New Column - recur

- Added new column 'recur' for use in custom reports.
- Implemented Table::ascendingPeriod, Table::descendingPeriod allowing
  sorting on the recur column.
- Added unit tests to both use the new column and test the sorting.
- Code cleanup.

src/tests/recur.t

@@ -0,0 +1,67 @@
+#! /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 => 6;
+
+# Create the rc file.
+if (open my $fh, '>', 'recur.rc')
+{
+  print $fh "data.location=.\n",
+            "report.asc.columns=id,recur,description\n",
+            "report.asc.sort=recur+\n",
+            "report.desc.columns=id,recur,description\n",
+            "report.desc.sort=recur-\n";
+  close $fh;
+  ok (-r 'recur.rc', 'Created recur.rc');
+}
+
+# Create a few recurring tasks, and test the sort order of the recur column.
+qx{../task rc:recur.rc add due:tomorrow recur:daily  first};
+qx{../task rc:recur.rc add due:tomorrow recur:weekly second};
+qx{../task rc:recur.rc add due:tomorrow recur:3d     third};
+
+my $output = qx{../task rc:recur.rc asc};
+like ($output, qr/first .* third .* second/msx, 'daily 3d weekly');
+
+$output = qx{../task rc:recur.rc desc};
+like ($output, qr/second .* third .* first/msx, 'weekly 3d daily');
+
+# Cleanup.
+unlink 'shadow.txt';
+ok (!-r 'shadow.txt', 'Removed shadow.txt');
+
+unlink 'pending.data';
+ok (!-r 'pending.data', 'Removed pending.data');
+
+unlink 'recur.rc';
+ok (!-r 'recur.rc', 'Removed recur.rc');
+
+exit 0;
+