def test_migrate_with_dry_run_flag(self, mock_file_config, initialize, mocked_apply_migration,
getLogger):
"""
Test that when a dry run is performed, no migrations actually occur.
"""
logger = MagicMock()
getLogger.return_value = logger
# Make sure we start out with a clean slate
self.assertEquals(MigrationTracker.objects().count(), 0)
# Make sure that our mock works. There are three valid packages.
self.assertEquals(len(models.get_migration_packages()), 4)
# Set all versions back to 0
for package in models.get_migration_packages():
package._migration_tracker.version = 0
package._migration_tracker.save()
result = manage.main()
# Test that none of the mock objects were actually called
migration_modules_called = [
mock_call[1][1].name for mock_call in mocked_apply_migration.mock_calls]
self.assertEquals(0, len(migration_modules_called))
self.assertEquals(1, result)
for package in models.get_migration_packages():
self.assertEqual(package.current_version, 0)
initialize.assert_called_once_with(max_timeout=1)
def test_current_version_too_high(self, mocked_file_config, initialize, getLogger):
"""
Set the current package version higher than latest available version, then sit back and eat
popcorn.
"""
logger = MagicMock()
getLogger.return_value = logger
# Make sure we start out with a clean slate
self.assertEquals(MigrationTracker.objects().count(), 0)
# Make sure that our mock works. There are four valid packages.
self.assertEquals(len(models.get_migration_packages()), 4)
# Set all versions to ridiculously high values
for package in models.get_migration_packages():
package._migration_tracker.version = 9999999
package._migration_tracker.save()
error_code = manage.main()
self.assertEqual(error_code, os.EX_DATAERR)
# There should have been a critical log about the Exception
expected_messages = (
'The database for migration package unit.server.db.migration_packages.'
'platform is at version 9999999, which is larger than the latest version available, 1.')
critical_messages = ''.join([mock_call[1][0] for mock_call in logger.critical.mock_calls])
for msg in expected_messages:
self.assertTrue(msg in critical_messages)
initialize.assert_called_once_with(max_timeout=1)
def test_current_version_too_high(self, mocked_file_config, initialize, getLogger):
"""
Set the current package version higher than latest available version, then sit back and eat
popcorn.
"""
logger = MagicMock()
getLogger.return_value = logger
# Make sure we start out with a clean slate
self.assertEquals(MigrationTracker.objects().count(), 0)
# Make sure that our mock works and sees the right number of packages
self.assertEquals(len(models.get_migration_packages()), 5)
# Set all versions to ridiculously high values
for package in models.get_migration_packages():
package._migration_tracker.version = 9999999
package._migration_tracker.save()
error_code = manage.main()
self.assertEqual(error_code, os.EX_DATAERR)
# There should have been a critical log about the Exception
expected_messages = (
'The database for migration package unit.server.db.migration_packages.'
'platform is at version 9999999, which is larger than the latest version available, 1.')
critical_messages = ''.join([mock_call[1][0] for mock_call in logger.critical.mock_calls])
for msg in expected_messages:
self.assertTrue(msg in critical_messages)
initialize.assert_called_once_with(max_timeout=1)
def test_migrate_with_new_packages(self, initialize, start_logging_mock,
logger_mock, mocked_stdout,
mocked_stderr):
"""
Adding new packages to a system that doesn't have any trackers should advance
each package to the latest available version, applying all migrate() functions along the
way.
"""
# Make sure we start out with a clean slate
self.assertEquals(MigrationTracker.objects().count(), 0)
# Make sure that our mock works. There are four valid packages.
self.assertEquals(len(models.get_migration_packages()), 4)
manage.main()
for package in models.get_migration_packages():
if 'raise_exception' in str(package):
# The Exception raising package should get to version 1, because version 2 raises
self.assertEqual(package.current_version, 1)
elif 'z' in str(package):
self.assertEquals(package.current_version, 0)
else:
# All other packages should reach their top versions
self.assertEqual(package.current_version,
package.latest_available_version)
initialize.assert_called_once_with(max_timeout=1)
def test_migrate_with_dry_run_flag(self, mock_file_config, initialize,
mocked_apply_migration, getLogger):
"""
Test that when a dry run is performed, no migrations actually occur.
