[gspell] test: test GtkTextBuffer change

[Sébastien Wilmet <swilmet src gnome org>]

commit fe6f580ab8403915731e6df4dff3d68ba09a2c02
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Dec 31 11:37:58 2015 +0100

    test: test GtkTextBuffer change

 tests/test-spell.c |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)
---
diff --git a/tests/test-spell.c b/tests/test-spell.c
index 3e79e7f..8ce8095 100644
--- a/tests/test-spell.c
+++ b/tests/test-spell.c
@@ -102,6 +102,23 @@ highlight_checkbutton_toggled_cb (GtkToggleButton *checkbutton,
        }
 }
 
+static void
+change_buffer_button_clicked_cb (GtkButton *change_buffer_button,
+                                TestSpell *spell)
+{
+       GtkTextBuffer *old_buffer;
+       GtkTextBuffer *new_buffer;
+       GspellChecker *checker;
+
+       old_buffer = gtk_text_view_get_buffer (spell->view);
+       checker = gspell_text_buffer_get_spell_checker (old_buffer);
+
+       new_buffer = gtk_text_buffer_new (NULL);
+       gspell_text_buffer_set_spell_checker (new_buffer, checker);
+
+       gtk_text_view_set_buffer (spell->view, new_buffer);
+}
+
 static GtkWidget *
 get_sidebar (TestSpell *spell)
 {
@@ -109,6 +126,7 @@ get_sidebar (TestSpell *spell)
        GtkWidget *checker_button;
        GtkWidget *language_button;
        GtkWidget *highlight_checkbutton;
+       GtkWidget *change_buffer_button;
        GspellChecker *checker;
        const GspellLanguage *language;
 
@@ -156,6 +174,16 @@ get_sidebar (TestSpell *spell)
 
        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (highlight_checkbutton), TRUE);
 
+       /* Button to change the GtkTextBuffer */
+       change_buffer_button = gtk_button_new_with_mnemonic ("Change _Buffer!");
+       gtk_container_add (GTK_CONTAINER (sidebar),
+                          change_buffer_button);
+
+       g_signal_connect (change_buffer_button,
+                         "clicked",
+                         G_CALLBACK (change_buffer_button_clicked_cb),
+                         spell);
+
        return sidebar;
 }