lib-python.2.7.sqlite3.test.hooks.py Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jython Show documentation
Show all versions of jython Show documentation
Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
#-*- coding: ISO-8859-1 -*-
# pysqlite2/test/hooks.py: tests for various SQLite-specific hooks
#
# Copyright (C) 2006-2007 Gerhard H?ring
#
# 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 os, unittest
import sqlite3 as sqlite
class CollationTests(unittest.TestCase):
def setUp(self):
pass
def tearDown(self):
pass
def CheckCreateCollationNotCallable(self):
con = sqlite.connect(":memory:")
try:
con.create_collation("X", 42)
self.fail("should have raised a TypeError")
except TypeError, e:
self.assertEqual(e.args[0], "parameter must be callable")
def CheckCreateCollationNotAscii(self):
con = sqlite.connect(":memory:")
try:
con.create_collation("coll?", cmp)
self.fail("should have raised a ProgrammingError")
except sqlite.ProgrammingError, e:
pass
def CheckCollationIsUsed(self):
if sqlite.version_info < (3, 2, 1): # old SQLite versions crash on this test
return
def mycoll(x, y):
# reverse order
return -cmp(x, y)
con = sqlite.connect(":memory:")
con.create_collation("mycoll", mycoll)
sql = """
select x from (
select 'a' as x
union
select 'b' as x
union
select 'c' as x
) order by x collate mycoll
"""
result = con.execute(sql).fetchall()
if result[0][0] != "c" or result[1][0] != "b" or result[2][0] != "a":
self.fail("the expected order was not returned")
con.create_collation("mycoll", None)
try:
result = con.execute(sql).fetchall()
self.fail("should have raised an OperationalError")
except sqlite.OperationalError, e:
self.assertEqual(e.args[0].lower(), "no such collation sequence: mycoll")
def CheckCollationReturnsLargeInteger(self):
def mycoll(x, y):
# reverse order
return -((x > y) - (x < y)) * 2**32
con = sqlite.connect(":memory:")
con.create_collation("mycoll", mycoll)
sql = """
select x from (
select 'a' as x
union
select 'b' as x
union
select 'c' as x
) order by x collate mycoll
"""
result = con.execute(sql).fetchall()
self.assertEqual(result, [('c',), ('b',), ('a',)],
msg="the expected order was not returned")
def CheckCollationRegisterTwice(self):
"""
Register two different collation functions under the same name.
Verify that the last one is actually used.
"""
con = sqlite.connect(":memory:")
con.create_collation("mycoll", cmp)
con.create_collation("mycoll", lambda x, y: -cmp(x, y))
result = con.execute("""
select x from (select 'a' as x union select 'b' as x) order by x collate mycoll
""").fetchall()
if result[0][0] != 'b' or result[1][0] != 'a':
self.fail("wrong collation function is used")
def CheckDeregisterCollation(self):
"""
Register a collation, then deregister it. Make sure an error is raised if we try
to use it.
"""
con = sqlite.connect(":memory:")
con.create_collation("mycoll", cmp)
con.create_collation("mycoll", None)
try:
con.execute("select 'a' as x union select 'b' as x order by x collate mycoll")
self.fail("should have raised an OperationalError")
except sqlite.OperationalError, e:
if not e.args[0].startswith("no such collation sequence"):
self.fail("wrong OperationalError raised")
class ProgressTests(unittest.TestCase):
def CheckProgressHandlerUsed(self):
"""
Test that the progress handler is invoked once it is set.
"""
con = sqlite.connect(":memory:")
progress_calls = []
def progress():
progress_calls.append(None)
return 0
con.set_progress_handler(progress, 1)
con.execute("""
create table foo(a, b)
""")
self.assertTrue(progress_calls)
def CheckOpcodeCount(self):
"""
Test that the opcode argument is respected.
"""
con = sqlite.connect(":memory:")
progress_calls = []
def progress():
progress_calls.append(None)
return 0
con.set_progress_handler(progress, 1)
curs = con.cursor()
curs.execute("""
create table foo (a, b)
""")
first_count = len(progress_calls)
progress_calls = []
con.set_progress_handler(progress, 2)
curs.execute("""
create table bar (a, b)
""")
second_count = len(progress_calls)
self.assertTrue(first_count > second_count)
def CheckCancelOperation(self):
"""
Test that returning a non-zero value stops the operation in progress.
"""
con = sqlite.connect(":memory:")
progress_calls = []
def progress():
progress_calls.append(None)
return 1
con.set_progress_handler(progress, 1)
curs = con.cursor()
self.assertRaises(
sqlite.OperationalError,
curs.execute,
"create table bar (a, b)")
def CheckClearHandler(self):
"""
Test that setting the progress handler to None clears the previously set handler.
"""
con = sqlite.connect(":memory:")
action = []
def progress():
action.append(1)
return 0
con.set_progress_handler(progress, 1)
con.set_progress_handler(None, 1)
con.execute("select 1 union select 2 union select 3").fetchall()
self.assertEqual(len(action), 0, "progress handler was not cleared")
def suite():
collation_suite = unittest.makeSuite(CollationTests, "Check")
progress_suite = unittest.makeSuite(ProgressTests, "Check")
return unittest.TestSuite((collation_suite, progress_suite))
def test():
runner = unittest.TextTestRunner()
runner.run(suite())
if __name__ == "__main__":
test()