'Test that delete_group return successfully.'

def test_delete_group(self):

    self.driver.do_setup(None)
    ctxt = context.get_admin_context()
    self.driver.create_group(ctxt, GROUP)
    self.driver.create_volume(GROUP_VOLUME)
    (model_update, volumes) = self.driver.delete_group(ctxt, GROUP, [GROUP_VOLUME])
    self.assertEqual(fields.GroupStatus.DELETED, model_update['status'], 'Group    deleted    failed')
    for volume in volumes:
        self.assertEqual('deleted', volume['status'], 'Group    deleted    failed')
