User user2 = createTestUser("user2", "User Two");
        User user3 = createTestUser("user3", "User Three");

        chain.update(user1);
        chain.update(user2);
        chain.update(user3);

        assertEquals(3, chain.updateCalls.size());
        assertEquals(user1, chain.updateCalls.get(0));
        assertEquals(user2, chain.updateCalls.get(1));

        FessUserNotFoundException exception2 = new FessUserNotFoundException("user2");

        assertNotSame(exception1, exception2);
        assertFalse(exception1.getMessage().equals(exception2.getMessage()));
        assertEquals("User is not found: user1", exception1.getMessage());
        assertEquals("User is not found: user2", exception2.getMessage());
    }

        RenderData data = new RenderData();

        BsUser entity1 = new BsUser();
        entity1.setName("user1");
        BsUser entity2 = new BsUser();
        entity2.setName("user2");

        // Test List interface (should use get(0) for performance)
        List<BsUser> list = Arrays.asList(entity1, entity2);
        RenderDataUtil.register(data, "list", list);