LdapConnection con = getClientApiConnection( ldapServer );
ModifyRequest modReq = new ModifyRequest( new DN( DN ) );
modReq.add( "description", "" );
ModifyResponse resp = con.modify( modReq );
assertEquals( ResultCodeEnum.INVALID_ATTRIBUTE_SYNTAX, resp.getLdapResult().getResultCode() );
// Check whether entry is unmodified, i.e. no description
Entry entry = ( ( SearchResultEntry )con.lookup( DN ) ).getEntry();
assertEquals( "description exists?", null, entry.get( "description" ) );