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psycopg2/tests/types_basic.py

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#!/usr/bin/env python
#
# types_basic.py - tests for basic types conversions
#
# Copyright (C) 2004-2010 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.
#
# 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.
try:
import decimal
except:
pass
import sys
import testutils
from testutils import unittest, decorate_all_tests
from testconfig import dsn
import psycopg2
from psycopg2.extensions import b
class TypesBasicTests(unittest.TestCase):
"""Test that all type conversions are working."""
def setUp(self):
self.conn = psycopg2.connect(dsn)
def tearDown(self):
self.conn.close()
def execute(self, *args):
curs = self.conn.cursor()
curs.execute(*args)
return curs.fetchone()[0]
def testQuoting(self):
s = "Quote'this\\! ''ok?''"
self.failUnless(self.execute("SELECT %s AS foo", (s,)) == s,
"wrong quoting: " + s)
def testUnicode(self):
s = u"Quote'this\\! ''ok?''"
self.failUnless(self.execute("SELECT %s AS foo", (s,)) == s,
"wrong unicode quoting: " + s)
def testNumber(self):
s = self.execute("SELECT %s AS foo", (1971,))
self.failUnless(s == 1971, "wrong integer quoting: " + str(s))
s = self.execute("SELECT %s AS foo", (1971L,))
self.failUnless(s == 1971L, "wrong integer quoting: " + str(s))
if sys.version_info[0:2] < (2, 4):
s = self.execute("SELECT %s AS foo", (19.10,))
self.failUnless(abs(s - 19.10) < 0.001,
"wrong float quoting: " + str(s))
def testBoolean(self):
x = self.execute("SELECT %s as foo", (False,))
self.assert_(x is False)
x = self.execute("SELECT %s as foo", (True,))
self.assert_(x is True)
def testDecimal(self):
if sys.version_info[0:2] >= (2, 4):
s = self.execute("SELECT %s AS foo", (decimal.Decimal("19.10"),))
self.failUnless(s - decimal.Decimal("19.10") == 0,
"wrong decimal quoting: " + str(s))
s = self.execute("SELECT %s AS foo", (decimal.Decimal("NaN"),))
self.failUnless(str(s) == "NaN", "wrong decimal quoting: " + str(s))
self.failUnless(type(s) == decimal.Decimal, "wrong decimal conversion: " + repr(s))
s = self.execute("SELECT %s AS foo", (decimal.Decimal("infinity"),))
self.failUnless(str(s) == "NaN", "wrong decimal quoting: " + str(s))
self.failUnless(type(s) == decimal.Decimal, "wrong decimal conversion: " + repr(s))
s = self.execute("SELECT %s AS foo", (decimal.Decimal("-infinity"),))
self.failUnless(str(s) == "NaN", "wrong decimal quoting: " + str(s))
self.failUnless(type(s) == decimal.Decimal, "wrong decimal conversion: " + repr(s))
else:
return self.skipTest("decimal not available")
def testFloatNan(self):
try:
float("nan")
except ValueError:
return self.skipTest("nan not available on this platform")
s = self.execute("SELECT %s AS foo", (float("nan"),))
self.failUnless(str(s) == "nan", "wrong float quoting: " + str(s))
self.failUnless(type(s) == float, "wrong float conversion: " + repr(s))
def testFloatInf(self):
try:
self.execute("select 'inf'::float")
except psycopg2.DataError:
return self.skipTest("inf::float not available on the server")
except ValueError:
return self.skipTest("inf not available on this platform")
s = self.execute("SELECT %s AS foo", (float("inf"),))
self.failUnless(str(s) == "inf", "wrong float quoting: " + str(s))
self.failUnless(type(s) == float, "wrong float conversion: " + repr(s))
s = self.execute("SELECT %s AS foo", (float("-inf"),))
self.failUnless(str(s) == "-inf", "wrong float quoting: " + str(s))
def testBinary(self):
if sys.version_info[0] < 3:
s = ''.join([chr(x) for x in range(256)])
