Unit Tests - undo.t

- Added unit tests for the undo command, which verify that a task may
  only be undone if a TDB::gc has not occurred.

src/tests/undo.t

@@ -0,0 +1,74 @@
+#! /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 => 15;
+
+# Create the rc file.
+if (open my $fh, '>', 'undo.rc')
+{
+  print $fh "data.location=.\n";
+  close $fh;
+  ok (-r 'undo.rc', 'Created undo.rc');
+}
+
+# Test the add/do/undo commands.
+my $output = qx{../task rc:undo.rc add one; ../task rc:undo.rc info 1};
+ok (-r 'pending.data', 'pending.data created');
+like ($output, qr/Status\s+Pending\n/, 'Pending');
+
+$output = qx{../task rc:undo.rc do 1; ../task rc:undo.rc info 1};
+ok (! -r 'completed.data', 'completed.data not created');
+like ($output, qr/Status\s+Completed\n/, 'Completed');
+
+$output = qx{../task rc:undo.rc undo 1; ../task rc:undo.rc info 1};
+ok (! -r 'completed.data', 'completed.data not created');
+like ($output, qr/Status\s+Pending\n/, 'Pending');
+
+$output = qx{../task rc:undo.rc do 1; ../task rc:undo.rc list};
+like ($output, qr/^No matches/, 'No matches');
+
+$output = qx{../task rc:undo.rc undo 1; ../task rc:undo.rc info 1};
+like ($output, qr/Task 1 not found/, 'task not found');
+like ($output, qr/reliably undone/, 'can only be reliable undone...');
+
+# Cleanup.
+ok (-r 'pending.data', 'Need to remove pending.data');
+unlink 'pending.data';
+ok (!-r 'pending.data', 'Removed pending.data');
+
+ok (-r 'completed.data', 'Need to remove completed.data');
+unlink 'completed.data';
+ok (!-r 'completed.data', 'Removed completed.data');
+
+unlink 'undo.rc';
+ok (!-r 'undo.rc', 'Removed undo.rc');
+
+exit 0;
+