conform: Check that iterators work post-assignment

It should be possible to copy a ClutterActorIter just by copying its
contents (either via assignment or memcpy).

tests/conform/actor-iter.c

@@ -127,3 +127,80 @@ actor_iter_traverse_remove (TestConformSimpleFixture *fixture G_GNUC_UNUSED,
   g_assert_cmpint (i, ==, n_actors);
   g_assert_cmpint (0, ==, clutter_actor_get_n_children (actor));
 }
+
+void
+actor_iter_assignment (TestConformSimpleFixture *fixure G_GNUC_UNUSED,
+                       gconstpointer dummy G_GNUC_UNUSED)
+{
+  ClutterActorIter iter_a, iter_b;
+  ClutterActor *actor;
+  ClutterActor *child;
+  int i, n_actors;
+
+  actor = clutter_actor_new ();
+  clutter_actor_set_name (actor, "root");
+  g_object_ref_sink (actor);
+
+  n_actors = g_random_int_range (10, 50);
+  for (i = 0; i < n_actors; i++)
+    {
+      char *name;
+
+      name = g_strdup_printf ("actor[%02d]", i);
+      child = clutter_actor_new ();
+      clutter_actor_set_name (child, name);
+
+      clutter_actor_add_child (actor, child);
+
+      g_free (name);
+    }
+
+  g_assert_cmpint (clutter_actor_get_n_children (actor), ==, n_actors);
+
+  i = 0;
+
+  clutter_actor_iter_init (&iter_a, actor);
+
+  iter_b = iter_a;
+
+  while (clutter_actor_iter_next (&iter_a, &child))
+    {
+      g_assert (CLUTTER_IS_ACTOR (child));
+      g_assert (clutter_actor_get_parent (child) == actor);
+
+      if (g_test_verbose ())
+        g_print ("actor %2d = '%s'\n", i, clutter_actor_get_name (child));
+
+      if (i == 0)
+        g_assert (child == clutter_actor_get_first_child (actor));
+
+      if (i == (n_actors - 1))
+        g_assert (child == clutter_actor_get_last_child (actor));
+
+      i += 1;
+    }
+
+  g_assert_cmpint (i, ==, n_actors);
+
+  i = n_actors;
+
+  while (clutter_actor_iter_prev (&iter_b, &child))
+    {
+      g_assert (clutter_actor_get_parent (child) == actor);
+
+      if (g_test_verbose ())
+        g_print ("actor %2d = '%s'\n", i, clutter_actor_get_name (child));
+
+      if (i == n_actors)
+        g_assert (child == clutter_actor_get_last_child (actor));
+
+      if (i == 1)
+        g_assert (child == clutter_actor_get_first_child (actor));
+
+      i -= 1;
+    }
+
+  g_assert_cmpint (i, ==, 0);
+
+  g_object_unref (actor);
+}

tests/conform/test-conform-main.c

@@ -149,6 +149,7 @@ main (int argc, char **argv)
 
   TEST_CONFORM_SIMPLE ("/actor/iter", actor_iter_traverse_children);
   TEST_CONFORM_SIMPLE ("/actor/iter", actor_iter_traverse_remove);
+  TEST_CONFORM_SIMPLE ("/actor/iter", actor_iter_assignment);
 
   TEST_CONFORM_SIMPLE ("/actor/invariants", actor_initial_state);
   TEST_CONFORM_SIMPLE ("/actor/invariants", actor_shown_not_parented);