/
test_system_dbapi.py
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/
test_system_dbapi.py
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# Copyright 2016 Google LLC All rights reserved.
#
# 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 hashlib
import os
import pickle
import unittest
from google.api_core import exceptions
from google.cloud.spanner_v1 import Client
from google.cloud.spanner_v1 import BurstyPool
from google.cloud.spanner_dbapi.connection import Connection
from test_utils.retry import RetryErrors
from .test_system import (
CREATE_INSTANCE,
EXISTING_INSTANCES,
INSTANCE_ID,
USE_EMULATOR,
_list_instances,
Config,
)
def setUpModule():
if USE_EMULATOR:
from google.auth.credentials import AnonymousCredentials
emulator_project = os.getenv("GCLOUD_PROJECT", "emulator-test-project")
Config.CLIENT = Client(
project=emulator_project, credentials=AnonymousCredentials()
)
else:
Config.CLIENT = Client()
retry = RetryErrors(exceptions.ServiceUnavailable)
configs = list(retry(Config.CLIENT.list_instance_configs)())
instances = retry(_list_instances)()
EXISTING_INSTANCES[:] = instances
if CREATE_INSTANCE:
if not USE_EMULATOR:
# Defend against back-end returning configs for regions we aren't
# actually allowed to use.
configs = [config for config in configs if "-us-" in config.name]
if not configs:
raise ValueError("List instance configs failed in module set up.")
Config.INSTANCE_CONFIG = configs[0]
config_name = configs[0].name
Config.INSTANCE = Config.CLIENT.instance(INSTANCE_ID, config_name)
created_op = Config.INSTANCE.create()
created_op.result(30) # block until completion
else:
Config.INSTANCE = Config.CLIENT.instance(INSTANCE_ID)
Config.INSTANCE.reload()
def tearDownModule():
if CREATE_INSTANCE:
Config.INSTANCE.delete()
class TestTransactionsManagement(unittest.TestCase):
"""Transactions management support tests."""
DATABASE_NAME = "db-api-transactions-management"
DDL_STATEMENTS = (
"""CREATE TABLE contacts (
contact_id INT64,
first_name STRING(1024),
last_name STRING(1024),
email STRING(1024)
)
PRIMARY KEY (contact_id)""",
)
@classmethod
def setUpClass(cls):
"""Create a test database."""
cls._db = Config.INSTANCE.database(
cls.DATABASE_NAME,
ddl_statements=cls.DDL_STATEMENTS,
pool=BurstyPool(labels={"testcase": "database_api"}),
)
cls._db.create().result(30) # raises on failure / timeout.
@classmethod
def tearDownClass(cls):
"""Delete the test database."""
cls._db.drop()
def tearDown(self):
"""Clear the test table after every test."""
self._db.run_in_transaction(clear_table)
def test_commit(self):
"""Test committing a transaction with several statements."""
want_row = (
1,
"updated-first-name",
"last-name",
"test.email_updated@domen.ru",
)
# connect to the test database
conn = Connection(Config.INSTANCE, self._db)
cursor = conn.cursor()
# execute several DML statements within one transaction
cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (1, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
cursor.execute(
"""
UPDATE contacts
SET first_name = 'updated-first-name'
WHERE first_name = 'first-name'
"""
)
cursor.execute(
"""
UPDATE contacts
SET email = 'test.email_updated@domen.ru'
WHERE email = 'test.email@domen.ru'
"""
)
conn.commit()
# read the resulting data from the database
cursor.execute("SELECT * FROM contacts")
got_rows = cursor.fetchall()
conn.commit()
self.assertEqual(got_rows, [want_row])
cursor.close()
conn.close()
def test_rollback(self):
"""Test rollbacking a transaction with several statements."""
