/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2013, Digium, Inc.
 *
 * Kinsey Moore <kmoore@digium.com>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*!
 * \file
 * \brief CEL unit tests
 *
 * \author Kinsey Moore <kmoore@digium.com>
 *
 */

/*** MODULEINFO
	<depend>TEST_FRAMEWORK</depend>
	<support_level>core</support_level>
 ***/

#include "asterisk.h"

#include <math.h>
#include "asterisk/module.h"
#include "asterisk/test.h"
#include "asterisk/cel.h"
#include "asterisk/channel.h"
#include "asterisk/format_cache.h"
#include "asterisk/linkedlists.h"
#include "asterisk/chanvars.h"
#include "asterisk/utils.h"
#include "asterisk/causes.h"
#include "asterisk/time.h"
#include "asterisk/bridge.h"
#include "asterisk/bridge_basic.h"
#include "asterisk/pickup.h"
#include "asterisk/stasis_channels.h"
#include "asterisk/stasis_bridges.h"
#include "asterisk/json.h"
#include "asterisk/features.h"
#include "asterisk/core_local.h"

#define TEST_CATEGORY "/main/cel/"

#define CHANNEL_TECH_NAME "CELTestChannel"

#define TEST_BACKEND_NAME "CEL Test Logging"

/*! \brief A placeholder for Asterisk's 'real' CEL configuration */
static struct ast_cel_general_config *saved_config;

/*! \brief The CEL config used for CEL unit tests */
static struct ast_cel_general_config *cel_test_config;

/*! \brief Lock used for synchronizing test execution stages with received events */
ast_mutex_t mid_test_sync_lock;

/*! \brief Lock used with sync_out for checking the end of test execution */
ast_mutex_t sync_lock;

/*! \brief Condition used for checking the end of test execution */
ast_cond_t sync_out;

/*! \brief Flag used to trigger a mid-test synchronization, access controlled by mid_test_sync_lock */
int do_mid_test_sync = 0;

/*! \brief A channel technology used for the unit tests */
static struct ast_channel_tech test_cel_chan_tech = {
	.type = CHANNEL_TECH_NAME,
	.description = "Mock channel technology for CEL tests",
};

/*! \brief A 1 second sleep */
static struct timespec to_sleep = {1, 0};

static void do_sleep(void)
{
	while ((nanosleep(&to_sleep, &to_sleep) == -1) && (errno == EINTR)) {
	}
}

#define APPEND_EVENT(chan, ev_type, userevent, extra) do { \
	if (append_expected_event(chan, ev_type, userevent, extra, NULL)) { \
		return AST_TEST_FAIL; \
	} \
	} while (0)

#define APPEND_EVENT_PEER(chan, ev_type, userevent, extra, peer) do { \
	if (append_expected_event(chan, ev_type, userevent, extra, peer)) { \
		return AST_TEST_FAIL; \
	} \
	} while (0)

#define APPEND_EVENT_SNAPSHOT(snapshot, ev_type, userevent, extra, peer) do { \
	if (append_expected_event_snapshot(snapshot, ev_type, userevent, extra, peer)) { \
		return AST_TEST_FAIL; \
	} \
	} while (0)

#define APPEND_DUMMY_EVENT() do { \
	if (append_dummy_event()) { \
		return AST_TEST_FAIL; \
	} \
	} while (0)

#define BRIDGE_EXIT(channel, bridge) do { \
	ast_test_validate(test, !ast_bridge_depart(channel)); \
	BRIDGE_EXIT_EVENT(channel, bridge); \
	mid_test_sync(); \
	} while (0)

#define BRIDGE_EXIT_EVENT(channel, bridge) do { \
	RAII_VAR(struct ast_str *, peer_str, NULL, ast_free); \
	peer_str = test_cel_generate_peer_str(channel, bridge); \
	ast_test_validate(test, peer_str != NULL); \
	BRIDGE_EXIT_EVENT_PEER(channel, bridge, ast_str_buffer(peer_str)); \
	} while (0)

#define BRIDGE_EXIT_EVENT_PEER(channel, bridge, peer) do { \
	RAII_VAR(struct ast_json *, extra, NULL, ast_json_unref); \
	extra = ast_json_pack("{s: s, s: s}", "bridge_id", bridge->uniqueid, "bridge_technology", bridge->technology->name); \
	ast_test_validate(test, extra != NULL); \
	APPEND_EVENT_PEER(channel, AST_CEL_BRIDGE_EXIT, NULL, extra, peer); \
	} while (0)

#define BRIDGE_EXIT_SNAPSHOT(channel, bridge) do { \
	RAII_VAR(struct ast_json *, extra, NULL, ast_json_unref); \
	RAII_VAR(struct ast_str *, peer_str, NULL, ast_free); \
	peer_str = test_cel_generate_peer_str_snapshot(channel, bridge); \
	ast_test_validate(test, peer_str != NULL); \
	extra = ast_json_pack("{s: s, s: s}", "bridge_id", bridge->uniqueid, "bridge_technology", bridge->technology->name); \
	ast_test_validate(test, extra != NULL); \
	APPEND_EVENT_SNAPSHOT(channel, AST_CEL_BRIDGE_EXIT, NULL, extra, ast_str_buffer(peer_str)); \
	} while (0)

#define BRIDGE_ENTER(channel, bridge) do { \
	ast_test_validate(test, !ast_bridge_impart(bridge, channel, NULL, NULL, AST_BRIDGE_IMPART_CHAN_DEPARTABLE)); \
	do_sleep(); \
	BRIDGE_ENTER_EVENT(channel, bridge); \
	mid_test_sync(); \
	} while (0)

#define BRIDGE_ENTER_EVENT(channel, bridge) do { \
	RAII_VAR(struct ast_str *, peer_str, NULL, ast_free); \
	peer_str = test_cel_generate_peer_str(channel, bridge); \
	ast_test_validate(test, peer_str != NULL); \
	BRIDGE_ENTER_EVENT_PEER(channel, bridge, ast_str_buffer(peer_str)); \
	} while (0)

#define BRIDGE_ENTER_EVENT_PEER(channel, bridge, peer) do { \
	RAII_VAR(struct ast_json *, extra, NULL, ast_json_unref); \
	extra = ast_json_pack("{s: s, s: s}", "bridge_id", bridge->uniqueid, "bridge_technology", bridge->technology->name); \
	ast_test_validate(test, extra != NULL); \
	APPEND_EVENT_PEER(channel, AST_CEL_BRIDGE_ENTER, NULL, extra, peer); \
	} while (0)

#define BLINDTRANSFER_EVENT(channel, bridge, extension, context) do { \
	RAII_VAR(struct ast_json *, extra, NULL, ast_json_unref); \
	extra = ast_json_pack("{s: s, s: s, s: s, s: s, s: s}", \
		"extension", extension, \
		"context", context, \
		"bridge_id", bridge->uniqueid, \
		"transferee_channel_name", "N/A", \
		"transferee_channel_uniqueid", "N/A"); \
	ast_test_validate(test, extra != NULL); \
	APPEND_EVENT(channel, AST_CEL_BLINDTRANSFER, NULL, extra); \
	} while (0)

#define ATTENDEDTRANSFER_BRIDGE(channel1, bridge1, channel2, bridge2, channel3, channel4) do { \
	RAII_VAR(struct ast_json *, extra, NULL, ast_json_unref); \
	extra = ast_json_pack("{s: s, s: s, s: s, s: s, s: s, s: s, s: s, s: s}", \
		"bridge1_id", bridge1->uniqueid, \
		"channel2_name", ast_channel_name(channel2), \
		"channel2_uniqueid", ast_channel_uniqueid(channel2), \
		"bridge2_id", bridge2->uniqueid, \
		"transferee_channel_name", ast_channel_name(channel4), \
		"transferee_channel_uniqueid", ast_channel_uniqueid(channel4), \
		"transfer_target_channel_name", ast_channel_name(channel3), \
		"transfer_target_channel_uniqueid", ast_channel_uniqueid(channel3)); \
	ast_test_validate(test, extra != NULL); \
	APPEND_EVENT(channel1, AST_CEL_ATTENDEDTRANSFER, NULL, extra); \
	} while (0)

/*! \brief Alice's Caller ID */
#define ALICE_CALLERID { .id.name.str = "Alice", .id.name.valid = 1, .id.number.str = "100", .id.number.valid = 1, }

/*! \brief Bob's Caller ID */
#define BOB_CALLERID { .id.name.str = "Bob", .id.name.valid = 1, .id.number.str = "200", .id.number.valid = 1, }

/*! \brief Charlie's Caller ID */
#define CHARLIE_CALLERID { .id.name.str = "Charlie", .id.name.valid = 1, .id.number.str = "300", .id.number.valid = 1, }

/*! \brief David's Caller ID */
#define DAVID_CALLERID { .id.name.str = "David", .id.name.valid = 1, .id.number.str = "400", .id.number.valid = 1, }

/*! \brief Set ulaw format on channel */
#define SET_FORMATS(chan) do {\
	struct ast_format_cap *caps;\
	caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);\
	ast_format_cap_append(caps, ast_format_ulaw, 0);\
	ast_channel_nativeformats_set((chan), caps);\
	ast_channel_set_writeformat((chan), ast_format_ulaw);\
	ast_channel_set_rawwriteformat((chan), ast_format_ulaw);\
	ast_channel_set_readformat((chan), ast_format_ulaw);\
	ast_channel_set_rawreadformat((chan), ast_format_ulaw);\
	ao2_ref(caps, -1);\
} while (0)

