1: %% Stream Management tests
    2: -module(sm_SUITE).
    3: 
    4: -compile([export_all, nowarn_export_all]).
    5: -include_lib("exml/include/exml.hrl").
    6: -include_lib("eunit/include/eunit.hrl").
    7: -include_lib("escalus/include/escalus.hrl").
    8: -include_lib("common_test/include/ct.hrl").
    9: 
   10: %% Injected code callbacks
   11: -export([rpc_start_hook_handler/3,
   12:          rpc_stop_hook_handler/2,
   13:          hook_handler_fn/3,
   14:          regression_handler/5]).
   15: 
   16: -export([rpc_start_filter_hook_handler/3,
   17:          rpc_stop_filter_hook_handler/2,
   18:          filter_hook_handler_fn/3]).
   19: 
   20: -import(distributed_helper, [mim/0,
   21:                              require_rpc_nodes/1,
   22:                              rpc/4]).
   23: 
   24: -import(domain_helper, [host_type/0]).
   25: 
   26: -import(sm_helper, [connect_fresh/3,
   27:                     connect_fresh/4,
   28:                     connect_spec/2,
   29:                     connect_spec/3,
   30:                     connect_same/2,
   31:                     connect_same/3,
   32:                     connect_resume/2,
   33:                     process_initial_stanza/1,
   34:                     send_initial_presence/1,
   35:                     get_ack/1,
   36:                     ack_initial_presence/1]).
   37: 
   38: -define(MOD_SM, mod_stream_management).
   39: -define(CONSTRAINT_CHECK_TIMEOUT, 5000).
   40: -define(LONG_TIMEOUT, 3600).
   41: -define(SHORT_TIMEOUT, 1).
   42: -define(SMALL_SM_BUFFER, 3).
   43: -define(PING_REQUEST_TIMEOUT, 1).
   44: -define(PING_INTERVAL, 3).
   45: 
   46: %%--------------------------------------------------------------------
   47: %% Suite configuration
   48: %%--------------------------------------------------------------------
   49: 
   50: suite() ->
   51:     require_rpc_nodes([mim]) ++ escalus:suite().
   52: 
   53: all() ->
   54:     ct_helper:groups_to_all(groups()).
   55: 
   56: groups() ->
   57:     G = [
   58:     %  {parallel, [parallel], parallel_cases()},
   59:     %  {parallel_manual_ack_freq_1, [parallel], parallel_manual_ack_freq_1_cases()},
   60:     %  {manual_ack_freq_2, [], manual_ack_freq_2_cases()},
   61:     %  {stale_h, [], stale_h_cases()},
   62:     %  {parallel_unacknowledged_message_hook, [parallel], parallel_unacknowledged_message_hook_cases()}
   63:      {ping, [], [ping_timeout]}
   64:     ],
   65:     ct_helper:repeat_all_until_any_fail(G, 1000).
   66: 
   67: parallel_cases() ->
   68:     [server_announces_sm,
   69:      server_enables_sm_before_session,
   70:      server_enables_sm_after_session,
   71:      server_returns_failed_after_start,
   72:      server_returns_failed_after_auth,
   73:      server_enables_resumption,
   74:      client_enables_sm_twice_fails_with_correct_error_stanza,
   75:      session_resumed_then_old_session_is_closed_gracefully_with_correct_error_stanza,
   76:      session_resumed_and_old_session_dead_doesnt_route_error_to_new_session,
   77:      basic_ack,
   78:      h_ok_before_session,
   79:      h_ok_after_session_enabled_before_session,
   80:      h_ok_after_session_enabled_after_session,
   81:      h_ok_after_a_chat,
   82:      h_non_given_closes_stream_gracefully,
   83:      resend_unacked_on_reconnection,
   84:      session_established,
   85:      wait_for_resumption,
   86:      resume_session,
   87:      resume_session_with_wrong_h_does_not_leak_sessions,
   88:      resume_session_with_wrong_sid_returns_item_not_found,
   89:      resume_session_with_wrong_namespace_is_a_noop,
   90:      resume_dead_session_results_in_item_not_found,
   91:      resume_session_kills_old_C2S_gracefully,
   92:      carboncopy_works,
   93:      carboncopy_works_after_resume,
   94:      aggressively_pipelined_resume,
   95:      replies_are_processed_by_resumed_session,
   96:      subscription_requests_are_buffered_properly,
   97:      messages_are_properly_flushed_during_resumption].
   98: 
   99: parallel_manual_ack_freq_1_cases() ->
  100:     [client_acks_more_than_sent,
  101:      too_many_unacked_stanzas,
  102:      resend_unacked_after_resume_timeout,
  103:      resume_session_state_send_message_with_ack,
  104:      resume_session_state_send_message_without_ack,
  105:      resume_session_state_stop_c2s,
  106:      server_requests_ack_after_session,
  107:      resend_more_offline_messages_than_buffer_size,
  108:      server_requests_ack].
  109: 
  110: manual_ack_freq_2_cases() ->
  111:     [server_requests_ack_freq_2].
  112: 
  113: stale_h_cases() ->
  114:     [resume_expired_session_returns_correct_h,
  115:      gc_repeat_after_never_means_no_cleaning,
  116:      gc_repeat_after_timeout_does_clean].
  117: 
  118: stream_mgmt_disabled_cases() ->
  119:     [no_crash_if_stream_mgmt_disabled_but_client_requests_stream_mgmt,
  120:      no_crash_if_stream_mgmt_disabled_but_client_requests_stream_mgmt_with_resumption].
  121: 
  122: manual_ack_freq_long_session_timeout_cases() ->
  123:     [preserve_order].
  124: 
  125: parallel_unacknowledged_message_hook_cases() ->
  126:     [unacknowledged_message_hook_bounce,
  127:      unacknowledged_message_hook_offline,
  128:      unacknowledged_message_hook_resume,
  129:      unacknowledged_message_hook_filter].
