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#-*- coding: iso-8859-1 -*-
# pysqlite2/test/hooks.py: tests for various SQLite-specific hooks
#
# Copyright (C) 2006-2007 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 unittest
import sqlite3 as sqlite
class CollationTests(unittest.TestCase):
def CheckCreateCollationNotCallable(self):
con = sqlite.connect(":memory:")
with self.assertRaises(TypeError) as cm:
con.create_collation("X", 42)
self.assertEqual(str(cm.exception), 'parameter must be callable')
def CheckCreateCollationNotAscii(self):
con = sqlite.connect(":memory:")
with self.assertRaises(sqlite.ProgrammingError):
con.create_collation("collä", lambda x, y: (x > y) - (x < y))
@unittest.skipIf(sqlite.sqlite_version_info < (3, 2, 1),
'old SQLite versions crash on this test')
def CheckCollationIsUsed(self):
def mycoll(x, y):
# reverse order
return -((x > y) - (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()
self.assertEqual(result, [('c',), ('b',), ('a',)],
msg='the expected order was not returned')
con.create_collation("mycoll", None)
with self.assertRaises(sqlite.OperationalError) as cm:
result = con.execute(sql).fetchall()
self.assertEqual(str(cm.exception), '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", lambda x, y: (x > y) - (x < y))
con.create_collation("mycoll", lambda x, y: -((x > y) - (x < y)))
result = con.execute("""
select x from (select 'a' as x union select 'b' as x) order by x collate mycoll
""").fetchall()
self.assertEqual(result[0][0], 'b')
self.assertEqual(result[1][0], 'a')
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", lambda x, y: (x > y) - (x < y))
con.create_collation("mycoll", None)
with self.assertRaises(sqlite.OperationalError) as cm:
con.execute("select 'a' as x union select 'b' as x order by x collate mycoll")
self.assertEqual(str(cm.exception), 'no such collation sequence: mycoll')
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.assertGreaterEqual(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 = 0
def progress():
nonlocal action
action = 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(action, 0, "progress handler was not cleared")
class TraceCallbackTests(unittest.TestCase):
def CheckTraceCallbackUsed(self):
"""
Test that the trace callback is invoked once it is set.
"""
con = sqlite.connect(":memory:")
traced_statements = []
def trace(statement):
traced_statements.append(statement)
con.set_trace_callback(trace)
con.execute("create table foo(a, b)")
self.assertTrue(traced_statements)
self.assertTrue(any("create table foo" in stmt for stmt in traced_statements))
def CheckClearTraceCallback(self):
"""
Test that setting the trace callback to None clears the previously set callback.
"""
con = sqlite.connect(":memory:")
traced_statements = []
def trace(statement):
traced_statements.append(statement)
con.set_trace_callback(trace)
con.set_trace_callback(None)
con.execute("create table foo(a, b)")
self.assertFalse(traced_statements, "trace callback was not cleared")
def CheckUnicodeContent(self):
"""
Test that the statement can contain unicode literals.
"""
unicode_value = '\xf6\xe4\xfc\xd6\xc4\xdc\xdf\u20ac'
con = sqlite.connect(":memory:")
traced_statements = []
def trace(statement):
traced_statements.append(statement)
con.set_trace_callback(trace)
con.execute("create table foo(x)")
# Can't execute bound parameters as their values don't appear
# in traced statements before SQLite 3.6.21
# (cf. http://www.sqlite.org/draft/releaselog/3_6_21.html)
con.execute('insert into foo(x) values ("%s")' % unicode_value)
con.commit()
self.assertTrue(any(unicode_value in stmt for stmt in traced_statements),
"Unicode data %s garbled in trace callback: %s"
% (ascii(unicode_value), ', '.join(map(ascii, traced_statements))))
def suite():
collation_suite = unittest.makeSuite(CollationTests, "Check")
progress_suite = unittest.makeSuite(ProgressTests, "Check")
trace_suite = unittest.makeSuite(TraceCallbackTests, "Check")
return unittest.TestSuite((collation_suite, progress_suite, trace_suite))
def test():
runner = unittest.TextTestRunner()
runner.run(suite())
if __name__ == "__main__":
test()
|
