1 /* GIO testing utilities
3 * Copyright (C) 2008-2010 Red Hat, Inc.
4 * Copyright (C) 2012 Collabora Ltd. <http://www.collabora.co.uk/>
6 * SPDX-License-Identifier: LGPL-2.1-or-later
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General
19 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 * Authors: David Zeuthen <davidz@redhat.com>
22 * Xavier Claessens <xavier.claessens@collabora.co.uk>
43 #include "gdbusconnection.h"
44 #include "gdbusprivate.h"
46 #include "gioenumtypes.h"
47 #include "gtestdbus.h"
52 #include "glib-unix.h"
53 #include "glib-unixprivate.h"
56 /* -------------------------------------------------------------------------- */
57 /* Utility: Wait until object has a single ref */
66 on_weak_notify_timeout (gpointer user_data)
68 WeakNotifyData *data = user_data;
69 data->timed_out = TRUE;
70 g_main_loop_quit (data->loop);
74 unref_on_idle (gpointer object)
76 g_object_unref (object);
81 _g_object_unref_and_wait_weak_notify (gpointer object)
86 data.loop = g_main_loop_new (NULL, FALSE);
87 data.timed_out = FALSE;
89 g_object_weak_ref (object, (GWeakNotify) g_main_loop_quit, data.loop);
91 /* Drop the strong ref held by the caller in an idle callback. This is to
92 * make sure the mainloop is already running when weak notify happens (when
93 * all other strong ref holders have dropped theirs). */
94 g_idle_add (unref_on_idle, object);
96 /* Make sure we don't block forever */
97 timeout_id = g_timeout_add_seconds_once (30, on_weak_notify_timeout, &data);
99 g_main_loop_run (data.loop);
103 g_warning ("Weak notify timeout, object ref_count=%d",
104 G_OBJECT (object)->ref_count);
108 g_source_remove (timeout_id);
111 g_main_loop_unref (data.loop);
112 return data.timed_out;
115 /* -------------------------------------------------------------------------- */
116 /* Utilities to cleanup the mess in the case unit test process crash */
120 /* This could be interesting to expose in public API */
122 _g_test_watcher_add_pid (GPid pid)
124 static gsize started = 0;
127 if (g_once_init_enter (&started))
129 JOBOBJECT_EXTENDED_LIMIT_INFORMATION info;
131 job = CreateJobObjectW (NULL, NULL);
132 memset (&info, 0, sizeof (info));
133 info.BasicLimitInformation.LimitFlags = 0x2000 /* JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE */;
135 if (!SetInformationJobObject(job, JobObjectExtendedLimitInformation, &info, sizeof (info)))
136 g_warning ("Can't enable JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE: %s", g_win32_error_message (GetLastError()));
138 g_once_init_leave (&started,(gsize)job);
141 job = (HANDLE)started;
143 if (!AssignProcessToJobObject(job, pid))
144 g_warning ("Can't assign process to job: %s", g_win32_error_message (GetLastError()));
148 _g_test_watcher_remove_pid (GPid pid)
150 /* No need to unassign the process from the job object as the process
151 will be killed anyway */
156 #define ADD_PID_FORMAT "add pid %d\n"
157 #define REMOVE_PID_FORMAT "remove pid %d\n"
160 watch_parent (gint fd)
164 GArray *pids_to_kill;
166 channel = g_io_channel_unix_new (fd);
169 fds[0].events = G_IO_HUP | G_IO_IN;
172 pids_to_kill = g_array_new (FALSE, FALSE, sizeof (guint));
177 gchar *command = NULL;
180 GError *error = NULL;
182 num_events = g_poll (fds, 1, -1);
186 if (fds[0].revents & G_IO_HUP)
188 /* Parent quit, cleanup the mess and exit */
189 for (n = 0; n < pids_to_kill->len; n++)
191 pid = g_array_index (pids_to_kill, guint, n);
192 g_printerr ("cleaning up pid %d\n", pid);
196 g_array_unref (pids_to_kill);
197 g_io_channel_shutdown (channel, FALSE, &error);
198 g_assert_no_error (error);
199 g_io_channel_unref (channel);
204 /* Read the command from the input */
205 g_io_channel_read_line (channel, &command, NULL, NULL, &error);
206 g_assert_no_error (error);
208 /* Check for known commands */
209 if (sscanf (command, ADD_PID_FORMAT, &pid) == 1)
211 g_array_append_val (pids_to_kill, pid);
213 else if (sscanf (command, REMOVE_PID_FORMAT, &pid) == 1)
215 for (n = 0; n < pids_to_kill->len; n++)
217 if (g_array_index (pids_to_kill, guint, n) == pid)
219 g_array_remove_index (pids_to_kill, n);
226 g_warning ("unknown pid %d to remove", pid);
231 g_warning ("unknown command from parent '%s'", command);
242 static gsize started = 0;
243 static GIOChannel *channel = NULL;
246 if (g_once_init_enter (&started))
250 /* fork a child to clean up when we are killed */