/*! \brief Create a \ref test_cel_chan_tech for Alice. */
#define CREATE_ALICE_CHANNEL(channel_var, caller_id) do { \
	(channel_var) = ast_channel_alloc(0, AST_STATE_DOWN, (caller_id)->id.number.str, (caller_id)->id.name.str, "100", "100", "default", NULL, NULL, 0, CHANNEL_TECH_NAME "/Alice"); \
	SET_FORMATS((channel_var));\
	APPEND_EVENT(channel_var, AST_CEL_CHANNEL_START, NULL, NULL); \
	ast_channel_unlock((channel_var)); \
	} while (0)

/*! \brief Create a \ref test_cel_chan_tech for Bob. */
#define CREATE_BOB_CHANNEL(channel_var, caller_id) do { \
	(channel_var) = ast_channel_alloc(0, AST_STATE_DOWN, (caller_id)->id.number.str, (caller_id)->id.name.str, "200", "200", "default", NULL, NULL, 0, CHANNEL_TECH_NAME "/Bob"); \
	SET_FORMATS((channel_var));\
	APPEND_EVENT(channel_var, AST_CEL_CHANNEL_START, NULL, NULL); \
	ast_channel_unlock((channel_var)); \
	} while (0)

/*! \brief Create a \ref test_cel_chan_tech for Charlie. */
#define CREATE_CHARLIE_CHANNEL(channel_var, caller_id) do { \
	(channel_var) = ast_channel_alloc(0, AST_STATE_DOWN, (caller_id)->id.number.str, (caller_id)->id.name.str, "300", "300", "default", NULL, NULL, 0, CHANNEL_TECH_NAME "/Charlie"); \
	SET_FORMATS((channel_var));\
	APPEND_EVENT(channel_var, AST_CEL_CHANNEL_START, NULL, NULL); \
	ast_channel_unlock((channel_var)); \
	} while (0)

/*! \brief Create a \ref test_cel_chan_tech for David. */
#define CREATE_DAVID_CHANNEL(channel_var, caller_id) do { \
	(channel_var) = ast_channel_alloc(0, AST_STATE_DOWN, (caller_id)->id.number.str, (caller_id)->id.name.str, "400", "400", "default", NULL, NULL, 0, CHANNEL_TECH_NAME "/David"); \
	SET_FORMATS((channel_var));\
	APPEND_EVENT(channel_var, AST_CEL_CHANNEL_START, NULL, NULL); \
	ast_channel_unlock((channel_var)); \
	} while (0)

/*! \brief Emulate a channel entering into an application */
#define EMULATE_APP_DATA(channel, priority, application, data) do { \
	if ((priority) > 0) { \
		ast_channel_priority_set((channel), (priority)); \
	} \
	ast_channel_appl_set((channel), (application)); \
	ast_channel_data_set((channel), (data)); \
	ast_channel_publish_snapshot((channel)); \
	} while (0)

#define ANSWER_CHANNEL(chan) do { \
	EMULATE_APP_DATA(chan, 1, "Answer", ""); \
	ANSWER_NO_APP(chan); \
	} while (0)

#define ANSWER_NO_APP(chan) do { \
	ast_setstate(chan, AST_STATE_UP); \
	APPEND_EVENT(chan, AST_CEL_ANSWER, NULL, NULL); \
	} while (0)

/*! \brief Hang up a test channel safely */
#define HANGUP_CHANNEL(channel, cause, dialstatus) do { \
	ast_channel_hangupcause_set((channel), (cause)); \
	ao2_ref(channel, +1); \
	ast_hangup((channel)); \
	HANGUP_EVENT(channel, cause, dialstatus); \
	APPEND_EVENT(channel, AST_CEL_CHANNEL_END, NULL, NULL); \
	ao2_cleanup(stasis_cache_get(ast_channel_cache(), \
		ast_channel_snapshot_type(), ast_channel_uniqueid(channel))); \
	ao2_cleanup(channel); \
	channel = NULL; \
	} while (0)

#define HANGUP_EVENT(channel, cause, dialstatus) do { \
	RAII_VAR(struct ast_json *, extra, NULL, ast_json_unref); \
	extra = ast_json_pack("{s: i, s: s, s: s}", \
		"hangupcause", cause, \
		"hangupsource", "", \
		"dialstatus", dialstatus); \
	ast_test_validate(test, extra != NULL); \
	APPEND_EVENT(channel, AST_CEL_HANGUP, NULL, extra); \
	} while (0)

static void mid_test_sync(void);

static int append_expected_event(
	struct ast_channel *chan,
	enum ast_cel_event_type type,
	const char *userdefevname,
	struct ast_json *extra,
	const char *peer);

static int append_expected_event_snapshot(
	struct ast_channel_snapshot *snapshot,
	enum ast_cel_event_type type,
	const char *userdefevname,
	struct ast_json *extra,
	const char *peer);

#ifdef RACEY_TESTS
static int append_dummy_event(void);
#endif

static struct ast_str *__test_cel_generate_peer_str(struct ast_channel_snapshot *chan, struct ast_bridge_snapshot *bridge)
{
	struct ast_str *peer_str = ast_str_create(32);
	struct ao2_iterator i;
	char *current_chan = NULL;

	if (!peer_str) {
		return NULL;
	}

	for (i = ao2_iterator_init(bridge->channels, 0);
		(current_chan = ao2_iterator_next(&i));
		ao2_cleanup(current_chan)) {
		RAII_VAR(struct ast_channel_snapshot *, current_snapshot,
			NULL,
			ao2_cleanup);

		/* Don't add the channel for which this message is being generated */
		if (!strcmp(current_chan, chan->uniqueid)) {
			continue;
		}

		current_snapshot = ast_channel_snapshot_get_latest(current_chan);
		if (!current_snapshot) {
			continue;
		}

		ast_str_append(&peer_str, 0, "%s,", current_snapshot->name);
	}
	ao2_iterator_destroy(&i);

	/* Rip off the trailing comma */
	ast_str_truncate(peer_str, -1);

	return peer_str;
}

static struct ast_str *test_cel_generate_peer_str_snapshot(struct ast_channel_snapshot *chan, struct ast_bridge *bridge)
{
	RAII_VAR(struct ast_bridge_snapshot *, snapshot,
		ast_bridge_snapshot_get_latest(bridge->uniqueid),
		ao2_cleanup);

	if (!snapshot) {
		return NULL;
	}

	return __test_cel_generate_peer_str(chan, snapshot);
}

static struct ast_str *test_cel_generate_peer_str(struct ast_channel *chan, struct ast_bridge *bridge)
{
	RAII_VAR(struct ast_channel_snapshot *, snapshot,
		ast_channel_snapshot_get_latest(ast_channel_uniqueid(chan)),
		ao2_cleanup);

	if (!snapshot) {
		return NULL;
	}

	return test_cel_generate_peer_str_snapshot(snapshot, bridge);
}

static void safe_channel_release(struct ast_channel *chan)
{
	if (!chan) {
		return;
	}
	ast_channel_release(chan);
}

static void safe_bridge_destroy(struct ast_bridge *bridge)
{
	if (!bridge) {
		return;
	}
	ast_bridge_destroy(bridge, 0);
}

AST_TEST_DEFINE(test_cel_channel_creation)
{
	RAII_VAR(struct ast_channel *, chan, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test the CEL records created when a channel is created";
		info->description =
			"Test the CEL records created when a channel is created";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan, (&caller));

	HANGUP_CHANNEL(chan, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_unanswered_inbound_call)
{
	RAII_VAR(struct ast_channel *, chan, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test inbound unanswered calls";
		info->description =
			"Test CEL records for a call that is\n"
			"inbound to Asterisk, executes some dialplan, but\n"
			"is never answered.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan, &caller);

	EMULATE_APP_DATA(chan, 1, "Wait", "1");

	HANGUP_CHANNEL(chan, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_unanswered_outbound_call)
{
	RAII_VAR(struct ast_channel *, chan, NULL, safe_channel_release);
	struct ast_party_caller caller = {
			.id.name.str = "",
			.id.name.valid = 1,
			.id.number.str = "",
			.id.number.valid = 1, };

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test outbound unanswered calls";
		info->description =
			"Test CEL records for a call that is\n"
			"outbound to Asterisk but is never answered.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan, &caller);

	ast_channel_exten_set(chan, "s");
	ast_channel_context_set(chan, "default");
	ast_set_flag(ast_channel_flags(chan), AST_FLAG_ORIGINATED);
	EMULATE_APP_DATA(chan, 0, "AppDial", "(Outgoing Line)");
	HANGUP_CHANNEL(chan, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_single_party)
{
	RAII_VAR(struct ast_channel *, chan, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a single party";
		info->description =
			"Test CEL records for a call that is\n"
			"answered, but only involves a single channel";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	CREATE_ALICE_CHANNEL(chan, &caller);

	ANSWER_CHANNEL(chan);
	EMULATE_APP_DATA(chan, 2, "VoiceMailMain", "1");

	HANGUP_CHANNEL(chan, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_single_bridge)
{
	RAII_VAR(struct ast_channel *, chan, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge, NULL, safe_bridge_destroy);

	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a single party entering/leaving a bridge";
		info->description =
			"Test CEL records for a call that is\n"
			"answered, enters a bridge, and leaves it.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	bridge = ast_bridge_basic_new();
	ast_test_validate(test, bridge != NULL);

