def _check_265(self, engine, data):
        # Assert that only one index exists that covers columns
        # host and deleted
        instances = oslodbutils.get_table(engine, 'instances')
        self.assertEqual(1, len([i for i in instances.indexes
                                 if [c.name for c in i.columns][:2] ==
                                    ['host', 'deleted']]))
        # and only one index covers host column
        iscsi_targets = oslodbutils.get_table(engine, 'iscsi_targets')
        self.assertEqual(1, len([i for i in iscsi_targets.indexes
                                 if [c.name for c in i.columns][:1] ==
                                    ['host']]))
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/tests/unit/db/test_migrations.py/NovaMigrationsCheckers._check_265/original