assertEquals(user1, chain2.lastLoadedUser);
        assertEquals(user2, chain3.lastLoadedUser);
    }

    // Test load with null result from chain
    public void test_load_withNullResult() {
        User user = createTestUser("testuser");
        TestAuthenticationChain chain1 = new TestAuthenticationChain();
        TestAuthenticationChain chain2 = new TestAuthenticationChain();