tests/check/gst/gstbin.c - imx-gstreamer - Git at Google

 /* GStreamer
  * Copyright (C) 2005 Wim Taymans <wim@fluendo.com>
  * Copyright (C) 2005 Thomas Vander Stichele <thomas at apestaart dot org>
  *
  * gstbin.c: Unit test for GstBin
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library 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
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public
  * License along with this library; if not, write to the
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */

 #include <gst/check/gstcheck.h>

 static void
 pop_messages (GstBus * bus, int count)
 {
   GstMessage *message;

   int i;

   GST_DEBUG ("popping %d messages", count);
   for (i = 0; i < count; ++i) {
     fail_unless (gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED, -1)
         == GST_MESSAGE_STATE_CHANGED, "did not get GST_MESSAGE_STATE_CHANGED");

     message = gst_bus_pop (bus);
     gst_message_unref (message);
   }
   GST_DEBUG ("popped %d messages", count);
 }

 GST_START_TEST (test_interface)
 {
   GstBin *bin, *bin2;
   GstElement *filesrc;
   GstIterator *it;
   gpointer item;

   bin = GST_BIN (gst_bin_new (NULL));
   fail_unless (bin != NULL, "Could not create bin");

   filesrc = gst_element_factory_make ("filesrc", NULL);
   fail_unless (filesrc != NULL, "Could not create filesrc");
   fail_unless (GST_IS_URI_HANDLER (filesrc), "Filesrc not a URI handler");
   gst_bin_add (bin, filesrc);

   fail_unless (gst_bin_get_by_interface (bin, GST_TYPE_URI_HANDLER) == filesrc);
   it = gst_bin_iterate_all_by_interface (bin, GST_TYPE_URI_HANDLER);
   fail_unless (it != NULL);
   fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
   fail_unless (item == (gpointer) filesrc);
   fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_DONE);
   gst_iterator_free (it);

   gst_bin_add_many (bin,
       gst_element_factory_make ("identity", NULL),
       gst_element_factory_make ("identity", NULL),
       gst_element_factory_make ("identity", NULL), NULL);
   fail_unless (gst_bin_get_by_interface (bin, GST_TYPE_URI_HANDLER) == filesrc);
   it = gst_bin_iterate_all_by_interface (bin, GST_TYPE_URI_HANDLER);
   fail_unless (it != NULL);
   fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
   fail_unless (item == (gpointer) filesrc);
   fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_DONE);
   gst_iterator_free (it);

   bin2 = bin;
   bin = GST_BIN (gst_bin_new (NULL));
   fail_unless (bin != NULL);
   gst_bin_add_many (bin,
       gst_element_factory_make ("identity", NULL),
       gst_element_factory_make ("identity", NULL),
       GST_ELEMENT (bin2), gst_element_factory_make ("identity", NULL), NULL);
   fail_unless (gst_bin_get_by_interface (bin, GST_TYPE_URI_HANDLER) == filesrc);
   it = gst_bin_iterate_all_by_interface (bin, GST_TYPE_URI_HANDLER);
   fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
   fail_unless (item == (gpointer) filesrc);
   fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_DONE);
   gst_iterator_free (it);

   gst_bin_add (bin, gst_element_factory_make ("filesrc", NULL));
   gst_bin_add (bin2, gst_element_factory_make ("filesrc", NULL));
   it = gst_bin_iterate_all_by_interface (bin, GST_TYPE_URI_HANDLER);
   fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
   fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
   fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
   fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_DONE);
   gst_iterator_free (it);

   gst_object_unref (bin);
 }

 GST_END_TEST;

 GST_START_TEST (test_message_state_changed)
 {
   GstBin *bin;
   GstBus *bus;
   GstMessage *message;

   bin = GST_BIN (gst_bin_new (NULL));
   fail_unless (bin != NULL, "Could not create bin");
   ASSERT_OBJECT_REFCOUNT (bin, "bin", 1);

   bus = GST_ELEMENT_BUS (bin);

   /* change state, spawning a message, causing an incref on the bin */
   gst_element_set_state (GST_ELEMENT (bin), GST_STATE_READY);

   ASSERT_OBJECT_REFCOUNT (bin, "bin", 2);

