glocalfile: Add test case for g_file_trash

g_local_file_trash has been changed to return G_IO_ERROR_NOT_SUPPORTED
for locations on system-internal mounts. Let's verify that.

https://gitlab.gnome.org/GNOME/glib/issues/251

gio/tests/Makefile.am

@@ -273,6 +273,7 @@ test_programs += \
 	unix-mounts				\
 	unix-streams				\
 	g-file-info-filesystem-readonly		\
+	trash					\
 	$(NULL)
 
 test_extra_programs += \

gio/tests/meson.build

@@ -123,6 +123,7 @@ if host_machine.system() != 'windows'
     'unix-streams',
     'g-file-info-filesystem-readonly',
     'gschema-compile',
+    'trash',
   ]
 
   # Uninstalled because of the check-for-executable logic in DesktopAppInfo

gio/tests/trash.c

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2018 Red Hat, Inc.
+ *
+ * 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
+ * licence, or (at your option) any later version.
+ *
+ * This 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/>.
+ */
+
+#include <glib.h>
+
+#ifndef G_OS_UNIX
+#error This is a Unix-specific test
+#endif
+
+#include <glib/gstdio.h>
+#include <gio/gio.h>
+#include <gio/gunixmounts.h>
+
+/* Test that g_file_trash() returns G_IO_ERROR_NOT_SUPPORTED for files on system mounts. */
+static void
+test_trash_not_supported (void)
+{
+  GFile *file;
+  GFileIOStream *stream;
+  GUnixMountEntry *mount;
+  GFileInfo *info;
+  GError *error = NULL;
+  gboolean ret;
+  GStatBuf file_stat, home_stat;
+
+  /* The test assumes that tmp file is located on system internal mount. */
+  file = g_file_new_tmp ("test-trashXXXXXX", &stream, &error);
+  g_assert_no_error (error);
+  g_assert_cmpint (g_lstat (g_file_peek_path (file), &file_stat), ==, 0);
+  g_test_message ("File: %s (dev: %lu)", g_file_peek_path (file), file_stat.st_dev);
+
+  g_assert_cmpint (g_stat (g_get_home_dir (), &home_stat), ==, 0);
+  g_test_message ("Home: %s (dev: %lu)", g_get_home_dir (), home_stat.st_dev);
+
+  if (file_stat.st_dev == home_stat.st_dev)
+    {
+      g_test_skip ("The file has to be on another filesystem than the home folder to run this test");
+
+      g_object_unref (stream);
+      g_object_unref (file);
+
+      return;
+    }
+
+  mount = g_unix_mount_for (g_file_peek_path (file), NULL);
+  g_assert_nonnull (mount);
+
+  g_assert_true (g_unix_mount_is_system_internal (mount));
+  g_unix_mount_free (mount);
+
+  /* g_file_trash() shouldn't be supported on system internal mounts,
+   * because those are not monitored by gvfsd-trash.
+   */
+  ret = g_file_trash (file, NULL, &error);
+  g_assert_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED);
+  g_test_message ("Error: %s", error->message);
+  g_assert_false (ret);
+  g_clear_error (&error);
+
+  info = g_file_query_info (file,
+                            G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH,
+                            G_FILE_QUERY_INFO_NONE,
+                            NULL,
+                            &error);
+  g_assert_no_error (error);
+
+  g_assert_false (g_file_info_get_attribute_boolean (info,
+                                                     G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH));
+
+  g_io_stream_close (G_IO_STREAM (stream), NULL, &error);
+  g_assert_no_error (error);
+
+  g_object_unref (info);
+  g_object_unref (stream);
+  g_object_unref (file);
+}
+
+int
+main (int argc, char *argv[])
+{
+  g_test_init (&argc, &argv, NULL);
+
+  g_test_bug_base ("htps://gitlab.gnome.org/GNOME/glib/issues/");
+  g_test_bug ("251");
+
+  g_test_add_func ("/trash/not-supported", test_trash_not_supported);
+
+  return g_test_run ();
+}
+