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import unittest
import pytest
import pymssql as pym
from .helpers import (pymssqlconn, PyTableBase, CursorBase, eq_, config,
skip_test)
class TestDBAPI2(object):
def test_version(self):
assert pym.__version__
class TestTransaction(unittest.TestCase, PyTableBase):
tname = 'users'
cols = (
'name varchar(50)',
)
def setUp(self):
PyTableBase.setUp(self)
# make sure we start with a fresh connection for transaction tests
# so that previous transaction activities don't taint a test
self.newconn()
def test_immediate_rollback(self):
# just making sure this doesn't throw an exception
self.conn.rollback()
def test_multiple_rollbacks(self):
# just making sure this doesn't throw an exception
self.conn.rollback()
self.conn.rollback()
self.conn.rollback()
def test_rollback(self):
cur = self.conn.cursor()
cur.execute('insert into users values (%s)', 'foobar')
eq_(self.row_count(), 1)
self.conn.rollback()
eq_(self.row_count(), 0)
def test_commit(self):
cur = self.conn.cursor()
cur.execute('insert into users values (%s)', 'foobar')
eq_(self.row_count(), 1)
self.conn.commit()
self.conn.rollback()
eq_(self.row_count(), 1)
def test_rollback_after_error(self):
cur = self.conn.cursor()
cur.execute('insert into users values (%s)', 'foobar')
eq_(self.row_count(), 1)
try:
cur.execute('insert into notable values (%s)', '123')
except pym.ProgrammingError as e:
if 'notable' not in str(e):
raise
# encountered an error, so we want to rollback
self.conn.rollback()
# rollback should have resulted in user's insert getting rolled back
# too
eq_(self.row_count(), 0)
def test_rollback_after_create_error(self):
"""
test_rollback_after_create_error
For some reason, SQL server will issue a batch-abort
if the statement is a CREATE statement and it fails. This means
the transaction is implicitly rolled back and a subsequent call to
rollback() without special handling would result in an error.
"""
cur = self.conn.cursor()
cur.execute('insert into users values (%s)', 'foobar')
eq_(self.row_count(), 1)
try:
cur.execute("CREATE TABLE badschema.t1 ( test1 CHAR(5) NOT NULL)")
except pym.OperationalError as e:
if 'badschema' not in str(e):
raise
# encountered an error, so we want to rollback
self.conn.rollback()
# rollback should have resulted in user's insert getting rolled back
# too
eq_(self.row_count(), 0)
class TestCursor(CursorBase):
dbmod = pym
@classmethod
def newconn(cls):
cls.conn = pymssqlconn()
class TestBasicConnection(unittest.TestCase):
def connect(self, conn_props=None):
return pym.connect(
server=config.server,
user=config.user,
password=config.password,
database=config.database,
port=config.port,
conn_properties=conn_props
)
def test_conn_props_override(self):
conn = self.connect(conn_props='SET TEXTSIZE 2147483647')
conn.close()
conn = self.connect(conn_props='SET TEXTSIZE 2147483647;')
conn.close()
conn = self.connect(conn_props='SET TEXTSIZE 2147483647;SET ANSI_NULLS ON;')
conn.close()
conn = self.connect(conn_props='SET TEXTSIZE 2147483647;SET ANSI_NULLS ON')
conn.close()
conn = self.connect(conn_props='SET TEXTSIZE 2147483647;'
'SET ANSI_NULLS ON;')
conn.close()
conn = self.connect(conn_props=['SET TEXTSIZE 2147483647;', 'SET ANSI_NULLS ON'])
conn.close()
self.assertRaises(Exception, self.connect, conn_props='BOGUS SQL')
conn = pym.connect(
conn_properties='SET TEXTSIZE 2147483647',
server=config.server,
user=config.user,
password=config.password
)
conn.close()
class TestAutocommit(unittest.TestCase, PyTableBase):
tname = 'test'
cols = (
'name varchar(50)',
)
insert_query = 'INSERT INTO {tname} VALUES (%s)'.format(tname=tname)
select_query = 'SELECT * FROM {tname} WHERE name = (%s)'.format(tname=tname)
test_db_name = 'autocommit_test_database'
def setUp(self):
PyTableBase.setUp(self)
def tearDown(self):
self.conn._conn.execute_non_query("IF EXISTS(select * from sys.databases where name='{0}') DROP DATABASE {0}".format(self.test_db_name))
def test_db_creation_with_autocommit(self):
"""
Try creating and dropping database with autocommit
"""
cur = pymssqlconn(autocommit=True).cursor()
try:
cur.execute("CREATE DATABASE {0}".format(self.test_db_name))
except pym.OperationalError as e:
expected_msg = "CREATE DATABASE permission denied in database 'master'"
if expected_msg in str(e.args[1]):
skip_test('We have no CREATE DATABASE permission on test database')
else:
pytest.fail()
else:
cur.execute("DROP DATABASE {0}".format(self.test_db_name))
def test_db_creation_without_autocommit(self):
"""
Try creating and dropping database without autocommit, expecting it to fail
"""
cur = pymssqlconn(autocommit=False).cursor()
with pytest.raises(pym.OperationalError) as excinfo:
cur.execute("CREATE DATABASE autocommit_test_database")
expected_msg = "CREATE DATABASE statement not allowed within multi-statement transaction"
assert expected_msg in excinfo.exconly()
def test_autocommit_flipping_tf(self):
insert_value = 'true-false'
conn = pymssqlconn(autocommit=True)
conn.autocommit(False)
cur = conn.cursor()
cur.execute(self.insert_query, insert_value)
conn.commit()
cur.execute(self.select_query, insert_value)
row = cur.fetchone()
cur.close()
conn.close()
assert len(row) > 0
def test_autocommit_flipping_ft(self):
insert_value = 'false-true'
conn = pymssqlconn(autocommit=False)
conn.autocommit(True)
cur = conn.cursor()
cur.execute(self.insert_query, insert_value)
cur.execute(self.select_query, insert_value)
row = cur.fetchone()
assert len(row) > 0
def test_autocommit_false_does_not_commit(self):
insert_value = 'false'
conn = pymssqlconn(autocommit=False)
cur = conn.cursor()
cur.execute(self.insert_query, insert_value)
conn.rollback()
cur.execute(self.select_query, insert_value)
row = cur.fetchone()
cur.close()
conn.close()
assert row is None
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