ldapManager.init();

        // Normal input should not be escaped
        assertEquals("normaluser", ldapManager.escapeLDAPSearchFilter("normaluser"));
        assertEquals("user123", ldapManager.escapeLDAPSearchFilter("user123"));
        assertEquals("user.name", ldapManager.escapeLDAPSearchFilter("user.name"));
    }

    @Test
    public void test_escapeLDAPSearchFilter_withBackslash() {

        User user1 = createTestUser("user1", "User One");
        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("testuser", ldapUser.getName());

        // Test with different names
        LdapUser user2 = new LdapUser(testEnv, "anotheruser");
        assertEquals("anotheruser", user2.getName());

        // Test with empty name
        LdapUser user3 = new LdapUser(testEnv, "");
        assertEquals("", user3.getName());

        // Test with null name
        LdapUser user4 = new LdapUser(testEnv, null);

        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());
    }

        assertEquals("user1", resultList.get(0).get("name"));
    }

    @Test
    public void test_register_collectionPerformanceOptimization() {
        RenderData data = new RenderData();

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