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=head1 LICENSE

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

=cut

use strict;
use warnings;

use Test::More  tests => 1 + ($ENV{AUTHOR_TESTING} ? 1 : 0);

my @module_files = (
  'Alien/LibBigWig.pm'
);

my $inc_switch = -d 'blib' ? '-Mblib' : '-Ilib';

use File::Spec;
use IPC::Open3;
use IO::Handle;

open my $stdin, '<', File::Spec->devnull or die "can't open devnull: $!";

my @warnings;
for my $lib (@module_files)
{
    # see L<perlfaq8/How can I capture STDERR from an external command?>
    my $stderr = IO::Handle->new;

    my $pid = open3($stdin, '>&STDERR', $stderr, $^X, $inc_switch, '-e', "require q[$lib]");
    binmode $stderr, ':crlf' if $^O eq 'MSWin32';
    my @_warnings = <$stderr>;
    waitpid($pid, 0);
    is($?, 0, "$lib loaded ok");

    if (@_warnings)
    {
        warn @_warnings;
        push @warnings, @_warnings;
    }
}

is(scalar(@warnings), 0, 'no warnings found') if $ENV{AUTHOR_TESTING};