// Expected behavior when null chain is processed
            assertTrue(true);
        }
    }

    // Test chains order preservation
    @Test
    public void test_chains_orderPreservation() {
        List<TestAuthenticationChain> chains = new ArrayList<>();
        for (int i = 0; i < 5; i++) {
            TestAuthenticationChain chain = new TestAuthenticationChain();
            chain.id = i;