python-spanner-orm/spanner_orm/tests/migrations_test.py at master · NeoTim/python-spanner-orm · GitHub

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# python3

# 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

# https://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 logging

import os

import shutil

import stat

import tempfile

import unittest

from unittest import mock

from spanner_orm import error

from spanner_orm.admin import migration

from spanner_orm.admin import migration_executor

from spanner_orm.admin import migration_manager

from spanner_orm.admin import update

class MigrationsTest(unittest.TestCase):

TEST_DIR = tempfile.mkdtemp()

TEST_MIGRATIONS_DIR = os.path.join(TEST_DIR, 'migrations')

def test_retrieve(self):

testdata_filename = os.path.join(os.path.dirname(__file__),

'migrations')

manager = migration_manager.MigrationManager(testdata_filename)

migrations = manager.migrations

self.assertEqual(len(migrations), 3)

self.assertEqual(migrations[2].prev_migration_id,

migrations[1].migration_id)

self.assertEqual(migrations[1].prev_migration_id,

migrations[0].migration_id)

def test_generate(self):

testdata_filename = os.path.join(os.path.dirname(__file__),

'migrations')

shutil.rmtree(self.TEST_MIGRATIONS_DIR)

shutil.copytree(testdata_filename, self.TEST_MIGRATIONS_DIR)

os.chmod(self.TEST_MIGRATIONS_DIR,

stat.S_IRWXO | stat.S_IRWXU)

for f in os.listdir(self.TEST_MIGRATIONS_DIR):

file_path = os.path.join(self.TEST_MIGRATIONS_DIR, f)

if not os.path.isdir(file_path):

os.chmod(file_path,

stat.S_IROTH | stat.S_IWOTH | stat.S_IRUSR | stat.S_IWUSR)

manager = migration_manager.MigrationManager(self.TEST_MIGRATIONS_DIR)

path = manager.generate('test migration')

try:

migration_ = manager._migration_from_file(path)

self.assertIsNotNone(migration_.migration_id)

self.assertIsNotNone(migration_.prev_migration_id)

self.assertIsInstance(migration_.upgrade(), update.NoUpdate)

self.assertIsInstance(migration_.downgrade(), update.NoUpdate)

finally:

shutil.rmtree(self.TEST_MIGRATIONS_DIR)

def test_order_migrations(self):

first = migration.Migration('1', None)

second = migration.Migration('2', '1')

third = migration.Migration('3', '2')

migrations = [third, first, second]

expected_order = [first, second, third]

manager = migration_manager.MigrationManager(self.TEST_MIGRATIONS_DIR)

self.assertEqual(manager._order_migrations(migrations), expected_order)

def test_order_migrations_with_no_none(self):

first = migration.Migration('2', '1')

second = migration.Migration('3', '2')

third = migration.Migration('4', '3')

migrations = [third, first, second]

expected_order = [first, second, third]

manager = migration_manager.MigrationManager(self.TEST_MIGRATIONS_DIR)

self.assertEqual(manager._order_migrations(migrations), expected_order)

def test_order_migrations_error_on_unclear_successor(self):

first = migration.Migration('1', None)

second = migration.Migration('2', '1')

third = migration.Migration('3', '1')

migrations = [third, first, second]

manager = migration_manager.MigrationManager(self.TEST_MIGRATIONS_DIR)

with self.assertRaisesRegex(error.SpannerError, 'unclear successor'):

manager._order_migrations(migrations)

def test_order_migrations_error_on_unclear_start_migration(self):

first = migration.Migration('1', None)

second = migration.Migration('3', '2')

migrations = [first, second]

manager = migration_manager.MigrationManager(self.TEST_MIGRATIONS_DIR)

with self.assertRaisesRegex(error.SpannerError, 'no valid previous'):

manager._order_migrations(migrations)

def test_order_migrations_error_on_circular_dependency(self):

first = migration.Migration('1', '3')

second = migration.Migration('2', '1')

third = migration.Migration('3', '2')

migrations = [third, first, second]

manager = migration_manager.MigrationManager(self.TEST_MIGRATIONS_DIR)

with self.assertRaisesRegex(error.SpannerError, 'No valid migration'):

manager._order_migrations(migrations)

def test_order_migrations_error_on_no_successor(self):

first = migration.Migration('1', None)

second = migration.Migration('2', '3')

third = migration.Migration('3', '2')

migrations = [third, first, second]

manager = migration_manager.MigrationManager(self.TEST_MIGRATIONS_DIR)

with self.assertRaisesRegex(error.SpannerError, 'no successor'):

manager._order_migrations(migrations)

def test_filter_migrations(self):

connection = mock.Mock()

executor = migration_executor.MigrationExecutor(

connection, self.TEST_MIGRATIONS_DIR)

first = migration.Migration('1', None)

