[gtk/matthiasc/for-main] slicelistmodel: Improve a test

[Matthias Clasen <matthiasc src gnome org>]

commit d840e082e6a376a13613060d13b32c60ab9c63e0
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jul 17 06:27:39 2022 -0400

    slicelistmodel: Improve a test
    
    Make sure that replacements in the underlying model
    don't affect the slice list model if they are outside
    the slice window.

 testsuite/gtk/slicelistmodel.c | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/testsuite/gtk/slicelistmodel.c b/testsuite/gtk/slicelistmodel.c
index da87c8bd30..84a4ac72ba 100644
--- a/testsuite/gtk/slicelistmodel.c
+++ b/testsuite/gtk/slicelistmodel.c
@@ -305,6 +305,15 @@ test_changes (void)
   g_list_store_remove (store, 19);
   assert_changes (slice, "");
 
+  splice (store, 1, 1, (guint[]) { 111 }, 1);
+  assert_changes (slice, "");
+
+  splice (store, 18, 1, (guint[]) { 19, 20 }, 2);
+  assert_changes (slice, "");
+
+  g_list_store_remove (store, 19);
+  assert_changes (slice, "");
+
   g_list_store_remove (store, 1);
   assert_model (slice, "12 13 14 15 16");
   assert_changes (slice, "0-5+5");