mirror of https://github.com/python/cpython
471 lines
17 KiB
Python
471 lines
17 KiB
Python
# pysqlite2/test/regression.py: pysqlite regression tests
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#
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# Copyright (C) 2006-2010 Gerhard Häring <gh@ghaering.de>
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#
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# This file is part of pysqlite.
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#
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# This software is provided 'as-is', without any express or implied
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# warranty. In no event will the authors be held liable for any damages
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# arising from the use of this software.
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#
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# Permission is granted to anyone to use this software for any purpose,
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# including commercial applications, and to alter it and redistribute it
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# freely, subject to the following restrictions:
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#
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# 1. The origin of this software must not be misrepresented; you must not
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# claim that you wrote the original software. If you use this software
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# in a product, an acknowledgment in the product documentation would be
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# appreciated but is not required.
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# 2. Altered source versions must be plainly marked as such, and must not be
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# misrepresented as being the original software.
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# 3. This notice may not be removed or altered from any source distribution.
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import datetime
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import unittest
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import sqlite3 as sqlite
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import weakref
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import functools
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from test import support
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from test.test_sqlite3.test_dbapi import memory_database, managed_connect, cx_limit
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class RegressionTests(unittest.TestCase):
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def setUp(self):
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self.con = sqlite.connect(":memory:")
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def tearDown(self):
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self.con.close()
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def test_pragma_user_version(self):
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# This used to crash pysqlite because this pragma command returns NULL for the column name
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cur = self.con.cursor()
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cur.execute("pragma user_version")
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def test_pragma_schema_version(self):
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# This still crashed pysqlite <= 2.2.1
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con = sqlite.connect(":memory:", detect_types=sqlite.PARSE_COLNAMES)
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try:
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cur = self.con.cursor()
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cur.execute("pragma schema_version")
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finally:
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cur.close()
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con.close()
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def test_statement_reset(self):
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# pysqlite 2.1.0 to 2.2.0 have the problem that not all statements are
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# reset before a rollback, but only those that are still in the
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# statement cache. The others are not accessible from the connection object.
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con = sqlite.connect(":memory:", cached_statements=5)
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cursors = [con.cursor() for x in range(5)]
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cursors[0].execute("create table test(x)")
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for i in range(10):
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cursors[0].executemany("insert into test(x) values (?)", [(x,) for x in range(10)])
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for i in range(5):
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cursors[i].execute(" " * i + "select x from test")
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con.rollback()
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def test_column_name_with_spaces(self):
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cur = self.con.cursor()
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cur.execute('select 1 as "foo bar [datetime]"')
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self.assertEqual(cur.description[0][0], "foo bar [datetime]")
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cur.execute('select 1 as "foo baz"')
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self.assertEqual(cur.description[0][0], "foo baz")
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def test_statement_finalization_on_close_db(self):
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# pysqlite versions <= 2.3.3 only finalized statements in the statement
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# cache when closing the database. statements that were still
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# referenced in cursors weren't closed and could provoke "
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# "OperationalError: Unable to close due to unfinalised statements".
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con = sqlite.connect(":memory:")
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cursors = []
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# default statement cache size is 100
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for i in range(105):
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cur = con.cursor()
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cursors.append(cur)
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cur.execute("select 1 x union select " + str(i))
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con.close()
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def test_on_conflict_rollback(self):
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con = sqlite.connect(":memory:")
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con.execute("create table foo(x, unique(x) on conflict rollback)")
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con.execute("insert into foo(x) values (1)")
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try:
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con.execute("insert into foo(x) values (1)")
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except sqlite.DatabaseError:
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pass
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con.execute("insert into foo(x) values (2)")
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try:
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con.commit()
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except sqlite.OperationalError:
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self.fail("pysqlite knew nothing about the implicit ROLLBACK")
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def test_workaround_for_buggy_sqlite_transfer_bindings(self):
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"""
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pysqlite would crash with older SQLite versions unless
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a workaround is implemented.
