[tepl] Dumb FileSaver unit tests: add basic test

[Sébastien Wilmet <swilmet src gnome org>]

commit 60e29065f848cbd8ea851006c9063340b1093f5e
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue May 12 19:21:49 2020 +0200

    Dumb FileSaver unit tests: add basic test

 testsuite/meson.build       |  1 +
 testsuite/test-file-saver.c | 96 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 97 insertions(+)
---
diff --git a/testsuite/meson.build b/testsuite/meson.build
index ae0a5c6..e0571c9 100644
--- a/testsuite/meson.build
+++ b/testsuite/meson.build
@@ -4,6 +4,7 @@ unit_tests = [
   #'test-file',
   'test-file-content',
   'test-file-loader',
+  'test-file-saver',
   'test-fold-region',
   'test-info-bar',
   'test-metadata',
diff --git a/testsuite/test-file-saver.c b/testsuite/test-file-saver.c
new file mode 100644
index 0000000..153e685
--- /dev/null
+++ b/testsuite/test-file-saver.c
@@ -0,0 +1,96 @@
+/* SPDX-FileCopyrightText: 2020 - Sébastien Wilmet <swilmet gnome org>
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
+#include <tepl/tepl.h>
+
+static gchar *
+get_file_content (GFile *file)
+{
+       GError *error = NULL;
+       gchar *file_content = NULL;
+
+       g_file_load_contents (file, NULL, &file_content, NULL, NULL, &error);
+       g_assert_no_error (error);
+       g_assert_true (file_content != NULL);
+
+       return file_content;
+}
+
+static void
+check_equal_content (GFile       *file,
+                    const gchar *content)
+{
+       gchar *file_content;
+
+       file_content = get_file_content (file);
+       g_assert_true (g_str_equal (file_content, content));
+       g_free (file_content);
+}
+
+static void
+check_save_content_cb (GObject      *source_object,
+                      GAsyncResult *result,
+                      gpointer      user_data)
+{
+       TeplFileSaver *saver = TEPL_FILE_SAVER (source_object);
+       gboolean ok;
+       GError *error = NULL;
+
+       ok = tepl_file_saver_save_finish (saver, result, &error);
+       g_assert_true (ok);
+       g_assert_no_error (error);
+
+       gtk_main_quit ();
+}
+
+static void
+check_save_content (const gchar *content)
+{
+       TeplBuffer *buffer;
+       TeplFile *file;
+       GFile *location;
+       TeplFileSaver *saver;
+
+       buffer = tepl_buffer_new ();
+       gtk_text_buffer_set_text (GTK_TEXT_BUFFER (buffer), content, -1);
+
+       file = tepl_file_new ();
+       location = g_file_new_build_filename (g_get_tmp_dir (), "tepl-file-saver-test", NULL);
+       saver = tepl_file_saver_new_with_target (buffer, file, location);
+
+       tepl_file_saver_save_async (saver,
+                                   G_PRIORITY_DEFAULT,
+                                   NULL,
+                                   check_save_content_cb,
+                                   NULL);
+       gtk_main ();
+
+       check_equal_content (location, content);
+
+       g_object_unref (buffer);
+       g_object_unref (file);
+       g_object_unref (location);
+       g_object_unref (saver);
+}
+
+static void
+test_basic (void)
+{
+       check_save_content ("");
+       check_save_content ("ho");
+       check_save_content ("several\nlines");
+       check_save_content ("several\nlines\n");
+       check_save_content ("UTF-8-Évo");
+}
+
+int
+main (int    argc,
+      char **argv)
+{
+       gtk_test_init (&argc, &argv);
+
+       g_test_add_func ("/file_saver/basic", test_basic);
+
+       return g_test_run ();
+}