	CREATE_ALICE_CHANNEL(chan, &caller);

	ANSWER_CHANNEL(chan);
	EMULATE_APP_DATA(chan, 2, "Bridge", "");

	do_sleep();
	BRIDGE_ENTER(chan, bridge);

	do_sleep();

	BRIDGE_EXIT(chan, bridge);

	HANGUP_CHANNEL(chan, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_single_bridge_continue)
{
	RAII_VAR(struct ast_channel *, chan, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge, NULL, safe_bridge_destroy);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a single party entering/leaving a bridge";
		info->description =
			"Test CEL records for a call that is\n"
			"answered, enters a bridge, and leaves it.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	bridge = ast_bridge_basic_new();
	ast_test_validate(test, bridge != NULL);

	CREATE_ALICE_CHANNEL(chan, &caller);

	ANSWER_CHANNEL(chan);
	EMULATE_APP_DATA(chan, 2, "Bridge", "");

	do_sleep();
	BRIDGE_ENTER(chan, bridge);

	do_sleep();

	BRIDGE_EXIT(chan, bridge);

	EMULATE_APP_DATA(chan, 3, "Wait", "");

	/* And then it hangs up */
	HANGUP_CHANNEL(chan, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_single_twoparty_bridge_a)
{
	RAII_VAR(struct ast_channel *, chan_alice, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_bob, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge, NULL, safe_bridge_destroy);
	struct ast_party_caller caller_alice = ALICE_CALLERID;
	struct ast_party_caller caller_bob = BOB_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a single party entering/leaving a bridge";
		info->description =
			"Test CEL records for a call that is\n"
			"answered, enters a bridge, and leaves it. In this scenario, the\n"
			"Party A should answer the bridge first.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	bridge = ast_bridge_basic_new();
	ast_test_validate(test, bridge != NULL);

	CREATE_ALICE_CHANNEL(chan_alice, &caller_alice);

	CREATE_BOB_CHANNEL(chan_bob, &caller_bob);

	ANSWER_CHANNEL(chan_alice);
	EMULATE_APP_DATA(chan_alice, 2, "Bridge", "");

	BRIDGE_ENTER(chan_alice, bridge);
	do_sleep();

	ANSWER_CHANNEL(chan_bob);
	EMULATE_APP_DATA(chan_bob, 2, "Bridge", "");

	BRIDGE_ENTER(chan_bob, bridge);

	BRIDGE_EXIT(chan_alice, bridge);
	BRIDGE_EXIT(chan_bob, bridge);

	HANGUP_CHANNEL(chan_alice, AST_CAUSE_NORMAL, "");
	HANGUP_CHANNEL(chan_bob, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_single_twoparty_bridge_b)
{
	RAII_VAR(struct ast_channel *, chan_alice, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_bob, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge, NULL, safe_bridge_destroy);
	struct ast_party_caller caller_alice = ALICE_CALLERID;
	struct ast_party_caller caller_bob = BOB_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a single party entering/leaving a bridge";
		info->description =
			"Test CEL records for a call that is\n"
			"answered, enters a bridge, and leaves it. In this scenario, the\n"
			"Party B should answer the bridge first.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	bridge = ast_bridge_basic_new();
	ast_test_validate(test, bridge != NULL);

	CREATE_ALICE_CHANNEL(chan_alice, &caller_alice);

	CREATE_BOB_CHANNEL(chan_bob, &caller_bob);

	ANSWER_CHANNEL(chan_alice);
	EMULATE_APP_DATA(chan_alice, 2, "Bridge", "");

	ANSWER_CHANNEL(chan_bob);
	EMULATE_APP_DATA(chan_bob, 2, "Bridge", "");
	do_sleep();

	BRIDGE_ENTER(chan_bob, bridge);

	BRIDGE_ENTER(chan_alice, bridge);

	BRIDGE_EXIT(chan_alice, bridge);
	BRIDGE_EXIT(chan_bob, bridge);

	HANGUP_CHANNEL(chan_alice, AST_CAUSE_NORMAL, "");
	HANGUP_CHANNEL(chan_bob, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

/* XXX Validation needs to be reworked on a per-channel basis before
 * test_cel_single_multiparty_bridge and test_cel_dial_answer_multiparty
 * can operate properly. */
#ifdef RACEY_TESTS
AST_TEST_DEFINE(test_cel_single_multiparty_bridge)
{
	RAII_VAR(struct ast_channel *, chan_alice, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_bob, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_charlie, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge, NULL, safe_bridge_destroy);
	struct ast_party_caller caller_alice = ALICE_CALLERID;
	struct ast_party_caller caller_bob = BOB_CALLERID;
	struct ast_party_caller caller_charlie = CHARLIE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a single party entering/leaving a multi-party bridge";
		info->description =
			"Test CEL records for a call that is\n"
			"answered, enters a bridge, and leaves it. A total of three\n"
			"parties perform this action.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	bridge = ast_bridge_basic_new();
	ast_test_validate(test, bridge != NULL);

	CREATE_ALICE_CHANNEL(chan_alice, &caller_alice);
	CREATE_BOB_CHANNEL(chan_bob, &caller_bob);
	CREATE_CHARLIE_CHANNEL(chan_charlie, &caller_charlie);

	ANSWER_CHANNEL(chan_alice);
	EMULATE_APP_DATA(chan_alice, 2, "Bridge", "");

	do_sleep();

	BRIDGE_ENTER(chan_alice, bridge);

	ANSWER_CHANNEL(chan_bob);
	EMULATE_APP_DATA(chan_bob, 2, "Bridge", "");
	do_sleep();

	BRIDGE_ENTER(chan_bob, bridge);

	ANSWER_CHANNEL(chan_charlie);
	EMULATE_APP_DATA(chan_charlie, 2, "Bridge", "");
	do_sleep();
	BRIDGE_ENTER(chan_charlie, bridge);

	BRIDGE_EXIT(chan_alice, bridge);
	BRIDGE_EXIT(chan_bob, bridge);
	BRIDGE_EXIT(chan_charlie, bridge);

	HANGUP_CHANNEL(chan_alice, AST_CAUSE_NORMAL, "");
	HANGUP_CHANNEL(chan_bob, AST_CAUSE_NORMAL, "");
	HANGUP_CHANNEL(chan_charlie, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}
#endif

#define EMULATE_DIAL(channel, dialstring) do { \
	EMULATE_APP_DATA(channel, 1, "Dial", dialstring); \
	if (append_expected_event(channel, AST_CEL_APP_START, NULL, NULL, NULL)) { \
		return AST_TEST_FAIL; \
	} \
	} while (0)

#define START_DIALED(caller, callee) \
	START_DIALED_FULL(caller, callee, "200", "Bob")

#define START_DIALED_FULL(caller, callee, number, name) do { \
	callee = ast_channel_alloc(0, AST_STATE_DOWN, NULL, NULL, number, NULL, NULL, NULL, caller, 0, CHANNEL_TECH_NAME "/" name); \
	SET_FORMATS(callee);\
	ast_channel_unlock(callee); \
	if (append_expected_event(callee, AST_CEL_CHANNEL_START, NULL, NULL, NULL)) { \
		return AST_TEST_FAIL; \
	} \
	ast_set_flag(ast_channel_flags(callee), AST_FLAG_OUTGOING); \
	EMULATE_APP_DATA(callee, 0, "AppDial", "(Outgoing Line)"); \
	ast_channel_publish_dial(caller, callee, name, NULL); \
	} while (0)

AST_TEST_DEFINE(test_cel_dial_unanswered)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_callee, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a dial that isn't answered";
		info->description =
			"Test CEL records for a channel that\n"
			"performs a dial operation that isn't answered";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_caller, chan_callee);

	ast_channel_state_set(chan_caller, AST_STATE_RINGING);
	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "NOANSWER");

	HANGUP_CHANNEL(chan_caller, AST_CAUSE_NO_ANSWER, "NOANSWER");
	HANGUP_CHANNEL(chan_callee, AST_CAUSE_NO_ANSWER, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_dial_unanswered_filter)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_callee, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a dial that isn't answered";
		info->description =
			"Test CEL records for a channel that\n"
			"performs a dial operation that isn't answered";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_caller, chan_callee);

	ast_channel_state_set(chan_caller, AST_STATE_RINGING);
	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "NOT A VALID DIAL STATUS");
	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "NOANSWER");

	HANGUP_CHANNEL(chan_caller, AST_CAUSE_NO_ANSWER, "NOANSWER");
	HANGUP_CHANNEL(chan_callee, AST_CAUSE_NO_ANSWER, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_dial_busy)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_callee, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a dial that results in a busy";
		info->description =
			"Test CEL records for a channel that\n"
			"performs a dial operation to an endpoint that's busy";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_caller, chan_callee);

	ast_channel_state_set(chan_caller, AST_STATE_RINGING);
	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "BUSY");

	HANGUP_CHANNEL(chan_caller, AST_CAUSE_BUSY, "BUSY");
	HANGUP_CHANNEL(chan_callee, AST_CAUSE_BUSY, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_dial_congestion)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_callee, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a dial that results in congestion";
		info->description =
			"Test CEL records for a channel that\n"
			"performs a dial operation to an endpoint that's congested";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_caller, chan_callee);

	ast_channel_state_set(chan_caller, AST_STATE_RINGING);
	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "CONGESTION");