251 if (!g_unix_open_pipe_internal (pipe_fds, TRUE, FALSE))
254 g_warning ("pipe() failed: %s", g_strerror (errsv));
255 g_assert_not_reached ();
258 /* flush streams to avoid buffers being duplicated in the child and
259 * flushed by both the child and parent later
261 * FIXME: This is a workaround for the fact that watch_parent() uses
262 * non-async-signal-safe API. See
263 * https://gitlab.gnome.org/GNOME/glib/-/issues/2322#note_1034330
272 g_warning ("fork() failed: %s", g_strerror (errsv));
273 g_assert_not_reached ();
279 watch_parent (pipe_fds[0]);
285 channel = g_io_channel_unix_new (pipe_fds[1]);
288 g_once_init_leave (&started, 1);
295 watcher_send_command (const gchar *command)
298 GError *error = NULL;
301 channel = watcher_init ();
304 status = g_io_channel_write_chars (channel, command, -1, NULL, &error);
305 while (status == G_IO_STATUS_AGAIN);
306 g_assert_no_error (error);
308 g_io_channel_flush (channel, &error);
309 g_assert_no_error (error);
312 /* This could be interesting to expose in public API */
314 _g_test_watcher_add_pid (GPid pid)
318 command = g_strdup_printf (ADD_PID_FORMAT, (guint) pid);
319 watcher_send_command (command);
324 _g_test_watcher_remove_pid (GPid pid)
328 command = g_strdup_printf (REMOVE_PID_FORMAT, (guint) pid);
329 watcher_send_command (command);
335 /* -------------------------------------------------------------------------- */
336 /* GTestDBus object implementation */
340 * @short_description: D-Bus testing helper
341 * @include: gio/gio.h
343 * A helper class for testing code which uses D-Bus without touching the user's
346 * Note that #GTestDBus modifies the user’s environment, calling setenv().
347 * This is not thread-safe, so all #GTestDBus calls should be completed before
348 * threads are spawned, or should have appropriate locking to ensure no access
349 * conflicts to environment variables shared between #GTestDBus and other
352 * ## Creating unit tests using GTestDBus
354 * Testing of D-Bus services can be tricky because normally we only ever run
355 * D-Bus services over an existing instance of the D-Bus daemon thus we
356 * usually don't activate D-Bus services that are not yet installed into the
357 * target system. The #GTestDBus object makes this easier for us by taking care
358 * of the lower level tasks such as running a private D-Bus daemon and looking
359 * up uninstalled services in customizable locations, typically in your source
362 * The first thing you will need is a separate service description file for the
363 * D-Bus daemon. Typically a `services` subdirectory of your `tests` directory
364 * is a good place to put this file.
366 * The service file should list your service along with an absolute path to the
367 * uninstalled service executable in your source tree. Using autotools we would
368 * achieve this by adding a file such as `my-server.service.in` in the services
369 * directory and have it processed by configure.
372 * Name=org.gtk.GDBus.Examples.ObjectManager
373 * Exec=@abs_top_builddir@/gio/tests/gdbus-example-objectmanager-server
375 * You will also need to indicate this service directory in your test
376 * fixtures, so you will need to pass the path while compiling your
377 * test cases. Typically this is done with autotools with an added
378 * preprocessor flag specified to compile your tests such as:
380 * -DTEST_SERVICES=\""$(abs_top_builddir)/tests/services"\"
382 * Once you have a service definition file which is local to your source tree,
383 * you can proceed to set up a GTest fixture using the #GTestDBus scaffolding.
385 * An example of a test fixture for D-Bus services can be found
387 * [gdbus-test-fixture.c](https://gitlab.gnome.org/GNOME/glib/-/blob/HEAD/gio/tests/gdbus-test-fixture.c)
389 * Note that these examples only deal with isolating the D-Bus aspect of your
390 * service. To successfully run isolated unit tests on your service you may need
391 * some additional modifications to your test case fixture. For example; if your
392 * service uses GSettings and installs a schema then it is important that your test service
393 * not load the schema in the ordinary installed location (chances are that your service
394 * and schema files are not yet installed, or worse; there is an older version of the
395 * schema file sitting in the install location).
