/usr/lib/python2.7/dist-packages/psycopg2/tests/test_copy.py is in python-psycopg2 2.6.1-1build2.
This file is owned by root:root, with mode 0o644.
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# test_copy.py - unit test for COPY support
#
# Copyright (C) 2010-2011 Daniele Varrazzo <daniele.varrazzo@gmail.com>
#
# 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 string
from testutils import unittest, ConnectingTestCase, decorate_all_tests
from testutils import skip_if_no_iobase, skip_before_postgres
from cStringIO import StringIO
from itertools import cycle, izip
from subprocess import Popen, PIPE
import psycopg2
import psycopg2.extensions
from testutils import skip_copy_if_green, script_to_py3
from testconfig import dsn
if sys.version_info[0] < 3:
_base = object
else:
from io import TextIOBase as _base
class MinimalRead(_base):
"""A file wrapper exposing the minimal interface to copy from."""
def __init__(self, f):
self.f = f
def read(self, size):
return self.f.read(size)
def readline(self):
return self.f.readline()
class MinimalWrite(_base):
"""A file wrapper exposing the minimal interface to copy to."""
def __init__(self, f):
self.f = f
def write(self, data):
return self.f.write(data)
class CopyTests(ConnectingTestCase):
def setUp(self):
ConnectingTestCase.setUp(self)
self._create_temp_table()
def _create_temp_table(self):
curs = self.conn.cursor()
curs.execute('''
CREATE TEMPORARY TABLE tcopy (
id serial PRIMARY KEY,
data text
)''')
def test_copy_from(self):
curs = self.conn.cursor()
try:
self._copy_from(curs, nrecs=1024, srec=10*1024, copykw={})
finally:
curs.close()
def test_copy_from_insane_size(self):
# Trying to trigger a "would block" error
curs = self.conn.cursor()
try:
self._copy_from(curs, nrecs=10*1024, srec=10*1024,
copykw={'size': 20*1024*1024})
finally:
curs.close()
def test_copy_from_cols(self):
curs = self.conn.cursor()
f = StringIO()
for i in xrange(10):
f.write("%s\n" % (i,))
f.seek(0)
curs.copy_from(MinimalRead(f), "tcopy", columns=['id'])
curs.execute("select * from tcopy order by id")
self.assertEqual([(i, None) for i in range(10)], curs.fetchall())
def test_copy_from_cols_err(self):
curs = self.conn.cursor()
f = StringIO()
for i in xrange(10):
f.write("%s\n" % (i,))
f.seek(0)
def cols():
raise ZeroDivisionError()
yield 'id'
self.assertRaises(ZeroDivisionError,
curs.copy_from, MinimalRead(f), "tcopy", columns=cols())
def test_copy_to(self):
curs = self.conn.cursor()
try:
self._copy_from(curs, nrecs=1024, srec=10*1024, copykw={})
self._copy_to(curs, srec=10*1024)
finally:
curs.close()
@skip_if_no_iobase
def test_copy_text(self):
self.conn.set_client_encoding('latin1')
self._create_temp_table() # the above call closed the xn
if sys.version_info[0] < 3:
abin = ''.join(map(chr, range(32, 127) + range(160, 256)))
about = abin.decode('latin1').replace('\\', '\\\\')
else:
abin = bytes(range(32, 127) + range(160, 256)).decode('latin1')
about = abin.replace('\\', '\\\\')
curs = self.conn.cursor()
curs.execute('insert into tcopy values (%s, %s)',
(42, abin))
import io
f = io.StringIO()
curs.copy_to(f, 'tcopy', columns=('data',))
f.seek(0)
self.assertEqual(f.readline().rstrip(), about)
@skip_if_no_iobase
def test_copy_bytes(self):
self.conn.set_client_encoding('latin1')
self._create_temp_table() # the above call closed the xn
if sys.version_info[0] < 3:
abin = ''.join(map(chr, range(32, 127) + range(160, 255)))
about = abin.replace('\\', '\\\\')
else:
abin = bytes(range(32, 127) + range(160, 255)).decode('latin1')
about = abin.replace('\\', '\\\\').encode('latin1')
curs = self.conn.cursor()
curs.execute('insert into tcopy values (%s, %s)',
(42, abin))
import io
f = io.BytesIO()
curs.copy_to(f, 'tcopy', columns=('data',))
f.seek(0)
self.assertEqual(f.readline().rstrip(), about)
@skip_if_no_iobase
def test_copy_expert_textiobase(self):
self.conn.set_client_encoding('latin1')
self._create_temp_table() # the above call closed the xn
if sys.version_info[0] < 3:
abin = ''.join(map(chr, range(32, 127) + range(160, 256)))
abin = abin.decode('latin1')
about = abin.replace('\\', '\\\\')
else:
abin = bytes(range(32, 127) + range(160, 256)).decode('latin1')
about = abin.replace('\\', '\\\\')
import io
f = io.StringIO()
f.write(about)
f.seek(0)
curs = self.conn.cursor()
psycopg2.extensions.register_type(
psycopg2.extensions.UNICODE, curs)
curs.copy_expert('COPY tcopy (data) FROM STDIN', f)
curs.execute("select data from tcopy;")
self.assertEqual(curs.fetchone()[0], abin)
f = io.StringIO()
curs.copy_expert('COPY tcopy (data) TO STDOUT', f)