b = psycopg2.Binary(s)
buf = self.execute("SELECT %s::bytea AS foo", (b,))
self.assertEqual(s, str(buf))
else:
s = bytes(range(256))
b = psycopg2.Binary(s)
buf = self.execute("SELECT %s::bytea AS foo", (b,))
self.assertEqual(s, buf)
def testBinaryNone(self):
b = psycopg2.Binary(None)
buf = self.execute("SELECT %s::bytea AS foo", (b,))
self.assertEqual(buf, None)
def testBinaryEmptyString(self):
# test to make sure an empty Binary is converted to an empty string
if sys.version_info[0] < 3:
b = psycopg2.Binary('')
self.assertEqual(str(b), "''::bytea")
else:
b = psycopg2.Binary(bytes([]))
self.assertEqual(str(b), "''::bytea")
def testBinaryRoundTrip(self):
# test to make sure buffers returned by psycopg2 are
# understood by execute:
if sys.version_info[0] < 3:
s = ''.join([chr(x) for x in range(256)])
buf = self.execute("SELECT %s::bytea AS foo", (psycopg2.Binary(s),))
buf2 = self.execute("SELECT %s::bytea AS foo", (buf,))
self.assertEqual(s, str(buf2))
else:
s = bytes(range(256))
buf = self.execute("SELECT %s::bytea AS foo", (psycopg2.Binary(s),))
buf2 = self.execute("SELECT %s::bytea AS foo", (buf,))
self.assertEqual(s, buf2)
def testArray(self):
s = self.execute("SELECT %s AS foo", ([[1,2],[3,4]],))
self.failUnlessEqual(s, [[1,2],[3,4]])
s = self.execute("SELECT %s AS foo", (['one', 'two', 'three'],))
self.failUnlessEqual(s, ['one', 'two', 'three'])
def testEmptyArrayRegression(self):
# ticket #42
import datetime
curs = self.conn.cursor()
curs.execute("create table array_test (id integer, col timestamp without time zone[])")
curs.execute("insert into array_test values (%s, %s)", (1, [datetime.date(2011,2,14)]))
curs.execute("select col from array_test where id = 1")
self.assertEqual(curs.fetchone()[0], [datetime.datetime(2011, 2, 14, 0, 0)])
curs.execute("insert into array_test values (%s, %s)", (2, []))
curs.execute("select col from array_test where id = 2")
self.assertEqual(curs.fetchone()[0], [])
def testEmptyArray(self):
s = self.execute("SELECT '{}' AS foo")
self.failUnlessEqual(s, [])
s = self.execute("SELECT '{}'::text[] AS foo")
self.failUnlessEqual(s, [])
s = self.execute("SELECT %s AS foo", ([],))
self.failUnlessEqual(s, [])
s = self.execute("SELECT 1 != ALL(%s)", ([],))
self.failUnlessEqual(s, True)
# but don't break the strings :)
s = self.execute("SELECT '{}'::text AS foo")
self.failUnlessEqual(s, "{}")
def testArrayEscape(self):
ss = ['', '\\', '"', '\\\\', '\\"']
for s in ss:
r = self.execute("SELECT %s AS foo", (s,))
self.failUnlessEqual(s, r)
r = self.execute("SELECT %s AS foo", ([s],))
self.failUnlessEqual([s], r)
r = self.execute("SELECT %s AS foo", (ss,))
self.failUnlessEqual(ss, r)
@testutils.skip_from_python(3)
def testTypeRoundtripBuffer(self):
o1 = buffer("".join(map(chr, range(256))))
o2 = self.execute("select %s;", (o1,))
self.assertEqual(type(o1), type(o2))
# Test with an empty buffer
o1 = buffer("")
o2 = self.execute("select %s;", (o1,))
self.assertEqual(type(o1), type(o2))
self.assertEqual(str(o1), str(o2))
@testutils.skip_from_python(3)
def testTypeRoundtripBufferArray(self):
o1 = buffer("".join(map(chr, range(256))))
o1 = [o1]
o2 = self.execute("select %s;", (o1,))
self.assertEqual(type(o1[0]), type(o2[0]))
self.assertEqual(str(o1[0]), str(o2[0]))
@testutils.skip_before_python(3)
def testTypeRoundtripBytes(self):
o1 = bytes(range(256))
o2 = self.execute("select %s;", (o1,))
self.assertEqual(memoryview, type(o2))
# Test with an empty buffer
o1 = bytes([])
o2 = self.execute("select %s;", (o1,))
self.assertEqual(memoryview, type(o2))
@testutils.skip_before_python(3)