397 * Most of the time we can work around these obstacles using the
398 * environment. Since the environment is inherited by the D-Bus daemon
399 * created by #GTestDBus and then in turn inherited by any services the
400 * D-Bus daemon activates, using the setup routine for your fixture is
401 * a practical place to help sandbox your runtime environment. For the
402 * rather typical GSettings case we can work around this by setting
403 * `GSETTINGS_SCHEMA_DIR` to the in tree directory holding your schemas
404 * in the above fixture_setup() routine.
406 * The GSettings schemas need to be locally pre-compiled for this to work. This can be achieved
407 * by compiling the schemas locally as a step before running test cases, an autotools setup might
408 * do the following in the directory holding schemas:
411 * $(GLIB_COMPILE_SCHEMAS) .
413 * CLEANFILES += gschemas.compiled
417 typedef struct _GTestDBusClass GTestDBusClass;
418 typedef struct _GTestDBusPrivate GTestDBusPrivate;
423 * The #GTestDBus structure contains only private data and
424 * should only be accessed using the provided API.
431 GTestDBusPrivate *priv;
434 struct _GTestDBusClass {
435 GObjectClass parent_class;
438 struct _GTestDBusPrivate
440 GTestDBusFlags flags;
441 GPtrArray *service_dirs;
453 G_DEFINE_TYPE_WITH_PRIVATE (GTestDBus, g_test_dbus, G_TYPE_OBJECT)
456 g_test_dbus_init (GTestDBus *self)
458 self->priv = g_test_dbus_get_instance_private (self);
459 self->priv->service_dirs = g_ptr_array_new_with_free_func (g_free);
463 g_test_dbus_dispose (GObject *object)
465 GTestDBus *self = (GTestDBus *) object;
468 g_test_dbus_down (self);
470 G_OBJECT_CLASS (g_test_dbus_parent_class)->dispose (object);
474 g_test_dbus_finalize (GObject *object)
476 GTestDBus *self = (GTestDBus *) object;
478 g_ptr_array_unref (self->priv->service_dirs);
479 g_free (self->priv->bus_address);
481 G_OBJECT_CLASS (g_test_dbus_parent_class)->finalize (object);
485 g_test_dbus_get_property (GObject *object,
490 GTestDBus *self = (GTestDBus *) object;
495 g_value_set_flags (value, g_test_dbus_get_flags (self));
498 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
504 g_test_dbus_set_property (GObject *object,
509 GTestDBus *self = (GTestDBus *) object;
514 self->priv->flags = g_value_get_flags (value);
517 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
523 g_test_dbus_class_init (GTestDBusClass *klass)
525 GObjectClass *object_class = G_OBJECT_CLASS (klass);
527 object_class->dispose = g_test_dbus_dispose;
528 object_class->finalize = g_test_dbus_finalize;
529 object_class->get_property = g_test_dbus_get_property;
530 object_class->set_property = g_test_dbus_set_property;
535 * #GTestDBusFlags specifying the behaviour of the D-Bus session.
539 g_object_class_install_property (object_class, PROP_FLAGS,
540 g_param_spec_flags ("flags",
541 P_("D-Bus session flags"),
542 P_("Flags specifying the behaviour of the D-Bus session"),
543 G_TYPE_TEST_DBUS_FLAGS, G_TEST_DBUS_NONE,
544 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
545 G_PARAM_STATIC_STRINGS));
550 write_config_file (GTestDBus *self)
555 GError *error = NULL;
558 fd = g_file_open_tmp ("g-test-dbus-XXXXXX", &path, &error);
559 g_assert_no_error (error);
561 contents = g_string_new (NULL);
562 g_string_append (contents,
564 " <type>session</type>\n"
566 " <listen>nonce-tcp:</listen>\n"
568 " <listen>unix:tmpdir=/tmp</listen>\n"
572 for (i = 0; i < self->priv->service_dirs->len; i++)
574 const gchar *dir_path = g_ptr_array_index (self->priv->service_dirs, i);
576 g_string_append_printf (contents,
577 " <servicedir>%s</servicedir>\n", dir_path);
580 g_string_append (contents,
