[mutter] tests/actor-pick: Allocate actor before picking

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 7f488e3e1d13f54ff1bbc9b43ee64cd2dfa82905
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Mar 31 19:01:53 2020 -0300

    tests/actor-pick: Allocate actor before picking
    
    Picking now only happens on allocated actors, but the
    callback in the actor-pick test is not waiting for the
    stage to run an allocation cycle. Ideally, we'd wait
    for this cycle, but for now, forcing an allocation works
    as well.
    
    Allocate the overlay actor in the actor-pick test.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1169

 src/tests/clutter/conform/actor-pick.c | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/src/tests/clutter/conform/actor-pick.c b/src/tests/clutter/conform/actor-pick.c
index 53ac8ec5a..dcee96424 100644
--- a/src/tests/clutter/conform/actor-pick.c
+++ b/src/tests/clutter/conform/actor-pick.c
@@ -67,6 +67,9 @@ on_timeout (gpointer data)
         }
       else if (test_num == 2)
         {
+          ClutterActorBox over_actor_box =
+            CLUTTER_ACTOR_BOX_INIT (0, 0, STAGE_WIDTH, STAGE_HEIGHT);
+
           /* Make the actor visible but set a clip so that only some
              of the actors are accessible */
           clutter_actor_show (over_actor);
@@ -76,6 +79,11 @@ on_timeout (gpointer data)
                                   state->actor_width * (ACTORS_X - 4),
                                   state->actor_height * (ACTORS_Y - 4));
 
+          /* Only allocated actors can be picked, so force an allocation
+           * of the overlay actor here.
+           */
+          clutter_actor_allocate (over_actor, &over_actor_box, 0);
+
           if (g_test_verbose ())
             g_print ("Clipped covering actor:\n");
         }