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"""
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self.con.execute("create table foo(bar)")
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self.con.execute("drop table foo")
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self.con.execute("create table foo(bar)")
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def test_empty_statement(self):
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"""
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pysqlite used to segfault with SQLite versions 3.5.x. These return NULL
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for "no-operation" statements
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"""
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self.con.execute("")
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def test_type_map_usage(self):
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"""
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pysqlite until 2.4.1 did not rebuild the row_cast_map when recompiling
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a statement. This test exhibits the problem.
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"""
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SELECT = "select * from foo"
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con = sqlite.connect(":memory:",detect_types=sqlite.PARSE_DECLTYPES)
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cur = con.cursor()
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cur.execute("create table foo(bar timestamp)")
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cur.execute("insert into foo(bar) values (?)", (datetime.datetime.now(),))
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cur.execute(SELECT)
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cur.execute("drop table foo")
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cur.execute("create table foo(bar integer)")
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cur.execute("insert into foo(bar) values (5)")
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cur.execute(SELECT)
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def test_bind_mutating_list(self):
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# Issue41662: Crash when mutate a list of parameters during iteration.
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class X:
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def __conform__(self, protocol):
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parameters.clear()
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return "..."
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parameters = [X(), 0]
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con = sqlite.connect(":memory:",detect_types=sqlite.PARSE_DECLTYPES)
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con.execute("create table foo(bar X, baz integer)")
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# Should not crash
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with self.assertRaises(IndexError):
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con.execute("insert into foo(bar, baz) values (?, ?)", parameters)
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def test_error_msg_decode_error(self):
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# When porting the module to Python 3.0, the error message about
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# decoding errors disappeared. This verifies they're back again.
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with self.assertRaises(sqlite.OperationalError) as cm:
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self.con.execute("select 'xxx' || ? || 'yyy' colname",
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(bytes(bytearray([250])),)).fetchone()
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msg = "Could not decode to UTF-8 column 'colname' with text 'xxx"
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self.assertIn(msg, str(cm.exception))
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def test_register_adapter(self):
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"""
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See issue 3312.
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"""
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self.assertRaises(TypeError, sqlite.register_adapter, {}, None)
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def test_set_isolation_level(self):
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# See issue 27881.
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class CustomStr(str):
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def upper(self):
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return None
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def __del__(self):
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con.isolation_level = ""
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con = sqlite.connect(":memory:")
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con.isolation_level = None
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for level in "", "DEFERRED", "IMMEDIATE", "EXCLUSIVE":
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with self.subTest(level=level):
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con.isolation_level = level
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con.isolation_level = level.lower()
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con.isolation_level = level.capitalize()
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con.isolation_level = CustomStr(level)
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# setting isolation_level failure should not alter previous state
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con.isolation_level = None
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con.isolation_level = "DEFERRED"
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pairs = [
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(1, TypeError), (b'', TypeError), ("abc", ValueError),
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("IMMEDIATE\0EXCLUSIVE", ValueError), ("\xe9", ValueError),
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]
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for value, exc in pairs:
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with self.subTest(level=value):
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with self.assertRaises(exc):
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con.isolation_level = value
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self.assertEqual(con.isolation_level, "DEFERRED")
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def test_cursor_constructor_call_check(self):
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"""
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Verifies that cursor methods check whether base class __init__ was
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called.
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"""
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class Cursor(sqlite.Cursor):
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def __init__(self, con):
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pass
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con = sqlite.connect(":memory:")
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cur = Cursor(con)
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with self.assertRaises(sqlite.ProgrammingError):
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cur.execute("select 4+5").fetchall()
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with self.assertRaisesRegex(sqlite.ProgrammingError,
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r'^Base Cursor\.__init__ not called\.$'):
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cur.close()
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def test_str_subclass(self):
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"""
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The Python 3.0 port of the module didn't cope with values of subclasses of str.
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"""
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class MyStr(str): pass
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self.con.execute("select ?", (MyStr("abc"),))
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def test_connection_constructor_call_check(self):
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"""
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Verifies that connection methods check whether base class __init__ was
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called.
