ldapManager.init();

        // Null input should return empty string
        assertEquals("", ldapManager.escapeLDAPSearchFilter(null));
    }

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

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

    @Test