	HANGUP_CHANNEL(chan_caller, AST_CAUSE_CONGESTION, "CONGESTION");
	HANGUP_CHANNEL(chan_callee, AST_CAUSE_CONGESTION, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_dial_unavailable)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_callee, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a dial that results in unavailable";
		info->description =
			"Test CEL records for a channel that\n"
			"performs a dial operation to an endpoint that's unavailable";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_caller, chan_callee);

	ast_channel_state_set(chan_caller, AST_STATE_RINGING);
	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "CHANUNAVAIL");

	HANGUP_CHANNEL(chan_caller, AST_CAUSE_NO_ROUTE_DESTINATION, "CHANUNAVAIL");
	HANGUP_CHANNEL(chan_callee, AST_CAUSE_NO_ROUTE_DESTINATION, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_dial_caller_cancel)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_callee, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test CEL for a dial where the caller cancels";
		info->description =
			"Test CEL records for a channel that\n"
			"performs a dial operation to an endpoint but then decides\n"
			"to hang up, cancelling the dial";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_caller, chan_callee);

	ast_channel_state_set(chan_caller, AST_STATE_RINGING);
	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "CANCEL");

	HANGUP_CHANNEL(chan_callee, AST_CAUSE_NORMAL, "");
	HANGUP_CHANNEL(chan_caller, AST_CAUSE_NORMAL, "CANCEL");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_dial_parallel_failed)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_bob, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_charlie, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_david, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test a parallel dial where all channels fail to answer";
		info->description =
			"This tests dialing three parties: Bob, Charlie, David. Charlie\n"
			"returns BUSY; David returns CONGESTION; Bob fails to answer and\n"
			"Alice hangs up. Three records are created for Alice as a result.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	/* Channel enters Dial app */
	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob&" CHANNEL_TECH_NAME "/Charlie&" CHANNEL_TECH_NAME "/David");

	/* Outbound channels are created */
	START_DIALED_FULL(chan_caller, chan_bob, "200", "Bob");
	START_DIALED_FULL(chan_caller, chan_charlie, "300", "Charlie");
	START_DIALED_FULL(chan_caller, chan_david, "400", "David");

	/* Dial starts */
	ast_channel_state_set(chan_caller, AST_STATE_RINGING);

	/* Charlie is busy */
	ast_channel_publish_dial(chan_caller, chan_charlie, NULL, "BUSY");
	HANGUP_CHANNEL(chan_charlie, AST_CAUSE_BUSY, "");

	/* David is congested */
	ast_channel_publish_dial(chan_caller, chan_david, NULL, "CONGESTION");
	HANGUP_CHANNEL(chan_david, AST_CAUSE_CONGESTION, "");

	/* Bob is canceled */
	ast_channel_publish_dial(chan_caller, chan_bob, NULL, "CANCEL");
	HANGUP_CHANNEL(chan_bob, AST_CAUSE_NORMAL, "");

	/* Alice hangs up */
	HANGUP_CHANNEL(chan_caller, AST_CAUSE_NORMAL, "BUSY");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_dial_answer_no_bridge)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_callee, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test dialing, answering, and not going into a bridge.";
		info->description =
			"This is a weird one, but theoretically possible. You can perform\n"
			"a dial, then bounce both channels to different priorities and\n"
			"never have them enter a bridge together. Ew. This makes sure that\n"
			"when we answer, we get a CEL, it gets ended at that point, and\n"
			"that it gets finalized appropriately.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_caller, chan_callee);

	ast_channel_state_set(chan_caller, AST_STATE_RINGING);
	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "ANSWER");

	ANSWER_NO_APP(chan_caller);
	ast_clear_flag(ast_channel_flags(chan_callee), AST_FLAG_OUTGOING);
	ANSWER_NO_APP(chan_callee);

	EMULATE_APP_DATA(chan_caller, 2, "Wait", "1");
	EMULATE_APP_DATA(chan_callee, 1, "Wait", "1");

	HANGUP_CHANNEL(chan_caller, AST_CAUSE_NORMAL, "ANSWER");
	HANGUP_CHANNEL(chan_callee, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_dial_answer_twoparty_bridge_a)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_callee, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge, NULL, safe_bridge_destroy);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test dialing, answering, and going into a 2-party bridge";
		info->description =
			"The most 'basic' of scenarios";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	bridge = ast_bridge_basic_new();
	ast_test_validate(test, bridge != NULL);

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_caller, chan_callee);

	ast_channel_state_set(chan_caller, AST_STATE_RINGING);
	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "ANSWER");

	ANSWER_NO_APP(chan_caller);
	ANSWER_NO_APP(chan_callee);

	do_sleep();

	BRIDGE_ENTER(chan_caller, bridge);
	BRIDGE_ENTER(chan_callee, bridge);

	BRIDGE_EXIT(chan_caller, bridge);
	BRIDGE_EXIT(chan_callee, bridge);

	HANGUP_CHANNEL(chan_caller, AST_CAUSE_NORMAL, "ANSWER");
	HANGUP_CHANNEL(chan_callee, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_dial_answer_twoparty_bridge_b)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_callee, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge, NULL, safe_bridge_destroy);
	struct ast_party_caller caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test dialing, answering, and going into a 2-party bridge";
		info->description =
			"The most 'basic' of scenarios";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	bridge = ast_bridge_basic_new();
	ast_test_validate(test, bridge != NULL);

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_caller, chan_callee);

	ast_channel_state_set(chan_caller, AST_STATE_RINGING);
	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "ANSWER");

	ANSWER_NO_APP(chan_caller);
	ANSWER_NO_APP(chan_callee);

	do_sleep();
	BRIDGE_ENTER(chan_callee, bridge);
	BRIDGE_ENTER(chan_caller, bridge);

	BRIDGE_EXIT(chan_caller, bridge);
	BRIDGE_EXIT(chan_callee, bridge);

	HANGUP_CHANNEL(chan_caller, AST_CAUSE_NORMAL, "ANSWER");
	HANGUP_CHANNEL(chan_callee, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

#ifdef RACEY_TESTS
AST_TEST_DEFINE(test_cel_dial_answer_multiparty)
{
	RAII_VAR(struct ast_channel *, chan_alice, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_bob, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_charlie, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_david, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge, NULL, safe_bridge_destroy);
	struct ast_party_caller alice_caller = ALICE_CALLERID;
	struct ast_party_caller charlie_caller = CHARLIE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test dialing, answering, and going into a multi-party bridge";
		info->description =
			"A little tricky to get to do, but possible with some redirects.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	bridge = ast_bridge_basic_new();
	ast_test_validate(test, bridge != NULL);

	CREATE_ALICE_CHANNEL(chan_alice, &alice_caller);

	EMULATE_DIAL(chan_alice, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_alice, chan_bob);
	do_sleep();

	CREATE_CHARLIE_CHANNEL(chan_charlie, &charlie_caller);
	do_sleep();
	EMULATE_DIAL(chan_charlie, CHANNEL_TECH_NAME "/Bob");
	do_sleep();

	START_DIALED_FULL(chan_charlie, chan_david, "400", "David");

	ast_channel_state_set(chan_alice, AST_STATE_RINGING);
	do_sleep();
	ast_channel_state_set(chan_charlie, AST_STATE_RINGING);
	do_sleep();
	ast_channel_publish_dial(chan_alice, chan_bob, NULL, "ANSWER");
	do_sleep();
	ast_channel_publish_dial(chan_charlie, chan_david, NULL, "ANSWER");
	do_sleep();

	ANSWER_NO_APP(chan_alice);
	do_sleep();
	ANSWER_NO_APP(chan_bob);
	do_sleep();
	ANSWER_NO_APP(chan_charlie);
	do_sleep();
	ANSWER_NO_APP(chan_david);
	do_sleep();

	do_sleep();
	BRIDGE_ENTER(chan_charlie, bridge);
	BRIDGE_ENTER(chan_david, bridge);
	BRIDGE_ENTER(chan_bob, bridge);
	BRIDGE_ENTER(chan_alice, bridge);

	BRIDGE_EXIT(chan_alice, bridge);
	BRIDGE_EXIT(chan_bob, bridge);
	BRIDGE_EXIT(chan_charlie, bridge);
	BRIDGE_EXIT(chan_david, bridge);

	HANGUP_CHANNEL(chan_alice, AST_CAUSE_NORMAL, "ANSWER");
	HANGUP_CHANNEL(chan_bob, AST_CAUSE_NORMAL, "");
	HANGUP_CHANNEL(chan_charlie, AST_CAUSE_NORMAL, "ANSWER");
	HANGUP_CHANNEL(chan_david, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}
#endif

AST_TEST_DEFINE(test_cel_blind_transfer)
{
	RAII_VAR(struct ast_channel *, chan_alice, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_bob, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge, NULL, safe_bridge_destroy);
	RAII_VAR(struct ast_blind_transfer_message *, transfer_msg, NULL, ao2_cleanup);
	struct ast_party_caller alice_caller = ALICE_CALLERID;
	struct ast_party_caller bob_caller = BOB_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test blind transfers to an extension";
		info->description =
			"This test creates two channels, bridges them, and then"
			" blind transfers the bridge to an extension.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	bridge = ast_bridge_basic_new();
	ast_test_validate(test, bridge != NULL);

	CREATE_ALICE_CHANNEL(chan_alice, &alice_caller);
	CREATE_BOB_CHANNEL(chan_bob, &bob_caller);

	ANSWER_NO_APP(chan_alice);
	ANSWER_NO_APP(chan_bob);

