assertNull(ldapManager.getSearchRoleName("no_cn_prefix"));
        assertNull(ldapManager.getSearchRoleName("dn=test"));
    }

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

        // Edge cases
        assertEquals("", ldapManager.replaceWithUnderscores(""));