581 " <policy context=\"default\">\n"
582 " <!-- Allow everything to be sent -->\n"
583 " <allow send_destination=\"*\" eavesdrop=\"true\"/>\n"
584 " <!-- Allow everything to be received -->\n"
585 " <allow eavesdrop=\"true\"/>\n"
586 " <!-- Allow anyone to own anything -->\n"
587 " <allow own=\"*\"/>\n"
592 g_file_set_contents_full (path, contents->str, contents->len,
593 G_FILE_SET_CONTENTS_NONE,
595 g_assert_no_error (error);
597 g_string_free (contents, TRUE);
603 make_pipe (gint pipe_fds[2],
606 #if defined(G_OS_UNIX)
607 return g_unix_open_pipe (pipe_fds, O_CLOEXEC, error);
608 #elif defined(G_OS_WIN32)
609 if (_pipe (pipe_fds, 4096, _O_BINARY) < 0)
613 g_set_error (error, G_SPAWN_ERROR, G_SPAWN_ERROR_FAILED,
614 _("Failed to create pipe for communicating with child process (%s)"),
620 g_set_error (error, G_SPAWN_ERROR, G_SPAWN_ERROR_FAILED,
621 _("Pipes are not supported in this platform"));
627 start_daemon (GTestDBus *self)
629 const gchar *argv[] = {"dbus-daemon", "--print-address", "--config-file=foo", NULL};
630 gint pipe_fds[2] = {-1, -1};
633 gchar *print_address;
636 GError *error = NULL;
638 if (g_getenv ("G_TEST_DBUS_DAEMON") != NULL)
639 argv[0] = (gchar *)g_getenv ("G_TEST_DBUS_DAEMON");
641 make_pipe (pipe_fds, &error);
642 g_assert_no_error (error);
644 print_address = g_strdup_printf ("--print-address=%d", pipe_fds[1]);
645 argv[1] = print_address;
646 g_assert_no_error (error);
648 /* Write config file and set its path in argv */
649 config_path = write_config_file (self);
650 config_arg = g_strdup_printf ("--config-file=%s", config_path);
651 argv[2] = config_arg;
653 /* Spawn dbus-daemon */
654 g_spawn_async_with_pipes_and_fds (NULL,
657 /* We Need this to get the pid returned on win32 */
658 G_SPAWN_DO_NOT_REAP_CHILD |
659 G_SPAWN_SEARCH_PATH |
660 /* dbus-daemon will not abuse our descriptors, and
661 * passing this means we can use posix_spawn() for speed */
662 G_SPAWN_LEAVE_DESCRIPTORS_OPEN,
665 &pipe_fds[1], &pipe_fds[1], 1,
666 &self->priv->bus_pid,
669 g_assert_no_error (error);
671 _g_test_watcher_add_pid (self->priv->bus_pid);
673 /* Read bus address from pipe */
674 channel = g_io_channel_unix_new (pipe_fds[0]);
676 g_io_channel_set_close_on_unref (channel, TRUE);
677 g_io_channel_read_line (channel, &self->priv->bus_address, NULL,
679 g_assert_no_error (error);
680 self->priv->bus_address[termpos] = '\0';
684 /* start dbus-monitor */
685 if (g_getenv ("G_DBUS_MONITOR") != NULL)
689 command = g_strdup_printf ("dbus-monitor --address %s",
690 self->priv->bus_address);
691 g_spawn_command_line_async (command, NULL);
694 g_usleep (500 * 1000);
698 g_io_channel_shutdown (channel, FALSE, &error);
699 g_assert_no_error (error);
700 g_io_channel_unref (channel);
702 /* Don't use g_file_delete since it calls into gvfs */
703 if (g_unlink (config_path) != 0)
704 g_assert_not_reached ();
706 g_free (print_address);
707 g_free (config_path);
712 stop_daemon (GTestDBus *self)
715 if (!TerminateProcess (self->priv->bus_pid, 0))
716 g_warning ("Can't terminate process: %s", g_win32_error_message (GetLastError()));
718 kill (self->priv->bus_pid, SIGTERM);
720 _g_test_watcher_remove_pid (self->priv->bus_pid);
721 g_spawn_close_pid (self->priv->bus_pid);
722 self->priv->bus_pid = 0;
724 g_free (self->priv->bus_address);
725 self->priv->bus_address = NULL;
730 * @flags: a #GTestDBusFlags
732 * Create a new #GTestDBus object.
734 * Returns: (transfer full): a new #GTestDBus.
737 g_test_dbus_new (GTestDBusFlags flags)
739 return g_object_new (G_TYPE_TEST_DBUS,
745 * g_test_dbus_get_flags:
746 * @self: a #GTestDBus
748 * Get the flags of the #GTestDBus object.
