Blame t/19-relayering.t

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# Copyright (c) 2009 by David Golden. All rights reserved.
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# Licensed under Apache License, Version 2.0 (the "License").
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# You may not use this file except in compliance with the License.
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# A copy of the License was distributed with this file or you may obtain a
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# copy of the License from http://www.apache.org/licenses/LICENSE-2.0
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use strict;
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use warnings;
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use Test::More;
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use lib 't/lib';
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use Utils qw/next_fd sig_num/;
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use Capture::Tiny ':all';
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unless ( PerlIO->can('get_layers') ) {
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    plan skip_all => "Requires PerlIO::getlayers";
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}
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plan 'no_plan';
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local $ENV{PERL_CAPTURE_TINY_TIMEOUT} = 0; # no timeouts
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my $builder = Test::More->builder;
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binmode( $builder->failure_output, ':utf8' ) if $] >= 5.008;
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my $fd = next_fd;
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my ( $out, $err, $res, @res, %before, %inner, %outer );
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sub _set_layers {
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    my ($fh, $new_layers) = @_;
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    # eliminate pseudo-layers
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    binmode( $fh, ":raw" ) or die "can't binmode $fh";
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    # strip off real layers until only :unix is left
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    while ( 1 < ( my $layers =()= PerlIO::get_layers( $fh, output => 1 ) ) ) {
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        binmode( $fh, ":pop" )  or die "can't binmode $fh";
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    }
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    binmode($fh, $new_layers);
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}
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sub _get_layers {
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    return (
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        stdout => [ PerlIO::get_layers( *STDOUT, output => 1 ) ],
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        stderr => [ PerlIO::get_layers( *STDERR, output => 1 ) ],
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    );
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}
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sub _cmp_layers {
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    local $Test::Builder::Level = $Test::Builder::Level + 1;
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    my ($got, $exp, $label) = @_;
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    ($got, $exp) = map { ":" . join(":", @$_) } $got, $exp;
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    is( $got, $exp, $label );
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}
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#--------------------------------------------------------------------------#
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# relayer should duplicate layers
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#--------------------------------------------------------------------------#
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_set_layers( \*STDOUT, ":unix:encoding(UTF-8):encoding(UTF-8):crlf" );
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_set_layers( \*STDERR, ":unix:encoding(UTF-8):encoding(UTF-8):crlf" );
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%before = _get_layers();
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( $out, $err, @res ) = capture {
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    %inner = _get_layers();
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    print STDOUT "foo\n";
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    print STDERR "bar\n";
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};
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%outer = _get_layers();
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_cmp_layers( $inner{$_}, $before{$_}, "$_: layers inside capture match previous" )
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  for qw/stdout stderr/;
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_cmp_layers( $outer{$_}, $before{$_}, "$_: layers after capture match previous" )
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  for qw/stdout stderr/;
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#--------------------------------------------------------------------------#
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# finish
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#--------------------------------------------------------------------------#
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is( next_fd, $fd, "no file descriptors leaked" );
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exit 0;
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# vim: set ts=4 sts=4 sw=4 et tw=75: