98 lines
3.6 KiB
Python
98 lines
3.6 KiB
Python
# Copyright (c) 2013 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from migrate.changeset.constraint import UniqueConstraint
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from migrate.changeset.databases import sqlite
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import sqlalchemy as sa
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from openstack.common.db.sqlalchemy import migration
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from openstack.common.db.sqlalchemy import test_base
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def uniques(*constraints):
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"""Make a sequence of UniqueConstraint instances easily comparable
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Convert a sequence of UniqueConstraint instances into a set of
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tuples of form (constraint_name, (constraint_columns)) so that
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assertEqual() will be able to compare sets of unique constraints
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"""
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return set((uc.name, tuple(uc.columns.keys())) for uc in constraints)
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class TestSqliteUniqueConstraints(test_base.DbTestCase):
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def setUp(self):
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super(TestSqliteUniqueConstraints, self).setUp()
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migration.patch_migrate()
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self.helper = sqlite.SQLiteHelper()
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test_table = sa.Table(
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'test_table',
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sa.schema.MetaData(bind=self.engine),
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sa.Column('a', sa.Integer),
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sa.Column('b', sa.String(10)),
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sa.Column('c', sa.Integer),
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sa.UniqueConstraint('a', 'b', name='unique_a_b'),
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sa.UniqueConstraint('b', 'c', name='unique_b_c')
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)
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test_table.create()
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self.addCleanup(test_table.drop)
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# NOTE(rpodolyaka): it's important to use the reflected table here
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# rather than original one because this is what
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# we actually do in db migrations code
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self.reflected_table = sa.Table(
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'test_table',
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sa.schema.MetaData(bind=self.engine),
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autoload=True
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)
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@test_base.backend_specific('sqlite')
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def test_get_unique_constraints(self):
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table = self.reflected_table
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existing = uniques(*self.helper._get_unique_constraints(table))
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should_be = uniques(
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sa.UniqueConstraint(table.c.a, table.c.b, name='unique_a_b'),
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sa.UniqueConstraint(table.c.b, table.c.c, name='unique_b_c'),
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)
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self.assertEqual(should_be, existing)
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@test_base.backend_specific('sqlite')
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def test_add_unique_constraint(self):
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table = self.reflected_table
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UniqueConstraint(table.c.a, table.c.c, name='unique_a_c').create()
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existing = uniques(*self.helper._get_unique_constraints(table))
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should_be = uniques(
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sa.UniqueConstraint(table.c.a, table.c.b, name='unique_a_b'),
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sa.UniqueConstraint(table.c.b, table.c.c, name='unique_b_c'),
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sa.UniqueConstraint(table.c.a, table.c.c, name='unique_a_c'),
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)
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self.assertEqual(should_be, existing)
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@test_base.backend_specific('sqlite')
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def test_drop_unique_constraint(self):
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table = self.reflected_table
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UniqueConstraint(table.c.a, table.c.b, name='unique_a_b').drop()
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existing = uniques(*self.helper._get_unique_constraints(table))
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should_be = uniques(
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sa.UniqueConstraint(table.c.b, table.c.c, name='unique_b_c'),
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)
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self.assertEqual(should_be, existing)
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