def test_wrapped_volume_implicit(self):
        """max<min, no periodic domain defined"""
        lambda_min = 70
        lambda_max = -150
        vol = volume.PeriodicCVDefinedVolume(op_id,
                                          lambda_min, lambda_max)
        # out of state
        assert_equal(False, vol(lambda_min-1.0))
        assert_equal(False, vol(lambda_max+1.0))
        # in state
        assert_equal(True, vol(lambda_min+1.0))
        assert_equal(True, vol(lambda_max-1.0))
        # border
        assert_equal(True, vol(lambda_min))
        assert_equal(False, vol(lambda_max))