def testTypeRoundtripBytesArray(self):
o1 = bytes(range(256))
o1 = [o1]
o2 = self.execute("select %s;", (o1,))
self.assertEqual(memoryview, type(o2[0]))
@testutils.skip_before_python(2, 6)
def testAdaptBytearray(self):
o1 = bytearray(range(256))
o2 = self.execute("select %s;", (o1,))
if sys.version_info[0] < 3:
self.assertEqual(buffer, type(o2))
else:
self.assertEqual(memoryview, type(o2))
self.assertEqual(len(o1), len(o2))
for c1, c2 in zip(o1, o2):
self.assertEqual(c1, ord(c2))
# Test with an empty buffer
o1 = bytearray([])
o2 = self.execute("select %s;", (o1,))
self.assertEqual(len(o2), 0)
if sys.version_info[0] < 3:
self.assertEqual(buffer, type(o2))
else:
self.assertEqual(memoryview, type(o2))
@testutils.skip_before_python(2, 7)
def testAdaptMemoryview(self):
o1 = memoryview(bytearray(range(256)))
o2 = self.execute("select %s;", (o1,))
if sys.version_info[0] < 3:
self.assertEqual(buffer, type(o2))
else:
self.assertEqual(memoryview, type(o2))
# Test with an empty buffer
o1 = memoryview(bytearray([]))
o2 = self.execute("select %s;", (o1,))
if sys.version_info[0] < 3:
self.assertEqual(buffer, type(o2))
else:
self.assertEqual(memoryview, type(o2))
def testByteaHexCheckFalsePositive(self):
# the check \x -> x to detect bad bytea decode
# may be fooled if the first char is really an 'x'
o1 = psycopg2.Binary(b('x'))
o2 = self.execute("SELECT %s::bytea AS foo", (o1,))
self.assertEqual(b('x'), o2[0])
def testNegNumber(self):
d1 = self.execute("select -%s;", (decimal.Decimal('-1.0'),))
self.assertEqual(1, d1)
f1 = self.execute("select -%s;", (-1.0,))
self.assertEqual(1, f1)
i1 = self.execute("select -%s;", (-1,))
self.assertEqual(1, i1)
l1 = self.execute("select -%s;", (-1L,))
self.assertEqual(1, l1)
def testGenericArray(self):
def caster(s, cur):
if s is None: return "nada"
return int(s) * 2
base = psycopg2.extensions.new_type((23,), "INT4", caster)
array = psycopg2.extensions.new_array_type((1007,), "INT4ARRAY", base)
psycopg2.extensions.register_type(array, self.conn)
a = self.execute("select '{1,2,3}'::int4[]")
self.assertEqual(a, [2,4,6])
a = self.execute("select '{1,2,NULL}'::int4[]")
self.assertEqual(a, [2,4,'nada'])
class AdaptSubclassTest(unittest.TestCase):
def test_adapt_subtype(self):
from psycopg2.extensions import adapt
class Sub(str): pass
s1 = "hel'lo"
s2 = Sub(s1)
self.assertEqual(adapt(s1).getquoted(), adapt(s2).getquoted())
def test_adapt_most_specific(self):
from psycopg2.extensions import adapt, register_adapter, AsIs
class A(object): pass
class B(A): pass
class C(B): pass
register_adapter(A, lambda a: AsIs("a"))
register_adapter(B, lambda b: AsIs("b"))
try:
self.assertEqual(b('b'), adapt(C()).getquoted())
finally:
del psycopg2.extensions.adapters[A, psycopg2.extensions.ISQLQuote]
del psycopg2.extensions.adapters[B, psycopg2.extensions.ISQLQuote]
@testutils.skip_from_python(3)
def test_no_mro_no_joy(self):
from psycopg2.extensions import adapt, register_adapter, AsIs
class A: pass
class B(A): pass
register_adapter(A, lambda a: AsIs("a"))
try:
self.assertRaises(psycopg2.ProgrammingError, adapt, B())
finally:
del psycopg2.extensions.adapters[A, psycopg2.extensions.ISQLQuote]
@testutils.skip_before_python(3)
def test_adapt_subtype_3(self):
from psycopg2.extensions import adapt, register_adapter, AsIs
class A: pass
class B(A): pass
register_adapter(A, lambda a: AsIs("a"))
try:
self.assertEqual(b("a"), adapt(B()).getquoted())
finally:
del psycopg2.extensions.adapters[A, psycopg2.extensions.ISQLQuote]
class ByteaParserTest(unittest.TestCase):
"""Unit test for our bytea format parser."""
