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)
126 if (g_once_init_enter (&job))
128 JOBOBJECT_EXTENDED_LIMIT_INFORMATION info;
130 HANDLE tmp = CreateJobObjectW (NULL, NULL);
131 memset (&info, 0, sizeof (info));
132 info.BasicLimitInformation.LimitFlags = 0x2000 /* JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE */;
134 if (!SetInformationJobObject (tmp, JobObjectExtendedLimitInformation, &info, sizeof (info)))
135 g_warning ("Can't enable JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE: %s", g_win32_error_message (GetLastError()));
137 g_once_init_leave_pointer (&job, tmp);
140 if (!AssignProcessToJobObject(job, pid))
141 g_warning ("Can't assign process to job: %s", g_win32_error_message (GetLastError()));
145 _g_test_watcher_remove_pid (GPid pid)
147 /* No need to unassign the process from the job object as the process
148 will be killed anyway */
153 #define ADD_PID_FORMAT "add pid %d\n"
154 #define REMOVE_PID_FORMAT "remove pid %d\n"
157 watch_parent (gint fd)
161 GArray *pids_to_kill;
163 channel = g_io_channel_unix_new (fd);
166 fds[0].events = G_IO_HUP | G_IO_IN;
169 pids_to_kill = g_array_new (FALSE, FALSE, sizeof (guint));
174 gchar *command = NULL;
177 GError *error = NULL;
179 num_events = g_poll (fds, 1, -1);
183 if (fds[0].revents & G_IO_HUP)
185 /* Parent quit, cleanup the mess and exit */
186 for (n = 0; n < pids_to_kill->len; n++)
188 pid = g_array_index (pids_to_kill, guint, n);
189 g_printerr ("cleaning up pid %d\n", pid);
193 g_array_unref (pids_to_kill);
194 g_io_channel_shutdown (channel, FALSE, &error);
195 g_assert_no_error (error);
196 g_io_channel_unref (channel);
201 /* Read the command from the input */
202 g_io_channel_read_line (channel, &command, NULL, NULL, &error);
203 g_assert_no_error (error);
205 /* Check for known commands */
206 if (sscanf (command, ADD_PID_FORMAT, &pid) == 1)
208 g_array_append_val (pids_to_kill, pid);
210 else if (sscanf (command, REMOVE_PID_FORMAT, &pid) == 1)
212 for (n = 0; n < pids_to_kill->len; n++)
214 if (g_array_index (pids_to_kill, guint, n) == pid)
216 g_array_remove_index (pids_to_kill, n);
223 g_warning ("unknown pid %d to remove", pid);
228 g_warning ("unknown command from parent '%s'", command);
239 static gsize started = 0;
240 static GIOChannel *channel = NULL;
243 if (g_once_init_enter (&started))
247 /* fork a child to clean up when we are killed */
248 if (!g_unix_open_pipe_internal (pipe_fds, TRUE, FALSE))
251 g_warning ("pipe() failed: %s", g_strerror (errsv));
252 g_assert_not_reached ();
255 /* flush streams to avoid buffers being duplicated in the child and
256 * flushed by both the child and parent later
258 * FIXME: This is a workaround for the fact that watch_parent() uses
259 * non-async-signal-safe API. See
260 * https://gitlab.gnome.org/GNOME/glib/-/issues/2322#note_1034330
269 g_warning ("fork() failed: %s", g_strerror (errsv));
270 g_assert_not_reached ();
276 watch_parent (pipe_fds[0]);
282 channel = g_io_channel_unix_new (pipe_fds[1]);
285 g_once_init_leave (&started, 1);
292 watcher_send_command (const gchar *command)
295 GError *error = NULL;
298 channel = watcher_init ();
301 status = g_io_channel_write_chars (channel, command, -1, NULL, &error);
302 while (status == G_IO_STATUS_AGAIN);
303 g_assert_no_error (error);
305 g_io_channel_flush (channel, &error);
306 g_assert_no_error (error);
309 /* This could be interesting to expose in public API */
311 _g_test_watcher_add_pid (GPid pid)
315 command = g_strdup_printf (ADD_PID_FORMAT, (guint) pid);
316 watcher_send_command (command);
321 _g_test_watcher_remove_pid (GPid pid)
325 command = g_strdup_printf (REMOVE_PID_FORMAT, (guint) pid);
326 watcher_send_command (command);
332 /* -------------------------------------------------------------------------- */
333 /* GTestDBus object implementation */
338 * A helper class for testing code which uses D-Bus without touching the user’s
341 * Note that `GTestDBus` modifies the user’s environment, calling
342 * [`setenv()`](man:setenv(3)). This is not thread-safe, so all `GTestDBus`
343 * calls should be completed before threads are spawned, or should have
344 * appropriate locking to ensure no access conflicts to environment variables
345 * shared between `GTestDBus` and other threads.
