psycopg2/tests/types_extras.py

#!/usr/bin/env python
#
# types_extras.py - tests for extras types conversions
#
# Copyright (C) 2008-2010 Federico Di Gregorio  <fog@debian.org>
#
# 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.
#
# 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.

try:
    import decimal
except:
    pass
import re
import sys
import unittest
import warnings

import psycopg2
import psycopg2.extras
import tests


class TypesExtrasTests(unittest.TestCase):
    """Test that all type conversions are working."""

    def setUp(self):
        self.conn = psycopg2.connect(tests.dsn)

    def execute(self, *args):
        curs = self.conn.cursor()
        curs.execute(*args)
        return curs.fetchone()[0]

    def testUUID(self):
        try:
            import uuid
            psycopg2.extras.register_uuid()
        except:
            return
        u = uuid.UUID('9c6d5a77-7256-457e-9461-347b4358e350')
        s = self.execute("SELECT %s AS foo", (u,))
        self.failUnless(u == s)
        # must survive NULL cast to a uuid
        s = self.execute("SELECT NULL::uuid AS foo")
        self.failUnless(s is None)

    def testUUIDARRAY(self):
        try:
            import uuid
            psycopg2.extras.register_uuid()
        except:
            return
        u = [uuid.UUID('9c6d5a77-7256-457e-9461-347b4358e350'), uuid.UUID('9c6d5a77-7256-457e-9461-347b4358e352')]
        s = self.execute("SELECT %s AS foo", (u,))
        self.failUnless(u == s)
        # array with a NULL element
        u = [uuid.UUID('9c6d5a77-7256-457e-9461-347b4358e350'), None]
        s = self.execute("SELECT %s AS foo", (u,))
        self.failUnless(u == s)
        # must survive NULL cast to a uuid[]
        s = self.execute("SELECT NULL::uuid[] AS foo")
        self.failUnless(s is None)
        # what about empty arrays?
        s = self.execute("SELECT '{}'::uuid[] AS foo")
        self.failUnless(type(s) == list and len(s) == 0)

    def testINET(self):
        psycopg2.extras.register_inet()
        i = "192.168.1.0/24";
        s = self.execute("SELECT %s AS foo", (i,))
        self.failUnless(i == s)
        # must survive NULL cast to inet
        s = self.execute("SELECT NULL::inet AS foo")
        self.failUnless(s is None)

    def test_inet_conform(self):
        from psycopg2.extras import Inet
        i = Inet("192.168.1.0/24")
        a = psycopg2.extensions.adapt(i)
        a.prepare(self.conn)
        self.assertEqual("E'192.168.1.0/24'::inet", a.getquoted())

        # adapts ok with unicode too
        i = Inet(u"192.168.1.0/24")
        a = psycopg2.extensions.adapt(i)
        a.prepare(self.conn)
        self.assertEqual("E'192.168.1.0/24'::inet", a.getquoted())

    def test_adapt_fail(self):
        class Foo(object): pass
        self.assertRaises(psycopg2.ProgrammingError,
            psycopg2.extensions.adapt, Foo(), psycopg2.extensions.ISQLQuote, None)
        try:
            psycopg2.extensions.adapt(Foo(), psycopg2.extensions.ISQLQuote, None)
        except psycopg2.ProgrammingError, err:
            self.failUnless(str(err) == "can't adapt type 'Foo'")


class HstoreTestCase(unittest.TestCase):
    def setUp(self):
        self.conn = psycopg2.connect(tests.dsn)

    def test_adapt_8(self):
        if self.conn.server_version >= 90000:
            warnings.warn("skipping dict adaptation with PG pre-9 syntax")
            return

        from psycopg2.extras import HstoreAdapter

        o = {'a': '1', 'b': "'", 'c': None, 'd': u'\xe0'}
        a = HstoreAdapter(o)
        a.prepare(self.conn)
        q = a.getquoted()

        self.assert_(q.startswith("(("), q)
        self.assert_(q.endswith("))"), q)
        ii = q[1:-1].split("||")
        ii.sort()

        self.assertEqual(ii[0], "(E'a' => E'1')")
        self.assertEqual(ii[1], "(E'b' => E'''')")
        self.assertEqual(ii[2], "(E'c' => NULL)")
        encc = u'\xe0'.encode(psycopg2.extensions.encodings[self.conn.encoding])
        self.assertEqual(ii[3], "(E'd' => E'%s')" % encc)

    def test_adapt_9(self):
        if self.conn.server_version < 90000:
            warnings.warn("skipping dict adaptation with PG 9 syntax")
            return

        from psycopg2.extras import HstoreAdapter

        o = {'a': '1', 'b': "'", 'c': None, 'd': u'\xe0'}
        a = HstoreAdapter(o)
        a.prepare(self.conn)
        q = a.getquoted()

        m = re.match(r'hstore\(ARRAY\[([^\]]+)\], ARRAY\[([^\]]+)\]\)', q)
        self.assert_(m, repr(q))

        kk = m.group(1).split(", ")
        vv = m.group(2).split(", ")
        ii = zip(kk, vv)
        ii.sort()

        self.assertEqual(ii[0], ("E'a'", "E'1'"))
        self.assertEqual(ii[1], ("E'b'", "E''''"))
        self.assertEqual(ii[2], ("E'c'", "NULL"))
        encc = u'\xe0'.encode(psycopg2.extensions.encodings[self.conn.encoding])
        self.assertEqual(ii[3], ("E'd'", "E'%s'" % encc))


def test_suite():
    return unittest.TestLoader().loadTestsFromName(__name__)

if __name__ == "__main__":
    unittest.main()