	BRIDGE_ENTER(chan_bob, bridge);
	BRIDGE_ENTER(chan_alice, bridge);

	ast_bridge_lock(bridge);
	transfer_msg = ast_blind_transfer_message_create(1, chan_alice,
			"transfer_extension", "transfer_context");
	if (!transfer_msg) {
		ast_bridge_unlock(bridge);
		ast_test_status_update(test, "Failed to create transfer Stasis message\n");
		return AST_TEST_FAIL;
	}
	transfer_msg->bridge = ast_bridge_snapshot_create(bridge);
	if (!transfer_msg->bridge) {
		ast_bridge_unlock(bridge);
		ast_test_status_update(test, "Failed to create bridge snapshot\n");
		return AST_TEST_FAIL;
	}
	ast_bridge_unlock(bridge);
	transfer_msg->result = AST_BRIDGE_TRANSFER_SUCCESS;
	ast_bridge_publish_blind_transfer(transfer_msg);
	BLINDTRANSFER_EVENT(chan_alice, bridge, "transfer_extension", "transfer_context");

	BRIDGE_EXIT(chan_alice, bridge);
	BRIDGE_EXIT(chan_bob, bridge);

	HANGUP_CHANNEL(chan_alice, AST_CAUSE_NORMAL, "");
	do_sleep();
	HANGUP_CHANNEL(chan_bob, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

/* XXX Validation needs to take into account the BRIDGE_EXIT for Alice and the
 * ATTENDEDTRANSFER message are not guaranteed to be ordered
 */
#ifdef RACEY_TESTS
AST_TEST_DEFINE(test_cel_attended_transfer_bridges_swap)
{
	RAII_VAR(struct ast_channel *, chan_alice, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_bob, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_charlie, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_david, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge1, NULL, safe_bridge_destroy);
	RAII_VAR(struct ast_bridge *, bridge2, NULL, safe_bridge_destroy);
	struct ast_party_caller alice_caller = ALICE_CALLERID;
	struct ast_party_caller bob_caller = BOB_CALLERID;
	struct ast_party_caller charlie_caller = CHARLIE_CALLERID;
	struct ast_party_caller david_caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test attended transfers between two pairs of bridged parties";
		info->description =
			"This test creates four channels, places each pair in"
			" a bridge, and then attended transfers the bridges"
			" together.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	/* Create first set of bridged parties */
	bridge1 = ast_bridge_basic_new();
	ast_test_validate(test, bridge1 != NULL);

	CREATE_ALICE_CHANNEL(chan_alice, &alice_caller);
	CREATE_BOB_CHANNEL(chan_bob, &bob_caller);
	ANSWER_NO_APP(chan_alice);
	ANSWER_NO_APP(chan_bob);

	BRIDGE_ENTER(chan_bob, bridge1);
	BRIDGE_ENTER(chan_alice, bridge1);

	/* Create second set of bridged parties */
	bridge2 = ast_bridge_basic_new();
	ast_test_validate(test, bridge2 != NULL);

	CREATE_DAVID_CHANNEL(chan_david, &david_caller);
	CREATE_CHARLIE_CHANNEL(chan_charlie, &charlie_caller);
	ANSWER_NO_APP(chan_david);
	ANSWER_NO_APP(chan_charlie);

	BRIDGE_ENTER(chan_charlie, bridge2);

	BRIDGE_ENTER(chan_david, bridge2);
	BRIDGE_EXIT_EVENT(chan_bob, bridge1);
	do_sleep();

	/* Perform attended transfer */
	if (ast_bridge_transfer_attended(chan_alice, chan_david)) {
		ast_test_status_update(test, "Attended transfer failed!\n");
		return AST_TEST_FAIL;
	}
	do_sleep();
	BRIDGE_ENTER_EVENT_PEER(chan_bob, bridge2, "CELTestChannel/David,CELTestChannel/Charlie");

	BRIDGE_EXIT_EVENT(chan_david, bridge2);
	BRIDGE_EXIT_EVENT(chan_alice, bridge1);
	ATTENDEDTRANSFER_BRIDGE(chan_alice, bridge1, chan_david, bridge2, chan_charlie, chan_bob);

	do_sleep();
	BRIDGE_EXIT(chan_bob, bridge2);
	BRIDGE_EXIT(chan_charlie, bridge2);

	HANGUP_CHANNEL(chan_alice, AST_CAUSE_NORMAL, "");
	do_sleep();
	HANGUP_CHANNEL(chan_bob, AST_CAUSE_NORMAL, "");
	do_sleep();
	HANGUP_CHANNEL(chan_david, AST_CAUSE_NORMAL, "");
	do_sleep();
	HANGUP_CHANNEL(chan_charlie, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}
#endif

AST_TEST_DEFINE(test_cel_attended_transfer_bridges_merge)
{
	RAII_VAR(struct ast_channel *, chan_alice, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_bob, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_charlie, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_david, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge1, NULL, safe_bridge_destroy);
	RAII_VAR(struct ast_bridge *, bridge2, NULL, safe_bridge_destroy);
	struct ast_party_caller alice_caller = ALICE_CALLERID;
	struct ast_party_caller bob_caller = BOB_CALLERID;
	struct ast_party_caller charlie_caller = CHARLIE_CALLERID;
	struct ast_party_caller david_caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test attended transfers between two pairs of"
			" bridged parties that results in a bridge merge";
		info->description =
			"This test creates four channels, places each pair"
			" in a bridge, and then attended transfers the bridges"
			" together causing a bridge merge.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	/* Create first set of bridged parties */
	bridge1 = ast_bridge_base_new(AST_BRIDGE_CAPABILITY_1TO1MIX | AST_BRIDGE_CAPABILITY_NATIVE | AST_BRIDGE_CAPABILITY_MULTIMIX,
		AST_BRIDGE_FLAG_SWAP_INHIBIT_FROM | AST_BRIDGE_FLAG_TRANSFER_PROHIBITED | AST_BRIDGE_FLAG_SMART,
		"test_cel", "test_cel_atxfer_bridges_merge_1", NULL);
	ast_test_validate(test, bridge1 != NULL);

	CREATE_ALICE_CHANNEL(chan_alice, &alice_caller);
	CREATE_BOB_CHANNEL(chan_bob, &bob_caller);
	ANSWER_NO_APP(chan_alice);
	ANSWER_NO_APP(chan_bob);

	BRIDGE_ENTER(chan_bob, bridge1);
	BRIDGE_ENTER(chan_alice, bridge1);

	/* Create second set of bridged parties */
	bridge2 = ast_bridge_base_new(AST_BRIDGE_CAPABILITY_1TO1MIX | AST_BRIDGE_CAPABILITY_NATIVE | AST_BRIDGE_CAPABILITY_MULTIMIX,
		AST_BRIDGE_FLAG_SWAP_INHIBIT_FROM | AST_BRIDGE_FLAG_TRANSFER_PROHIBITED | AST_BRIDGE_FLAG_SMART,
		"test_cel", "test_cel_atxfer_bridges_merge_2", NULL);
	ast_test_validate(test, bridge2 != NULL);

	CREATE_DAVID_CHANNEL(chan_david, &david_caller);
	CREATE_CHARLIE_CHANNEL(chan_charlie, &charlie_caller);
	ANSWER_NO_APP(chan_david);
	ANSWER_NO_APP(chan_charlie);

	BRIDGE_ENTER(chan_charlie, bridge2);

	BRIDGE_ENTER(chan_david, bridge2);

	/* Perform attended transfer */
	if (ast_bridge_transfer_attended(chan_alice, chan_david)) {
		ast_test_status_update(test, "Attended transfer failed!\n");
		return AST_TEST_FAIL;
	}
	do_sleep();
	BRIDGE_EXIT_EVENT_PEER(chan_charlie, bridge2, "CELTestChannel/David");
	BRIDGE_ENTER_EVENT_PEER(chan_charlie, bridge1, "CELTestChannel/Bob,CELTestChannel/Alice");
	BRIDGE_EXIT_EVENT(chan_david, bridge2);
	BRIDGE_EXIT_EVENT(chan_alice, bridge1);

	ATTENDEDTRANSFER_BRIDGE(chan_alice, bridge1, chan_david, bridge2, chan_charlie, chan_bob);

	do_sleep();
	BRIDGE_EXIT(chan_bob, bridge1);
	BRIDGE_EXIT(chan_charlie, bridge1);

	HANGUP_CHANNEL(chan_alice, AST_CAUSE_NORMAL, "");
	do_sleep();
	HANGUP_CHANNEL(chan_bob, AST_CAUSE_NORMAL, "");
	do_sleep();
	HANGUP_CHANNEL(chan_david, AST_CAUSE_NORMAL, "");
	do_sleep();
	HANGUP_CHANNEL(chan_charlie, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

