mirror of
https://github.com/psycopg/psycopg2.git
synced 2024-11-27 03:13:43 +03:00
270 lines
8.8 KiB
Python
270 lines
8.8 KiB
Python
#!/usr/bin/env python
|
|
#
|
|
# extras_dictcursor - test if DictCursor extension class works
|
|
#
|
|
# 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.
|
|
#
|
|
# 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 psycopg2
|
|
import psycopg2.extras
|
|
import unittest
|
|
|
|
import tests
|
|
|
|
|
|
class ExtrasDictCursorTests(unittest.TestCase):
|
|
"""Test if DictCursor extension class works."""
|
|
|
|
def setUp(self):
|
|
self.conn = psycopg2.connect(tests.dsn)
|
|
curs = self.conn.cursor()
|
|
curs.execute("CREATE TEMPORARY TABLE ExtrasDictCursorTests (foo text)")
|
|
curs.execute("INSERT INTO ExtrasDictCursorTests VALUES ('bar')")
|
|
self.conn.commit()
|
|
|
|
def tearDown(self):
|
|
self.conn.close()
|
|
|
|
def testDictCursorWithPlainCursorFetchOne(self):
|
|
self._testWithPlainCursor(lambda curs: curs.fetchone())
|
|
|
|
def testDictCursorWithPlainCursorFetchMany(self):
|
|
self._testWithPlainCursor(lambda curs: curs.fetchmany(100)[0])
|
|
|
|
def testDictCursorWithPlainCursorFetchAll(self):
|
|
self._testWithPlainCursor(lambda curs: curs.fetchall()[0])
|
|
|
|
def testDictCursorWithPlainCursorIter(self):
|
|
def getter(curs):
|
|
for row in curs:
|
|
return row
|
|
self._testWithPlainCursor(getter)
|
|
|
|
def testDictCursorWithPlainCursorRealFetchOne(self):
|
|
self._testWithPlainCursorReal(lambda curs: curs.fetchone())
|
|
|
|
def testDictCursorWithPlainCursorRealFetchMany(self):
|
|
self._testWithPlainCursorReal(lambda curs: curs.fetchmany(100)[0])
|
|
|
|
def testDictCursorWithPlainCursorRealFetchAll(self):
|
|
self._testWithPlainCursorReal(lambda curs: curs.fetchall()[0])
|
|
|
|
def testDictCursorWithPlainCursorRealIter(self):
|
|
def getter(curs):
|
|
for row in curs:
|
|
return row
|
|
self._testWithPlainCursorReal(getter)
|
|
|
|
def testDictCursorWithNamedCursorFetchOne(self):
|
|
self._testWithNamedCursor(lambda curs: curs.fetchone())
|
|
|
|
def testDictCursorWithNamedCursorFetchMany(self):
|
|
self._testWithNamedCursor(lambda curs: curs.fetchmany(100)[0])
|
|
|
|
def testDictCursorWithNamedCursorFetchAll(self):
|
|
self._testWithNamedCursor(lambda curs: curs.fetchall()[0])
|
|
|
|
def testDictCursorWithNamedCursorIter(self):
|
|
def getter(curs):
|
|
for row in curs:
|
|
return row
|
|
self._testWithNamedCursor(getter)
|
|
|
|
def _testWithPlainCursor(self, getter):
|
|
curs = self.conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
|
|
curs.execute("SELECT * FROM ExtrasDictCursorTests")
|
|
row = getter(curs)
|
|
self.failUnless(row['foo'] == 'bar')
|
|
self.failUnless(row[0] == 'bar')
|
|
|
|
def _testWithNamedCursor(self, getter):
|
|
curs = self.conn.cursor('aname', cursor_factory=psycopg2.extras.DictCursor)
|
|
curs.execute("SELECT * FROM ExtrasDictCursorTests")
|
|
row = getter(curs)
|
|
self.failUnless(row['foo'] == 'bar')
|
|
self.failUnless(row[0] == 'bar')
|
|
|
|
def _testWithPlainCursorReal(self, getter):
|
|
curs = self.conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
|
|
curs.execute("SELECT * FROM ExtrasDictCursorTests")
|
|
row = getter(curs)
|
|
self.failUnless(row['foo'] == 'bar')
|
|
|
|
def _testWithNamedCursorReal(self, getter):
|
|
curs = self.conn.cursor('aname', cursor_factory=psycopg2.extras.RealDictCursor)
|
|
curs.execute("SELECT * FROM ExtrasDictCursorTests")
|
|
row = getter(curs)
|
|
self.failUnless(row['foo'] == 'bar')
|
|
|
|
|
|
def if_has_namedtuple(f):
|
|
def if_has_namedtuple_(self):
|
|
try:
|
|
from collections import namedtuple
|
|
except ImportError:
|
|
import warnings
|
|
warnings.warn("collections.namedtuple not available")
|
|
else:
|
|
return f(self)
|
|
|
|
if_has_namedtuple_.__name__ = f.__name__
|
|
return if_has_namedtuple_
|
|
|
|
class NamedTupleCursorTest(unittest.TestCase):
|
|
def setUp(self):
|
|
from psycopg2.extras import NamedTupleConnection
|
|
|
|
try:
|
|
from collections import namedtuple
