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# -*- coding: utf-8 -*-
from __future__ import absolute_import, print_function, division
import logging
import pytest
import petl as etl
from petl.test.helpers import ieq
logger = logging.getLogger(__name__)
debug = logger.debug
def _test_dbo(write_dbo, read_dbo=None):
if read_dbo is None:
read_dbo = write_dbo
expect_empty = (('foo', 'bar'),)
expect = (('foo', 'bar'),
('a', 1),
('b', 2))
expect_appended = (('foo', 'bar'),
('a', 1),
('b', 2),
('a', 1),
('b', 2))
actual = etl.fromdb(read_dbo, 'SELECT * FROM test')
debug('verify empty to start with...')
debug(etl.look(actual))
ieq(expect_empty, actual)
debug('write some data and verify...')
etl.todb(expect, write_dbo, 'test')
debug(etl.look(actual))
ieq(expect, actual)
debug('append some data and verify...')
etl.appenddb(expect, write_dbo, 'test')
debug(etl.look(actual))
ieq(expect_appended, actual)
debug('overwrite and verify...')
etl.todb(expect, write_dbo, 'test')
debug(etl.look(actual))
ieq(expect, actual)
debug('cut, overwrite and verify')
etl.todb(etl.cut(expect, 'bar', 'foo'), write_dbo, 'test')
debug(etl.look(actual))
ieq(expect, actual)
debug('cut, append and verify')
etl.appenddb(etl.cut(expect, 'bar', 'foo'), write_dbo, 'test')
debug(etl.look(actual))
ieq(expect_appended, actual)
debug('try a single row')
etl.todb(etl.head(expect, 1), write_dbo, 'test')
debug(etl.look(actual))
ieq(etl.head(expect, 1), actual)
def _test_with_schema(dbo, schema):
expect = (('foo', 'bar'),
('a', 1),
('b', 2))
expect_appended = (('foo', 'bar'),
('a', 1),
('b', 2),
('a', 1),
('b', 2))
actual = etl.fromdb(dbo, 'SELECT * FROM test')
print('write some data and verify...')
etl.todb(expect, dbo, 'test', schema=schema)
ieq(expect, actual)
print(etl.look(actual))
print('append some data and verify...')
etl.appenddb(expect, dbo, 'test', schema=schema)
ieq(expect_appended, actual)
print(etl.look(actual))
def _test_unicode(dbo):
expect = ((u'name', u'id'),
(u'Արամ Խաչատրյան', 1),
(u'Johann Strauß', 2),
(u'Вагиф Сәмәдоғлу', 3),
(u'章子怡', 4),
)
actual = etl.fromdb(dbo, 'SELECT * FROM test_unicode')
print('write some data and verify...')
etl.todb(expect, dbo, 'test_unicode')
ieq(expect, actual)
print(etl.look(actual))
def _setup_mysql(dbapi_connection):
# setup table
cursor = dbapi_connection.cursor()
# deal with quote compatibility
cursor.execute('SET SQL_MODE=ANSI_QUOTES')
cursor.execute('DROP TABLE IF EXISTS test')
cursor.execute('CREATE TABLE test (foo TEXT, bar INT)')
cursor.execute('DROP TABLE IF EXISTS test_unicode')
cursor.execute('CREATE TABLE test_unicode (name TEXT, id INT) '
'CHARACTER SET utf8')
cursor.close()
dbapi_connection.commit()
def _setup_postgresql(dbapi_connection):
# setup table
cursor = dbapi_connection.cursor()
cursor.execute('DROP TABLE IF EXISTS test')
cursor.execute('CREATE TABLE test (foo TEXT, bar INT)')
cursor.execute('DROP TABLE IF EXISTS test_unicode')
# assume character encoding UTF-8 already set at database level
cursor.execute('CREATE TABLE test_unicode (name TEXT, id INT)')
cursor.close()
dbapi_connection.commit()
def _setup_sqlalchemy_quotes(dbapi_connection, connection_record):
cursor = dbapi_connection.cursor()
cursor.execute("SET sql_mode = 'ANSI_QUOTES'")
host, user, password, database = '127.0.0.1', 'petl', 'test', 'petl'
SKIP_PYMYSQL = False
try:
import pymysql
import sqlalchemy
pymysql.connect(host=host,
user=user,
password=password,
database=database)
except Exception as e:
SKIP_PYMYSQL = 'SKIP pymysql tests: %s' % e
finally:
@pytest.mark.skipif(bool(SKIP_PYMYSQL), reason=str(SKIP_PYMYSQL))
def test_pymysql():
import pymysql
connect = pymysql.connect
# assume database already created
dbapi_connection = connect(host=host,
user=user,
password=password,
database=database)
# exercise using a dbapi_connection
_setup_mysql(dbapi_connection)
_test_dbo(dbapi_connection)
# exercise using a dbapi_cursor
_setup_mysql(dbapi_connection)
dbapi_cursor = dbapi_connection.cursor()
_test_dbo(dbapi_cursor)
dbapi_cursor.close()
# exercise sqlalchemy dbapi_connection
_setup_mysql(dbapi_connection)
from sqlalchemy import create_engine
sqlalchemy_engine = create_engine('mysql+pymysql://%s:%s@%s/%s' %
(user, password, host, database))
from sqlalchemy.event import listen
listen(sqlalchemy_engine, "connect", _setup_sqlalchemy_quotes)