347 * ## Creating unit tests using `GTestDBus`
349 * Testing of D-Bus services can be tricky because normally we only ever run
350 * D-Bus services over an existing instance of the D-Bus daemon thus we
351 * usually don’t activate D-Bus services that are not yet installed into the
352 * target system. The `GTestDBus` object makes this easier for us by taking care
353 * of the lower level tasks such as running a private D-Bus daemon and looking
354 * up uninstalled services in customizable locations, typically in your source
357 * The first thing you will need is a separate service description file for the
358 * D-Bus daemon. Typically a `services` subdirectory of your `tests` directory
359 * is a good place to put this file.
361 * The service file should list your service along with an absolute path to the
362 * uninstalled service executable in your source tree. Using autotools we would
363 * achieve this by adding a file such as `my-server.service.in` in the services
364 * directory and have it processed by configure.
368 * Name=org.gtk.GDBus.Examples.ObjectManager
369 * Exec=@abs_top_builddir@/gio/tests/gdbus-example-objectmanager-server
372 * You will also need to indicate this service directory in your test
373 * fixtures, so you will need to pass the path while compiling your
374 * test cases. Typically this is done with autotools with an added
375 * preprocessor flag specified to compile your tests such as:
378 * -DTEST_SERVICES=\""$(abs_top_builddir)/tests/services"\"
381 * Once you have a service definition file which is local to your source tree,
382 * you can proceed to set up a GTest fixture using the `GTestDBus` scaffolding.
384 * An example of a test fixture for D-Bus services can be found
386 * [gdbus-test-fixture.c](https://gitlab.gnome.org/GNOME/glib/-/blob/HEAD/gio/tests/gdbus-test-fixture.c)
388 * Note that these examples only deal with isolating the D-Bus aspect of your
389 * service. To successfully run isolated unit tests on your service you may need
390 * some additional modifications to your test case fixture. For example; if your
391 * service uses [class@Gio.Settings] and installs a schema then it is important
392 * that your test service not load the schema in the ordinary installed location
393 * (chances are that your service and schema files are not yet installed, or
394 * worse; there is an older version of the schema file sitting in the install
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
407 * can be achieved by compiling the schemas locally as a step before running
408 * test cases, an autotools setup might do the following in the directory
413 * $(GLIB_COMPILE_SCHEMAS) .
