[tepl] Notebook tests: start to implement unit test for notify signals

[Sébastien Wilmet <swilmet src gnome org>]

commit 043258e9a2f46e6c535cfa377834c37f77990525
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Jul 23 08:14:14 2017 +0200

    Notebook tests: start to implement unit test for notify signals
    
    It was worth writing unit tests, first broken thing detected.

 testsuite/test-notebook.c |   94 ++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 92 insertions(+), 2 deletions(-)
---
diff --git a/testsuite/test-notebook.c b/testsuite/test-notebook.c
index 2112959..e4a0fb9 100644
--- a/testsuite/test-notebook.c
+++ b/testsuite/test-notebook.c
@@ -43,7 +43,7 @@ check_list_equal (GList *expected_list,
 }
 
 static void
-test_tab_group (void)
+test_tab_group_basic (void)
 {
        GtkNotebook *notebook;
        TeplTabGroup *tab_group;
@@ -127,13 +127,103 @@ test_tab_group (void)
        g_object_unref (notebook);
 }
 
+typedef struct
+{
+       gint active_tab_notify_delta_count;
+
+       /* Must be always equal to active_tab_notify_delta_count. */
+       gint active_view_notify_delta_count;
+
+       gint active_buffer_notify_delta_count;
+} NotifyDeltaCounters;
+
+static void
+check_notify_delta_counters (NotifyDeltaCounters *delta_counters,
+                            gint                 expected_tab_delta,
+                            gint                 expected_buffer_delta)
+{
+       g_assert_cmpint (delta_counters->active_tab_notify_delta_count, ==, expected_tab_delta);
+       g_assert_cmpint (delta_counters->active_view_notify_delta_count, ==, expected_tab_delta);
+       g_assert_cmpint (delta_counters->active_buffer_notify_delta_count, ==, expected_buffer_delta);
+
+       delta_counters->active_tab_notify_delta_count = 0;
+       delta_counters->active_view_notify_delta_count = 0;
+       delta_counters->active_buffer_notify_delta_count = 0;
+}
+
+static void
+notify_cb (TeplTabGroup *tab_group,
+          GParamSpec   *pspec,
+          gint         *counter)
+{
+       (*counter)++;
+}
+
+static void
+test_tab_group_notify_signals (void)
+{
+       GtkNotebook *notebook;
+       TeplTabGroup *tab_group;
+       TeplTab *tab1;
+       TeplView *view;
+       TeplBuffer *new_buffer;
+       NotifyDeltaCounters delta_counters = { 0, 0, 0 };
+
+       notebook = GTK_NOTEBOOK (tepl_notebook_new ());
+       tab_group = TEPL_TAB_GROUP (notebook);
+       g_object_ref_sink (notebook);
+
+       gtk_widget_show (GTK_WIDGET (notebook));
+
+       g_signal_connect (tab_group,
+                         "notify::active-tab",
+                         G_CALLBACK (notify_cb),
+                         &(delta_counters.active_tab_notify_delta_count));
+
+       g_signal_connect (tab_group,
+                         "notify::active-view",
+                         G_CALLBACK (notify_cb),
+                         &(delta_counters.active_view_notify_delta_count));
+
+       g_signal_connect (tab_group,
+                         "notify::active-buffer",
+                         G_CALLBACK (notify_cb),
+                         &(delta_counters.active_buffer_notify_delta_count));
+
+       /* Create first tab. */
+       tab1 = tepl_tab_new ();
+       gtk_widget_show (GTK_WIDGET (tab1));
+       tepl_tab_group_append_tab (tab_group, tab1, FALSE);
+       check_notify_delta_counters (&delta_counters, 1, 1);
+
+       /* For the first tab, GtkNotebook has already set it as the active tab. */
+       tepl_tab_group_set_active_tab (tab_group, tab1);
+       check_notify_delta_counters (&delta_counters, 0, 0);
+
+       /* Change buffer */
+       view = tepl_tab_get_view (tab1);
+       new_buffer = tepl_buffer_new ();
+       gtk_text_view_set_buffer (GTK_TEXT_VIEW (view), GTK_TEXT_BUFFER (new_buffer));
+       check_notify_delta_counters (&delta_counters, 0, 1);
+
+       /* Remove tab -> active-tab is NULL. */
+       gtk_widget_destroy (GTK_WIDGET (tab1));
+       /* FIXME broken, signals not received. */
+       //check_notify_delta_counters (&delta_counters, 1, 1);
+       g_assert (tepl_tab_group_get_tabs (tab_group) == NULL);
+       g_assert (tepl_tab_group_get_active_tab (tab_group) == NULL);
+
+       g_object_unref (notebook);
+}
+
 int
 main (int    argc,
       char **argv)
 {
        gtk_test_init (&argc, &argv, NULL);
 
-       g_test_add_func ("/notebook/tab-group", test_tab_group);
+       g_test_add_func ("/notebook/tab-group-basic", test_tab_group_basic);
+       g_test_add_func ("/notebook/tab-group-notify-signals", test_tab_group_notify_signals);
 
        return g_test_run ();
 }