Add a quick utility to test datetime formatting

tests/Makefile.am

@@ -63,7 +63,8 @@ noinst_PROGRAMS = $(TEST_PROGS)	\
 	unicode-collate 	\
 	$(timeloop) 		\
 	errorcheck-mutex-test	\
-	assert-msg-test
+	assert-msg-test		\
+	datetime
 
 TEST_PROGS		+= testglib
 testglib_SOURCES         = testglib.c
@@ -80,6 +81,7 @@ if ENABLE_TIMELOOP
 timeloop_LDADD = $(libglib)
 timeloop_closure_LDADD = $(libglib) $(libgobject)
 endif
+datetime_LDADD = $(libglib)
 
 test_programs =					\
 	atomic-test				\

tests/datetime.c

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of the
+ * licence, or (at your option) any later version.
+ *
+ * This 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 Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
+ * USA.
+ */
+
+#include <locale.h>
+#include <glib/glib.h>
+
+int
+main (int argc, char *argv[])
+{
+  gchar *fmt;
+  GDateTime *dt;
+  gchar *str;
+
+  setlocale (LC_ALL, "");
+
+  if (argc > 1)
+    fmt = argv[1];
+  else
+    fmt = "%x %X";
+
+  dt = g_date_time_new_now_local ();
+  str = g_date_time_format (dt, fmt);
+  g_print ("%s\n", str);
+  g_free (str);
+
+  return 0;
+}