[libadwaita/wip/exalm/carousel-fix: 13/13] carousel: Add proper tests for insert()

[Alexander Mikhaylenko <alexm src gnome org>]

commit ea1573cf40ee2f71cb2a6ddfcebdfd4e2b18aa7a
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Wed Dec 29 13:13:00 2021 +0500

    carousel: Add proper tests for insert()
    
    Check that the widgets are in the correct order and position shifting
    works.

 tests/test-carousel.c | 40 ++++++++++++++++++++++++++--------------
 1 file changed, 26 insertions(+), 14 deletions(-)
---
diff --git a/tests/test-carousel.c b/tests/test-carousel.c
index 44cdb9b2..1bc87c33 100644
--- a/tests/test-carousel.c
+++ b/tests/test-carousel.c
@@ -14,6 +14,18 @@ notify_cb (GtkWidget *widget, gpointer data)
   notified++;
 }
 
+static void
+allocate_carousel (AdwCarousel *carousel)
+{
+  int width, height;
+
+  gtk_widget_measure (GTK_WIDGET (carousel), GTK_ORIENTATION_HORIZONTAL, -1,
+                      NULL, &width, NULL, NULL);
+  gtk_widget_measure (GTK_WIDGET (carousel), GTK_ORIENTATION_VERTICAL, -1,
+                      NULL, &height, NULL, NULL);
+  gtk_widget_allocate (GTK_WIDGET (carousel), width, height, 0, NULL);
+}
+
 static void
 test_adw_carousel_add_remove (void)
 {
@@ -34,36 +46,36 @@ test_adw_carousel_add_remove (void)
   g_assert_cmpint (notified, ==, 1);
 
   adw_carousel_prepend (carousel, child2);
+  allocate_carousel (carousel);
   g_assert_cmpuint (adw_carousel_get_n_pages (carousel), ==, 2);
+  g_assert_true (adw_carousel_get_nth_page (carousel, 0) == child2);
+  g_assert_true (adw_carousel_get_nth_page (carousel, 1) == child1);
+  g_assert_cmpfloat (adw_carousel_get_position (carousel), ==, 1);
   g_assert_cmpint (notified, ==, 2);
 
   adw_carousel_insert (carousel, child3, 1);
+  allocate_carousel (carousel);
   g_assert_cmpuint (adw_carousel_get_n_pages (carousel), ==, 3);
+  g_assert_true (adw_carousel_get_nth_page (carousel, 0) == child2);
+  g_assert_true (adw_carousel_get_nth_page (carousel, 1) == child3);
+  g_assert_true (adw_carousel_get_nth_page (carousel, 2) == child1);
+  g_assert_cmpfloat (adw_carousel_get_position (carousel), ==, 2);
   g_assert_cmpint (notified, ==, 3);
 
-  adw_carousel_remove (carousel, child1);
+  adw_carousel_scroll_to (carousel, child3, FALSE);
+  adw_carousel_remove (carousel, child2);
+  allocate_carousel (carousel);
   g_assert_cmpuint (adw_carousel_get_n_pages (carousel), ==, 2);
+  g_assert_cmpfloat (adw_carousel_get_position (carousel), ==, 0);
   g_assert_cmpint (notified, ==, 4);
 
-  adw_carousel_remove (carousel, child2);
+  adw_carousel_remove (carousel, child1);
   g_assert_cmpuint (adw_carousel_get_n_pages (carousel), ==, 1);
   g_assert_cmpint (notified, ==, 5);
 
   g_assert_finalize_object (carousel);
 }
 
-static void
-allocate_carousel (AdwCarousel *carousel)
-{
-  int width, height;
-
-  gtk_widget_measure (GTK_WIDGET (carousel), GTK_ORIENTATION_HORIZONTAL, -1,
-                      NULL, &width, NULL, NULL);
-  gtk_widget_measure (GTK_WIDGET (carousel), GTK_ORIENTATION_VERTICAL, -1,
-                      NULL, &height, NULL, NULL);
-  gtk_widget_allocate (GTK_WIDGET (carousel), width, height, 0, NULL);
-}
-
 static void
 assert_carousel_positions (AdwCarousel *carousel,
                            GtkWidget   *child1,