   /* get and unref the message, causing a decref on the bin */
   fail_unless (gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED,
           -1) == GST_MESSAGE_STATE_CHANGED,
       "did not get GST_MESSAGE_STATE_CHANGED");

   message = gst_bus_pop (bus);
   gst_message_unref (message);

   ASSERT_OBJECT_REFCOUNT (bin, "bin", 1);

   /* clean up */
   gst_object_unref (bin);
 }

 GST_END_TEST;

 GST_START_TEST (test_message_state_changed_child)
 {
   GstBin *bin;
   GstElement *src;
   GstBus *bus;
   GstMessage *message;

   bin = GST_BIN (gst_bin_new (NULL));
   fail_unless (bin != NULL, "Could not create bin");
   ASSERT_OBJECT_REFCOUNT (bin, "bin", 1);

   src = gst_element_factory_make ("fakesrc", NULL);
   fail_if (src == NULL, "Could not create fakesrc");
   gst_bin_add (bin, src);
   ASSERT_OBJECT_REFCOUNT (bin, "bin", 1);
   ASSERT_OBJECT_REFCOUNT (src, "src", 1);

   bus = GST_ELEMENT_BUS (bin);

   /* change state, spawning two messages:
    * - first for fakesrc, forwarded to bin's bus, causing incref on fakesrc
    * - second for bin, causing an incref on the bin */
   GST_DEBUG ("setting bin to READY");
   fail_unless (gst_element_set_state (GST_ELEMENT (bin), GST_STATE_READY)
       == GST_STATE_SUCCESS);

   ASSERT_OBJECT_REFCOUNT (src, "src", 2);
   ASSERT_OBJECT_REFCOUNT (bin, "bin", 2);

   /* get and unref the message, causing a decref on the src */
   fail_unless (gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED, -1)
       == GST_MESSAGE_STATE_CHANGED, "did not get GST_MESSAGE_STATE_CHANGED");

   message = gst_bus_pop (bus);
   fail_unless (GST_MESSAGE_SRC (message) == G_OBJECT (src));
   gst_message_unref (message);

   ASSERT_OBJECT_REFCOUNT (src, "src", 1);
   ASSERT_OBJECT_REFCOUNT (bin, "bin", 2);

   /* get and unref message 2, causing a decref on the bin */
   fail_unless (gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED, -1)
       == GST_MESSAGE_STATE_CHANGED, "did not get GST_MESSAGE_STATE_CHANGED");

   message = gst_bus_pop (bus);
   fail_unless (GST_MESSAGE_SRC (message) == G_OBJECT (bin));
   gst_message_unref (message);

   ASSERT_OBJECT_REFCOUNT (src, "src", 1);
   ASSERT_OBJECT_REFCOUNT (bin, "bin", 1);

   /* clean up */
   gst_object_unref (bin);
 }

 GST_END_TEST;

 GST_START_TEST (test_message_state_changed_children)
 {
   GstPipeline *pipeline;
   GstElement *src, *sink;
   GstBus *bus;

   pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
   fail_unless (pipeline != NULL, "Could not create pipeline");
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

   src = gst_element_factory_make ("fakesrc", NULL);
   fail_if (src == NULL, "Could not create fakesrc");
   /* need to silence the element as the deep_notify refcounts the
    * parents while running */
   g_object_set (G_OBJECT (src), "silent", TRUE, NULL);
   gst_bin_add (GST_BIN (pipeline), src);

   sink = gst_element_factory_make ("fakesink", NULL);
   /* need to silence the element as the deep_notify refcounts the
    * parents while running */
   g_object_set (G_OBJECT (sink), "silent", TRUE, NULL);
   fail_if (sink == NULL, "Could not create fakesink");
   gst_bin_add (GST_BIN (pipeline), sink);

   fail_unless (gst_element_link (src, sink), "could not link src and sink");

   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);
   ASSERT_OBJECT_REFCOUNT (src, "src", 1);
   ASSERT_OBJECT_REFCOUNT (sink, "sink", 1);

   bus = GST_ELEMENT_BUS (pipeline);

   /* change state to READY, spawning three messages */
   GST_DEBUG ("setting pipeline to READY");
   fail_unless (gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_READY)
       == GST_STATE_SUCCESS);

