mirror of
https://github.com/psycopg/psycopg2.git
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99b3c72312
- Raise an exception on incomplete placeholders. - Minor speedups. - Don't change the string in place (??!!) if the placeholder is not s and the value is null. The latter point can be done because downstream we don't accept anything different from s anyway (in the Bytes_Format function). Notice that now the format string is constant whatever the arguments. This means that executemany is still more inefficient than it should be as mogrify may work only on the parameters. However this is an implementation only worthwhile if we start supporting real parameters. Let's talk about that for the next release.
181 lines
6.6 KiB
Python
Executable File
181 lines
6.6 KiB
Python
Executable File
#!/usr/bin/env python
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# test_cursor.py - unit test for cursor attributes
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#
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# Copyright (C) 2010-2011 Daniele Varrazzo <daniele.varrazzo@gmail.com>
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#
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# psycopg2 is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# In addition, as a special exception, the copyright holders give
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# permission to link this program with the OpenSSL library (or with
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# modified versions of OpenSSL that use the same license as OpenSSL),
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# and distribute linked combinations including the two.
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#
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# You must obey the GNU Lesser General Public License in all respects for
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# all of the code used other than OpenSSL.
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#
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# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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# License for more details.
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import time
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import psycopg2
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import psycopg2.extensions
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from psycopg2.extensions import b
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from testconfig import dsn
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from testutils import unittest, skip_before_postgres
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class CursorTests(unittest.TestCase):
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def setUp(self):
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self.conn = psycopg2.connect(dsn)
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def tearDown(self):
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self.conn.close()
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def test_executemany_propagate_exceptions(self):
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conn = self.conn
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cur = conn.cursor()
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cur.execute("create temp table test_exc (data int);")
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def buggygen():
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yield 1//0
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self.assertRaises(ZeroDivisionError,
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cur.executemany, "insert into test_exc values (%s)", buggygen())
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cur.close()
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def test_mogrify_unicode(self):
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conn = self.conn
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cur = conn.cursor()
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# test consistency between execute and mogrify.
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# unicode query containing only ascii data
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cur.execute(u"SELECT 'foo';")
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self.assertEqual('foo', cur.fetchone()[0])
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self.assertEqual(b("SELECT 'foo';"), cur.mogrify(u"SELECT 'foo';"))
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conn.set_client_encoding('UTF8')
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snowman = u"\u2603"
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# unicode query with non-ascii data
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cur.execute(u"SELECT '%s';" % snowman)
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self.assertEqual(snowman.encode('utf8'), b(cur.fetchone()[0]))
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self.assertEqual(("SELECT '%s';" % snowman).encode('utf8'),
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cur.mogrify(u"SELECT '%s';" % snowman).replace(b("E'"), b("'")))
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# unicode args
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cur.execute("SELECT %s;", (snowman,))
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self.assertEqual(snowman.encode("utf-8"), b(cur.fetchone()[0]))
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self.assertEqual(("SELECT '%s';" % snowman).encode('utf8'),
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cur.mogrify("SELECT %s;", (snowman,)).replace(b("E'"), b("'")))
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# unicode query and args
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cur.execute(u"SELECT %s;", (snowman,))
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self.assertEqual(snowman.encode("utf-8"), b(cur.fetchone()[0]))
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self.assertEqual(("SELECT '%s';" % snowman).encode('utf8'),
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cur.mogrify(u"SELECT %s;", (snowman,)).replace(b("E'"), b("'")))
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def test_mogrify_decimal_explodes(self):
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# issue #7: explodes on windows with python 2.5 and psycopg 2.2.2
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try:
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from decimal import Decimal
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except:
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return
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conn = self.conn
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cur = conn.cursor()
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self.assertEqual(b('SELECT 10.3;'),
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cur.mogrify("SELECT %s;", (Decimal("10.3"),)))
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def test_bad_placeholder(self):
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cur = self.conn.cursor()
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self.assertRaises(psycopg2.ProgrammingError,
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cur.mogrify, "select %(foo", {})
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self.assertRaises(psycopg2.ProgrammingError,
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cur.mogrify, "select %(foo", {'foo': 1})
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self.assertRaises(psycopg2.ProgrammingError,
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cur.mogrify, "select %(foo, %(bar)", {'foo': 1})
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self.assertRaises(psycopg2.ProgrammingError,
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cur.mogrify, "select %(foo, %(bar)", {'foo': 1, 'bar': 2})
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def test_cast(self):
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curs = self.conn.cursor()
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self.assertEqual(42, curs.cast(20, '42'))
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self.assertAlmostEqual(3.14, curs.cast(700, '3.14'))
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try:
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from decimal import Decimal
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except ImportError:
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self.assertAlmostEqual(123.45, curs.cast(1700, '123.45'))
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else:
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self.assertEqual(Decimal('123.45'), curs.cast(1700, '123.45'))
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from datetime import date
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self.assertEqual(date(2011,1,2), curs.cast(1082, '2011-01-02'))
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self.assertEqual("who am i?", curs.cast(705, 'who am i?')) # unknown
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def test_cast_specificity(self):
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curs = self.conn.cursor()
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self.assertEqual("foo", curs.cast(705, 'foo'))
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D = psycopg2.extensions.new_type((705,), "DOUBLING", lambda v, c: v * 2)
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psycopg2.extensions.register_type(D, self.conn)
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self.assertEqual("foofoo", curs.cast(705, 'foo'))
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T = psycopg2.extensions.new_type((705,), "TREBLING", lambda v, c: v * 3)
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psycopg2.extensions.register_type(T, curs)
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self.assertEqual("foofoofoo", curs.cast(705, 'foo'))
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curs2 = self.conn.cursor()
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self.assertEqual("foofoo", curs2.cast(705, 'foo'))
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def test_weakref(self):
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from weakref import ref
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curs = self.conn.cursor()
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w = ref(curs)
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del curs
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self.assert_(w() is None)
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@skip_before_postgres(8, 2)
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def test_iter_named_cursor_efficient(self):
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curs = self.conn.cursor('tmp')
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# if these records are fetched in the same roundtrip their
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# timestamp will not be influenced by the pause in Python world.
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curs.execute("""select clock_timestamp() from generate_series(1,2)""")
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i = iter(curs)
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t1 = (i.next())[0] # the brackets work around a 2to3 bug
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time.sleep(0.2)
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t2 = (i.next())[0]
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self.assert_((t2 - t1).microseconds * 1e-6 < 0.1,
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"named cursor records fetched in 2 roundtrips (delta: %s)"
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% (t2 - t1))
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@skip_before_postgres(8, 0)
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def test_iter_named_cursor_default_itersize(self):
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curs = self.conn.cursor('tmp')
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curs.execute('select generate_series(1,50)')
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rv = [ (r[0], curs.rownumber) for r in curs ]
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# everything swallowed in one gulp
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self.assertEqual(rv, [(i,i) for i in range(1,51)])
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@skip_before_postgres(8, 0)
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def test_iter_named_cursor_itersize(self):
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curs = self.conn.cursor('tmp')
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curs.itersize = 30
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curs.execute('select generate_series(1,50)')
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rv = [ (r[0], curs.rownumber) for r in curs ]
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# everything swallowed in two gulps
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self.assertEqual(rv, [(i,((i - 1) % 30) + 1) for i in range(1,51)])
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def test_suite():
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return unittest.TestLoader().loadTestsFromName(__name__)
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if __name__ == "__main__":
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unittest.main()
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