#!/usr/bin/env python # test_quote.py - unit test for strings quoting # # Copyright (C) 2007-2011 Daniele Varrazzo # # psycopg2 is free software: you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as published # by the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # In addition, as a special exception, the copyright holders give # permission to link this program with the OpenSSL library (or with # modified versions of OpenSSL that use the same license as OpenSSL), # and distribute linked combinations including the two. # # You must obey the GNU Lesser General Public License in all respects for # all of the code used other than OpenSSL. # # psycopg2 is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or # FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public # License for more details. import sys import testutils from testutils import unittest, ConnectingTestCase import psycopg2 import psycopg2.extensions from psycopg2.extensions import b class QuotingTestCase(ConnectingTestCase): r"""Checks the correct quoting of strings and binary objects. Since ver. 8.1, PostgreSQL is moving towards SQL standard conforming strings, where the backslash (\) is treated as literal character, not as escape. To treat the backslash as a C-style escapes, PG supports the E'' quotes. This test case checks that the E'' quotes are used whenever they are needed. The tests are expected to pass with all PostgreSQL server versions (currently tested with 7.4 <= PG <= 8.3beta) and with any 'standard_conforming_strings' server parameter value. The tests also check that no warning is raised ('escape_string_warning' should be on). http://www.postgresql.org/docs/current/static/sql-syntax-lexical.html#SQL-SYNTAX-STRINGS http://www.postgresql.org/docs/current/static/runtime-config-compatible.html """ def test_string(self): data = """some data with \t chars to escape into, 'quotes' and \\ a backslash too. """ data += "".join(map(chr, range(1, 127))) curs = self.conn.cursor() curs.execute("SELECT %s;", (data,)) res = curs.fetchone()[0] self.assertEqual(res, data) self.assert_(not self.conn.notices) def test_string_null_terminator(self): curs = self.conn.cursor() data = 'abcd\x01\x00cdefg' with self.assertRaises(ValueError) as e: curs.execute("SELECT %s", (data,)) self.assertEquals(e.exception.message, 'A string literal cannot contain NUL (0x00) characters.') def test_binary(self): data = b("""some data with \000\013 binary stuff into, 'quotes' and \\ a backslash too. """) if sys.version_info[0] < 3: data += "".join(map(chr, range(256))) else: data += bytes(range(256)) curs = self.conn.cursor() curs.execute("SELECT %s::bytea;", (psycopg2.Binary(data),)) if sys.version_info[0] < 3: res = str(curs.fetchone()[0]) else: res = curs.fetchone()[0].tobytes() if res[0] in (b('x'), ord(b('x'))) and self.conn.server_version >= 90000: return self.skipTest( "bytea broken with server >= 9.0, libpq < 9") self.assertEqual(res, data) self.assert_(not self.conn.notices) def test_unicode(self): curs = self.conn.cursor() curs.execute("SHOW server_encoding") server_encoding = curs.fetchone()[0] if server_encoding != "UTF8": return self.skipTest( "Unicode test skipped since server encoding is %s" % server_encoding) data = u"""some data with \t chars to escape into, 'quotes', \u20ac euro sign and \\ a backslash too. """ data += u"".join(map(unichr, [u for u in range(1, 65536) if not 0xD800 <= u <= 0xDFFF])) # surrogate area self.conn.set_client_encoding('UNICODE') psycopg2.extensions.register_type(psycopg2.extensions.UNICODE, self.conn) curs.execute("SELECT %s::text;", (data,)) res = curs.fetchone()[0] self.assertEqual(res, data) self.assert_(not self.conn.notices) def test_latin1(self): self.conn.set_client_encoding('LATIN1') curs = self.conn.cursor() if sys.version_info[0] < 3: data = ''.join(map(chr, range(32, 127) + range(160, 256))) else: data = bytes(range(32, 127) + range(160, 256)).decode('latin1') # as string curs.execute("SELECT %s::text;", (data,)) res = curs.fetchone()[0] self.assertEqual(res, data) self.assert_(not self.conn.notices) # as unicode if sys.version_info[0] < 3: psycopg2.extensions.register_type(psycopg2.extensions.UNICODE, self.conn) data = data.decode('latin1') curs.execute("SELECT %s::text;", (data,)) res = curs.fetchone()[0] self.assertEqual(res, data) self.assert_(not self.conn.notices) def test_koi8(self): self.conn.set_client_encoding('KOI8') curs = self.conn.cursor() if sys.version_info[0] < 3: data = ''.join(map(chr, range(32, 127) + range(128, 256))) else: data = bytes(range(32, 127) + range(128, 256)).decode('koi8_r') # as string curs.execute("SELECT %s::text;", (data,)) res = curs.fetchone()[0] self.assertEqual(res, data) self.assert_(not self.conn.notices) # as unicode if sys.version_info[0] < 3: psycopg2.extensions.register_type(psycopg2.extensions.UNICODE, self.conn) data = data.decode('koi8_r') curs.execute("SELECT %s::text;", (data,)) res = curs.fetchone()[0] self.assertEqual(res, data) self.assert_(not self.conn.notices) class TestQuotedString(ConnectingTestCase): def test_encoding_from_conn(self): q = psycopg2.extensions.QuotedString('hi') self.assertEqual(q.encoding, 'latin1') self.conn.set_client_encoding('utf_8') q.prepare(self.conn) self.assertEqual(q.encoding, 'utf_8') def test_encoding_default(self): from psycopg2.extensions import adapt a = adapt("hello") self.assertEqual(a.encoding, 'latin1') self.assertEqual(a.getquoted(), b("'hello'")) # NOTE: we can't really test an encoding different from utf8, because # when encoding without connection the libpq will use parameters from # a previous one, so what would happens depends jn the tests run order. # egrave = u'\xe8' # self.assertEqual(adapt(egrave).getquoted(), "'\xe8'") def test_encoding_error(self): from psycopg2.extensions import adapt snowman = u"\u2603" a = adapt(snowman) self.assertRaises(UnicodeEncodeError, a.getquoted) def test_set_encoding(self): # Note: this works-ish mostly in case when the standard db connection # we test with is utf8, otherwise the encoding chosen by PQescapeString # may give bad results. from psycopg2.extensions import adapt snowman = u"\u2603" a = adapt(snowman) a.encoding = 'utf8' self.assertEqual(a.encoding, 'utf8') q = a.getquoted() self.assert_(q in (b("'\xe2\x98\x83'"), b("E'\xe2\x98\x83'")), q) def test_connection_wins_anyway(self): from psycopg2.extensions import adapt snowman = u"\u2603" a = adapt(snowman) a.encoding = 'latin9' self.conn.set_client_encoding('utf8') a.prepare(self.conn) self.assertEqual(a.encoding, 'utf_8') q = a.getquoted() self.assert_(q in (b("'\xe2\x98\x83'"), b("E'\xe2\x98\x83'")), q) @testutils.skip_before_python(3) def test_adapt_bytes(self): snowman = u"\u2603" self.conn.set_client_encoding('utf8') a = psycopg2.extensions.QuotedString(snowman.encode('utf8')) a.prepare(self.conn) q = a.getquoted() self.assert_(q in (b("'\xe2\x98\x83'"), b("E'\xe2\x98\x83'")), q) def test_suite(): return unittest.TestLoader().loadTestsFromName(__name__) if __name__ == "__main__": unittest.main()