want_row = (2, "first-name", "last-name", "test.email@domen.ru")
# connect to the test database
conn = Connection(Config.INSTANCE, self._db)
cursor = conn.cursor()
cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (2, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
conn.commit()
# execute several DMLs with one transaction
cursor.execute(
"""
UPDATE contacts
SET first_name = 'updated-first-name'
WHERE first_name = 'first-name'
"""
)
cursor.execute(
"""
UPDATE contacts
SET email = 'test.email_updated@domen.ru'
WHERE email = 'test.email@domen.ru'
"""
)
conn.rollback()
# read the resulting data from the database
cursor.execute("SELECT * FROM contacts")
got_rows = cursor.fetchall()
conn.commit()
self.assertEqual(got_rows, [want_row])
cursor.close()
conn.close()
def test_autocommit_mode_change(self):
"""Test auto committing a transaction on `autocommit` mode change."""
want_row = (
2,
"updated-first-name",
"last-name",
"test.email@domen.ru",
)
# connect to the test database
conn = Connection(Config.INSTANCE, self._db)
cursor = conn.cursor()
cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (2, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
cursor.execute(
"""
UPDATE contacts
SET first_name = 'updated-first-name'
WHERE first_name = 'first-name'
"""
)
conn.autocommit = True
# read the resulting data from the database
cursor.execute("SELECT * FROM contacts")
got_rows = cursor.fetchall()
self.assertEqual(got_rows, [want_row])
cursor.close()
conn.close()
def test_rollback_on_connection_closing(self):
"""
When closing a connection all the pending transactions
must be rollbacked. Testing if it's working this way.
"""
want_row = (1, "first-name", "last-name", "test.email@domen.ru")
# connect to the test database
conn = Connection(Config.INSTANCE, self._db)
cursor = conn.cursor()
cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (1, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
conn.commit()
cursor.execute(
"""
UPDATE contacts
SET first_name = 'updated-first-name'
WHERE first_name = 'first-name'
"""
)
conn.close()
# connect again, as the previous connection is no-op after closing
conn = Connection(Config.INSTANCE, self._db)
cursor = conn.cursor()
# read the resulting data from the database
cursor.execute("SELECT * FROM contacts")
got_rows = cursor.fetchall()
conn.commit()
self.assertEqual(got_rows, [want_row])
cursor.close()
conn.close()
def test_results_checksum(self):
"""Test that results checksum is calculated properly."""
conn = Connection(Config.INSTANCE, self._db)
cursor = conn.cursor()
cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES
(1, 'first-name', 'last-name', 'test.email@domen.ru'),
(2, 'first-name2', 'last-name2', 'test.email2@domen.ru')
"""
)
self.assertEqual(len(conn._statements), 1)
conn.commit()
cursor.execute("SELECT * FROM contacts")
got_rows = cursor.fetchall()
self.assertEqual(len(conn._statements), 1)
conn.commit()
checksum = hashlib.sha256()
checksum.update(pickle.dumps(got_rows[0]))
checksum.update(pickle.dumps(got_rows[1]))
self.assertEqual(cursor._checksum.checksum.digest(), checksum.digest())
def test_execute_many(self):
# connect to the test database
conn = Connection(Config.INSTANCE, self._db)
cursor = conn.cursor()
cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (1, 'first-name', 'last-name', 'test.email@example.com'),
(2, 'first-name2', 'last-name2', 'test.email2@example.com')
"""
)
conn.commit()
cursor.executemany(
"""
SELECT * FROM contacts WHERE contact_id = @a1
""",
({"a1": 1}, {"a1": 2}),
)
res = cursor.fetchall()
conn.commit()
self.assertEqual(len(res), 2)
self.assertEqual(res[0][0], 1)
self.assertEqual(res[1][0], 2)
# checking that execute() and executemany()
# results are not mixed together
cursor.execute(
"""
SELECT * FROM contacts WHERE contact_id = 1
""",
)
res = cursor.fetchone()
conn.commit()
self.assertEqual(res[0], 1)
conn.close()
def clear_table(transaction):
"""Clear the test table."""
transaction.execute_update("DELETE FROM contacts WHERE true")