   /* each object is referenced by a message */
   ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
   ASSERT_OBJECT_REFCOUNT (src, "src", 2);
   ASSERT_OBJECT_REFCOUNT (sink, "sink", 2);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 2);

   pop_messages (bus, 3);
   fail_if ((gst_bus_pop (bus)) != NULL);

   ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
   ASSERT_OBJECT_REFCOUNT (src, "src", 1);
   ASSERT_OBJECT_REFCOUNT (sink, "sink", 1);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

   /* change state to PAUSED, spawning three messages */
   GST_DEBUG ("setting pipeline to PAUSED");
   fail_unless (gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PAUSED)
       == GST_STATE_SUCCESS);

   /* each object is referenced by a message;
    * base_sink_chain has taken a refcount on the sink, and is blocked on
    * preroll */
   ASSERT_OBJECT_REFCOUNT (src, "src", 2);
   ASSERT_OBJECT_REFCOUNT (sink, "sink", 3);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 2);

   pop_messages (bus, 3);
   fail_if ((gst_bus_pop (bus)) != NULL);

   ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
   ASSERT_OBJECT_REFCOUNT (src, "src", 1);
   ASSERT_OBJECT_REFCOUNT (sink, "sink", 2);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

   /* change state to PLAYING, spawning three messages */
   GST_DEBUG ("setting pipeline to PLAYING");
   fail_unless (gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING)
       == GST_STATE_SUCCESS);

   /* each object is referenced by one message
    * sink might have an extra reference if it's still blocked on preroll */
   ASSERT_OBJECT_REFCOUNT (src, "src", 2);
   ASSERT_OBJECT_REFCOUNT_BETWEEN (sink, "sink", 2, 3);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 2);

   pop_messages (bus, 3);
   fail_if ((gst_bus_pop (bus)) != NULL);

   ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
   ASSERT_OBJECT_REFCOUNT (src, "src", 1);
   /* sink might have an extra reference if it's still blocked on preroll */
   ASSERT_OBJECT_REFCOUNT_BETWEEN (sink, "sink", 1, 2);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

   /* go back to READY, spawning six messages */
   GST_DEBUG ("setting pipeline to READY");
   fail_unless (gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_READY)
       == GST_STATE_SUCCESS);

   /* each object is referenced by two messages */
   ASSERT_OBJECT_REFCOUNT (src, "src", 3);
   ASSERT_OBJECT_REFCOUNT (sink, "sink", 3);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 3);

   pop_messages (bus, 6);
   fail_if ((gst_bus_pop (bus)) != NULL);

   ASSERT_OBJECT_REFCOUNT (src, "src", 1);
   ASSERT_OBJECT_REFCOUNT (sink, "sink", 1);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

   /* setting pipeline to NULL flushes the bus automatically */
   fail_unless (gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL)
       == GST_STATE_SUCCESS);

   ASSERT_OBJECT_REFCOUNT (src, "src", 1);
   ASSERT_OBJECT_REFCOUNT (sink, "sink", 1);
   ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

   /* clean up */
   gst_object_unref (pipeline);
 }

 GST_END_TEST;

 GST_START_TEST (test_watch_for_state_change)
 {
   GstElement *src, *sink, *bin;
   GstBus *bus;

   bin = gst_element_factory_make ("bin", NULL);
   fail_unless (bin != NULL, "Could not create bin");

   src = gst_element_factory_make ("fakesrc", NULL);
   fail_if (src == NULL, "Could not create fakesrc");
   sink = gst_element_factory_make ("fakesink", NULL);
   fail_if (sink == NULL, "Could not create fakesink");

   gst_bin_add (GST_BIN (bin), sink);
   gst_bin_add (GST_BIN (bin), src);

   fail_unless (gst_element_link (src, sink), "could not link src and sink");

   bus = GST_ELEMENT_BUS (bin);

   /* change state, spawning two times three messages, minus one async */
   fail_unless (gst_element_set_state (GST_ELEMENT (bin), GST_STATE_PAUSED)
       == GST_STATE_ASYNC);

   pop_messages (bus, 5);

   fail_unless (gst_bus_have_pending (bus) == FALSE,
       "Unexpected messages on bus");

   gst_bin_watch_for_state_change (GST_BIN (bin));

