subunit2sql/subunit2sql/tests/db_test_utils.py

90 lines
3.1 KiB
Python

# Copyright 2015 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
import tempfile
from alembic import command
from alembic import config as alembic_config
from oslo_config import cfg
import sqlalchemy
from subunit2sql.db import api as session
CONF = cfg.CONF
SQLITE_TEST_DATABASE_PATH = tempfile.mkstemp('subunit2sql.db')[1]
script_location = os.path.join(os.path.dirname(os.path.dirname(
os.path.abspath(__file__))), 'migrations')
def get_connect_string(backend,
user="openstack_citest",
passwd="openstack_citest",
database="openstack_citest"):
"""Generate a db uri for testing locally.
Try to get a connection with a very specific set of values, if we get
these then we'll run the tests, otherwise they are skipped
"""
if backend == "mysql":
backend = "mysql+pymysql"
elif backend == "postgres":
backend = "postgresql+psycopg2"
if backend == "sqlite":
return "sqlite:///" + SQLITE_TEST_DATABASE_PATH
return ("%(backend)s://%(user)s:%(passwd)s@localhost/%(database)s"
% {'backend': backend, 'user': user, 'passwd': passwd,
'database': database})
def is_backend_avail(backend,
user="openstack_citest",
passwd="openstack_citest",
database="openstack_citest"):
try:
if backend == "mysql":
connect_uri = get_connect_string("mysql", user=user,
passwd=passwd, database=database)
elif backend == "postgres":
connect_uri = get_connect_string("postgres", user=user,
passwd=passwd, database=database)
elif backend == "sqlite":
return True
engine = sqlalchemy.create_engine(connect_uri)
connection = engine.connect()
except Exception:
# intentionally catch all to handle exceptions even if we don't
# have any backend code loaded.
return False
else:
connection.close()
engine.dispose()
return True
def run_migration(target, engine=None):
engine = engine or session.get_engine()
engine.connect()
config = alembic_config.Config(os.path.join(script_location,
'alembic.ini'))
config.set_main_option('script_location', 'subunit2sql:migrations')
config.subunit2sql_config = CONF
with engine.begin() as connection:
config.attributes['connection'] = connection
command.upgrade(config, target)
engine.dispose()