Unit Tests - en passant + sequence

- Added unit tests to ensure that the "done" command handles both
  sequences and en passant modifications.

src/tests/enpassant.t

@@ -0,0 +1,64 @@
+#! /usr/bin/perl
+################################################################################
+## task - a command line task list manager.
+##
+## Copyright 2006 - 2009, Paul Beckingham.
+## All rights reserved.
+##
+## This program is free software; you can redistribute it and/or modify it under
+## the terms of the GNU General Public License as published by the Free Software
+## Foundation; either version 2 of the License, or (at your option) any later
+## version.
+##
+## This program is distributed in the hope that it will be useful, but WITHOUT
+## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+## FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+## details.
+##
+## You should have received a copy of the GNU General Public License along with
+## this program; if not, write to the
+##
+##     Free Software Foundation, Inc.,
+##     51 Franklin Street, Fifth Floor,
+##     Boston, MA
+##     02110-1301
+##     USA
+##
+################################################################################
+
+use strict;
+use warnings;
+use Test::More tests => 11;
+
+# Create the rc file.
+if (open my $fh, '>', 'enp.rc')
+{
+  print $fh "data.location=.\n";
+  close $fh;
+  ok (-r 'enp.rc', 'Created enp.rc');
+}
+
+# Test the en passant feature.
+qx{../task rc:enp.rc add foo};
+qx{../task rc:enp.rc add foo bar};
+qx{../task rc:enp.rc do 1,2 /foo/FOO/ pri:H +tag};
+my $output = qx{../task rc:enp.rc info 1};
+like ($output, qr/Status\s+Completed/,    'en passant 1 status change');
+like ($output, qr/Description\s+FOO/,     'en passant 1 description change');
+like ($output, qr/Priority\s+H/,          'en passant 1 description change');
+like ($output, qr/Tags\s+tag/,            'en passant 1 description change');
+$output = qx{../task rc:enp.rc info 2};
+like ($output, qr/Status\s+Completed/,    'en passant 2 status change');
+like ($output, qr/Description\s+FOO bar/, 'en passant 2 description change');
+like ($output, qr/Priority\s+H/,          'en passant 2 description change');
+like ($output, qr/Tags\s+tag/,            'en passant 2 description change');
+
+# Cleanup.
+unlink 'pending.data';
+ok (!-r 'pending.data', 'Removed pending.data');
+
+unlink 'enp.rc';
+ok (!-r 'enp.rc', 'Removed enp.rc');
+
+exit 0;
+