   /* should get the bin's state change message now */
   pop_messages (bus, 1);

   fail_unless (gst_bus_have_pending (bus) == FALSE,
       "Unexpected messages on bus");

   fail_unless (gst_element_set_state (GST_ELEMENT (bin), GST_STATE_PLAYING)
       == GST_STATE_SUCCESS);

   pop_messages (bus, 3);

   /* this one might return either SUCCESS or ASYNC, likely SUCCESS */
   gst_element_set_state (GST_ELEMENT (bin), GST_STATE_PAUSED);

   gst_bin_watch_for_state_change (GST_BIN (bin));

   pop_messages (bus, 3);

   fail_unless (gst_bus_have_pending (bus) == FALSE,
       "Unexpected messages on bus");

   /* setting bin to NULL flushes the bus automatically */
   fail_unless (gst_element_set_state (GST_ELEMENT (bin), GST_STATE_NULL)
       == GST_STATE_SUCCESS);

   /* clean up */
   gst_object_unref (bin);
 }

 GST_END_TEST;

 /* adding an element with linked pads to a bin unlinks the
  * pads */
 GST_START_TEST (test_add_linked)
 {
   GstElement *src, *sink;
   GstPad *srcpad, *sinkpad;
   GstElement *pipeline;

   pipeline = gst_pipeline_new (NULL);
   fail_unless (pipeline != NULL, "Could not create pipeline");

   src = gst_element_factory_make ("fakesrc", NULL);
   fail_if (src == NULL, "Could not create fakesrc");
   sink = gst_element_factory_make ("fakesink", NULL);
   fail_if (src == NULL, "Could not create fakesink");

   srcpad = gst_element_get_pad (src, "src");
   fail_unless (srcpad != NULL);
   sinkpad = gst_element_get_pad (sink, "sink");
   fail_unless (sinkpad != NULL);

   fail_unless (gst_pad_link (srcpad, sinkpad) == GST_PAD_LINK_OK);

   /* pads are linked now */
   fail_unless (gst_pad_is_linked (srcpad));
   fail_unless (gst_pad_is_linked (sinkpad));

   /* adding element to bin voids hierarchy so pads are unlinked */
   gst_bin_add (GST_BIN (pipeline), src);

   /* check if pads really are unlinked */
   fail_unless (!gst_pad_is_linked (srcpad));
   fail_unless (!gst_pad_is_linked (sinkpad));

   /* cannot link pads in wrong hierarchy */
   fail_unless (gst_pad_link (srcpad, sinkpad) == GST_PAD_LINK_WRONG_HIERARCHY);

   /* adding other element to bin as well */
   gst_bin_add (GST_BIN (pipeline), sink);

   /* now we can link again */
   fail_unless (gst_pad_link (srcpad, sinkpad) == GST_PAD_LINK_OK);

   /* check if pads really are linked */
   fail_unless (gst_pad_is_linked (srcpad));
   fail_unless (gst_pad_is_linked (sinkpad));

   gst_object_unref (srcpad);
   gst_object_unref (sinkpad);
   gst_object_unref (pipeline);
 }

 GST_END_TEST;

 Suite *
 gst_bin_suite (void)
 {
   Suite *s = suite_create ("GstBin");
   TCase *tc_chain = tcase_create ("bin tests");

   suite_add_tcase (s, tc_chain);
   tcase_add_test (tc_chain, test_interface);
   tcase_add_test (tc_chain, test_message_state_changed);
   tcase_add_test (tc_chain, test_message_state_changed_child);
   tcase_add_test (tc_chain, test_message_state_changed_children);
   tcase_add_test (tc_chain, test_watch_for_state_change);
   tcase_add_test (tc_chain, test_add_linked);

   return s;
 }

 int
 main (int argc, char **argv)
 {
   int nf;

   Suite *s = gst_bin_suite ();
   SRunner *sr = srunner_create (s);

   gst_check_init (&argc, &argv);

   srunner_run_all (sr, CK_NORMAL);
   nf = srunner_ntests_failed (sr);
   srunner_free (sr);

   return nf;
 }
	/* GStreamer
	* Copyright (C) 2005 Wim Taymans <wim@fluendo.com>
	* Copyright (C) 2005 Thomas Vander Stichele <thomas at apestaart dot org>
	*
	* gstbin.c: Unit test for GstBin
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library 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
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public
	* License along with this library; if not, write to the
	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	* Boston, MA 02111-1307, USA.
	*/

