Code Salvage

- Integrated some code from the (soon to be obsolete) 2.0.0 branch,
  which is general in nature and will be needed.
- And the corresponding unit tests.

src/tests/sensor.t.cpp

@@ -0,0 +1,84 @@
+////////////////////////////////////////////////////////////////////////////////
+// taskwarrior - a command line task list manager.
+//
+// Copyright 2010, Paul Beckingham, Federico Hernandez, Federico Hernandez.
+// 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
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#include <fstream>
+#include <unistd.h>
+#include "Context.h"
+#include "Sensor.h"
+#include "test.h"
+
+Context context;
+
+////////////////////////////////////////////////////////////////////////////////
+int main (int argc, char** argv)
+{
+  UnitTest ut (7);
+
+  // Make sure there is no file.
+  unlink ("./sensor.foo");
+
+  // Create sensor for missing file.
+  Sensor s;
+  s.fileModification ("./sensor.foo");
+  ut.ok (!s.changed (), "file not yet changed");
+
+  // Create the file.
+  std::ofstream one ("./sensor.foo", std::ios_base::out | std::ios_base::app);
+  if (one.good ())
+  {
+    one << "touch" << std::endl;
+    one.close ();
+  }
+
+  // Should register the change, so reset.
+  ut.ok (s.changed (), "file changed");
+  s.reset ();
+  ut.ok (!s.changed (), "file not yet changed");
+
+  // Wait a little, then modify the file.
+  ut.diag ("sleep 2");
+  sleep (2);
+  std::ofstream two ("./sensor.foo", std::ios_base::out | std::ios_base::app);
+  if (two.good ())
+  {
+    two << "touch" << std::endl;
+    two.close ();
+  }
+
+  ut.ok (s.changed (), "file changed");
+  ut.ok (s.changed (), "file still changed");
+  s.reset ();
+  ut.ok (!s.changed (), "file not changed again");
+
+  unlink ("./sensor.foo");
+  ut.ok (s.changed (), "file changed");
+
+  return 0;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+