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diff --git a/tests/test-timezone-file.cc b/tests/test-timezone-file.cc
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+
+/*
+ * Copyright 2013 Canonical Ltd.
+ *
+ * Authors:
+ *   Charles Kerr <charles.kerr@canonical.com>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 3, as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranties of
+ * MERCHANTABILITY, SATISFACTORY QUALITY, 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "glib-fixture.h"
+
+#include <datetime/timezone-file.h>
+
+//#include <condition_variable>
+//#include <mutex>
+//#include <queue>
+//#include <string>
+//#include <thread>
+//#include <iostream>
+//#include <istream>
+//#include <fstream>
+
+#include <cstdio> // fopen()
+//#include <sys/stat.h> // chmod()
+#include <unistd.h> // sync()
+
+using unity::indicator::datetime::FileTimezone;
+
+
+/***
+****
+***/
+
+#define TIMEZONE_FILE (SANDBOX"/timezone")
+
+class TimezoneFixture: public GlibFixture
+{
+  private:
+
+    typedef GlibFixture super;
+
+  protected:
+
+    virtual void SetUp ()
+    {
+      super::SetUp ();
+    }
+
+    virtual void TearDown ()
+    {
+      super::TearDown ();
+    }
+
+  public:
+
+    /* convenience func to set the timezone file */
+    void set_file (const std::string& text)
+    {
+      FILE * fp = fopen (TIMEZONE_FILE, "w+");
+      fprintf (fp, "%s\n", text.c_str());
+      fclose (fp);
+      sync ();
+    }
+};
+
+
+/**
+ * Test that timezone-file warns, but doesn't crash, if the timezone file doesn't exist
+ */
+TEST_F (TimezoneFixture, NoFile)
+{
+  remove (TIMEZONE_FILE);
+  ASSERT_FALSE (g_file_test (TIMEZONE_FILE, G_FILE_TEST_EXISTS));
+
+  FileTimezone tz (TIMEZONE_FILE);
+  testLogCount (G_LOG_LEVEL_WARNING, 1);
+}
+
+
+/**
+ * Test that timezone-file picks up the initial value
+ */
+TEST_F (TimezoneFixture, InitialValue)
+{
+  const std::string expected_timezone = "America/Chicago";
+  set_file (expected_timezone);
+  FileTimezone tz (TIMEZONE_FILE);
+  ASSERT_EQ (expected_timezone, tz.timezone.get());
+}
+
+
+/**
+ * Test that clearing the timezone results in an empty string
+ */
+TEST_F (TimezoneFixture, ChangedValue)
+{
+  const std::string initial_timezone = "America/Chicago";
+  const std::string changed_timezone = "America/New_York";
+  set_file (initial_timezone);
+
+  FileTimezone tz (TIMEZONE_FILE);
+  ASSERT_EQ (initial_timezone, tz.timezone.get());
+
+  bool changed = false;
+  auto connection = tz.timezone.changed().connect(
+        [&changed, this](const std::string& s){
+          g_message ("timezone changed to %s", s.c_str());
+          changed = true;
+          g_main_loop_quit (loop);
+        });
+
+  g_idle_add ([](gpointer gself){
+    static_cast<TimezoneFixture*>(gself)->set_file ("America/New_York");
+  //  static_cast<FileTimezone*>(gtz)->timezone.set ("America/New_York");
+    return G_SOURCE_REMOVE;
+  }, this);//&tz);
+
+  g_main_loop_run (loop);
+
+  ASSERT_TRUE (changed);
+  ASSERT_EQ (changed_timezone, tz.timezone.get());
+}