	#include <gst/check/gstcheck.h>

	static void
	pop_messages (GstBus * bus, int count)
	{
	GstMessage *message;

	int i;

	GST_DEBUG ("popping %d messages", count);
	for (i = 0; i < count; ++i) {
	fail_unless (gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED, -1)
	== GST_MESSAGE_STATE_CHANGED, "did not get GST_MESSAGE_STATE_CHANGED");

	message = gst_bus_pop (bus);
	gst_message_unref (message);
	}
	GST_DEBUG ("popped %d messages", count);
	}

	GST_START_TEST (test_interface)
	{
	GstBin bin, bin2;
	GstElement *filesrc;
	GstIterator *it;
	gpointer item;

	bin = GST_BIN (gst_bin_new (NULL));
	fail_unless (bin != NULL, "Could not create bin");

	filesrc = gst_element_factory_make ("filesrc", NULL);
	fail_unless (filesrc != NULL, "Could not create filesrc");
	fail_unless (GST_IS_URI_HANDLER (filesrc), "Filesrc not a URI handler");
	gst_bin_add (bin, filesrc);

	fail_unless (gst_bin_get_by_interface (bin, GST_TYPE_URI_HANDLER) == filesrc);
	it = gst_bin_iterate_all_by_interface (bin, GST_TYPE_URI_HANDLER);
	fail_unless (it != NULL);
	fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
	fail_unless (item == (gpointer) filesrc);
	fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_DONE);
	gst_iterator_free (it);

	gst_bin_add_many (bin,
	gst_element_factory_make ("identity", NULL),
	gst_element_factory_make ("identity", NULL),
	gst_element_factory_make ("identity", NULL), NULL);
	fail_unless (gst_bin_get_by_interface (bin, GST_TYPE_URI_HANDLER) == filesrc);
	it = gst_bin_iterate_all_by_interface (bin, GST_TYPE_URI_HANDLER);
	fail_unless (it != NULL);
	fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
	fail_unless (item == (gpointer) filesrc);
	fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_DONE);
	gst_iterator_free (it);

	bin2 = bin;
	bin = GST_BIN (gst_bin_new (NULL));
	fail_unless (bin != NULL);
	gst_bin_add_many (bin,
	gst_element_factory_make ("identity", NULL),
	gst_element_factory_make ("identity", NULL),
	GST_ELEMENT (bin2), gst_element_factory_make ("identity", NULL), NULL);
	fail_unless (gst_bin_get_by_interface (bin, GST_TYPE_URI_HANDLER) == filesrc);
	it = gst_bin_iterate_all_by_interface (bin, GST_TYPE_URI_HANDLER);
	fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
	fail_unless (item == (gpointer) filesrc);
	fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_DONE);
	gst_iterator_free (it);

	gst_bin_add (bin, gst_element_factory_make ("filesrc", NULL));
	gst_bin_add (bin2, gst_element_factory_make ("filesrc", NULL));
	it = gst_bin_iterate_all_by_interface (bin, GST_TYPE_URI_HANDLER);
	fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
	fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
	fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_OK);
	fail_unless (gst_iterator_next (it, &item) == GST_ITERATOR_DONE);
	gst_iterator_free (it);

	gst_object_unref (bin);
	}

	GST_END_TEST;

	GST_START_TEST (test_message_state_changed)
	{
	GstBin *bin;
	GstBus *bus;
	GstMessage *message;

	bin = GST_BIN (gst_bin_new (NULL));
	fail_unless (bin != NULL, "Could not create bin");
	ASSERT_OBJECT_REFCOUNT (bin, "bin", 1);

	bus = GST_ELEMENT_BUS (bin);

	/* change state, spawning a message, causing an incref on the bin */
	gst_element_set_state (GST_ELEMENT (bin), GST_STATE_READY);

	ASSERT_OBJECT_REFCOUNT (bin, "bin", 2);

