[gtksourceview] testsuite: set style scheme for highlighting

[Christian Hergert <chergert src gnome org>]

commit f34af3ca3d32736b5d301fef3b84dbfe931039ae
Author: Christian Hergert <chergert redhat com>
Date:   Thu Jan 6 19:42:45 2022 -0800

    testsuite: set style scheme for highlighting

 testsuite/test-vim-input.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/testsuite/test-vim-input.c b/testsuite/test-vim-input.c
index c0122f06..3457ccbf 100644
--- a/testsuite/test-vim-input.c
+++ b/testsuite/test-vim-input.c
@@ -35,10 +35,14 @@ run_test (const char *text,
 {
        GtkSourceView *view = GTK_SOURCE_VIEW (g_object_ref_sink (gtk_source_view_new ()));
        GtkSourceBuffer *buffer = GTK_SOURCE_BUFFER (gtk_text_view_get_buffer (GTK_TEXT_VIEW (view)));
+       GtkSourceStyleSchemeManager *schemes = gtk_source_style_scheme_manager_get_default ();
+       GtkSourceStyleScheme *scheme = gtk_source_style_scheme_manager_get_scheme (schemes, "Adwaita");
        GtkSourceVim *vim = gtk_source_vim_new (view);
        GtkTextIter begin, end;
        char *ret;
 
+       gtk_source_buffer_set_style_scheme (buffer, scheme);
+
        gtk_text_buffer_set_text (GTK_TEXT_BUFFER (buffer), text, -1);
        gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (buffer), &begin, &end);
        gtk_text_buffer_select_range (GTK_TEXT_BUFFER (buffer), &begin, &begin);