def setUp(self):
try:
self._cast = self._import_cast()
except Exception, e:
self._cast = None
self._exc = e
def _import_cast(self):
"""Use ctypes to access the C function.
Raise any sort of error: we just support this where ctypes works as
expected.
"""
import ctypes
lib = ctypes.cdll.LoadLibrary(psycopg2._psycopg.__file__)
cast = lib.typecast_BINARY_cast
cast.argtypes = [ctypes.c_char_p, ctypes.c_size_t, ctypes.py_object]
cast.restype = ctypes.py_object
return cast
def cast(self, buffer):
"""Cast a buffer from the output format"""
l = buffer and len(buffer) or 0
rv = self._cast(buffer, l, None)
if rv is None:
return None
if sys.version_info[0] < 3:
return str(rv)
else:
return rv.tobytes()
def test_null(self):
rv = self.cast(None)
self.assertEqual(rv, None)
def test_blank(self):
rv = self.cast(b(''))
self.assertEqual(rv, b(''))
def test_blank_hex(self):
# Reported as problematic in ticket #48
rv = self.cast(b('\\x'))
self.assertEqual(rv, b(''))
def test_full_hex(self, upper=False):
buf = ''.join(("%02x" % i) for i in range(256))
if upper: buf = buf.upper()
buf = '\\x' + buf
rv = self.cast(b(buf))
if sys.version_info[0] < 3:
self.assertEqual(rv, ''.join(map(chr, range(256))))
else:
self.assertEqual(rv, bytes(range(256)))
def test_full_hex_upper(self):
return self.test_full_hex(upper=True)
def test_full_escaped_octal(self):
buf = ''.join(("\\%03o" % i) for i in range(256))
rv = self.cast(b(buf))
if sys.version_info[0] < 3:
self.assertEqual(rv, ''.join(map(chr, range(256))))
else:
self.assertEqual(rv, bytes(range(256)))
def test_escaped_mixed(self):
import string
buf = ''.join(("\\%03o" % i) for i in range(32))
buf += string.ascii_letters
buf += ''.join('\\' + c for c in string.ascii_letters)
buf += '\\\\'
rv = self.cast(b(buf))
if sys.version_info[0] < 3:
tgt = ''.join(map(chr, range(32))) \
+ string.ascii_letters * 2 + '\\'
else:
tgt = bytes(range(32)) + \
(string.ascii_letters * 2 + '\\').encode('ascii')
self.assertEqual(rv, tgt)
def skip_if_cant_cast(f):
def skip_if_cant_cast_(self, *args, **kwargs):
if self._cast is None:
return self.skipTest("can't test bytea parser: %s - %s"
% (self._exc.__class__.__name__, self._exc))
return f(self, *args, **kwargs)
return skip_if_cant_cast_
decorate_all_tests(ByteaParserTest, skip_if_cant_cast)
def test_suite():
return unittest.TestLoader().loadTestsFromName(__name__)
if __name__ == "__main__":
unittest.main()
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