	/* get and unref the message, causing a decref on the bin */
	fail_unless (gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED,
	-1) == GST_MESSAGE_STATE_CHANGED,
	"did not get GST_MESSAGE_STATE_CHANGED");

	message = gst_bus_pop (bus);
	gst_message_unref (message);

	ASSERT_OBJECT_REFCOUNT (bin, "bin", 1);

	/* clean up */
	gst_object_unref (bin);
	}

	GST_END_TEST;

	GST_START_TEST (test_message_state_changed_child)
	{
	GstBin *bin;
	GstElement *src;
	GstBus *bus;
	GstMessage *message;

	bin = GST_BIN (gst_bin_new (NULL));
	fail_unless (bin != NULL, "Could not create bin");
	ASSERT_OBJECT_REFCOUNT (bin, "bin", 1);

	src = gst_element_factory_make ("fakesrc", NULL);
	fail_if (src == NULL, "Could not create fakesrc");
	gst_bin_add (bin, src);
	ASSERT_OBJECT_REFCOUNT (bin, "bin", 1);
	ASSERT_OBJECT_REFCOUNT (src, "src", 1);

	bus = GST_ELEMENT_BUS (bin);

	/* change state, spawning two messages:
	* - first for fakesrc, forwarded to bin's bus, causing incref on fakesrc
	* - second for bin, causing an incref on the bin */
	GST_DEBUG ("setting bin to READY");
	fail_unless (gst_element_set_state (GST_ELEMENT (bin), GST_STATE_READY)
	== GST_STATE_SUCCESS);

	ASSERT_OBJECT_REFCOUNT (src, "src", 2);
	ASSERT_OBJECT_REFCOUNT (bin, "bin", 2);

	/* get and unref the message, causing a decref on the src */
	fail_unless (gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED, -1)
	== GST_MESSAGE_STATE_CHANGED, "did not get GST_MESSAGE_STATE_CHANGED");

	message = gst_bus_pop (bus);
	fail_unless (GST_MESSAGE_SRC (message) == G_OBJECT (src));
	gst_message_unref (message);

	ASSERT_OBJECT_REFCOUNT (src, "src", 1);
	ASSERT_OBJECT_REFCOUNT (bin, "bin", 2);

	/* get and unref message 2, causing a decref on the bin */
	fail_unless (gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED, -1)
	== GST_MESSAGE_STATE_CHANGED, "did not get GST_MESSAGE_STATE_CHANGED");

	message = gst_bus_pop (bus);
	fail_unless (GST_MESSAGE_SRC (message) == G_OBJECT (bin));
	gst_message_unref (message);

	ASSERT_OBJECT_REFCOUNT (src, "src", 1);
	ASSERT_OBJECT_REFCOUNT (bin, "bin", 1);

	/* clean up */
	gst_object_unref (bin);
	}

	GST_END_TEST;

	GST_START_TEST (test_message_state_changed_children)
	{
	GstPipeline *pipeline;
	GstElement src, sink;
	GstBus *bus;

	pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
	fail_unless (pipeline != NULL, "Could not create pipeline");
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

	src = gst_element_factory_make ("fakesrc", NULL);
	fail_if (src == NULL, "Could not create fakesrc");
	/* need to silence the element as the deep_notify refcounts the
	* parents while running */
	g_object_set (G_OBJECT (src), "silent", TRUE, NULL);
	gst_bin_add (GST_BIN (pipeline), src);

	sink = gst_element_factory_make ("fakesink", NULL);
	/* need to silence the element as the deep_notify refcounts the
	* parents while running */
	g_object_set (G_OBJECT (sink), "silent", TRUE, NULL);
	fail_if (sink == NULL, "Could not create fakesink");
	gst_bin_add (GST_BIN (pipeline), sink);

	fail_unless (gst_element_link (src, sink), "could not link src and sink");

	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);
	ASSERT_OBJECT_REFCOUNT (src, "src", 1);
	ASSERT_OBJECT_REFCOUNT (sink, "sink", 1);

	bus = GST_ELEMENT_BUS (pipeline);

	/* change state to READY, spawning three messages */
	GST_DEBUG ("setting pipeline to READY");
	fail_unless (gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_READY)
	== GST_STATE_SUCCESS);