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"""
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class Connection(sqlite.Connection):
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def __init__(self, name):
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pass
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con = Connection(":memory:")
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with self.assertRaises(sqlite.ProgrammingError):
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cur = con.cursor()
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def test_auto_commit(self):
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"""
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Verifies that creating a connection in autocommit mode works.
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2.5.3 introduced a regression so that these could no longer
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be created.
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"""
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con = sqlite.connect(":memory:", isolation_level=None)
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def test_pragma_autocommit(self):
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"""
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Verifies that running a PRAGMA statement that does an autocommit does
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work. This did not work in 2.5.3/2.5.4.
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"""
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cur = self.con.cursor()
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cur.execute("create table foo(bar)")
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cur.execute("insert into foo(bar) values (5)")
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cur.execute("pragma page_size")
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row = cur.fetchone()
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def test_connection_call(self):
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"""
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Call a connection with a non-string SQL request: check error handling
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of the statement constructor.
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"""
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self.assertRaises(TypeError, self.con, b"select 1")
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def test_collation(self):
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def collation_cb(a, b):
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return 1
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self.assertRaises(UnicodeEncodeError, self.con.create_collation,
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# Lone surrogate cannot be encoded to the default encoding (utf8)
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"\uDC80", collation_cb)
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def test_recursive_cursor_use(self):
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"""
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http://bugs.python.org/issue10811
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Recursively using a cursor, such as when reusing it from a generator led to segfaults.
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Now we catch recursive cursor usage and raise a ProgrammingError.
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"""
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con = sqlite.connect(":memory:")
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cur = con.cursor()
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cur.execute("create table a (bar)")
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cur.execute("create table b (baz)")
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def foo():
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cur.execute("insert into a (bar) values (?)", (1,))
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yield 1
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with self.assertRaises(sqlite.ProgrammingError):
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cur.executemany("insert into b (baz) values (?)",
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((i,) for i in foo()))
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def test_convert_timestamp_microsecond_padding(self):
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"""
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http://bugs.python.org/issue14720
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The microsecond parsing of convert_timestamp() should pad with zeros,
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since the microsecond string "456" actually represents "456000".
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"""
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con = sqlite.connect(":memory:", detect_types=sqlite.PARSE_DECLTYPES)
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cur = con.cursor()
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cur.execute("CREATE TABLE t (x TIMESTAMP)")
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# Microseconds should be 456000
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cur.execute("INSERT INTO t (x) VALUES ('2012-04-04 15:06:00.456')")
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# Microseconds should be truncated to 123456
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cur.execute("INSERT INTO t (x) VALUES ('2012-04-04 15:06:00.123456789')")
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cur.execute("SELECT * FROM t")
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values = [x[0] for x in cur.fetchall()]
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self.assertEqual(values, [
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datetime.datetime(2012, 4, 4, 15, 6, 0, 456000),
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datetime.datetime(2012, 4, 4, 15, 6, 0, 123456),
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])
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def test_invalid_isolation_level_type(self):
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# isolation level is a string, not an integer
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self.assertRaises(TypeError,
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sqlite.connect, ":memory:", isolation_level=123)
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def test_null_character(self):
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# Issue #21147
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con = sqlite.connect(":memory:")
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self.assertRaises(ValueError, con, "\0select 1")
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self.assertRaises(ValueError, con, "select 1\0")
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cur = con.cursor()
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self.assertRaises(ValueError, cur.execute, " \0select 2")
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self.assertRaises(ValueError, cur.execute, "select 2\0")
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def test_surrogates(self):
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con = sqlite.connect(":memory:")
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self.assertRaises(UnicodeEncodeError, con, "select '\ud8ff'")
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self.assertRaises(UnicodeEncodeError, con, "select '\udcff'")
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cur = con.cursor()
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self.assertRaises(UnicodeEncodeError, cur.execute, "select '\ud8ff'")
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self.assertRaises(UnicodeEncodeError, cur.execute, "select '\udcff'")
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def test_large_sql(self):
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msg = "query string is too large"
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with memory_database() as cx, cx_limit(cx) as lim:
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cu = cx.cursor()
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cx("select 1".ljust(lim))
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# use a different SQL statement; don't reuse from the LRU cache
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cu.execute("select 2".ljust(lim))
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sql = "select 3".ljust(lim+1)
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self.assertRaisesRegex(sqlite.DataError, msg, cx, sql)
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self.assertRaisesRegex(sqlite.DataError, msg, cu.execute, sql)
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def test_commit_cursor_reset(self):
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"""
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Connection.commit() did reset cursors, which made sqlite3
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to return rows multiple times when fetched from cursors
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after commit. See issues 10513 and 23129 for details.
