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        skip "$e: !perlio_ok", 4 unless (perlio_ok($e) or $DEBUG);
        no warnings 'uninitialized';
        open $fh, ">:encoding($e)", $pfile or die "$sfile : $!";
        $fh->autoflush(0);
        print $fh $utext;
        close $fh;
        $seq++;
        is(compare_text($sfile, $pfile), 0 => ">:encoding($e)");
        if ($DEBUG){
        copy $sfile, "$sfile.$seq";
        copy $pfile, "$pfile.$seq";
        }
        
        # this time print line by line.
        # works even for ISO-2022 but not ISO-2022-KR
        open $fh, ">:encoding($e)", $pfile or die "$sfile : $!";
        $fh->autoflush(1);
        for my $l (@uline) {
        print $fh $l;
        }
        close $fh;
        $seq++;
        is(compare_text($sfile, $pfile), 0 => ">:encoding($e) by lines");
        if ($DEBUG){
        copy $sfile, "$sfile.$seq";
        copy $pfile, "$pfile.$seq";
        }
        my $dtext;
        open $fh, "<:encoding($e)", $pfile or die "$pfile : $!";
        $fh->autoflush(0);
        $dtext = join('' => <$fh>);
        close $fh;
        $seq++;
        ok($utext eq $dtext, "<:encoding($e)");
        if ($DEBUG){
        dump2file("$sfile.$seq", $utext);
        dump2file("$pfile.$seq", $dtext);
        }
        if (perlio_ok($e) or $DEBUG){
        $dtext = '';
        open $fh, "<:encoding($e)", $pfile or die "$pfile : $!";
        while(defined(my $l = <$fh>)) {
            $dtext .= $l;
        }
        close $fh;
        }
        $seq++;
        ok($utext eq $dtext,  "<:encoding($e) by lines");
        if ($DEBUG){
        dump2file("$sfile.$seq", $utext);
        dump2file("$pfile.$seq", $dtext);
        }
    }
     if ( ! $DEBUG ) {
            1 while unlink ($sfile);
            1 while unlink ($pfile);
        }
    }
}

# BOM Test

SKIP:{
    my $pev = PerlIO::encoding->VERSION;
    skip "PerlIO::encoding->VERSION = $pev <= 0.07 ", 6
    unless ($pev >= 0.07 or $DEBUG);

    my $file = File::Spec->catfile($dir,"jisx0208.utf");
    open my $fh, "<:utf8", $file or die "$file : $!";
    my $str = join('' => <$fh>);
    close $fh;
    my %bom = (
           'UTF-16BE' => pack('n', 0xFeFF),
           'UTF-16LE' => pack('v', 0xFeFF),
           'UTF-32BE' => pack('N', 0xFeFF),
           'UTF-32LE' => pack('V', 0xFeFF),
          );
    # reading
    for my $utf (sort keys %bom){
    my $bomed = $bom{$utf} . encode($utf, $str);
    my $sfile = File::Spec->catfile($dir,".${utf}_${seq}_$$");
    dump2file($sfile, $bomed);
    my $utf_nobom = $utf; $utf_nobom =~ s/(LE|BE)$//o;
    # reading
    open $fh, "<:encoding($utf_nobom)", $sfile or die "$sfile : $!";
    my $cmp = join '' => <$fh>;
    close $fh;
    is($str, $cmp, "<:encoding($utf_nobom) eq $utf");
    unlink $sfile;  $seq++;
    }
    # writing
    for my $utf_nobom (qw/UTF-16 UTF-32/){
    my $utf = $utf_nobom . 'BE';
    my $sfile = File::Spec->catfile($dir,".${utf_nobom}_${seq}_$$");
    my $bomed = $bom{$utf} . encode($utf, $str);
    open  $fh, ">:encoding($utf_nobom)", $sfile or die "$sfile : $!";
    print $fh $str;
    close $fh;
    open my $fh, "<:bytes", $sfile or die "$sfile : $!";
    read $fh, my $cmp, -s $sfile;
    close $fh;
    use bytes ();
    ok($bomed eq $cmp, ">:encoding($utf_nobom) eq $utf");
    unlink $sfile; $seq++;
    }
}
sub dump2file{
    no warnings;
    open my $fh, ">", $_[0] or die "$_[0]: $!";
    binmode $fh;
    print $fh $_[1];
    close $fh;
}