timer: add some test cases

src/test/timer.c

@@ -55,6 +55,17 @@ int main (void)
     vlc_mutex_init (&data.lock);
     data.count = 0;
 
+    val = vlc_timer_create (&data.timer, callback, &data);
+    assert (val == 0);
+    vlc_timer_destroy (data.timer);
+    assert (data.count == 0);
+
+    val = vlc_timer_create (&data.timer, callback, &data);
+    assert (val == 0);
+    vlc_timer_schedule (data.timer, false, CLOCK_FREQ << 20, CLOCK_FREQ);
+    vlc_timer_destroy (data.timer);
+    assert (data.count == 0);
+
     val = vlc_timer_create (&data.timer, callback, &data);
     assert (val == 0);