|
|
except ImportError:
|
|
self.conn = None
|
|
return
|
|
|
|
self.conn = psycopg2.connect(tests.dsn,
|
|
connection_factory=NamedTupleConnection)
|
|
curs = self.conn.cursor()
|
|
curs.execute("CREATE TEMPORARY TABLE nttest (i int, s text)")
|
|
curs.execute(
|
|
"INSERT INTO nttest VALUES (1, 'foo'), (2, 'bar'), (3, 'baz')")
|
|
self.conn.commit()
|
|
|
|
@if_has_namedtuple
|
|
def test_fetchone(self):
|
|
curs = self.conn.cursor()
|
|
curs.execute("select * from nttest where i = 1")
|
|
t = curs.fetchone()
|
|
self.assertEqual(t[0], 1)
|
|
self.assertEqual(t.i, 1)
|
|
self.assertEqual(t[1], 'foo')
|
|
self.assertEqual(t.s, 'foo')
|
|
|
|
@if_has_namedtuple
|
|
def test_fetchmany(self):
|
|
curs = self.conn.cursor()
|
|
curs.execute("select * from nttest order by 1")
|
|
res = curs.fetchmany(2)
|
|
self.assertEqual(2, len(res))
|
|
self.assertEqual(res[0].i, 1)
|
|
self.assertEqual(res[0].s, 'foo')
|
|
self.assertEqual(res[1].i, 2)
|
|
self.assertEqual(res[1].s, 'bar')
|
|
|
|
@if_has_namedtuple
|
|
def test_fetchall(self):
|
|
curs = self.conn.cursor()
|
|
curs.execute("select * from nttest order by 1")
|
|
res = curs.fetchall()
|
|
self.assertEqual(3, len(res))
|
|
self.assertEqual(res[0].i, 1)
|
|
self.assertEqual(res[0].s, 'foo')
|
|
self.assertEqual(res[1].i, 2)
|
|
self.assertEqual(res[1].s, 'bar')
|
|
self.assertEqual(res[2].i, 3)
|
|
self.assertEqual(res[2].s, 'baz')
|
|
|
|
@if_has_namedtuple
|
|
def test_iter(self):
|
|
curs = self.conn.cursor()
|
|
curs.execute("select * from nttest order by 1")
|
|
i = iter(curs)
|
|
t = i.next()
|
|
self.assertEqual(t.i, 1)
|
|
self.assertEqual(t.s, 'foo')
|
|
t = i.next()
|
|
self.assertEqual(t.i, 2)
|
|
self.assertEqual(t.s, 'bar')
|
|
t = i.next()
|
|
self.assertEqual(t.i, 3)
|
|
self.assertEqual(t.s, 'baz')
|
|
self.assertRaises(StopIteration, i.next)
|
|
|
|
def test_error_message(self):
|
|
try:
|
|
from collections import namedtuple
|
|
except ImportError:
|
|
# an import error somewhere
|
|
from psycopg2.extras import NamedTupleConnection
|
|
try:
|
|
self.conn = psycopg2.connect(tests.dsn,
|
|
connection_factory=NamedTupleConnection)
|
|
curs = self.conn.cursor()
|
|
curs.execute("select 1")
|
|
curs.fetchone()
|
|
except ImportError:
|
|
pass
|
|
else:
|
|
self.fail("expecting ImportError")
|
|
else:
|
|
# skip the test
|
|
pass
|
|
|
|
@if_has_namedtuple
|
|
def test_record_updated(self):
|
|
curs = self.conn.cursor()
|
|
curs.execute("select 1 as foo;")
|
|
r = curs.fetchone()
|
|
self.assertEqual(r.foo, 1)
|
|
|
|
curs.execute("select 2 as bar;")
|
|
r = curs.fetchone()
|
|
self.assertEqual(r.bar, 2)
|
|
self.assertRaises(AttributeError, getattr, r, 'foo')
|
|
|
|
@if_has_namedtuple
|
|
def test_no_result_no_surprise(self):
|
|
curs = self.conn.cursor()
|
|
curs.execute("update nttest set s = s")
|
|
self.assertRaises(psycopg2.ProgrammingError, curs.fetchone)
|
|
|
|
curs.execute("update nttest set s = s")
|
|
self.assertRaises(psycopg2.ProgrammingError, curs.fetchall)
|
|
|
|
@if_has_namedtuple
|
|
def test_minimal_generation(self):
|
|
# Instrument the class to verify it gets called the minimum number of times.
|
|
from psycopg2.extras import NamedTupleCursor
|
|
f_orig = NamedTupleCursor._make_nt
|
|
calls = [0]
|
|
def f_patched(self_):
|
|
calls[0] += 1
|
|
return f_orig(self_)
|
|
|
|
NamedTupleCursor._make_nt = f_patched
|
|
|
|
try:
|
|
curs = self.conn.cursor()
|
|
curs.execute("select * from nttest order by 1")
|
|
curs.fetchone()
|
|
curs.fetchone()
|
|
curs.fetchone()
|
|
self.assertEqual(1, calls[0])
|
|
|
|
curs.execute("select * from nttest order by 1")
|
|
curs.fetchone()
|
|
curs.fetchall()
|
|
self.assertEqual(2, calls[0])
|
|
|
|
curs.execute("select * from nttest order by 1")
|
|
curs.fetchone()
|
|
curs.fetchmany(1)
|
|
self.assertEqual(3, calls[0])
|
|
|
|
finally:
|
|
NamedTupleCursor._make_nt = f_orig
|
|
|
|
|
|
def test_suite():
|
|
return unittest.TestLoader().loadTestsFromName(__name__)
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|