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from alembic.testing.fixtures import TestBase
from alembic.testing import config, eq_, assert_raises, assert_raises_message
from sqlalchemy import Table, MetaData, Column, String
from sqlalchemy.engine.reflection import Inspector
from alembic import migration
from alembic.util import CommandError
version_table = Table('version_table', MetaData(),
Column('version_num', String(32), nullable=False))
def _up(from_, to_, branch_presence_changed=False):
return migration.StampStep(
from_, to_, True, branch_presence_changed
)
def _down(from_, to_, branch_presence_changed=False):
return migration.StampStep(
from_, to_, False, branch_presence_changed
)
class TestMigrationContext(TestBase):
@classmethod
def setup_class(cls):
cls.bind = config.db
def setUp(self):
self.connection = self.bind.connect()
self.transaction = self.connection.begin()
def tearDown(self):
version_table.drop(self.connection, checkfirst=True)
self.transaction.rollback()
self.connection.close()
def make_one(self, **kwargs):
return migration.MigrationContext.configure(**kwargs)
def get_revision(self):
result = self.connection.execute(version_table.select())
rows = result.fetchall()
if len(rows) == 0:
return None
eq_(len(rows), 1)
return rows[0]['version_num']
def test_config_default_version_table_name(self):
context = self.make_one(dialect_name='sqlite')
eq_(context._version.name, 'alembic_version')
def test_config_explicit_version_table_name(self):
context = self.make_one(dialect_name='sqlite',
opts={'version_table': 'explicit'})
eq_(context._version.name, 'explicit')
def test_config_explicit_version_table_schema(self):
context = self.make_one(dialect_name='sqlite',
opts={'version_table_schema': 'explicit'})
eq_(context._version.schema, 'explicit')
def test_get_current_revision_doesnt_create_version_table(self):
context = self.make_one(connection=self.connection,
opts={'version_table': 'version_table'})
eq_(context.get_current_revision(), None)
insp = Inspector(self.connection)
assert ('version_table' not in insp.get_table_names())
def test_get_current_revision(self):
context = self.make_one(connection=self.connection,
opts={'version_table': 'version_table'})
version_table.create(self.connection)
eq_(context.get_current_revision(), None)
self.connection.execute(
version_table.insert().values(version_num='revid'))
eq_(context.get_current_revision(), 'revid')
def test_get_current_revision_error_if_starting_rev_given_online(self):
context = self.make_one(connection=self.connection,
opts={'starting_rev': 'boo'})
assert_raises(
CommandError,
context.get_current_revision
)
def test_get_current_revision_offline(self):
context = self.make_one(dialect_name='sqlite',
opts={'starting_rev': 'startrev',
'as_sql': True})
eq_(context.get_current_revision(), 'startrev')
def test_get_current_revision_multiple_heads(self):
version_table.create(self.connection)
context = self.make_one(connection=self.connection,
opts={'version_table': 'version_table'})
updater = migration.HeadMaintainer(context, ())
updater.update_to_step(_up(None, 'a', True))
updater.update_to_step(_up(None, 'b', True))
assert_raises_message(
CommandError,
"Version table 'version_table' has more than one head present; "
"please use get_current_heads()",
context.get_current_revision
)
def test_get_heads(self):
version_table.create(self.connection)
context = self.make_one(connection=self.connection,
opts={'version_table': 'version_table'})
updater = migration.HeadMaintainer(context, ())
updater.update_to_step(_up(None, 'a', True))
updater.update_to_step(_up(None, 'b', True))
eq_(context.get_current_heads(), ('a', 'b'))
def test_get_heads_offline(self):
version_table.create(self.connection)
context = self.make_one(connection=self.connection,
opts={
'starting_rev': 'q',
'version_table': 'version_table',
'as_sql': True})