"""
logger = MagicMock()
getLogger.return_value = logger
# Make sure we start out with a clean slate
self.assertEquals(MigrationTracker.objects().count(), 0)
# Make sure that our mock works. There are three valid packages.
self.assertEquals(len(models.get_migration_packages()), 4)
# Set all versions back to 0
for package in models.get_migration_packages():
package._migration_tracker.version = 0
package._migration_tracker.save()
result = manage.main()
# Test that none of the mock objects were actually called
migration_modules_called = [
mock_call[1][1].name
for mock_call in mocked_apply_migration.mock_calls
]
self.assertEquals(0, len(migration_modules_called))
self.assertEquals(1, result)
for package in models.get_migration_packages():
self.assertEqual(package.current_version, 0)
initialize.assert_called_once_with(max_timeout=1)
def test_migrate(self, mock_file_config, initialize,
mocked_apply_migration, getLogger):
"""
Let's set all the packages to be at version 0, and then check that the migrations get
called in the correct order.
"""
logger = MagicMock()
getLogger.return_value = logger
# Make sure we start out with a clean slate
self.assertEquals(MigrationTracker.objects().count(), 0)
# Make sure that our mock works. There are three valid packages.
self.assertEquals(len(models.get_migration_packages()), 4)
# Set all versions back to 0
for package in models.get_migration_packages():
package._migration_tracker.version = 0
package._migration_tracker.save()
manage.main()
# There should have been a critical log about the Exception
expected_messages = (
'Applying migration '
'unit.server.db.migration_packages.raise_exception.0002_oh_no failed.\n\n'
'Halting migrations due to a migration failure.',
"Bet you didn\'t see this coming.")
critical_messages = ''.join(
[mock_call[1][0] for mock_call in logger.critical.mock_calls])
for msg in expected_messages:
self.assertTrue(msg in critical_messages)
migration_modules_called = [
mock_call[1][1].name
for mock_call in mocked_apply_migration.mock_calls
]
# Note that none of the migrations that don't meet our criteria show up in this list. Also,
# Note that migration_packages.raise_exception.0003_shouldnt_run doesn't appear
# since migration_packages.raise_exception.0002_oh_no raised an Exception. Note
# also that even though the raise_exception package raised an Exception, we still run all
# the z migrations because we don't want one package to break another.
expected_migration_modules_called = [
'unit.server.db.migration_packages.platform.0001_stuff_and_junk',
'unit.server.db.migration_packages.raise_exception.0001_works_fine',
'unit.server.db.migration_packages.raise_exception.0002_oh_no'
]
self.assertEquals(migration_modules_called,
expected_migration_modules_called)
# Assert that our precious versions have been updated correctly
for package in models.get_migration_packages():
if package.name == 'unit.server.db.migration_packages.platform':
self.assertEqual(package.current_version,
package.latest_available_version)
elif package.name == 'unit.server.db.migration_packages.raise_exception':
# The raised Exception should have prevented us from getting past version 1
self.assertEquals(package.current_version, 1)
else:
# raise_exception should cause the migrations to stop
self.assertEqual(package.current_version, 0)
initialize.assert_called_once_with(max_timeout=1)
def __init__(self, python_package):
"""
Initialize the MigrationPackage to represent the Python migration package passed in.
:param python_package: The Python package this object should represent
:type python_package: package
"""
self._package = python_package
self.allow_fast_forward = getattr(python_package, 'allow_fast_forward',
False)
self.duration = None
try:
self._migration_tracker = MigrationTracker.objects().get(
name=self.name)
except DoesNotExist:
self._migration_tracker = MigrationTracker(name=self.name)
self._migration_tracker.save()
# Calculate the latest available version
available_versions = self.available_versions
if available_versions:
self.latest_available_version = available_versions[-1]
else:
self.latest_available_version = 0
def test_migrate(self, mock_file_config, initialize, mocked_apply_migration, getLogger):
"""
Let's set all the packages to be at version 0, and then check that the migrations get
called in the correct order.
"""
logger = MagicMock()
getLogger.return_value = logger
# Make sure we start out with a clean slate
self.assertEquals(MigrationTracker.objects().count(), 0)
# Make sure that our mock works. There are three valid packages.
self.assertEquals(len(models.get_migration_packages()), 4)
# Set all versions back to 0
for package in models.get_migration_packages():
package._migration_tracker.version = 0
package._migration_tracker.save()
manage.main()
# There should have been a critical log about the Exception
expected_messages = (
'Applying migration '
'unit.server.db.migration_packages.raise_exception.0002_oh_no failed.\n\n'
'Halting migrations due to a migration failure.',
"Bet you didn\'t see this coming."
