usage.t

source of perl for linux application,

#!perl
use strict;
BEGIN {
	chdir 't' if -d 't';
	@INC = '../lib';
}

use File::Basename;
use File::Spec;
use Test::More;
plan tests => 8;

use_ok( 'Pod::Usage' );

# Test verbose level 0
my $vbl_0 = << 'EOMSG';
Usage:
    The SYNOPSIS section is displayed with -verbose >= 0.

EOMSG
my $fake_out = tie *FAKEOUT, 'CatchOut';
pod2usage({ -verbose => 0, -exit => 'noexit', -output => \*FAKEOUT });
is( $$fake_out, $vbl_0, 'Verbose level 0' );

my $msg = "Prefix message for pod2usage()";
$$fake_out = '';
pod2usage({ -verbose => 0, -exit => 'noexit', -output => \*FAKEOUT,
            -message => $msg });
is( $$fake_out, "$msg\n$vbl_0", '-message parameter' );

SKIP: {
    my( $file, $path ) = fileparse( $0 );
    skip( 'File in current directory', 2 ) if -e $file; 
    $$fake_out = '';
    eval {
        pod2usage({ -verbose => 0, -exit => 'noexit', 
                    -output => \*FAKEOUT, -input => $file });
    };
    like( $@, qr/^Can't open $file/, 
          'File not found without -pathlist' );

    eval {
        pod2usage({ -verbose => 0, -exit => 'noexit',
                    -output => \*FAKEOUT, -input => $file, 
                    -pathlist => $path });
    };
    is( $$fake_out, $vbl_0, '-pathlist parameter' );
}

SKIP: { # Test exit status from pod2usage()
    skip "Exit status broken on Mac OS", 1 if $^O eq 'MacOS';
    my $exit = ($^O eq 'VMS' ? 2 : 42);
    my $dev_null = File::Spec->devnull;
    my $args = join ", ", (
        "-verbose => 0", 
        "-exit    => $exit",
        "-output  => q{$dev_null}",
        "-input   => q{$0}",
    );
    my $cq = (($^O eq 'MSWin32'
               || $^O eq 'NetWare'
               || $^O eq 'VMS') ? '"'
              : "");
    my @params = ( "${cq}-I../lib$cq",  "${cq}-MPod::Usage$cq", '-e' );
    my $prg = qq[${cq}pod2usage({ $args })$cq];
    my @cmd = ( $^X, @params, $prg );

    print "# cmd = @cmd\n";

    is( system( @cmd ) >> 8, $exit, 'Exit status of pod2usage()' );
}

# Test verbose level 1
my $vbl_1 = << 'EOMSG';
Usage:
    The SYNOPSIS section is displayed with -verbose >= 0.

Options:
    The OPTIONS section is displayed with -verbose >= 1.

Arguments:
    The ARGUMENTS section is displayed with -verbose >= 1.

EOMSG
$$fake_out = '';
pod2usage( { -verbose => 1, -exit => 'noexit', -output => \*FAKEOUT } );
is( $$fake_out, $vbl_1, 'Verbose level 1' );

# Test verbose level 2
$$fake_out = '';
require Pod::Text; # Pod::Usage->isa( 'Pod::Text' )

( my $p2tp = new Pod::Text )->parse_from_file( $0, \*FAKEOUT );
my $pod2text = $$fake_out;

$$fake_out = '';
pod2usage( { -verbose => 2, -exit => 'noexit', -output => \*FAKEOUT } );
my $pod2usage = $$fake_out;

is( $pod2usage, $pod2text, 'Verbose level >= 2 eq pod2text' );


package CatchOut;
sub TIEHANDLE { bless \( my $self ), shift }
sub PRINT     { my $self = shift; $$self .= $_[0] }

__END__

=head1 NAME

Usage.t - Tests for Pod::Usage

=head1 SYNOPSIS

The B<SYNOPSIS> section is displayed with -verbose >= 0.

=head1 DESCRIPTION

Testing Pod::Usage. This section is not displayed with -verbose < 2.

=head1 OPTIONS

The B<OPTIONS> section is displayed with -verbose >= 1.

=head1 ARGUMENTS

The B<ARGUMENTS> section is displayed with -verbose >= 1.

=head1 AUTHOR

20020105 Abe Timmerman <[e-mail]>

=cut