	/* each object is referenced by a message */
	ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
	ASSERT_OBJECT_REFCOUNT (src, "src", 2);
	ASSERT_OBJECT_REFCOUNT (sink, "sink", 2);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 2);

	pop_messages (bus, 3);
	fail_if ((gst_bus_pop (bus)) != NULL);

	ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
	ASSERT_OBJECT_REFCOUNT (src, "src", 1);
	ASSERT_OBJECT_REFCOUNT (sink, "sink", 1);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

	/* change state to PAUSED, spawning three messages */
	GST_DEBUG ("setting pipeline to PAUSED");
	fail_unless (gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PAUSED)
	== GST_STATE_SUCCESS);

	/* each object is referenced by a message;
	* base_sink_chain has taken a refcount on the sink, and is blocked on
	* preroll */
	ASSERT_OBJECT_REFCOUNT (src, "src", 2);
	ASSERT_OBJECT_REFCOUNT (sink, "sink", 3);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 2);

	pop_messages (bus, 3);
	fail_if ((gst_bus_pop (bus)) != NULL);

	ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
	ASSERT_OBJECT_REFCOUNT (src, "src", 1);
	ASSERT_OBJECT_REFCOUNT (sink, "sink", 2);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

	/* change state to PLAYING, spawning three messages */
	GST_DEBUG ("setting pipeline to PLAYING");
	fail_unless (gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING)
	== GST_STATE_SUCCESS);

	/* each object is referenced by one message
	* sink might have an extra reference if it's still blocked on preroll */
	ASSERT_OBJECT_REFCOUNT (src, "src", 2);
	ASSERT_OBJECT_REFCOUNT_BETWEEN (sink, "sink", 2, 3);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 2);

	pop_messages (bus, 3);
	fail_if ((gst_bus_pop (bus)) != NULL);

	ASSERT_OBJECT_REFCOUNT (bus, "bus", 1);
	ASSERT_OBJECT_REFCOUNT (src, "src", 1);
	/* sink might have an extra reference if it's still blocked on preroll */
	ASSERT_OBJECT_REFCOUNT_BETWEEN (sink, "sink", 1, 2);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

	/* go back to READY, spawning six messages */
	GST_DEBUG ("setting pipeline to READY");
	fail_unless (gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_READY)
	== GST_STATE_SUCCESS);

	/* each object is referenced by two messages */
	ASSERT_OBJECT_REFCOUNT (src, "src", 3);
	ASSERT_OBJECT_REFCOUNT (sink, "sink", 3);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 3);

	pop_messages (bus, 6);
	fail_if ((gst_bus_pop (bus)) != NULL);

	ASSERT_OBJECT_REFCOUNT (src, "src", 1);
	ASSERT_OBJECT_REFCOUNT (sink, "sink", 1);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

	/* setting pipeline to NULL flushes the bus automatically */
	fail_unless (gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL)
	== GST_STATE_SUCCESS);

	ASSERT_OBJECT_REFCOUNT (src, "src", 1);
	ASSERT_OBJECT_REFCOUNT (sink, "sink", 1);
	ASSERT_OBJECT_REFCOUNT (pipeline, "pipeline", 1);

	/* clean up */
	gst_object_unref (pipeline);
	}

	GST_END_TEST;

	GST_START_TEST (test_watch_for_state_change)
	{
	GstElement src, sink, *bin;
	GstBus *bus;

	bin = gst_element_factory_make ("bin", NULL);
	fail_unless (bin != NULL, "Could not create bin");

	src = gst_element_factory_make ("fakesrc", NULL);
	fail_if (src == NULL, "Could not create fakesrc");
	sink = gst_element_factory_make ("fakesink", NULL);
	fail_if (sink == NULL, "Could not create fakesink");

	gst_bin_add (GST_BIN (bin), sink);
	gst_bin_add (GST_BIN (bin), src);

	fail_unless (gst_element_link (src, sink), "could not link src and sink");

	bus = GST_ELEMENT_BUS (bin);

	/* change state, spawning two times three messages, minus one async */
	fail_unless (gst_element_set_state (GST_ELEMENT (bin), GST_STATE_PAUSED)
	== GST_STATE_ASYNC);

	pop_messages (bus, 5);

	fail_unless (gst_bus_have_pending (bus) == FALSE,
	"Unexpected messages on bus");

	gst_bin_watch_for_state_change (GST_BIN (bin));

