[tracker] tests: Verify that tracker_priority_queue_peek can handle empty queues

[Philip Van Hoof <pvanhoof src gnome org>]

commit 3dcbf4d01eb6409716bc19937076d01ce5e19655
Author: Jonatan Pålsson <jonatan palsson pelagicore com>
Date:   Thu Sep 12 10:28:08 2013 +0200

    tests: Verify that tracker_priority_queue_peek can handle empty queues

 .../libtracker-miner/tracker-priority-queue-test.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/tests/libtracker-miner/tracker-priority-queue-test.c 
b/tests/libtracker-miner/tracker-priority-queue-test.c
index e6c38aa..a32d0fb 100644
--- a/tests/libtracker-miner/tracker-priority-queue-test.c
+++ b/tests/libtracker-miner/tracker-priority-queue-test.c
@@ -87,9 +87,12 @@ test_priority_queue_peek (void)
         TrackerPriorityQueue *queue;
         gchar                *result;
         gint                  priority;
-        
+
         queue = tracker_priority_queue_new ();
-        
+
+        result = tracker_priority_queue_peek (queue, &priority);
+        g_assert (result == NULL);
+
         tracker_priority_queue_add (queue, g_strdup ("Low prio"), 10);
         tracker_priority_queue_add (queue, g_strdup ("High prio"), 1);