/* XXX Validation needs to take into account the BRIDGE_EXIT for David and the
 * ATTENDEDTRANSFER message are not guaranteed to be ordered
 */
#ifdef RACEY_TESTS
AST_TEST_DEFINE(test_cel_attended_transfer_bridges_link)
{
	RAII_VAR(struct ast_channel *, chan_alice, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_bob, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_charlie, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_david, NULL, safe_channel_release);
	RAII_VAR(struct ast_bridge *, bridge1, NULL, safe_bridge_destroy);
	RAII_VAR(struct ast_bridge *, bridge2, NULL, safe_bridge_destroy);
	struct ast_party_caller alice_caller = ALICE_CALLERID;
	struct ast_party_caller bob_caller = BOB_CALLERID;
	struct ast_party_caller charlie_caller = CHARLIE_CALLERID;
	struct ast_party_caller david_caller = ALICE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test attended transfers between two pairs of"
			" bridged parties that results in a bridge merge";
		info->description =
			"This test creates four channels, places each pair"
			" in a bridge, and then attended transfers the bridges"
			" together causing a bridge link.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}
	/* Create first set of bridged parties */
	bridge1 = ast_bridge_base_new(AST_BRIDGE_CAPABILITY_1TO1MIX | AST_BRIDGE_CAPABILITY_NATIVE | AST_BRIDGE_CAPABILITY_MULTIMIX,
		AST_BRIDGE_FLAG_MERGE_INHIBIT_TO | AST_BRIDGE_FLAG_MERGE_INHIBIT_FROM
		| AST_BRIDGE_FLAG_SWAP_INHIBIT_TO | AST_BRIDGE_FLAG_SWAP_INHIBIT_FROM
		| AST_BRIDGE_FLAG_TRANSFER_PROHIBITED | AST_BRIDGE_FLAG_SMART,
		"test_cel", "test_cel_atxfer_bridges_link_1", NULL);
	ast_test_validate(test, bridge1 != NULL);

	CREATE_ALICE_CHANNEL(chan_alice, &alice_caller);
	CREATE_BOB_CHANNEL(chan_bob, &bob_caller);
	ANSWER_NO_APP(chan_alice);
	ANSWER_NO_APP(chan_bob);

	BRIDGE_ENTER(chan_bob, bridge1);
	BRIDGE_ENTER(chan_alice, bridge1);

	/* Create second set of bridged parties */
	bridge2 = ast_bridge_base_new(AST_BRIDGE_CAPABILITY_1TO1MIX | AST_BRIDGE_CAPABILITY_NATIVE | AST_BRIDGE_CAPABILITY_MULTIMIX,
		AST_BRIDGE_FLAG_MERGE_INHIBIT_TO | AST_BRIDGE_FLAG_MERGE_INHIBIT_FROM
		| AST_BRIDGE_FLAG_SWAP_INHIBIT_TO | AST_BRIDGE_FLAG_SWAP_INHIBIT_FROM
		| AST_BRIDGE_FLAG_TRANSFER_PROHIBITED | AST_BRIDGE_FLAG_SMART,
		"test_cel", "test_cel_atxfer_bridges_link_2", NULL);
	ast_test_validate(test, bridge2 != NULL);

	CREATE_DAVID_CHANNEL(chan_david, &david_caller);
	CREATE_CHARLIE_CHANNEL(chan_charlie, &charlie_caller);
	ANSWER_NO_APP(chan_david);
	ANSWER_NO_APP(chan_charlie);

	BRIDGE_ENTER(chan_charlie, bridge2);
	BRIDGE_ENTER(chan_david, bridge2);

	/* Perform attended transfer */
	ATTENDEDTRANSFER_BRIDGE(chan_alice, bridge1, chan_david, bridge2, chan_charlie, chan_bob);

	ast_bridge_transfer_attended(chan_alice, chan_david);
	do_sleep();

	/* BRIDGE_EXIT alice and david */
	APPEND_DUMMY_EVENT();
	APPEND_DUMMY_EVENT();

	do_sleep();
	BRIDGE_EXIT(chan_bob, bridge1);
	BRIDGE_EXIT(chan_charlie, bridge2);

	HANGUP_CHANNEL(chan_alice, AST_CAUSE_NORMAL, "");
	do_sleep();
	HANGUP_CHANNEL(chan_bob, AST_CAUSE_NORMAL, "");
	do_sleep();
	HANGUP_CHANNEL(chan_david, AST_CAUSE_NORMAL, "");
	do_sleep();
	HANGUP_CHANNEL(chan_charlie, AST_CAUSE_NORMAL, "");
	do_sleep();

	return AST_TEST_PASS;
}
#endif

AST_TEST_DEFINE(test_cel_dial_pickup)
{
	RAII_VAR(struct ast_channel *, chan_caller, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_callee, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_charlie, NULL, safe_channel_release);
	struct ast_party_caller caller = ALICE_CALLERID;
	struct ast_party_caller charlie_caller = CHARLIE_CALLERID;

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test call pickup";
		info->description =
			"Test CEL records for a call that is\n"
			"inbound to Asterisk, executes some dialplan, and\n"
			"is picked up.";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	CREATE_ALICE_CHANNEL(chan_caller, &caller);

	EMULATE_DIAL(chan_caller, CHANNEL_TECH_NAME "/Bob");

	START_DIALED(chan_caller, chan_callee);

	ast_channel_state_set(chan_caller, AST_STATE_RINGING);

	CREATE_CHARLIE_CHANNEL(chan_charlie, &charlie_caller);

	{
		RAII_VAR(struct ast_json *, extra, NULL, ast_json_unref);
		SCOPED_CHANNELLOCK(lock, chan_callee);

		extra = ast_json_pack("{s: s, s: s}", "pickup_channel", ast_channel_name(chan_charlie),
			"pickup_channel_uniqueid", ast_channel_uniqueid(chan_charlie));
		ast_test_validate(test, extra != NULL);

		APPEND_EVENT(chan_callee, AST_CEL_PICKUP, NULL, extra);
		ast_test_validate(test, !ast_do_pickup(chan_charlie, chan_callee));
	}

	/* Hang up the masqueraded zombie */
	HANGUP_CHANNEL(chan_charlie, AST_CAUSE_NORMAL, "");

	ast_channel_publish_dial(chan_caller, chan_callee, NULL, "ANSWER");

	HANGUP_CHANNEL(chan_caller, AST_CAUSE_NORMAL, "ANSWER");
	HANGUP_CHANNEL(chan_callee, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

AST_TEST_DEFINE(test_cel_local_optimize)
{
	RAII_VAR(struct ast_channel *, chan_alice, NULL, safe_channel_release);
	RAII_VAR(struct ast_channel *, chan_bob, NULL, safe_channel_release);
	struct ast_party_caller alice_caller = ALICE_CALLERID;
	struct ast_party_caller bob_caller = BOB_CALLERID;
	RAII_VAR(struct ast_multi_channel_blob *, mc_blob, NULL, ao2_cleanup);
	RAII_VAR(struct ast_channel_snapshot *, alice_snapshot, NULL, ao2_cleanup);
	RAII_VAR(struct ast_channel_snapshot *, bob_snapshot, NULL, ao2_cleanup);
	RAII_VAR(struct stasis_message *, local_opt_begin, NULL, ao2_cleanup);
	RAII_VAR(struct stasis_message *, local_opt_end, NULL, ao2_cleanup);
	RAII_VAR(struct ast_json *, extra, NULL, ast_json_unref);

	switch (cmd) {
	case TEST_INIT:
		info->name = __func__;
		info->category = TEST_CATEGORY;
		info->summary = "Test local channel optimization record generation";
		info->description =
			"Test CEL records for two local channels being optimized\n"
			"out by sending a messages indicating local optimization\n"
			"begin and end";
		return AST_TEST_NOT_RUN;
	case TEST_EXECUTE:
		break;
	}

	mc_blob = ast_multi_channel_blob_create(ast_json_null());
	ast_test_validate(test, mc_blob != NULL);

	CREATE_ALICE_CHANNEL(chan_alice, &alice_caller);
	CREATE_BOB_CHANNEL(chan_bob, &bob_caller);

	ast_channel_lock(chan_alice);
	alice_snapshot = ast_channel_snapshot_create(chan_alice);
	ast_channel_unlock(chan_alice);
	ast_test_validate(test, alice_snapshot != NULL);

	ast_channel_lock(chan_bob);
	bob_snapshot = ast_channel_snapshot_create(chan_bob);
	ast_channel_unlock(chan_bob);
	ast_test_validate(test, bob_snapshot != NULL);

	ast_multi_channel_blob_add_channel(mc_blob, "1", alice_snapshot);
	ast_multi_channel_blob_add_channel(mc_blob, "2", bob_snapshot);

	local_opt_begin = stasis_message_create(ast_local_optimization_begin_type(), mc_blob);
	ast_test_validate(test, local_opt_begin != NULL);

	local_opt_end = stasis_message_create(ast_local_optimization_end_type(), mc_blob);
	ast_test_validate(test, local_opt_end != NULL);

	stasis_publish(ast_channel_topic(chan_alice), local_opt_begin);
	stasis_publish(ast_channel_topic(chan_alice), local_opt_end);

	extra = ast_json_pack("{s: s, s: s}", "local_two", bob_snapshot->name,
		"local_two_uniqueid", bob_snapshot->uniqueid);
	ast_test_validate(test, extra != NULL);

	APPEND_EVENT_SNAPSHOT(alice_snapshot, AST_CEL_LOCAL_OPTIMIZE, NULL, extra, NULL);

	HANGUP_CHANNEL(chan_alice, AST_CAUSE_NORMAL, "");
	HANGUP_CHANNEL(chan_bob, AST_CAUSE_NORMAL, "");

	return AST_TEST_PASS;
}

/*! Container for astobj2 duplicated ast_events */
static struct ao2_container *cel_received_events = NULL;

