[easytag] Add a simple undo key test

[David King <davidk src gnome org>]

commit d5ec560efd040fcb065907678a819ec513e51920
Author: David King <amigadave amigadave com>
Date:   Sat Feb 21 16:25:13 2015 +0000

    Add a simple undo key test

 tests/test-misc.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/tests/test-misc.c b/tests/test-misc.c
index a63f953..4a4276a 100644
--- a/tests/test-misc.c
+++ b/tests/test-misc.c
@@ -97,6 +97,16 @@ misc_filename_prepare (void)
     }
 }
 
+static void
+misc_undo_key (void)
+{
+    guint undo_key;
+
+    undo_key = et_undo_key_new ();
+    g_assert_cmpint (undo_key, >, 0U);
+    g_assert_cmpint (undo_key, <, et_undo_key_new ());
+}
+
 int
 main (int argc, char** argv)
 {
@@ -104,6 +114,7 @@ main (int argc, char** argv)
 
     g_test_add_func ("/misc/convert-duration", misc_convert_duration);
     g_test_add_func ("/misc/filename-prepare", misc_filename_prepare);
+    g_test_add_func ("/misc/undo-key", misc_undo_key);
 
     return g_test_run ();
 }