f.seek(0)
self.assertEqual(f.readline().rstrip(), about)
# same tests with setting size
f = io.StringIO()
f.write(about)
f.seek(0)
exp_size = 123
# hack here to leave file as is, only check size when reading
real_read = f.read
def read(_size, f=f, exp_size=exp_size):
self.assertEqual(_size, exp_size)
return real_read(_size)
f.read = read
curs.copy_expert('COPY tcopy (data) FROM STDIN', f, size=exp_size)
curs.execute("select data from tcopy;")
self.assertEqual(curs.fetchone()[0], abin)
def _copy_from(self, curs, nrecs, srec, copykw):
f = StringIO()
for i, c in izip(xrange(nrecs), cycle(string.ascii_letters)):
l = c * srec
f.write("%s\t%s\n" % (i,l))
f.seek(0)
curs.copy_from(MinimalRead(f), "tcopy", **copykw)
curs.execute("select count(*) from tcopy")
self.assertEqual(nrecs, curs.fetchone()[0])
curs.execute("select data from tcopy where id < %s order by id",
(len(string.ascii_letters),))
for i, (l,) in enumerate(curs):
self.assertEqual(l, string.ascii_letters[i] * srec)
def _copy_to(self, curs, srec):
f = StringIO()
curs.copy_to(MinimalWrite(f), "tcopy")
f.seek(0)
ntests = 0
for line in f:
n, s = line.split()
if int(n) < len(string.ascii_letters):
self.assertEqual(s, string.ascii_letters[int(n)] * srec)
ntests += 1
self.assertEqual(ntests, len(string.ascii_letters))
def test_copy_expert_file_refcount(self):
class Whatever(object):
pass
f = Whatever()
curs = self.conn.cursor()
self.assertRaises(TypeError,
curs.copy_expert, 'COPY tcopy (data) FROM STDIN', f)
def test_copy_no_column_limit(self):
cols = [ "c%050d" % i for i in range(200) ]
curs = self.conn.cursor()
curs.execute('CREATE TEMPORARY TABLE manycols (%s)' % ',\n'.join(
[ "%s int" % c for c in cols]))
curs.execute("INSERT INTO manycols DEFAULT VALUES")
f = StringIO()
curs.copy_to(f, "manycols", columns = cols)
f.seek(0)
self.assertEqual(f.read().split(), ['\\N'] * len(cols))
f.seek(0)
curs.copy_from(f, "manycols", columns = cols)
curs.execute("select count(*) from manycols;")
self.assertEqual(curs.fetchone()[0], 2)
@skip_before_postgres(8, 2) # they don't send the count
def test_copy_rowcount(self):
curs = self.conn.cursor()
curs.copy_from(StringIO('aaa\nbbb\nccc\n'), 'tcopy', columns=['data'])
self.assertEqual(curs.rowcount, 3)
curs.copy_expert(
"copy tcopy (data) from stdin",
StringIO('ddd\neee\n'))
self.assertEqual(curs.rowcount, 2)
curs.copy_to(StringIO(), "tcopy")
self.assertEqual(curs.rowcount, 5)
curs.execute("insert into tcopy (data) values ('fff')")
curs.copy_expert("copy tcopy to stdout", StringIO())
self.assertEqual(curs.rowcount, 6)
def test_copy_rowcount_error(self):
curs = self.conn.cursor()
curs.execute("insert into tcopy (data) values ('fff')")
self.assertEqual(curs.rowcount, 1)
self.assertRaises(psycopg2.DataError,
curs.copy_from, StringIO('aaa\nbbb\nccc\n'), 'tcopy')
self.assertEqual(curs.rowcount, -1)
def test_copy_from_segfault(self):
# issue #219
script = ("""\
import psycopg2
conn = psycopg2.connect(%(dsn)r)
curs = conn.cursor()
curs.execute("create table copy_segf (id int)")
try:
curs.execute("copy copy_segf from stdin")
except psycopg2.ProgrammingError:
pass
conn.close()
""" % { 'dsn': dsn,})
proc = Popen([sys.executable, '-c', script_to_py3(script)])
proc.communicate()
self.assertEqual(0, proc.returncode)
def test_copy_to_segfault(self):
# issue #219
script = ("""\
import psycopg2
conn = psycopg2.connect(%(dsn)r)
curs = conn.cursor()
curs.execute("create table copy_segf (id int)")
try:
curs.execute("copy copy_segf to stdout")
except psycopg2.ProgrammingError:
pass
conn.close()
""" % { 'dsn': dsn,})
proc = Popen([sys.executable, '-c', script_to_py3(script)], stdout=PIPE)
proc.communicate()
self.assertEqual(0, proc.returncode)
def test_copy_from_propagate_error(self):
class BrokenRead(_base):
def read(self, size):
return 1/0
def readline(self):
return 1/0
curs = self.conn.cursor()
# It seems we cannot do this, but now at least we propagate the error
# self.assertRaises(ZeroDivisionError,
# curs.copy_from, BrokenRead(), "tcopy")
try:
curs.copy_from(BrokenRead(), "tcopy")
except Exception, e:
self.assert_('ZeroDivisionError' in str(e))
def test_copy_to_propagate_error(self):
class BrokenWrite(_base):
def write(self, data):
return 1/0
curs = self.conn.cursor()
curs.execute("insert into tcopy values (10, 'hi')")
self.assertRaises(ZeroDivisionError,
curs.copy_to, BrokenWrite(), "tcopy")
decorate_all_tests(CopyTests, skip_copy_if_green)
def test_suite():
return unittest.TestLoader().loadTestsFromName(__name__)
if __name__ == "__main__":
unittest.main()
|