testsuite: Skip some GtkDropDown properties

The ::factory and ::selected properties need to
be skipped.

testsuite/gtk/defaultvalue.c

@@ -411,6 +411,10 @@ G_GNUC_END_IGNORE_DEPRECATIONS
           strcmp (pspec->name, "adjustment") == 0)
         continue;
 
+      if (g_type_is_a (type, GTK_TYPE_DROP_DOWN) &&
+          strcmp (pspec->name, "factory") == 0)
+        continue;
+
       /* All the icontheme properties depend on the environment */
       if (g_type_is_a (type, GTK_TYPE_ICON_THEME))
         continue;

testsuite/gtk/notify.c

@@ -647,6 +647,11 @@ test_type (gconstpointer data)
             g_str_equal (pspec->name, "selected-item")))
          continue;
 
+       /* can't select items without an underlying, populated model */
+       if (g_type_is_a (type, GTK_TYPE_DROP_DOWN) &&
+           g_str_equal (pspec->name, "selected"))
+         continue;
+
        /* can't set position without a notebook */
        if (g_type_is_a (type, GTK_TYPE_NOTEBOOK_PAGE) &&
            g_str_equal (pspec->name, "position"))