def METHOD_NAME(test_case):
    m = DummyModule()
    test_case.assertEqual(m.dummy_buf.device, cpu0_device)
    test_case.assertEqual(m.dummy_para.device, cpu0_device)
    input = flow.Tensor(in_val)
    output = m(input)
    test_case.assertTrue(np.allclose(output.numpy(), -dummy_val, 0.0001, 0.0001))
    test_case.assertEqual(m.dummy_buf.grad, None)
    test_case.assertEqual(m.dummy_para.grad, None)
    test_case.assertEqual(input.device, cpu0_device)
    test_case.assertEqual(output.device, cpu0_device)