/*! Container for expected CEL events */
static struct ao2_container *cel_expected_events = NULL;

static struct ast_event *ao2_dup_event(const struct ast_event *event)
{
	struct ast_event *event_dup;
	uint16_t event_len;

	event_len = ast_event_get_size(event);

	event_dup = ao2_alloc(event_len, NULL);
	if (!event_dup) {
		return NULL;
	}

	memcpy(event_dup, event, event_len);

	return event_dup;
}

static void mid_test_sync(void)
{
	ast_mutex_lock(&mid_test_sync_lock);
	if (ao2_container_count(cel_expected_events) <= ao2_container_count(cel_received_events)) {
		ast_mutex_unlock(&mid_test_sync_lock);
		return;
	}

	do_mid_test_sync = 1;
	ast_mutex_unlock(&mid_test_sync_lock);

	{
		struct timeval start = ast_tvnow();
		struct timespec end = {
			.tv_sec = start.tv_sec + 15,
			.tv_nsec = start.tv_usec * 1000
		};

		SCOPED_MUTEX(lock, &sync_lock);
		ast_cond_timedwait(&sync_out, &sync_lock, &end);
	}
}

static int append_event(struct ast_event *ev)
{
	RAII_VAR(struct ast_event *, ao2_ev, NULL, ao2_cleanup);
	ao2_ev = ao2_dup_event(ev);
	if (!ao2_ev) {
		return -1;
	}

	ao2_link(cel_expected_events, ao2_ev);
	return 0;
}

#ifdef RACEY_TESTS
static int append_dummy_event(void)
{
	RAII_VAR(struct ast_event *, ev, NULL, ast_free);
	RAII_VAR(struct ast_event *, ao2_ev, NULL, ao2_cleanup);

	ev = ast_event_new(AST_EVENT_CUSTOM, AST_EVENT_IE_END);
	if (!ev) {
		return -1;
	}

	return append_event(ev);
}
#endif

static int append_expected_event_snapshot(
	struct ast_channel_snapshot *snapshot,
	enum ast_cel_event_type type,
	const char *userdefevname,
	struct ast_json *extra,
	const char *peer)
{
	RAII_VAR(struct ast_event *, ev, NULL, ast_free);
	ev = ast_cel_create_event(snapshot, type, userdefevname, extra, peer);
	if (!ev) {
		return -1;
	}

	return append_event(ev);
}

static int append_expected_event(
	struct ast_channel *chan,
	enum ast_cel_event_type type,
	const char *userdefevname,
	struct ast_json *extra,
	const char *peer)
{
	RAII_VAR(struct ast_channel_snapshot *, snapshot, NULL, ao2_cleanup);
	ast_channel_lock(chan);
	snapshot = ast_channel_snapshot_create(chan);
	ast_channel_unlock(chan);
	if (!snapshot) {
		return -1;
	}

	return append_expected_event_snapshot(snapshot, type, userdefevname, extra, peer);
}

static void test_sub(struct ast_event *event)
{
	struct ast_event *event_dup = ao2_dup_event(event);
	const char *chan_name;
	SCOPED_MUTEX(mid_test_lock, &mid_test_sync_lock);

	if (!event_dup) {
		return;
	}

	chan_name = ast_event_get_ie_str(event_dup, AST_EVENT_IE_CEL_CHANNAME);
	if (chan_name && strncmp(chan_name, CHANNEL_TECH_NAME, 14)) {
		return;
	}

	/* save the event for later processing */
	ao2_link(cel_received_events, event_dup);

	if (do_mid_test_sync) {
		int expected = ao2_container_count(cel_expected_events);
		int received = ao2_container_count(cel_received_events);
		if (expected <= received) {
			{
			SCOPED_MUTEX(lock, &sync_lock);
			ast_cond_signal(&sync_out);
			do_mid_test_sync = 0;
			}
		}
	}
}

/*!
 * \internal
 * \brief Callback function called before each test executes
 */
static int test_cel_init_cb(struct ast_test_info *info, struct ast_test *test)
{
	ast_assert(cel_received_events == NULL);
	ast_assert(cel_expected_events == NULL);

	ast_mutex_init(&mid_test_sync_lock);
	ast_mutex_init(&sync_lock);
	ast_cond_init(&sync_out, NULL);

	/* Back up the real CEL config and insert the test's config */
	saved_config = ast_cel_get_config();
	ast_cel_set_config(cel_test_config);

	/* init CEL event storage (degenerate hash table becomes a linked list) */
	cel_received_events = ao2_container_alloc(1, NULL, NULL);
	cel_expected_events = ao2_container_alloc(1, NULL, NULL);

	/* start the CEL event callback */
	if (ast_cel_backend_register(TEST_BACKEND_NAME, test_sub)) {
		return -1;
	}
	return 0;
}

/*!
 * \brief Check two peer strings for equality
 *
 * \retval zero if the peer strings do not match
 * \retval non-zero if the peer strings match
 */
static int test_cel_peer_strings_match(const char *str1, const char *str2)
{
	struct ao2_container *intersection = ast_str_container_alloc(11);
	RAII_VAR(char *, str1_dup, ast_strdup(str1), ast_free);
	RAII_VAR(char *, str2_dup, ast_strdup(str2), ast_free);
	char *chan;

	while ((chan = strsep(&str1_dup, ","))) {
		ast_str_container_add(intersection, chan);
	}

	while ((chan = strsep(&str2_dup, ","))) {
		RAII_VAR(char *, ao2_chan, ao2_find(intersection, chan, OBJ_SEARCH_KEY), ao2_cleanup);

		/* item in str2 not in str1 */
		if (!ao2_chan) {
			return 0;
		}

		ast_str_container_remove(intersection, chan);
	}

	/* item in str1 not in str2 */
	if (ao2_container_count(intersection)) {
		return 0;
	}

	return 1;
}

/*!
 * \brief Check an IE value from two events
 *
 * \retval zero if the IEs in the events of the specified type do not match
 * \retval non-zero if the IEs in the events of the specified type match
 */
static int match_ie_val(
	const struct ast_event *event1,
	const struct ast_event *event2,
	enum ast_event_ie_type type)
{
	enum ast_event_ie_pltype pltype = ast_event_get_ie_pltype(type);

	/* XXX ignore sec/usec for now */
	if (type == AST_EVENT_IE_CEL_EVENT_TIME_USEC) {
		return 1;
	}

	if (type == AST_EVENT_IE_CEL_EVENT_TIME) {
		return 1;
	}

	switch (pltype) {
	case AST_EVENT_IE_PLTYPE_UINT:
	{
		uint32_t val = ast_event_get_ie_uint(event2, type);

		return (val == ast_event_get_ie_uint(event1, type)) ? 1 : 0;
	}
	case AST_EVENT_IE_PLTYPE_STR:
	{
		const char *str1 = ast_event_get_ie_str(event1, type);
		const char *str2 = ast_event_get_ie_str(event2, type);

		if (!str1 && !str2) {
			return 1;
		} else if (!str1) {
			return 0;
		} else if (!str2) {
			return 0;
		}

		/* use special matching for CEL PEER field */
		if (type == AST_EVENT_IE_CEL_PEER) {
			return test_cel_peer_strings_match(str1, str2);
		}

		return !strcmp(str1, str2);
	}
	case AST_EVENT_IE_PLTYPE_RAW:
	case AST_EVENT_IE_PLTYPE_BITFLAGS:
		/* Fall through: just pass on these types */
		return 1;
	default:
		break;
	}
	return 0;
}

static int events_are_equal(struct ast_test *test, struct ast_event *received, struct ast_event *expected)
{
	struct ast_event_iterator iterator;
	int res;

	if (ast_event_get_type(expected) == AST_EVENT_CUSTOM) {
		/* this event is flagged as a wildcard match */
		return 1;
	}

	for (res = ast_event_iterator_init(&iterator, received); !res; res = ast_event_iterator_next(&iterator)) {
		int ie_type = ast_event_iterator_get_ie_type(&iterator);
		if (!match_ie_val(received, expected, ie_type)) {
			ast_test_status_update(test, "Failed matching on field %s\n", ast_event_get_ie_type_name(ie_type));
			return 0;
		}
	}

	return 1;
}

static int dump_event(struct ast_test *test, struct ast_event *event)
{
	struct ast_event_iterator i;

	if (ast_event_iterator_init(&i, event)) {
		ast_test_status_update(test, "Failed to initialize event iterator.  :-(\n");
		return 0;
	}

	ast_test_status_update(test, "Event: %s\n",
		ast_cel_get_type_name(ast_event_get_ie_uint(event, AST_EVENT_IE_CEL_EVENT_TYPE)));

	do {
		enum ast_event_ie_type ie_type;
		enum ast_event_ie_pltype ie_pltype;
		const char *ie_type_name;

		ie_type = ast_event_iterator_get_ie_type(&i);
		ie_type_name = ast_event_get_ie_type_name(ie_type);
		ie_pltype = ast_event_get_ie_pltype(ie_type);

		switch (ie_pltype) {
		case AST_EVENT_IE_PLTYPE_UNKNOWN:
		case AST_EVENT_IE_PLTYPE_STR:
			ast_test_status_update(test, "%.30s: %s\n", ie_type_name,
					ast_event_iterator_get_ie_str(&i));
			break;
		case AST_EVENT_IE_PLTYPE_UINT:
			ast_test_status_update(test, "%.30s: %u\n", ie_type_name,
					ast_event_iterator_get_ie_uint(&i));
			break;
		default:
			break;
		}
	} while (!ast_event_iterator_next(&i));

	ast_test_status_update(test, "\n");

	return 0;
}

static int check_events(struct ast_test *test, struct ao2_container *local_expected, struct ao2_container *local_received)
{
	struct ao2_iterator received_it;
	struct ao2_iterator expected_it;
	RAII_VAR(struct ast_event *, rx_event, NULL, ao2_cleanup);
	RAII_VAR(struct ast_event *, ex_event, NULL, ao2_cleanup);
	int debug = 0;

