testsuite: Add a test for icon names

This test just checks that all the icon names that GTK uses are present
in the default icon theme.

As icon names are not checked programmatically and we do not want to run
into missing-icon icons in the code, this test seems necessary.

For now, it's just a stub that tests stock icons.

testsuite/gtk/Makefile.am

@@ -32,6 +32,7 @@ TEST_PROGS += 			\
 	bitmask			\
 	builder			\
 	cellarea		\
+	check-icon-names	\
 	clipboard		\
 	defaultvalue		\
 	entry			\

testsuite/gtk/check-icon-names.c

@@ -0,0 +1,147 @@
+#include <gtk/gtk.h>
+
+static char *icon_names[] = {
+  /* stock icons */
+  "dialog-password",
+  "dialog-error",
+  "dialog-information",
+  "dialog-question",
+  "dialog-warning",
+  /* "gtk-dnd", */
+  /* "gtk-dnd-multiple", */
+  /* "gtk-apply", */
+  /* "gtk-cancel", */
+  /* "gtk-no", */
+  /* "gtk-ok", */
+  /* "gtk-yes", */
+  "window-close",
+  "list-add",
+  "format-justify-center",
+  "format-justify-fill",
+  "format-justify-left",
+  "format-justify-right",
+  "go-bottom",
+  "media-optical",
+  /* "gtk-convert", */
+  "edit-copy",
+  "edit-cut",
+  "go-down",
+  "system-run",
+  "application-exit",
+  "go-first",
+  /* "gtk-select-font", */
+  "view-fullscreen",
+  "view-restore",
+  "drive-harddisk",
+  "help-contents",
+  "go-home",
+  "dialog-information",
+  "go-jump",
+  "go-last",
+  "go-previous",
+  "image-missing",
+  "network-idle",
+  "document-new",
+  "document-open",
+  /* "gtk-orientation-portrait", */
+  /* "gtk-orientation-landscape", */
+  /* "gtk-orientation-reverse-portrait", */
+  /* "gtk-orientation-reverse-landscape", */
+  /* "gtk-page-setup", */
+  "edit-paste",
+  /* "gtk-preferences", */
+  "document-print",
+  "printer-error",
+  /* "printer-paused", */
+  "document-print-preview",
+  /* "printer-info", */
+  /* "printer-warning", */
+  "document-properties",
+  "edit-redo",
+  "list-remove",
+  "view-refresh",
+  "document-revert",
+  "go-next",
+  "document-save",
+  "media-floppy",
+  "document-save-as",
+  "edit-find",
+  "edit-find-replace",
+  "view-sort-descending",
+  "view-sort-ascending",
+  "tools-check-spelling",
+  "process-stop",
+  "format-text-bold",
+  "format-text-italic",
+  "format-text-strikethrough",
+  "format-text-underline",
+  "format-indent-more",
+  "format-indent-less",
+  "go-top",
+  "edit-delete",
+  /* "gtk-undelete", */
+  "edit-undo",
+  "go-up",
+  "text-x-generic",
+  "folder",
+  "help-about",
+  /* "gtk-connect", */
+  /* "gtk-disconnect", */
+  /* "gtk-edit", */
+  /* "gtk-caps-lock-warning", */
+  "media-seek-forward",
+  "media-skip-forward",
+  "media-playback-pause",
+  "media-playback-start",
+  "media-skip-backward",
+  "media-record",
+  "media-seek-backward",
+  "media-playback-stop",
+  /* "gtk-index", */
+  "zoom-original",
+  "zoom-in",
+  "zoom-out",
+  "zoom-fit-best",
+  "edit-select-all",
+  "edit-clear"
+  /* "gtk-select-color", */
+  /* "gtk-color-picker" */
+};
+
+static void
+test_icon_existence (gconstpointer icon_name)
+{
+  GtkIconInfo *info;
+
+  /* Not using generic fallback and builtins here, as we explicitly want to check the
+   * icon theme.
+   * The icon size is randomly chosen.
+   */
+  info = gtk_icon_theme_lookup_icon (gtk_icon_theme_get_default (), icon_name, 16, 0);
+  if (info == NULL)
+    {
+      g_test_message ("Failed to look up icon for \"%s\"", (char *) icon_name);
+      g_test_fail ();
+      return;
+    }
+
+  g_object_unref (info);
+}
+
+int
+main (int argc, char *argv[])
+{
+  guint i;
+  char *test_name;
+
+  gtk_test_init (&argc, &argv);
+
+  for (i = 0; i < G_N_ELEMENTS (icon_names); i++)
+    {
+      test_name = g_strdup_printf ("/check-icon-names/%s", icon_names[i]);
+      g_test_add_data_func (test_name, icon_names[i], test_icon_existence);
+      g_free (test_name);
+    }
+
+  return g_test_run();
+}