415 * CLEANFILES += gschemas.compiled
421 typedef struct _GTestDBusClass GTestDBusClass;
422 typedef struct _GTestDBusPrivate GTestDBusPrivate;
427 GTestDBusPrivate *priv;
430 struct _GTestDBusClass {
431 GObjectClass parent_class;
434 struct _GTestDBusPrivate
436 GTestDBusFlags flags;
437 GPtrArray *service_dirs;
449 G_DEFINE_TYPE_WITH_PRIVATE (GTestDBus, g_test_dbus, G_TYPE_OBJECT)
452 g_test_dbus_init (GTestDBus *self)
454 self->priv = g_test_dbus_get_instance_private (self);
455 self->priv->service_dirs = g_ptr_array_new_with_free_func (g_free);
459 g_test_dbus_dispose (GObject *object)
461 GTestDBus *self = (GTestDBus *) object;
464 g_test_dbus_down (self);
466 G_OBJECT_CLASS (g_test_dbus_parent_class)->dispose (object);
470 g_test_dbus_finalize (GObject *object)
472 GTestDBus *self = (GTestDBus *) object;
474 g_ptr_array_unref (self->priv->service_dirs);
475 g_free (self->priv->bus_address);
477 G_OBJECT_CLASS (g_test_dbus_parent_class)->finalize (object);
481 g_test_dbus_get_property (GObject *object,
486 GTestDBus *self = (GTestDBus *) object;
491 g_value_set_flags (value, g_test_dbus_get_flags (self));
494 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
500 g_test_dbus_set_property (GObject *object,
505 GTestDBus *self = (GTestDBus *) object;
510 self->priv->flags = g_value_get_flags (value);
513 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
519 g_test_dbus_class_init (GTestDBusClass *klass)
521 GObjectClass *object_class = G_OBJECT_CLASS (klass);
523 object_class->dispose = g_test_dbus_dispose;
524 object_class->finalize = g_test_dbus_finalize;
525 object_class->get_property = g_test_dbus_get_property;
526 object_class->set_property = g_test_dbus_set_property;
531 * #GTestDBusFlags specifying the behaviour of the D-Bus session.
535 g_object_class_install_property (object_class, PROP_FLAGS,
536 g_param_spec_flags ("flags", NULL, NULL,
537 G_TYPE_TEST_DBUS_FLAGS, G_TEST_DBUS_NONE,
538 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
539 G_PARAM_STATIC_STRINGS));
544 write_config_file (GTestDBus *self)
549 GError *error = NULL;
552 fd = g_file_open_tmp ("g-test-dbus-XXXXXX", &path, &error);
553 g_assert_no_error (error);
555 contents = g_string_new (NULL);
556 g_string_append (contents,
558 " <type>session</type>\n"
560 " <listen>nonce-tcp:</listen>\n"
562 " <listen>unix:tmpdir=/tmp</listen>\n"
566 for (i = 0; i < self->priv->service_dirs->len; i++)
568 const gchar *dir_path = g_ptr_array_index (self->priv->service_dirs, i);
570 g_string_append_printf (contents,
571 " <servicedir>%s</servicedir>\n", dir_path);
574 g_string_append (contents,
575 " <policy context=\"default\">\n"
576 " <!-- Allow everything to be sent -->\n"
577 " <allow send_destination=\"*\" eavesdrop=\"true\"/>\n"
578 " <!-- Allow everything to be received -->\n"
579 " <allow eavesdrop=\"true\"/>\n"
580 " <!-- Allow anyone to own anything -->\n"
581 " <allow own=\"*\"/>\n"
586 g_file_set_contents_full (path, contents->str, contents->len,
587 G_FILE_SET_CONTENTS_NONE,
589 g_assert_no_error (error);
591 g_string_free (contents, TRUE);
597 make_pipe (gint pipe_fds[2],
600 #if defined(G_OS_UNIX)
601 return g_unix_open_pipe (pipe_fds, O_CLOEXEC, error);
602 #elif defined(G_OS_WIN32)
603 if (_pipe (pipe_fds, 4096, _O_BINARY) < 0)
607 g_set_error (error, G_SPAWN_ERROR, G_SPAWN_ERROR_FAILED,
608 _("Failed to create pipe for communicating with child process (%s)"),
