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 bytes;

use Test::More ;

use CompTestUtils;

BEGIN 

{ 

    plan(skip_all => "lvalue sub tests need Perl ??")

        if $] < 5.006 ; 

    # use Test::NoWarnings, if available

    my $extra = 0 ;

    $extra = 1

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

    plan tests => 10 + $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 'deflate/inflate with lvalue sub';

    my $hello = "I am a HAL 9000 computer" ;

    my $data = $hello ;

    my($X, $Z);

    sub getData : lvalue { $data }

    sub getX    : lvalue { $X }

    sub getZ    : lvalue { $Z }

    ok my $x = new Compress::Raw::Zlib::Deflate ( -AppendOutput => 1 );

    cmp_ok $x->deflate(getData, getX), '==',  Z_OK ;

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

    my $append = "Appended" ;

    $X .= $append ;

    ok my $k = new Compress::Raw::Zlib::Inflate ( -AppendOutput => 1 ) ;

    cmp_ok $k->inflate(getX, getZ), '==', Z_STREAM_END ; ;

    ok $hello eq $Z ;

    is $X, $append;

}