750 * Returns: the value of #GTestDBus:flags property
753 g_test_dbus_get_flags (GTestDBus *self)
755 g_return_val_if_fail (G_IS_TEST_DBUS (self), G_TEST_DBUS_NONE);
757 return self->priv->flags;
761 * g_test_dbus_get_bus_address:
762 * @self: a #GTestDBus
764 * Get the address on which dbus-daemon is running. If g_test_dbus_up() has not
765 * been called yet, %NULL is returned. This can be used with
766 * g_dbus_connection_new_for_address().
768 * Returns: (nullable): the address of the bus, or %NULL.
771 g_test_dbus_get_bus_address (GTestDBus *self)
773 g_return_val_if_fail (G_IS_TEST_DBUS (self), NULL);
775 return self->priv->bus_address;
779 * g_test_dbus_add_service_dir:
780 * @self: a #GTestDBus
781 * @path: path to a directory containing .service files
783 * Add a path where dbus-daemon will look up .service files. This can't be
784 * called after g_test_dbus_up().
787 g_test_dbus_add_service_dir (GTestDBus *self,
790 g_return_if_fail (G_IS_TEST_DBUS (self));
791 g_return_if_fail (self->priv->bus_address == NULL);
793 g_ptr_array_add (self->priv->service_dirs, g_strdup (path));
798 * @self: a #GTestDBus
800 * Start a dbus-daemon instance and set DBUS_SESSION_BUS_ADDRESS. After this
801 * call, it is safe for unit tests to start sending messages on the session bus.
803 * If this function is called from setup callback of g_test_add(),
804 * g_test_dbus_down() must be called in its teardown callback.
806 * If this function is called from unit test's main(), then g_test_dbus_down()
807 * must be called after g_test_run().
810 g_test_dbus_up (GTestDBus *self)
812 g_return_if_fail (G_IS_TEST_DBUS (self));
813 g_return_if_fail (self->priv->bus_address == NULL);
814 g_return_if_fail (!self->priv->up);
818 g_test_dbus_unset ();
819 g_setenv ("DBUS_SESSION_BUS_ADDRESS", self->priv->bus_address, TRUE);
820 self->priv->up = TRUE;
826 * @self: a #GTestDBus
828 * Stop the session bus started by g_test_dbus_up().
830 * Unlike g_test_dbus_down(), this won't verify the #GDBusConnection
831 * singleton returned by g_bus_get() or g_bus_get_sync() is destroyed. Unit
832 * tests wanting to verify behaviour after the session bus has been stopped
833 * can use this function but should still call g_test_dbus_down() when done.
836 g_test_dbus_stop (GTestDBus *self)
838 g_return_if_fail (G_IS_TEST_DBUS (self));
839 g_return_if_fail (self->priv->bus_address != NULL);
846 * @self: a #GTestDBus
848 * Stop the session bus started by g_test_dbus_up().
850 * This will wait for the singleton returned by g_bus_get() or g_bus_get_sync()
851 * to be destroyed. This is done to ensure that the next unit test won't get a
852 * leaked singleton from this test.
855 g_test_dbus_down (GTestDBus *self)
857 GDBusConnection *connection;
859 g_return_if_fail (G_IS_TEST_DBUS (self));
860 g_return_if_fail (self->priv->up);
862 connection = _g_bus_get_singleton_if_exists (G_BUS_TYPE_SESSION);
863 if (connection != NULL)
864 g_dbus_connection_set_exit_on_close (connection, FALSE);
866 if (self->priv->bus_address != NULL)
869 if (connection != NULL)
870 _g_object_unref_and_wait_weak_notify (connection);
872 g_test_dbus_unset ();
873 _g_bus_forget_singleton (G_BUS_TYPE_SESSION);
874 self->priv->up = FALSE;
880 * Unset DISPLAY and DBUS_SESSION_BUS_ADDRESS env variables to ensure the test
881 * won't use user's session bus.
883 * This is useful for unit tests that want to verify behaviour when no session
884 * bus is running. It is not necessary to call this if unit test already calls
885 * g_test_dbus_up() before acquiring the session bus.
888 g_test_dbus_unset (void)
890 g_unsetenv ("DISPLAY");
891 g_unsetenv ("DBUS_SESSION_BUS_ADDRESS");
892 g_unsetenv ("DBUS_STARTER_ADDRESS");
893 g_unsetenv ("DBUS_STARTER_BUS_TYPE");
894 /* avoid using XDG_RUNTIME_DIR/bus */
895 g_unsetenv ("XDG_RUNTIME_DIR");