614 g_set_error (error, G_SPAWN_ERROR, G_SPAWN_ERROR_FAILED,
615 _("Pipes are not supported in this platform"));
621 start_daemon (GTestDBus *self)
623 const gchar *argv[] = {"dbus-daemon", "--print-address", "--config-file=foo", NULL};
624 gint pipe_fds[2] = {-1, -1};
627 gchar *print_address;
630 GError *error = NULL;
632 if (g_getenv ("G_TEST_DBUS_DAEMON") != NULL)
633 argv[0] = (gchar *)g_getenv ("G_TEST_DBUS_DAEMON");
635 make_pipe (pipe_fds, &error);
636 g_assert_no_error (error);
638 print_address = g_strdup_printf ("--print-address=%d", pipe_fds[1]);
639 argv[1] = print_address;
640 g_assert_no_error (error);
642 /* Write config file and set its path in argv */
643 config_path = write_config_file (self);
644 config_arg = g_strdup_printf ("--config-file=%s", config_path);
645 argv[2] = config_arg;
647 /* Spawn dbus-daemon */
648 g_spawn_async_with_pipes_and_fds (NULL,
651 /* We Need this to get the pid returned on win32 */
652 G_SPAWN_DO_NOT_REAP_CHILD |
653 G_SPAWN_SEARCH_PATH |
654 /* dbus-daemon will not abuse our descriptors, and
655 * passing this means we can use posix_spawn() for speed */
656 G_SPAWN_LEAVE_DESCRIPTORS_OPEN,
659 &pipe_fds[1], &pipe_fds[1], 1,
660 &self->priv->bus_pid,
663 g_assert_no_error (error);
665 _g_test_watcher_add_pid (self->priv->bus_pid);
667 /* Read bus address from pipe */
668 channel = g_io_channel_unix_new (pipe_fds[0]);
670 g_io_channel_set_close_on_unref (channel, TRUE);
671 g_io_channel_read_line (channel, &self->priv->bus_address, NULL,
673 g_assert_no_error (error);
674 self->priv->bus_address[termpos] = '\0';
678 /* start dbus-monitor */
679 if (g_getenv ("G_DBUS_MONITOR") != NULL)
683 command = g_strdup_printf ("dbus-monitor --address %s",
684 self->priv->bus_address);
685 g_spawn_command_line_async (command, NULL);
688 g_usleep (500 * 1000);
692 g_io_channel_shutdown (channel, FALSE, &error);
693 g_assert_no_error (error);
694 g_io_channel_unref (channel);
696 /* Don't use g_file_delete since it calls into gvfs */
697 if (g_unlink (config_path) != 0)
698 g_assert_not_reached ();
700 g_free (print_address);
701 g_free (config_path);
706 stop_daemon (GTestDBus *self)
709 if (!TerminateProcess (self->priv->bus_pid, 0))
710 g_warning ("Can't terminate process: %s", g_win32_error_message (GetLastError()));
712 kill (self->priv->bus_pid, SIGTERM);
714 _g_test_watcher_remove_pid (self->priv->bus_pid);
715 g_spawn_close_pid (self->priv->bus_pid);
716 self->priv->bus_pid = 0;
718 g_free (self->priv->bus_address);
719 self->priv->bus_address = NULL;
724 * @flags: a #GTestDBusFlags
726 * Create a new #GTestDBus object.
728 * Returns: (transfer full): a new #GTestDBus.
731 g_test_dbus_new (GTestDBusFlags flags)
733 return g_object_new (G_TYPE_TEST_DBUS,
739 * g_test_dbus_get_flags:
740 * @self: a #GTestDBus
742 * Get the flags of the #GTestDBus object.
744 * Returns: the value of #GTestDBus:flags property
747 g_test_dbus_get_flags (GTestDBus *self)
749 g_return_val_if_fail (G_IS_TEST_DBUS (self), G_TEST_DBUS_NONE);
751 return self->priv->flags;
755 * g_test_dbus_get_bus_address:
756 * @self: a #GTestDBus
758 * Get the address on which dbus-daemon is running. If g_test_dbus_up() has not
759 * been called yet, %NULL is returned. This can be used with
760 * g_dbus_connection_new_for_address().
762 * Returns: (nullable): the address of the bus, or %NULL.