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"""
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con = sqlite.connect(":memory:")
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con.executescript("""
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create table t(c);
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create table t2(c);
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insert into t values(0);
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insert into t values(1);
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insert into t values(2);
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""")
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self.assertEqual(con.isolation_level, "")
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counter = 0
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for i, row in enumerate(con.execute("select c from t")):
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with self.subTest(i=i, row=row):
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con.execute("insert into t2(c) values (?)", (i,))
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con.commit()
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if counter == 0:
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self.assertEqual(row[0], 0)
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elif counter == 1:
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self.assertEqual(row[0], 1)
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elif counter == 2:
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self.assertEqual(row[0], 2)
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counter += 1
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self.assertEqual(counter, 3, "should have returned exactly three rows")
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def test_bpo31770(self):
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"""
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The interpreter shouldn't crash in case Cursor.__init__() is called
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more than once.
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"""
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def callback(*args):
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pass
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con = sqlite.connect(":memory:")
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cur = sqlite.Cursor(con)
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ref = weakref.ref(cur, callback)
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cur.__init__(con)
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del cur
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# The interpreter shouldn't crash when ref is collected.
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del ref
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support.gc_collect()
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def test_del_isolation_level_segfault(self):
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with self.assertRaises(AttributeError):
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del self.con.isolation_level
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def test_bpo37347(self):
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class Printer:
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def log(self, *args):
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return sqlite.SQLITE_OK
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for method in [self.con.set_trace_callback,
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functools.partial(self.con.set_progress_handler, n=1),
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self.con.set_authorizer]:
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printer_instance = Printer()
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method(printer_instance.log)
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method(printer_instance.log)
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self.con.execute("select 1") # trigger seg fault
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method(None)
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def test_return_empty_bytestring(self):
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cur = self.con.execute("select X''")
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val = cur.fetchone()[0]
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self.assertEqual(val, b'')
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def test_table_lock_cursor_replace_stmt(self):
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with managed_connect(":memory:", in_mem=True) as con:
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cur = con.cursor()
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cur.execute("create table t(t)")
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cur.executemany("insert into t values(?)",
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((v,) for v in range(5)))
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con.commit()
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cur.execute("select t from t")
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cur.execute("drop table t")
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con.commit()
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def test_table_lock_cursor_dealloc(self):
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with managed_connect(":memory:", in_mem=True) as con:
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con.execute("create table t(t)")
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con.executemany("insert into t values(?)",
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((v,) for v in range(5)))
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con.commit()
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cur = con.execute("select t from t")
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del cur
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con.execute("drop table t")
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con.commit()
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def test_table_lock_cursor_non_readonly_select(self):
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with managed_connect(":memory:", in_mem=True) as con:
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con.execute("create table t(t)")
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con.executemany("insert into t values(?)",
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((v,) for v in range(5)))
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con.commit()
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def dup(v):
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con.execute("insert into t values(?)", (v,))
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return
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con.create_function("dup", 1, dup)
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cur = con.execute("select dup(t) from t")
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del cur
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con.execute("drop table t")
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con.commit()
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def test_executescript_step_through_select(self):
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with managed_connect(":memory:", in_mem=True) as con:
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values = [(v,) for v in range(5)]
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with con:
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con.execute("create table t(t)")
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con.executemany("insert into t values(?)", values)
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steps = []
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con.create_function("step", 1, lambda x: steps.append((x,)))
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con.executescript("select step(t) from t")
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self.assertEqual(steps, values)
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if __name__ == "__main__":
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unittest.main()
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