# $Id: 05-NS.t 1362 2015-06-23 08:47:14Z willem $	-*-perl-*-

use strict;

use Test::More tests => 13;

use Net::DNS;

my $name = 'NS.example';

my $type = 'NS';

my $code = 2;

my @attr = qw( nsdname );

my @data = qw( ns.example.com );

my @also = qw( );

my $wire = '026e73076578616d706c6503636f6d00';

{

	my $typecode = unpack 'xn', new Net::DNS::RR(". $type")->encode;

	is( $typecode, $code, "$type RR type code = $code" );

	my $hash = {};

	@{$hash}{@attr} = @data;

	my $rr = new Net::DNS::RR(

		name => $name,

		type => $type,

		%$hash

		);

	my $string = $rr->string;

	my $rr2	   = new Net::DNS::RR($string);

	is( $rr2->string, $string, 'new/string transparent' );

	is( $rr2->encode, $rr->encode, 'new($string) and new(%hash) equivalent' );

	foreach (@attr) {

		is( $rr->$_, $hash->{$_}, "expected result from rr->$_()" );

	}

	foreach (@also) {

		is( $rr2->$_, $rr->$_, "additional attribute rr->$_()" );

	}

	my $null    = new Net::DNS::RR("$name NULL")->encode;

	my $empty   = new Net::DNS::RR("$name $type")->encode;

	my $rxbin   = decode Net::DNS::RR( \$empty )->encode;

	my $txtext  = new Net::DNS::RR("$name $type")->string;

	my $rxtext  = new Net::DNS::RR($txtext)->encode;

	my $encoded = $rr->encode;

	my $decoded = decode Net::DNS::RR( \$encoded );

	my $hex1    = unpack 'H*', $encoded;

	my $hex2    = unpack 'H*', $decoded->encode;

	my $hex3    = unpack 'H*', substr( $encoded, length $null );

	is( $hex2,	     $hex1,	    'encode/decode transparent' );

	is( $hex3,	     $wire,	    'encoded RDATA matches example' );

	is( length($empty),  length($null), 'encoded RDATA can be empty' );

	is( length($rxbin),  length($null), 'decoded RDATA can be empty' );

	is( length($rxtext), length($null), 'string RDATA can be empty' );

}

{

	my $lc		= new Net::DNS::RR( lc ". $type @data" );

	my $rr		= new Net::DNS::RR( uc ". $type @data" );

	my $hash	= {};

	my $predecessor = $rr->encode( 0, $hash );

	my $compressed	= $rr->encode( length $predecessor, $hash );

	ok( length $compressed < length $predecessor, 'encoded RDATA compressible' );

	isnt( $rr->encode, $lc->encode, 'encoded RDATA names not downcased' );

	is( $rr->canonical, $lc->encode, 'canonical RDATA names downcased' );

}

{

	my $rr = new Net::DNS::RR(". $type");

	foreach (@attr) {

		ok( !$rr->$_(), "'$_' attribute of empty RR undefined" );

	}

}

exit;