class DbApiTestCase(test.TestCase):
    def setUp(self):
        super(DbApiTestCase, self).setUp()
        self.user_id = 'fake'
        self.project_id = 'fake'
        self.context = context.RequestContext(self.user_id, self.project_id)

    def test_virtual_interface_create(self):
        ctxt = self.context
        instance_ref = db.instance_create(ctxt, {})
        vif = {'address': '56:12:12:12:12:12',
               'instance_uuid': instance_ref['uuid'],
              }

        db.virtual_interface_create(ctxt, vif)
        db.virtual_interface_create(ctxt, vif)
        for vif in db.virtual_interface_get_all(ctxt):
                self.assertEquals(2,vif['address'])