[libadwaita/wip/exalm/tab-view-fix: 1/2] tab-view: Add tests for the pages model

[Alexander Mikhaylenko <alexm src gnome org>]

commit 9bba46b603e146f5bdbc298a3ab355179f475144
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Wed Jun 9 12:39:24 2021 +0500

    tab-view: Add tests for the pages model
    
    Check if the selection is correct when adding/removing pages.
    
    Add a test case for https://gitlab.gnome.org/GNOME/libadwaita/-/issues/192

 tests/test-tab-view.c | 47 +++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 45 insertions(+), 2 deletions(-)
---
diff --git a/tests/test-tab-view.c b/tests/test-tab-view.c
index 4368c076..634d32d9 100644
--- a/tests/test-tab-view.c
+++ b/tests/test-tab-view.c
@@ -62,6 +62,18 @@ close_noop (void)
   return GDK_EVENT_STOP;
 }
 
+static void
+check_selection_non_null (AdwTabView *view)
+{
+  g_assert_nonnull (adw_tab_view_get_selected_page (view));
+}
+
+static void
+check_selection_null (AdwTabView *view)
+{
+  g_assert_null (adw_tab_view_get_selected_page (view));
+}
+
 static void
 test_adw_tab_view_n_pages (void)
 {
@@ -227,7 +239,7 @@ test_adw_tab_view_shortcut_widget (void)
 }
 
 static void
-test_adw_tab_view_pages (void)
+test_adw_tab_view_get_page (void)
 {
   g_autoptr (AdwTabView) view = NULL;
   GtkWidget *child1, *child2, *child3;
@@ -899,6 +911,36 @@ test_adw_tab_view_transfer (void)
   g_assert_true (adw_tab_view_get_nth_page (view1, 2) == pages2[3]);
 }
 
+static void
+test_adw_tab_view_pages (void)
+{
+  g_autoptr (AdwTabView) view = NULL;
+  g_autoptr (GtkSelectionModel) model = NULL;
+  AdwTabPage *pages[2];
+
+  view = g_object_ref_sink (ADW_TAB_VIEW (adw_tab_view_new ()));
+  model = adw_tab_view_get_pages (view);
+  g_assert_nonnull (view);
+  g_assert_nonnull (model);
+
+  g_signal_connect_swapped (model, "items-changed", G_CALLBACK (check_selection_non_null), view);
+  g_signal_connect_swapped (model, "selection-changed", G_CALLBACK (check_selection_non_null), view);
+
+  pages[0] = adw_tab_view_add_page (view, gtk_button_new (), NULL);
+  pages[1] = adw_tab_view_add_page (view, gtk_button_new (), NULL);
+
+  adw_tab_view_close_page (view, pages[0]);
+
+  g_signal_handlers_disconnect_by_func (model, G_CALLBACK (check_selection_non_null), view);
+
+  g_signal_connect_swapped (model, "items-changed", G_CALLBACK (check_selection_null), view);
+  g_signal_connect_swapped (model, "selection-changed", G_CALLBACK (check_selection_null), view);
+
+  adw_tab_view_close_page (view, pages[1]);
+
+  g_signal_handlers_disconnect_by_func (model, G_CALLBACK (check_selection_null), view);
+}
+
 static void
 test_adw_tab_page_title (void)
 {
@@ -1125,7 +1167,7 @@ main (int   argc,
   g_test_add_func ("/Adwaita/TabView/default_icon", test_adw_tab_view_default_icon);
   g_test_add_func ("/Adwaita/TabView/menu_model", test_adw_tab_view_menu_model);
   g_test_add_func ("/Adwaita/TabView/shortcut_widget", test_adw_tab_view_shortcut_widget);
-  g_test_add_func ("/Adwaita/TabView/pages", test_adw_tab_view_pages);
+  g_test_add_func ("/Adwaita/TabView/get_page", test_adw_tab_view_get_page);
   g_test_add_func ("/Adwaita/TabView/select", test_adw_tab_view_select);
   g_test_add_func ("/Adwaita/TabView/add_basic", test_adw_tab_view_add_basic);
   g_test_add_func ("/Adwaita/TabView/add_auto", test_adw_tab_view_add_auto);
@@ -1139,6 +1181,7 @@ main (int   argc,
   g_test_add_func ("/Adwaita/TabView/close_signal", test_adw_tab_view_close_signal);
   g_test_add_func ("/Adwaita/TabView/close_select", test_adw_tab_view_close_select);
   g_test_add_func ("/Adwaita/TabView/transfer", test_adw_tab_view_transfer);
+  g_test_add_func ("/Adwaita/TabView/pages", test_adw_tab_view_pages);
   g_test_add_func ("/Adwaita/TabPage/title", test_adw_tab_page_title);
   g_test_add_func ("/Adwaita/TabPage/tooltip", test_adw_tab_page_tooltip);
   g_test_add_func ("/Adwaita/TabPage/icon", test_adw_tab_page_icon);