
con = sqlite.connect(":memory:", isolation_level=None)
def CheckPragmaAutocommit(self):
"""
Verifies that running a PRAGMA statement that does an autocommit does
work. This did not work in 2.5.3/2.5.4.
"""
cur = self.con.cursor()
cur.execute("create table foo(bar)")
cur.execute("insert into foo(bar) values (5)")
cur.execute("pragma page_size")
row = cur.fetchone()
def CheckSetDict(self):
"""
See http://bugs.python.org/issue7478
It was possible to successfully register callbacks that could not be
hashed. Return codes of PyDict_SetItem were not checked properly.
"""
class NotHashable:
def __call__(self, *args, **kw):
pass
def __hash__(self):
raise TypeError()
var = NotHashable()
self.assertRaises(TypeError, self.con.create_function, var)
self.assertRaises(TypeError, self.con.create_aggregate, var)
self.assertRaises(TypeError, self.con.set_authorizer, var)
self.assertRaises(TypeError, self.con.set_progress_handler, var)
def CheckConnectionCall(self):
"""
Call a connection with a non-string SQL request: check error handling
of the statement constructor.
"""
self.assertRaises(sqlite.Warning, self.con, 1)
def CheckCollation(self):
def collation_cb(a, b):
return 1
self.assertRaises(sqlite.ProgrammingError, self.con.create_collation,
# Lone surrogate cannot be encoded to the default encoding (utf8)
"\uDC80", collation_cb)
def CheckRecursiveCursorUse(self):
"""
http://bugs.python.org/issue10811
Recursively using a cursor, such as when reusing it from a generator led to segfaults.
Now we catch recursive cursor usage and raise a ProgrammingError.
"""
con = sqlite.connect(":memory:")
cur = con.cursor()
cur.execute("create table a (bar)")
cur.execute("create table b (baz)")
def foo():
cur.execute("insert into a (bar) values (?)", (1,))
yield 1
with self.assertRaises(sqlite.ProgrammingError):
cur.executemany("insert into b (baz) values (?)",
((i,) for i in foo()))
def CheckConvertTimestampMicrosecondPadding(self):
"""
http://bugs.python.org/issue14720
The microsecond parsing of convert_timestamp() should pad with zeros,
since the microsecond string "456" actually represents "456000".
"""
con = sqlite.connect(":memory:", detect_types=sqlite.PARSE_DECLTYPES)
cur = con.cursor()
cur.execute("CREATE TABLE t (x TIMESTAMP)")
# Microseconds should be 456000
cur.execute("INSERT INTO t (x) VALUES ('2012-04-04 15:06:00.456')")
# Microseconds should be truncated to 123456
cur.execute("INSERT INTO t (x) VALUES ('2012-04-04 15:06:00.123456789')")
cur.execute("SELECT * FROM t")
values = [x[0] for x in cur.fetchall()]
self.assertEqual(values, [
datetime.datetime(2012, 4, 4, 15, 6, 0, 456000),
datetime.datetime(2012, 4, 4, 15, 6, 0, 123456),
])
def CheckInvalidIsolationLevelType(self):
# isolation level is a string, not an integer
self.assertRaises(TypeError,
sqlite.connect, ":memory:", isolation_level=123)
def CheckNullCharacter(self):
# Issue #21147
con = sqlite.connect(":memory:")
self.assertRaises(ValueError, con, "\0select 1")
self.assertRaises(ValueError, con, "select 1\0")
cur = con.cursor()
self.assertRaises(ValueError, cur.execute, " \0select 2")
self.assertRaises(ValueError, cur.execute, "select 2\0")
def CheckCommitCursorReset(self):
"""
Connection.commit() did reset cursors, which made sqlite3
to return rows multiple times when fetched from cursors
after commit. See issues 10513 and 23129 for details.
"""
con = sqlite.connect(":memory:")
con.executescript("""
create table t(c);
create table t2(c);
insert into t values(0);
insert into t values(1);
insert into t values(2);
""")
self.assertEqual(con.isolation_level, "")
counter = 0
for i, row in enumerate(con.execute("select c from t")):
with self.subTest(i=i, row=row):
con.execute("insert into t2(c) values (?)", (i,))
con.commit()
if counter == 0:
self.assertEqual(row[0], 0)
elif counter == 1:
self.assertEqual(row[0], 1)
elif counter == 2:
self.assertEqual(row[0], 2)
counter += 1
self.assertEqual(counter, 3, "should have returned exactly three rows")
def suite():
regression_suite = unittest.makeSuite(RegressionTests, "Check")
return unittest.TestSuite((regression_suite,))
def test():
runner = unittest.TextTestRunner()
runner.run(suite())
if __name__ == "__main__":
test()