[gspell/wip/entry: 6/7] Checker: add force_set_language() private function

[Sébastien Wilmet <swilmet src gnome org>]

commit c909f5af4651273d83dcead5c5a72a6052aac181
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Oct 30 18:19:08 2016 +0100

    Checker: add force_set_language() private function

 gspell/Makefile.am              |    1 +
 gspell/gspell-checker-private.h |   34 ++++++++++++++++++++++++++++++++++
 gspell/gspell-checker.c         |   31 +++++++++++++++++++++----------
 3 files changed, 56 insertions(+), 10 deletions(-)
---
diff --git a/gspell/Makefile.am b/gspell/Makefile.am
index f0d0685..e8e87f1 100644
--- a/gspell/Makefile.am
+++ b/gspell/Makefile.am
@@ -45,6 +45,7 @@ gspell_public_c_files =                               \
 gspell_private_headers =                       \
        gconstructor.h                          \
        gspellregion.h                          \
+       gspell-checker-private.h                \
        gspell-entry-private.h                  \
        gspell-entry-utils.h                    \
        gspell-init.h                           \
diff --git a/gspell/gspell-checker-private.h b/gspell/gspell-checker-private.h
new file mode 100644
index 0000000..c622876
--- /dev/null
+++ b/gspell/gspell-checker-private.h
@@ -0,0 +1,34 @@
+/*
+ * This file is part of gspell, a spell-checking library.
+ *
+ * Copyright 2016 - Sébastien Wilmet
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GSPELL_CHECKER_PRIVATE_H
+#define GSPELL_CHECKER_PRIVATE_H
+
+#include "gspell-checker.h"
+
+G_BEGIN_DECLS
+
+void           _gspell_checker_force_set_language      (GspellChecker        *checker,
+                                                        const GspellLanguage *language);
+
+G_END_DECLS
+
+#endif  /* GSPELL_CHECKER_PRIVATE_H */
+
+/* ex:set ts=8 noet: */
diff --git a/gspell/gspell-checker.c b/gspell/gspell-checker.c
index 2fbf8db..d501d50 100644
--- a/gspell/gspell-checker.c
+++ b/gspell/gspell-checker.c
@@ -20,6 +20,7 @@
 
 #include "config.h"
 #include "gspell-checker.h"
+#include "gspell-checker-private.h"
 #include <enchant.h>
 #include <glib/gi18n-lib.h>
 #include <string.h>
@@ -284,6 +285,25 @@ create_new_dictionary (GspellChecker *checker)
        gspell_checker_add_word_to_session (checker, app_name, -1);
 }
 
+/* Used for unit tests. Useful to force a NULL language. */
+void
+_gspell_checker_force_set_language (GspellChecker        *checker,
+                                   const GspellLanguage *language)
+{
+       GspellCheckerPrivate *priv;
+
+       g_return_if_fail (GSPELL_IS_CHECKER (checker));
+
+       priv = gspell_checker_get_instance_private (checker);
+
+       if (priv->active_lang != language)
+       {
+               priv->active_lang = language;
+               create_new_dictionary (checker);
+               g_object_notify (G_OBJECT (checker), "language");
+       }
+}
+
 /**
  * gspell_checker_set_language:
  * @checker: a #GspellChecker.
@@ -296,23 +316,14 @@ void
 gspell_checker_set_language (GspellChecker        *checker,
                             const GspellLanguage *language)
 {
-       GspellCheckerPrivate *priv;
-
        g_return_if_fail (GSPELL_IS_CHECKER (checker));
 
-       priv = gspell_checker_get_instance_private (checker);
-
        if (language == NULL)
        {
                language = gspell_language_get_default ();
        }
 
-       if (priv->active_lang != language)
-       {
-               priv->active_lang = language;
-               create_new_dictionary (checker);
-               g_object_notify (G_OBJECT (checker), "language");
-       }
+       _gspell_checker_force_set_language (checker, language);
 }
 
 /**