BEGIN {

    if ($ENV{PERL_CORE}) {

	chdir 't' if -d 't';

	@INC = ("../lib", "lib/compress");

    }

}

use lib qw(t t/compress);

use strict;

use warnings;

use Test::More ;

use CompTestUtils;

BEGIN 

{ 

    # use Test::NoWarnings, if available

    my $extra = 0 ;

    $extra = 1

        if eval { require Test::NoWarnings ;  import Test::NoWarnings; 1 };

    plan tests => 38 + $extra ;

    use_ok('Compress::Raw::Zlib', 2) ;

}

my $hello = <

hello world

this is a test

EOM

my $len   = length $hello ;

# Check zlib_version and ZLIB_VERSION are the same.

SKIP: {

    skip "TEST_SKIP_VERSION_CHECK is set", 1 

        if $ENV{TEST_SKIP_VERSION_CHECK};

    is Compress::Raw::Zlib::zlib_version, ZLIB_VERSION,

        "ZLIB_VERSION matches Compress::Raw::Zlib::zlib_version" ;

}

{

    title 'non-PV dictionary';

    # ==============================

    my $dictionary = *hello ;

    ok my $x = new Compress::Raw::Zlib::Deflate({-Level => Z_BEST_COMPRESSION,

			     -Dictionary => $dictionary}) ;

    my $dictID = $x->dict_adler() ;

    my ($X, $Y, $Z);

    cmp_ok $x->deflate($hello, $X), '==', Z_OK;

    cmp_ok $x->flush($Y), '==', Z_OK;

    $X .= $Y ;

    ok my $k = new Compress::Raw::Zlib::Inflate(-Dictionary => $dictionary) ;

    cmp_ok $k->inflate($X, $Z), '==', Z_STREAM_END;

    is $k->dict_adler(), $dictID;

    is $hello, $Z ;

}

{

    title  "deflate/inflate - non-PV buffers";

    # ==============================

    my $hello = *hello ;

    my ($err, $x, $X, $status); 

    ok( ($x, $err) = new Compress::Raw::Zlib::Deflate, "Create deflate object" );

    ok $x, "Compress::Raw::Zlib::Deflate ok" ;

    cmp_ok $err, '==', Z_OK, "status is Z_OK" ;

    ok ! defined $x->msg() ;

    is $x->total_in(), 0, "total_in() == 0" ;

    is $x->total_out(), 0, "total_out() == 0" ;

    $X = *X;

    my $Answer = '';

    $status = $x->deflate($hello, $X) ;

    $Answer .= $X ;

    cmp_ok $status, '==', Z_OK, "deflate returned Z_OK" ;

    $X = *X;

    cmp_ok  $x->flush($X), '==', Z_OK, "flush returned Z_OK" ;

    $Answer .= $X ;

    ok ! defined $x->msg()  ;

    is $x->total_in(), length $hello, "total_in ok" ;

    is $x->total_out(), length $Answer, "total_out ok" ;

    my $k;

    ok(($k, $err) = new Compress::Raw::Zlib::Inflate);

    ok $k, "Compress::Raw::Zlib::Inflate ok" ;

    cmp_ok $err, '==', Z_OK, "status is Z_OK" ;

    ok ! defined $k->msg(), "No error messages" ;

    is $k->total_in(), 0, "total_in() == 0" ;

    is $k->total_out(), 0, "total_out() == 0" ;

    my $GOT = '';

    my $Z;

    $Z = *Z;

    my $Alen = length $Answer;

    $status = $k->inflate($Answer, $Z) ;

    $GOT .= $Z ;

    cmp_ok $status, '==', Z_STREAM_END, "Got Z_STREAM_END" ;

    is $GOT, $hello, "uncompressed data matches ok" ;

    ok ! defined $k->msg(), "No error messages" ;

    is $k->total_in(), $Alen, "total_in ok" ;

    is $k->total_out(), length $hello , "total_out ok";

    ok(($k, $err) = new Compress::Raw::Zlib::Inflate);

    ok $k, "Compress::Raw::Zlib::Inflate ok" ;

    cmp_ok $err, '==', Z_OK, "status is Z_OK" ;

    $Z = *Z;

    $status = $k->inflate($hello, $Z);

    is $Z, "", 'inflating *hello does not crash';

    $hello = *hello;

    $status = $k->inflateSync($hello);

    cmp_ok $status, "!=", Z_OK,

       "inflateSync on *hello returns error (and does not crash)";

}