/Lib/sqlite3/test/regression.py

  1#-*- coding: ISO-8859-1 -*-
  2# pysqlite2/test/regression.py: pysqlite regression tests
  3#
  4# Copyright (C) 2006-2007 Gerhard Häring <gh@ghaering.de>
  5#
  6# This file is part of pysqlite.
  7#
  8# This software is provided 'as-is', without any express or implied
  9# warranty.  In no event will the authors be held liable for any damages
 10# arising from the use of this software.
 11#
 12# Permission is granted to anyone to use this software for any purpose,
 13# including commercial applications, and to alter it and redistribute it
 14# freely, subject to the following restrictions:
 15#
 16# 1. The origin of this software must not be misrepresented; you must not
 17#    claim that you wrote the original software. If you use this software
 18#    in a product, an acknowledgment in the product documentation would be
 19#    appreciated but is not required.
 20# 2. Altered source versions must be plainly marked as such, and must not be
 21#    misrepresented as being the original software.
 22# 3. This notice may not be removed or altered from any source distribution.
 23
 24import datetime
 25import unittest
 26import sqlite3 as sqlite
 27
 28class RegressionTests(unittest.TestCase):
 29    def setUp(self):
 30        self.con = sqlite.connect(":memory:")
 31
 32    def tearDown(self):
 33        self.con.close()
 34
 35    def CheckPragmaUserVersion(self):
 36        # This used to crash pysqlite because this pragma command returns NULL for the column name
 37        cur = self.con.cursor()
 38        cur.execute("pragma user_version")
 39
 40    def CheckPragmaSchemaVersion(self):
 41        # This still crashed pysqlite <= 2.2.1
 42        con = sqlite.connect(":memory:", detect_types=sqlite.PARSE_COLNAMES)
 43        try:
 44            cur = self.con.cursor()
 45            cur.execute("pragma schema_version")
 46        finally:
 47            cur.close()
 48            con.close()
 49
 50    def CheckStatementReset(self):
 51        # pysqlite 2.1.0 to 2.2.0 have the problem that not all statements are
 52        # reset before a rollback, but only those that are still in the
 53        # statement cache. The others are not accessible from the connection object.
 54        con = sqlite.connect(":memory:", cached_statements=5)
 55        cursors = [con.cursor() for x in xrange(5)]
 56        cursors[0].execute("create table test(x)")
 57        for i in range(10):
 58            cursors[0].executemany("insert into test(x) values (?)", [(x,) for x in xrange(10)])
 59
 60        for i in range(5):
 61            cursors[i].execute(" " * i + "select x from test")
 62
 63        con.rollback()
 64
 65    def CheckColumnNameWithSpaces(self):
 66        cur = self.con.cursor()
 67        cur.execute('select 1 as "foo bar [datetime]"')
 68        self.failUnlessEqual(cur.description[0][0], "foo bar")
 69
 70        cur.execute('select 1 as "foo baz"')
 71        self.failUnlessEqual(cur.description[0][0], "foo baz")
 72
 73    def CheckStatementAvailable(self):
 74        # pysqlite up to 2.3.2 crashed on this, because the active statement handle was not checked
 75        # before trying to fetch data from it. close() destroys the active statement ...
 76        con = sqlite.connect(":memory:", detect_types=sqlite.PARSE_DECLTYPES)
 77        cur = con.cursor()
 78        cur.execute("select 4 union select 5")
 79        cur.close()
 80        cur.fetchone()
 81        cur.fetchone()
 82
 83    def CheckStatementFinalizationOnCloseDb(self):
 84        # pysqlite versions <= 2.3.3 only finalized statements in the statement
 85        # cache when closing the database. statements that were still
 86        # referenced in cursors weren't closed an could provoke "
 87        # "OperationalError: Unable to close due to unfinalised statements".
 88        con = sqlite.connect(":memory:")
 89        cursors = []
 90        # default statement cache size is 100
 91        for i in range(105):
 92            cur = con.cursor()
 93            cursors.append(cur)
 94            cur.execute("select 1 x union select " + str(i))
 95        con.close()
 96
 97    def CheckOnConflictRollback(self):
 98        if sqlite.sqlite_version_info < (3, 2, 2):
 99            return
100        con = sqlite.connect(":memory:")
101        con.execute("create table foo(x, unique(x) on conflict rollback)")
102        con.execute("insert into foo(x) values (1)")
103        try:
104            con.execute("insert into foo(x) values (1)")
105        except sqlite.DatabaseError:
106            pass
107        con.execute("insert into foo(x) values (2)")
108        try:
109            con.commit()
110        except sqlite.OperationalError:
111            self.fail("pysqlite knew nothing about the implicit ROLLBACK")
112
113    def CheckWorkaroundForBuggySqliteTransferBindings(self):
114        """
115        pysqlite would crash with older SQLite versions unless
116        a workaround is implemented.
117        """
118        self.con.execute("create table foo(bar)")
119        self.con.execute("drop table foo")
120        self.con.execute("create table foo(bar)")
121
122    def CheckEmptyStatement(self):
123        """
124        pysqlite used to segfault with SQLite versions 3.5.x. These return NULL
125        for "no-operation" statements
126        """
127        self.con.execute("")
128
129    def CheckUnicodeConnect(self):
130        """
131        With pysqlite 2.4.0 you needed to use a string or a APSW connection
132        object for opening database connections.
133
134        Formerly, both bytestrings and unicode strings used to work.
135
136        Let's make sure unicode strings work in the future.
137        """
138        con = sqlite.connect(u":memory:")
139        con.close()
140
141    def CheckTypeMapUsage(self):
142        """
143        pysqlite until 2.4.1 did not rebuild the row_cast_map when recompiling
144        a statement. This test exhibits the problem.
145        """
146        SELECT = "select * from foo"
147        con = sqlite.connect(":memory:",detect_types=sqlite.PARSE_DECLTYPES)
148        con.execute("create table foo(bar timestamp)")
149        con.execute("insert into foo(bar) values (?)", (datetime.datetime.now(),))
150        con.execute(SELECT)
151        con.execute("drop table foo")
152        con.execute("create table foo(bar integer)")
153        con.execute("insert into foo(bar) values (5)")
154        con.execute(SELECT)
155
156    def CheckRegisterAdapter(self):
157        """
158        See issue 3312.
159        """
160        self.assertRaises(TypeError, sqlite.register_adapter, {}, None)
161
162    def CheckSetIsolationLevel(self):
163        """
164        See issue 3312.
165        """
166        con = sqlite.connect(":memory:")
167        self.assertRaises(UnicodeEncodeError, setattr, con,
168                          "isolation_level", u"\xe9")
169
170
171def suite():
172    regression_suite = unittest.makeSuite(RegressionTests, "Check")
173    return unittest.TestSuite((regression_suite,))
174
175def test():
176    runner = unittest.TextTestRunner()
177    runner.run(suite())
178
179if __name__ == "__main__":
180    test()