765 g_test_dbus_get_bus_address (GTestDBus *self)
767 g_return_val_if_fail (G_IS_TEST_DBUS (self), NULL);
769 return self->priv->bus_address;
773 * g_test_dbus_add_service_dir:
774 * @self: a #GTestDBus
775 * @path: path to a directory containing .service files
777 * Add a path where dbus-daemon will look up .service files. This can't be
778 * called after g_test_dbus_up().
781 g_test_dbus_add_service_dir (GTestDBus *self,
784 g_return_if_fail (G_IS_TEST_DBUS (self));
785 g_return_if_fail (self->priv->bus_address == NULL);
787 g_ptr_array_add (self->priv->service_dirs, g_strdup (path));
792 * @self: a #GTestDBus
794 * Start a dbus-daemon instance and set DBUS_SESSION_BUS_ADDRESS. After this
795 * call, it is safe for unit tests to start sending messages on the session bus.
797 * If this function is called from setup callback of g_test_add(),
798 * g_test_dbus_down() must be called in its teardown callback.
800 * If this function is called from unit test's main(), then g_test_dbus_down()
801 * must be called after g_test_run().
804 g_test_dbus_up (GTestDBus *self)
806 g_return_if_fail (G_IS_TEST_DBUS (self));
807 g_return_if_fail (self->priv->bus_address == NULL);
808 g_return_if_fail (!self->priv->up);
812 g_test_dbus_unset ();
813 g_setenv ("DBUS_SESSION_BUS_ADDRESS", self->priv->bus_address, TRUE);
814 self->priv->up = TRUE;
820 * @self: a #GTestDBus
822 * Stop the session bus started by g_test_dbus_up().
824 * Unlike g_test_dbus_down(), this won't verify the #GDBusConnection
825 * singleton returned by g_bus_get() or g_bus_get_sync() is destroyed. Unit
826 * tests wanting to verify behaviour after the session bus has been stopped
827 * can use this function but should still call g_test_dbus_down() when done.
830 g_test_dbus_stop (GTestDBus *self)
832 g_return_if_fail (G_IS_TEST_DBUS (self));
833 g_return_if_fail (self->priv->bus_address != NULL);
840 * @self: a #GTestDBus
842 * Stop the session bus started by g_test_dbus_up().
844 * This will wait for the singleton returned by g_bus_get() or g_bus_get_sync()
845 * to be destroyed. This is done to ensure that the next unit test won't get a
846 * leaked singleton from this test.
849 g_test_dbus_down (GTestDBus *self)
851 GDBusConnection *connection;
853 g_return_if_fail (G_IS_TEST_DBUS (self));
854 g_return_if_fail (self->priv->up);
856 connection = _g_bus_get_singleton_if_exists (G_BUS_TYPE_SESSION);
857 if (connection != NULL)
858 g_dbus_connection_set_exit_on_close (connection, FALSE);
860 if (self->priv->bus_address != NULL)
863 if (connection != NULL)
864 _g_object_unref_and_wait_weak_notify (connection);
866 g_test_dbus_unset ();
867 _g_bus_forget_singleton (G_BUS_TYPE_SESSION);
868 self->priv->up = FALSE;
874 * Unset DISPLAY and DBUS_SESSION_BUS_ADDRESS env variables to ensure the test
875 * won't use user's session bus.
877 * This is useful for unit tests that want to verify behaviour when no session
878 * bus is running. It is not necessary to call this if unit test already calls
879 * g_test_dbus_up() before acquiring the session bus.
882 g_test_dbus_unset (void)
884 g_unsetenv ("DISPLAY");
885 g_unsetenv ("DBUS_SESSION_BUS_ADDRESS");
886 g_unsetenv ("DBUS_STARTER_ADDRESS");
887 g_unsetenv ("DBUS_STARTER_BUS_TYPE");
888 /* avoid using XDG_RUNTIME_DIR/bus */
889 g_unsetenv ("XDG_RUNTIME_DIR");