authenticationManager.addChain(chain);

        boolean result = authenticationManager.changePassword("testuser", "newpass");

        assertTrue(result);
        assertEquals(1, chain.changePasswordCallCount);
        assertEquals("testuser", chain.lastChangePasswordUsername);
        assertEquals("newpass", chain.lastChangePasswordPassword);
    }

    // Test changePassword with single chain failure

        }

        // Perform sequential operations
        for (User user : users) {
            chain.update(user);
            chain.changePassword(user.getName(), "newpass" + user.getName());
            chain.load(user);
            if (users.indexOf(user) % 2 == 0) {
                chain.delete(user);
            }
        }

        // Verify all operations were tracked