	if (ao2_container_count(local_expected) != ao2_container_count(local_received)) {
		ast_test_status_update(test, "Increasing verbosity since the number of expected events (%d)"
			" did not match number of received events (%d).\n",
			ao2_container_count(local_expected),
			ao2_container_count(local_received));
		debug = 1;
	}

	received_it = ao2_iterator_init(local_received, 0);
	expected_it = ao2_iterator_init(local_expected, 0);
	rx_event = ao2_iterator_next(&received_it);
	ex_event = ao2_iterator_next(&expected_it);
	while (rx_event && ex_event) {
		if (!events_are_equal(test, rx_event, ex_event)) {
			ao2_iterator_destroy(&received_it);
			ao2_iterator_destroy(&expected_it);
			ast_test_status_update(test, "Received event:\n");
			dump_event(test, rx_event);
			ast_test_status_update(test, "Expected event:\n");
			dump_event(test, ex_event);
			return -1;
		}
		if (debug) {
			ast_test_status_update(test, "Compared events successfully%s\n",
				ast_event_get_type(ex_event) == AST_EVENT_CUSTOM
					? " (wildcard match)" : "");
			dump_event(test, rx_event);
		}
		ao2_cleanup(rx_event);
		ao2_cleanup(ex_event);
		rx_event = ao2_iterator_next(&received_it);
		ex_event = ao2_iterator_next(&expected_it);
	}
	ao2_iterator_destroy(&received_it);
	ao2_iterator_destroy(&expected_it);

	if (rx_event) {
		ast_test_status_update(test, "Received event:\n");
		dump_event(test, rx_event);
		return -1;
	}
	if (ex_event) {
		ast_test_status_update(test, "Expected event:\n");
		dump_event(test, ex_event);
		return -1;
	}
	return 0;
}

/*!
 * \internal
 * \brief Callback function called after each test executes.
 *
 * \details
 * In addition to cleanup, this function also performs verification
 * that the events received during a test match the events that were
 * expected to have been generated during the test.
 */
static int cel_verify_and_cleanup_cb(struct ast_test_info *info, struct ast_test *test)
{
	RAII_VAR(struct ao2_container *, local_expected, cel_expected_events, ao2_cleanup);
	RAII_VAR(struct ao2_container *, local_received, cel_received_events, ao2_cleanup);
	ast_assert(cel_received_events != NULL);
	ast_assert(cel_expected_events != NULL);

	do_sleep();

	/* stop the CEL event callback and clean up storage structures*/
	ast_cel_backend_unregister(TEST_BACKEND_NAME);

	/* cleaned up by RAII_VAR's */
	cel_expected_events = NULL;
	cel_received_events = NULL;

	/* check events */
	ast_test_validate(test, !check_events(test, local_expected, local_received));

	/* Restore the real CEL config */
	ast_cel_set_config(saved_config);
	ao2_cleanup(saved_config);
	saved_config = NULL;

	/* clean up the locks */
	ast_mutex_destroy(&sync_lock);
	ast_mutex_destroy(&mid_test_sync_lock);
	ast_cond_destroy(&sync_out);
	return 0;
}

static int unload_module(void)
{
	AST_TEST_UNREGISTER(test_cel_channel_creation);
	AST_TEST_UNREGISTER(test_cel_unanswered_inbound_call);
	AST_TEST_UNREGISTER(test_cel_unanswered_outbound_call);
	AST_TEST_UNREGISTER(test_cel_single_party);
	AST_TEST_UNREGISTER(test_cel_single_bridge);
	AST_TEST_UNREGISTER(test_cel_single_bridge_continue);
	AST_TEST_UNREGISTER(test_cel_single_twoparty_bridge_a);
	AST_TEST_UNREGISTER(test_cel_single_twoparty_bridge_b);
#ifdef RACEY_TESTS
	AST_TEST_UNREGISTER(test_cel_single_multiparty_bridge);
#endif

	AST_TEST_UNREGISTER(test_cel_dial_unanswered);
	AST_TEST_UNREGISTER(test_cel_dial_unanswered_filter);
	AST_TEST_UNREGISTER(test_cel_dial_congestion);
	AST_TEST_UNREGISTER(test_cel_dial_busy);
	AST_TEST_UNREGISTER(test_cel_dial_unavailable);
	AST_TEST_UNREGISTER(test_cel_dial_caller_cancel);
	AST_TEST_UNREGISTER(test_cel_dial_parallel_failed);
	AST_TEST_UNREGISTER(test_cel_dial_answer_no_bridge);
	AST_TEST_UNREGISTER(test_cel_dial_answer_twoparty_bridge_a);
	AST_TEST_UNREGISTER(test_cel_dial_answer_twoparty_bridge_b);
#ifdef RACEY_TESTS
	AST_TEST_UNREGISTER(test_cel_dial_answer_multiparty);
	AST_TEST_UNREGISTER(test_cel_attended_transfer_bridges_swap);
	AST_TEST_UNREGISTER(test_cel_attended_transfer_bridges_link);
#endif

	AST_TEST_UNREGISTER(test_cel_blind_transfer);
	AST_TEST_UNREGISTER(test_cel_attended_transfer_bridges_merge);

	AST_TEST_UNREGISTER(test_cel_dial_pickup);

	AST_TEST_UNREGISTER(test_cel_local_optimize);

	ast_channel_unregister(&test_cel_chan_tech);

	ao2_cleanup(cel_test_config);
	cel_test_config = NULL;

	return 0;
}

static int load_module(void)
{
	/* build the test config */
	cel_test_config = ast_cel_general_config_alloc();
	if (!cel_test_config) {
		return -1;
	}
	cel_test_config->enable = 1;
	if (ast_str_container_add(cel_test_config->apps, "dial")) {
		return -1;
	}
	if (ast_str_container_add(cel_test_config->apps, "park")) {
		return -1;
	}
	if (ast_str_container_add(cel_test_config->apps, "queue")) {
		return -1;
	}
	cel_test_config->events |= 1<<AST_CEL_APP_START;
	cel_test_config->events |= 1<<AST_CEL_CHANNEL_START;
	cel_test_config->events |= 1<<AST_CEL_CHANNEL_END;
	cel_test_config->events |= 1<<AST_CEL_ANSWER;
	cel_test_config->events |= 1<<AST_CEL_HANGUP;
	cel_test_config->events |= 1<<AST_CEL_BRIDGE_ENTER;
	cel_test_config->events |= 1<<AST_CEL_BRIDGE_EXIT;
	cel_test_config->events |= 1<<AST_CEL_BLINDTRANSFER;
	cel_test_config->events |= 1<<AST_CEL_ATTENDEDTRANSFER;
	cel_test_config->events |= 1<<AST_CEL_PICKUP;
	cel_test_config->events |= 1<<AST_CEL_LOCAL_OPTIMIZE;

	ast_channel_register(&test_cel_chan_tech);

	AST_TEST_REGISTER(test_cel_channel_creation);
	AST_TEST_REGISTER(test_cel_unanswered_inbound_call);
	AST_TEST_REGISTER(test_cel_unanswered_outbound_call);

	AST_TEST_REGISTER(test_cel_single_party);
	AST_TEST_REGISTER(test_cel_single_bridge);
	AST_TEST_REGISTER(test_cel_single_bridge_continue);
	AST_TEST_REGISTER(test_cel_single_twoparty_bridge_a);
	AST_TEST_REGISTER(test_cel_single_twoparty_bridge_b);
#ifdef RACEY_TESTS
	AST_TEST_REGISTER(test_cel_single_multiparty_bridge);
#endif

	AST_TEST_REGISTER(test_cel_dial_unanswered);
	AST_TEST_REGISTER(test_cel_dial_unanswered_filter);
	AST_TEST_REGISTER(test_cel_dial_congestion);
	AST_TEST_REGISTER(test_cel_dial_busy);
	AST_TEST_REGISTER(test_cel_dial_unavailable);
	AST_TEST_REGISTER(test_cel_dial_caller_cancel);
	AST_TEST_REGISTER(test_cel_dial_parallel_failed);
	AST_TEST_REGISTER(test_cel_dial_answer_no_bridge);
	AST_TEST_REGISTER(test_cel_dial_answer_twoparty_bridge_a);
	AST_TEST_REGISTER(test_cel_dial_answer_twoparty_bridge_b);
#ifdef RACEY_TESTS
	AST_TEST_REGISTER(test_cel_dial_answer_multiparty);
	AST_TEST_REGISTER(test_cel_attended_transfer_bridges_swap);
	AST_TEST_REGISTER(test_cel_attended_transfer_bridges_link);
#endif

	AST_TEST_REGISTER(test_cel_blind_transfer);
	AST_TEST_REGISTER(test_cel_attended_transfer_bridges_merge);

	AST_TEST_REGISTER(test_cel_dial_pickup);

	AST_TEST_REGISTER(test_cel_local_optimize);

	/* ast_test_register_* has to happen after AST_TEST_REGISTER */
	/* Verify received vs expected events and clean things up after every test */
	ast_test_register_init(TEST_CATEGORY, test_cel_init_cb);
	ast_test_register_cleanup(TEST_CATEGORY, cel_verify_and_cleanup_cb);

	return AST_MODULE_LOAD_SUCCESS;
}

AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "CEL unit tests");