[tepl] FileLoader unit tests: more tests

[Sébastien Wilmet <swilmet src gnome org>]

commit 7e5eb383f10e228c9741d61bfaf4b40be799532b
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue May 19 10:06:35 2020 +0200

    FileLoader unit tests: more tests

 testsuite/test-file-loader.c | 162 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 162 insertions(+)
---
diff --git a/testsuite/test-file-loader.c b/testsuite/test-file-loader.c
index 71754d0..c9551c6 100644
--- a/testsuite/test-file-loader.c
+++ b/testsuite/test-file-loader.c
@@ -3,6 +3,105 @@
  */
 
 #include <tepl/tepl.h>
+#include <string.h>
+
+static void
+set_file_content (GFile       *file,
+                 const gchar *content)
+{
+       GError *error = NULL;
+
+       g_file_replace_contents (file,
+                                content,
+                                strlen (content),
+                                NULL,
+                                FALSE,
+                                G_FILE_CREATE_REPLACE_DESTINATION,
+                                NULL,
+                                NULL,
+                                &error);
+       g_assert_no_error (error);
+}
+
+static GFile *
+get_tmp_location (void)
+{
+       return g_file_new_build_filename (g_get_tmp_dir (), "tepl-file-loader-test", NULL);
+}
+
+static void
+load_sync_cb (GObject      *source_object,
+             GAsyncResult *result,
+             gpointer      user_data)
+{
+       TeplFileLoader *loader = TEPL_FILE_LOADER (source_object);
+       GError **error = user_data;
+
+       tepl_file_loader_load_finish (loader, result, error);
+       gtk_main_quit ();
+}
+
+static void
+load_sync (TeplFileLoader  *loader,
+          GError         **error)
+{
+       tepl_file_loader_load_async (loader,
+                                    G_PRIORITY_DEFAULT,
+                                    NULL,
+                                    load_sync_cb,
+                                    error);
+       gtk_main ();
+}
+
+static void
+load_sync_expect_no_error (TeplFileLoader *loader)
+{
+       GError *error = NULL;
+
+       load_sync (loader, &error);
+       g_assert_no_error (error);
+}
+
+/* Useful to check that the buffer has been reset after the load. */
+static TeplBuffer *
+create_buffer (void)
+{
+       TeplBuffer *buffer = tepl_buffer_new ();
+       GtkTextBuffer *text_buffer = GTK_TEXT_BUFFER (buffer);
+       GtkSourceBuffer *gsv_buffer = GTK_SOURCE_BUFFER (buffer);
+
+       gtk_text_buffer_set_text (text_buffer, "Initial content", -1);
+       g_assert_true (gtk_source_buffer_can_undo (gsv_buffer));
+
+       return buffer;
+}
+
+static void
+check_buffer_state_after_load (TeplBuffer  *buffer,
+                              const gchar *expected_content)
+{
+       GtkTextBuffer *text_buffer = GTK_TEXT_BUFFER (buffer);
+       GtkSourceBuffer *gsv_buffer = GTK_SOURCE_BUFFER (buffer);
+       GtkTextIter start;
+       GtkTextIter end;
+       GtkTextIter selection_start;
+       GtkTextIter selection_end;
+       gchar *received_content;
+
+       gtk_text_buffer_get_bounds (text_buffer, &start, &end);
+       received_content = gtk_text_buffer_get_text (text_buffer, &start, &end, TRUE);
+       g_assert_true (g_str_equal (received_content, expected_content));
+       g_free (received_content);
+
+       g_assert_true (!gtk_text_buffer_get_modified (text_buffer));
+
+       g_assert_true (!gtk_source_buffer_can_undo (gsv_buffer));
+       g_assert_true (!gtk_source_buffer_can_redo (gsv_buffer));
+
+       gtk_text_buffer_get_selection_bounds (text_buffer, &selection_start, &selection_end);
+       g_assert_true (gtk_text_iter_is_start (&selection_start));
+       g_assert_true (gtk_text_iter_is_start (&selection_end));
+}
 
 static void
 test_properties (void)
@@ -28,6 +127,67 @@ test_properties (void)
        g_object_unref (loader);
 }
 
+static void
+test_non_existing_file (void)
+{
+       TeplBuffer *buffer;
+       TeplFile *file;
+       GFile *location;
+       TeplFileLoader *loader;
+       GError *error = NULL;
+
+       buffer = create_buffer ();
+       file = tepl_buffer_get_file (buffer);
+
+       location = get_tmp_location ();
+       g_file_delete (location, NULL, &error);
+       if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
+       {
+               g_clear_error (&error);
+       }
+       g_assert_no_error (error);
+
+       tepl_file_set_location (file, location);
+       loader = tepl_file_loader_new (buffer, file);
+
+       load_sync (loader, &error);
+       g_assert_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND);
+       g_clear_error (&error);
+
+       check_buffer_state_after_load (buffer, "");
+
+       g_object_unref (buffer);
+       g_object_unref (location);
+       g_object_unref (loader);
+}
+
+static void
+test_utf8_file (void)
+{
+       TeplBuffer *buffer;
+       TeplFile *file;
+       GFile *location;
+       const gchar *content;
+       TeplFileLoader *loader;
+
+       buffer = create_buffer ();
+       file = tepl_buffer_get_file (buffer);
+
+       location = get_tmp_location ();
+       content = "Valid UTF-8: ÉÈßÇ";
+       set_file_content (location, content);
+
+       tepl_file_set_location (file, location);
+       loader = tepl_file_loader_new (buffer, file);
+       load_sync_expect_no_error (loader);
+
+       check_buffer_state_after_load (buffer, content);
+
+       g_object_unref (buffer);
+       g_object_unref (location);
+       g_object_unref (loader);
+}
+
 int
 main (int    argc,
       char **argv)
@@ -35,6 +195,8 @@ main (int    argc,
        gtk_test_init (&argc, &argv);
 
        g_test_add_func ("/file_loader/properties", test_properties);
+       g_test_add_func ("/file_loader/non_existing_file", test_non_existing_file);
+       g_test_add_func ("/file_loader/utf8_file", test_utf8_file);
 
        return g_test_run ();
 }