eq_(context.get_current_heads(), ('q', ))
class UpdateRevTest(TestBase):
@classmethod
def setup_class(cls):
cls.bind = config.db
def setUp(self):
self.connection = self.bind.connect()
self.context = migration.MigrationContext.configure(
connection=self.connection,
opts={"version_table": "version_table"})
version_table.create(self.connection)
self.updater = migration.HeadMaintainer(self.context, ())
def tearDown(self):
version_table.drop(self.connection, checkfirst=True)
self.connection.close()
def _assert_heads(self, heads):
eq_(self.context.get_current_heads(), heads)
eq_(self.updater.heads, set(heads))
def test_update_none_to_single(self):
self.updater.update_to_step(_up(None, 'a', True))
self._assert_heads(('a',))
def test_update_single_to_single(self):
self.updater.update_to_step(_up(None, 'a', True))
self.updater.update_to_step(_up('a', 'b'))
self._assert_heads(('b',))
def test_update_single_to_none(self):
self.updater.update_to_step(_up(None, 'a', True))
self.updater.update_to_step(_down('a', None, True))
self._assert_heads(())
def test_add_branches(self):
self.updater.update_to_step(_up(None, 'a', True))
self.updater.update_to_step(_up('a', 'b'))
self.updater.update_to_step(_up(None, 'c', True))
self._assert_heads(('b', 'c'))
self.updater.update_to_step(_up('c', 'd'))
self.updater.update_to_step(_up('d', 'e1'))
self.updater.update_to_step(_up('d', 'e2', True))
self._assert_heads(('b', 'e1', 'e2'))
def test_teardown_branches(self):
self.updater.update_to_step(_up(None, 'd1', True))
self.updater.update_to_step(_up(None, 'd2', True))
self._assert_heads(('d1', 'd2'))
self.updater.update_to_step(_down('d1', 'c'))
self._assert_heads(('c', 'd2'))
self.updater.update_to_step(_down('d2', 'c', True))
self._assert_heads(('c',))
self.updater.update_to_step(_down('c', 'b'))
self._assert_heads(('b',))
def test_resolve_merges(self):
self.updater.update_to_step(_up(None, 'a', True))
self.updater.update_to_step(_up('a', 'b'))
self.updater.update_to_step(_up('b', 'c1'))
self.updater.update_to_step(_up('b', 'c2', True))
self.updater.update_to_step(_up('c1', 'd1'))
self.updater.update_to_step(_up('c2', 'd2'))
self._assert_heads(('d1', 'd2'))
self.updater.update_to_step(_up(('d1', 'd2'), 'e'))
self._assert_heads(('e',))
def test_unresolve_merges(self):
self.updater.update_to_step(_up(None, 'e', True))
self.updater.update_to_step(_down('e', ('d1', 'd2')))
self._assert_heads(('d2', 'd1'))
self.updater.update_to_step(_down('d2', 'c2'))
self._assert_heads(('c2', 'd1'))
def test_update_no_match(self):
self.updater.update_to_step(_up(None, 'a', True))
self.updater.heads.add('x')
assert_raises_message(
CommandError,
"Online migration expected to match one row when updating "
"'x' to 'b' in 'version_table'; 0 found",
self.updater.update_to_step, _up('x', 'b')
)
def test_update_multi_match(self):
self.connection.execute(version_table.insert(), version_num='a')
self.connection.execute(version_table.insert(), version_num='a')
self.updater.heads.add('a')
assert_raises_message(
CommandError,
"Online migration expected to match one row when updating "
"'a' to 'b' in 'version_table'; 2 found",
self.updater.update_to_step, _up('a', 'b')
)
def test_delete_no_match(self):
self.updater.update_to_step(_up(None, 'a', True))
self.updater.heads.add('x')
assert_raises_message(
CommandError,
"Online migration expected to match one row when "
"deleting 'x' in 'version_table'; 0 found",
self.updater.update_to_step, _down('x', None, True)
)
def test_delete_multi_match(self):
self.connection.execute(version_table.insert(), version_num='a')
self.connection.execute(version_table.insert(), version_num='a')
self.updater.heads.add('a')
assert_raises_message(
CommandError,
"Online migration expected to match one row when "
"deleting 'a' in 'version_table'; 2 found",
self.updater.update_to_step, _down('a', None, True)
)
|