second = migration.Migration('2', '1')

third = migration.Migration('3', '2')

migrations = [first, second, third]

migrated = {'1': True, '2': False, '3': False}

with mock.patch.object(executor, '_migration_status_map', migrated):

filtered = executor._filter_migrations(migrations, False, None)

self.assertEqual(filtered, [second, third])

filtered = executor._filter_migrations(migrations, False, '2')

self.assertEqual(filtered, [second])

filtered = executor._filter_migrations(reversed(migrations), True, '1')

self.assertEqual(filtered, [first])

def test_filter_migrations_error_on_bad_last_migration(self):

connection = mock.Mock()

executor = migration_executor.MigrationExecutor(

connection, self.TEST_MIGRATIONS_DIR)

first = migration.Migration('1', None)

second = migration.Migration('2', '1')

third = migration.Migration('3', '2')

migrations = [first, second, third]

migrated = {'1': True, '2': False, '3': False}

with mock.patch.object(executor, '_migration_status_map', migrated):

with self.assertRaises(error.SpannerError):

executor._filter_migrations(migrations, False, '1')

with self.assertRaises(error.SpannerError):

executor._filter_migrations(migrations, False, '4')

def test_validate_migrations(self):

connection = mock.Mock()

executor = migration_executor.MigrationExecutor(

connection, self.TEST_MIGRATIONS_DIR)

first = migration.Migration('1', None)

second = migration.Migration('2', '1')

third = migration.Migration('3', '2')

with mock.patch.object(executor, 'migrations') as migrations:

migrations.return_value = [first, second, third]

migrated = {'1': True, '2': False, '3': False}

with mock.patch.object(executor, '_migration_status_map', migrated):

executor._validate_migrations()

migrated = {'1': False, '2': False, '3': False}

with mock.patch.object(executor, '_migration_status_map', migrated):

executor._validate_migrations()

def test_validate_migrations_error_on_unmigrated_after_migrated(self):

connection = mock.Mock()

executor = migration_executor.MigrationExecutor(

connection, self.TEST_MIGRATIONS_DIR)

first = migration.Migration('1', None)

second = migration.Migration('2', '1')

third = migration.Migration('3', '2')

with mock.patch.object(executor, 'migrations') as migrations:

migrations.return_value = [first, second, third]

migrated = {'1': False, '2': True, '3': False}

with mock.patch.object(executor, '_migration_status_map', migrated):

with self.assertRaises(error.SpannerError):

executor._validate_migrations()

migrated = {'1': False, '2': False, '3': True}

with mock.patch.object(executor, '_migration_status_map', migrated):

with self.assertRaises(error.SpannerError):

executor._validate_migrations()

def test_validate_migrations_error_on_unmigrated_first(self):

connection = mock.Mock()

executor = migration_executor.MigrationExecutor(

connection, self.TEST_MIGRATIONS_DIR)

first = migration.Migration('2', '1')

with mock.patch.object(executor, 'migrations') as migrations:

migrations.return_value = [first]

migrated = {'1': False}

with mock.patch.object(executor, '_migration_status_map', migrated):

with self.assertRaises(error.SpannerError):

executor._validate_migrations()

migrated = {}

with mock.patch.object(executor, '_migration_status_map', migrated):

with self.assertRaises(error.SpannerError):

executor._validate_migrations()

def test_migrate(self):

connection = mock.Mock()

executor = migration_executor.MigrationExecutor(

connection, self.TEST_MIGRATIONS_DIR)

first = migration.Migration('1', None)

second = migration.Migration('2', '1')

third = migration.Migration('3', '2')

with mock.patch.object(executor, 'migrations') as migrations:

migrations.return_value = [first, second, third]

migrated = {'1': True, '2': False, '3': False}

with mock.patch.object(executor, '_migration_status_map', migrated):

executor.migrate()

self.assertEqual(migrated, {'1': True, '2': True, '3': True})

def test_rollback(self):

connection = mock.Mock()

executor = migration_executor.MigrationExecutor(

connection, self.TEST_MIGRATIONS_DIR)

first = migration.Migration('1', None)

second = migration.Migration('2', '1')

third = migration.Migration('3', '2')

with mock.patch.object(executor, 'migrations') as migrations:

migrations.return_value = [first, second, third]

migrated = {'1': True, '2': False, '3': False}

with mock.patch.object(executor, '_migration_status_map', migrated):

executor.rollback('1')

self.assertEqual(migrated, {'1': False, '2': False, '3': False})

@classmethod

def tearDownClass(cls):

super().tearDownClass()

shutil.rmtree(MigrationsTest.TEST_DIR)

if __name__ == '__main__':

logging.basicConfig()

unittest.main()

python-spanner-orm/spanner_orm/tests/migrations_test.py at master · NeoTim/python-spanner-orm · GitHub

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