	/* should get the bin's state change message now */
	pop_messages (bus, 1);

	fail_unless (gst_bus_have_pending (bus) == FALSE,
	"Unexpected messages on bus");

	fail_unless (gst_element_set_state (GST_ELEMENT (bin), GST_STATE_PLAYING)
	== GST_STATE_SUCCESS);

	pop_messages (bus, 3);

	/* this one might return either SUCCESS or ASYNC, likely SUCCESS */
	gst_element_set_state (GST_ELEMENT (bin), GST_STATE_PAUSED);

	gst_bin_watch_for_state_change (GST_BIN (bin));

	pop_messages (bus, 3);

	fail_unless (gst_bus_have_pending (bus) == FALSE,
	"Unexpected messages on bus");

	/* setting bin to NULL flushes the bus automatically */
	fail_unless (gst_element_set_state (GST_ELEMENT (bin), GST_STATE_NULL)
	== GST_STATE_SUCCESS);

	/* clean up */
	gst_object_unref (bin);
	}

	GST_END_TEST;

	/* adding an element with linked pads to a bin unlinks the
	* pads */
	GST_START_TEST (test_add_linked)
	{
	GstElement src, sink;
	GstPad srcpad, sinkpad;
	GstElement *pipeline;

	pipeline = gst_pipeline_new (NULL);
	fail_unless (pipeline != NULL, "Could not create pipeline");

	src = gst_element_factory_make ("fakesrc", NULL);
	fail_if (src == NULL, "Could not create fakesrc");
	sink = gst_element_factory_make ("fakesink", NULL);
	fail_if (src == NULL, "Could not create fakesink");

	srcpad = gst_element_get_pad (src, "src");
	fail_unless (srcpad != NULL);
	sinkpad = gst_element_get_pad (sink, "sink");
	fail_unless (sinkpad != NULL);

	fail_unless (gst_pad_link (srcpad, sinkpad) == GST_PAD_LINK_OK);

	/* pads are linked now */
	fail_unless (gst_pad_is_linked (srcpad));
	fail_unless (gst_pad_is_linked (sinkpad));

	/* adding element to bin voids hierarchy so pads are unlinked */
	gst_bin_add (GST_BIN (pipeline), src);

	/* check if pads really are unlinked */
	fail_unless (!gst_pad_is_linked (srcpad));
	fail_unless (!gst_pad_is_linked (sinkpad));

	/* cannot link pads in wrong hierarchy */
	fail_unless (gst_pad_link (srcpad, sinkpad) == GST_PAD_LINK_WRONG_HIERARCHY);

	/* adding other element to bin as well */
	gst_bin_add (GST_BIN (pipeline), sink);

	/* now we can link again */
	fail_unless (gst_pad_link (srcpad, sinkpad) == GST_PAD_LINK_OK);

	/* check if pads really are linked */
	fail_unless (gst_pad_is_linked (srcpad));
	fail_unless (gst_pad_is_linked (sinkpad));

	gst_object_unref (srcpad);
	gst_object_unref (sinkpad);
	gst_object_unref (pipeline);
	}

	GST_END_TEST;

	Suite *
	gst_bin_suite (void)
	{
	Suite *s = suite_create ("GstBin");
	TCase *tc_chain = tcase_create ("bin tests");

	suite_add_tcase (s, tc_chain);
	tcase_add_test (tc_chain, test_interface);
	tcase_add_test (tc_chain, test_message_state_changed);
	tcase_add_test (tc_chain, test_message_state_changed_child);
	tcase_add_test (tc_chain, test_message_state_changed_children);
	tcase_add_test (tc_chain, test_watch_for_state_change);
	tcase_add_test (tc_chain, test_add_linked);

	return s;
	}

	int
	main (int argc, char **argv)
	{
	int nf;

	Suite *s = gst_bin_suite ();
	SRunner *sr = srunner_create (s);

	gst_check_init (&argc, &argv);

	srunner_run_all (sr, CK_NORMAL);
	nf = srunner_ntests_failed (sr);
	srunner_free (sr);

	return nf;
	}