)
critical_messages = ''.join([mock_call[1][0] for mock_call in logger.critical.mock_calls])
for msg in expected_messages:
self.assertTrue(msg in critical_messages)
migration_modules_called = [
mock_call[1][1].name for mock_call in mocked_apply_migration.mock_calls]
# Note that none of the migrations that don't meet our criteria show up in this list. Also,
# Note that migration_packages.raise_exception.0003_shouldnt_run doesn't appear
# since migration_packages.raise_exception.0002_oh_no raised an Exception. Note
# also that even though the raise_exception package raised an Exception, we still run all
# the z migrations because we don't want one package to break another.
expected_migration_modules_called = [
'unit.server.db.migration_packages.platform.0001_stuff_and_junk',
'unit.server.db.migration_packages.raise_exception.0001_works_fine',
'unit.server.db.migration_packages.raise_exception.0002_oh_no']
self.assertEquals(migration_modules_called, expected_migration_modules_called)
# Assert that our precious versions have been updated correctly
for package in models.get_migration_packages():
if package.name == 'unit.server.db.migration_packages.platform':
self.assertEqual(package.current_version, package.latest_available_version)
elif package.name == 'unit.server.db.migration_packages.raise_exception':
# The raised Exception should have prevented us from getting past version 1
self.assertEquals(package.current_version, 1)
else:
# raise_exception should cause the migrations to stop
self.assertEqual(package.current_version, 0)
initialize.assert_called_once_with(max_timeout=1)
def __init__(self, python_package):
"""
Initialize the MigrationPackage to represent the Python migration package passed in.
:param python_package: The Python package this object should represent
:type python_package: package
"""
self._package = python_package
self.allow_fast_forward = getattr(python_package, 'allow_fast_forward', False)
try:
self._migration_tracker = MigrationTracker.objects().get(name=self.name)
except DoesNotExist:
self._migration_tracker = MigrationTracker(name=self.name)
self._migration_tracker.save()
# Calculate the latest available version
available_versions = self.available_versions
if available_versions:
self.latest_available_version = available_versions[-1]
else:
self.latest_available_version = 0
def test_migrate_with_new_packages(self, initialize, start_logging_mock, logger_mock,
mocked_stdout, mocked_stderr):
"""
Adding new packages to a system that doesn't have any trackers should advance
each package to the latest available version, applying no migrate() functions along the
way.
"""
# Make sure we start out with a clean slate
self.assertEquals(MigrationTracker.objects().count(), 0)
# Make sure that our mock works. There are five valid packages.
self.assertEquals(len(models.get_migration_packages()), 5)
manage.main()
for package in models.get_migration_packages():
if 'raise_exception' in str(package):
# The Exception raising package should get to version 3, despite the fact that
# version 2 raises an exception, because new trackers get fast-forwarded.
self.assertEqual(package.current_version, 3)
else:
# All other packages should reach their top versions
self.assertEqual(package.current_version, package.latest_available_version)
initialize.assert_called_once_with(max_timeout=1)
def __init__(self, python_package):
"""
Initialize the MigrationPackage to represent the Python migration package passed in.
:param python_package: The Python package this object should represent
:type python_package: package
"""
self._package = python_package
# This is an object representation of the DB object that keeps track of the migration
# version that has been applied
try:
self._migration_tracker = MigrationTracker.objects().get(name=self.name)
except DoesNotExist:
self._migration_tracker = MigrationTracker(name=self.name)
self._migration_tracker.save()
# Calculate the latest available version
available_versions = self.available_versions
if available_versions:
self.latest_available_version = available_versions[-1]
else:
self.latest_available_version = 0
def __init__(self, python_package):
"""
Initialize the MigrationPackage to represent the Python migration package passed in.
:param python_package: The Python package this object should represent
:type python_package: package
"""
self._package = python_package
# This is an object representation of the DB object that keeps track of the migration
# version that has been applied
try:
self._migration_tracker = MigrationTracker.objects().get(name=self.name)
except DoesNotExist:
self._migration_tracker = MigrationTracker(name=self.name)
self._migration_tracker.save()
# Calculate the latest available version
available_versions = self.available_versions
if available_versions:
self.latest_available_version = available_versions[-1]
else:
self.latest_available_version = 0
def clean(self):
super(MigrationTest, self).clean()
# Make sure each test doesn't have any lingering MigrationTrackers
MigrationTracker.objects().delete()
