assertEquals("用户", ldapManager.escapeLDAPSearchFilter("用户"));
        assertEquals("사용자", ldapManager.escapeLDAPSearchFilter("사용자"));
    }

    @Test
    public void test_escapeLDAPSearchFilter_withMixedContent() {
        LdapManager ldapManager = new LdapManager();
        ldapManager.init();

        // Mixed normal and special characters