sqlalchemy_connection = sqlalchemy_engine.connect()
_test_dbo(sqlalchemy_connection)
sqlalchemy_connection.close()
# exercise sqlalchemy session
_setup_mysql(dbapi_connection)
from sqlalchemy.orm import sessionmaker
Session = sessionmaker(bind=sqlalchemy_engine)
sqlalchemy_session = Session()
_test_dbo(sqlalchemy_session)
sqlalchemy_session.close()
# exercise sqlalchemy engine
_setup_mysql(dbapi_connection)
sqlalchemy_engine2 = create_engine('mysql+pymysql://%s:%s@%s/%s' %
(user, password, host, database), echo_pool='debug')
listen(sqlalchemy_engine2, "connect", _setup_sqlalchemy_quotes)
_test_dbo(sqlalchemy_engine2)
sqlalchemy_engine2.dispose()
# other exercises
_test_with_schema(dbapi_connection, database)
utf8_connection = connect(host=host, user=user,
password=password,
database=database,
charset='utf8')
utf8_connection.cursor().execute('SET SQL_MODE=ANSI_QUOTES')
_test_unicode(utf8_connection)
utf8_connection.close()
SKIP_MYSQLDB = False
try:
import MySQLdb
import sqlalchemy
MySQLdb.connect(host=host,
user=user,
passwd=password,
db=database)
except Exception as e:
SKIP_MYSQLDB = 'SKIP MySQLdb tests: %s' % e
finally:
@pytest.mark.skipif(bool(SKIP_MYSQLDB), reason=str(SKIP_MYSQLDB))
def test_mysqldb():
import MySQLdb
connect = MySQLdb.connect
# assume database already created
dbapi_connection = connect(host=host,
user=user,
passwd=password,
db=database)
# exercise using a dbapi_connection
_setup_mysql(dbapi_connection)
_test_dbo(dbapi_connection)
# exercise using a dbapi_cursor
_setup_mysql(dbapi_connection)
dbapi_cursor = dbapi_connection.cursor()
_test_dbo(dbapi_cursor)
dbapi_cursor.close()
# exercise sqlalchemy dbapi_connection
_setup_mysql(dbapi_connection)
from sqlalchemy import create_engine
sqlalchemy_engine = create_engine('mysql+mysqldb://%s:%s@%s/%s' %
(user, password, host, database))
from sqlalchemy.event import listen
listen(sqlalchemy_engine, "connect", _setup_sqlalchemy_quotes)
sqlalchemy_connection = sqlalchemy_engine.connect()
sqlalchemy_connection.execute('SET SQL_MODE=ANSI_QUOTES')
_test_dbo(sqlalchemy_connection)
sqlalchemy_connection.close()
# exercise sqlalchemy session
_setup_mysql(dbapi_connection)
from sqlalchemy.orm import sessionmaker
Session = sessionmaker(bind=sqlalchemy_engine)
sqlalchemy_session = Session()
_test_dbo(sqlalchemy_session)
sqlalchemy_session.close()
# other exercises
_test_with_schema(dbapi_connection, database)
utf8_connection = connect(host=host, user=user,
passwd=password,
db=database,
charset='utf8')
utf8_connection.cursor().execute('SET SQL_MODE=ANSI_QUOTES')
_test_unicode(utf8_connection)
SKIP_TEST_POSTGRES = False
try:
import psycopg2
import sqlalchemy
psycopg2.connect(
'host=%s dbname=%s user=%s password=%s'
% (host, database, user, password)
)
except Exception as e:
SKIP_TEST_POSTGRES = 'SKIP psycopg2 tests: %s' % e
finally:
@pytest.mark.skipif(bool(SKIP_TEST_POSTGRES), reason=str(SKIP_TEST_POSTGRES))
def test_postgresql():
import psycopg2
import psycopg2.extensions
psycopg2.extensions.register_type(psycopg2.extensions.UNICODE)
psycopg2.extensions.register_type(psycopg2.extensions.UNICODEARRAY)
# assume database already created
dbapi_connection = psycopg2.connect(
'host=%s dbname=%s user=%s password=%s'
% (host, database, user, password)
)
# exercise using a dbapi_connection
_setup_postgresql(dbapi_connection)
_test_dbo(dbapi_connection)
# exercise using a dbapi_cursor
_setup_postgresql(dbapi_connection)
dbapi_cursor = dbapi_connection.cursor()
_test_dbo(dbapi_cursor)
dbapi_cursor.close()
# exercise sqlalchemy dbapi_connection
_setup_postgresql(dbapi_connection)
from sqlalchemy import create_engine
sqlalchemy_engine = create_engine('postgresql+psycopg2://%s:%s@%s/%s' %
(user, password, host, database))
sqlalchemy_connection = sqlalchemy_engine.connect()
_test_dbo(sqlalchemy_connection)
sqlalchemy_connection.close()
# exercise sqlalchemy session
_setup_postgresql(dbapi_connection)
from sqlalchemy.orm import sessionmaker
Session = sessionmaker(bind=sqlalchemy_engine)
sqlalchemy_session = Session()
_test_dbo(sqlalchemy_session)
sqlalchemy_session.close()
# other exercises
_test_dbo(dbapi_connection,
lambda: dbapi_connection.cursor(name='arbitrary'))
_test_with_schema(dbapi_connection, 'public')
_test_unicode(dbapi_connection)
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