  130: 
  131: %%--------------------------------------------------------------------
  132: %% Init & teardown
  133: %%--------------------------------------------------------------------
  134: 
  135: init_per_suite(Config) ->
  136:     NewConfig = dynamic_modules:save_modules(host_type(), Config),
  137:     NewConfigWithSM = escalus_users:update_userspec(NewConfig, alice, stream_management, true),
  138:     mongoose_helper:inject_module(?MODULE),
  139:     escalus:init_per_suite(NewConfigWithSM).
  140: 
  141: end_per_suite(Config) ->
  142:     escalus_fresh:clean(),
  143:     dynamic_modules:restore_modules(Config),
  144:     escalus:end_per_suite(Config).
  145: 
  146: init_per_group(Group, Config) when Group =:= parallel_unacknowledged_message_hook;
  147:                                    Group =:= manual_ack_freq_long_session_timeout;
  148:                                    Group =:= parallel_manual_ack_freq_1;
  149:                                    Group =:= manual_ack_freq_2 ->
  150:     dynamic_modules:ensure_modules(host_type(), required_modules(group, Group)),
  151:     Config;
  152: init_per_group(stale_h, Config) ->
  153:     Config;
  154: init_per_group(stream_mgmt_disabled, Config) ->
  155:     dynamic_modules:stop(host_type(), ?MOD_SM),
  156:     rpc(mim(), mnesia, delete_table, [sm_session]),
  157:     Config;
  158: init_per_group(ping, Config) ->
  159:     Config;
  160: init_per_group(Group, Config) ->
  161:     dynamic_modules:ensure_modules(host_type(), required_modules(group, Group)),
  162:     Config.
  163: 
  164: end_per_group(_Group, _Config) ->
  165:     ok.
  166: 
  167: init_per_testcase(resume_expired_session_returns_correct_h = CN, Config) ->
  168:     dynamic_modules:ensure_modules(host_type(), required_modules(testcase, CN)),
  169:     escalus:init_per_testcase(CN, Config);
  170: init_per_testcase(CN, Config) when CN =:= gc_repeat_after_never_means_no_cleaning;
  171:                                    CN =:= gc_repeat_after_timeout_does_clean ->
  172:     dynamic_modules:ensure_modules(host_type(), required_modules(testcase, CN)),
  173:     Config2 = register_some_smid_h(Config),
  174:     escalus:init_per_testcase(CN, Config2);
  175: init_per_testcase(ping_timeout = CN, Config) ->
  176:     ok = rpc(mim(), meck, new, [mod_ping, [passthrough, no_link]]),
  177:     dynamic_modules:ensure_modules(host_type(), required_modules(testcase, CN)),
  178:     escalus:init_per_testcase(CN, Config);
  179: init_per_testcase(server_requests_ack_freq_2 = CN, Config) ->
  180:     escalus:init_per_testcase(CN, Config);
  181: init_per_testcase(replies_are_processed_by_resumed_session = CN, Config) ->
  182:     register_handler(),
  183:     escalus:init_per_testcase(CN, Config);
  184: init_per_testcase(CaseName, Config) ->
  185:     escalus:init_per_testcase(CaseName, Config).
  186: 
  187: end_per_testcase(CN, Config) when CN =:= resume_expired_session_returns_correct_h;
  188:                                   CN =:= gc_repeat_after_never_means_no_cleaning;
  189:                                   CN =:= gc_repeat_after_timeout_does_clean ->
  190:     Name = rpc(mim(), gen_mod, get_module_proc, [host_type(), stream_management_stale_h]),
  191:     rpc(mim(), ejabberd_sup, stop_child, [Name]),
  192:     escalus:end_per_testcase(CN, Config);
  193: end_per_testcase(replies_are_processed_by_resumed_session = CN, Config) ->
  194:     unregister_handler(),
  195:     escalus:end_per_testcase(CN, Config);
  196: end_per_testcase(ping_timeout = CN, Config) ->
  197:     rpc(mim(), meck, unload, [mod_ping]),
  198:     escalus:end_per_testcase(CN, Config);
  199: end_per_testcase(CaseName, Config) ->
  200:     escalus:end_per_testcase(CaseName, Config).
  201: 
  202: %% Module configuration per group (in case of stale_h group it is per testcase)
  203: 
  204: required_modules(Scope, Name) ->
  205:     SMConfig = case required_sm_opts(Scope, Name) of
  206:                    stopped -> stopped;
  207:                    ExtraOpts -> maps:merge(common_sm_opts(), ExtraOpts)
  208:                end,
  209:     Backend = mongoose_helper:mnesia_or_rdbms_backend(),
  210:     BaseModules = [
  211:      {mod_stream_management, config_parser_helper:mod_config(mod_stream_management, SMConfig)},
  212:      {mod_offline, config_parser_helper:mod_config(mod_offline, #{backend => Backend})}
  213:      ],
  214:      case Name of
  215:         ping_timeout ->
  216:             BaseModules ++ [{mod_ping, config_parser_helper:mod_config(mod_ping, mod_ping_opts())}];
  217:         _ ->
  218:             BaseModules
  219:     end.
  220: 
  221: required_sm_opts(group, parallel) ->
  222:     #{ack_freq => never};
  223: required_sm_opts(group, parallel_manual_ack_freq_1) ->
  224:     #{ack_freq => 1,
  225:       resume_timeout => ?LONG_TIMEOUT};
  226: required_sm_opts(group, manual_ack_freq_2) ->
  227:     #{ack_freq => 2};
  228: required_sm_opts(group, stream_mgmt_disabled) ->
  229:     stopped;
  230: required_sm_opts(group, parallel_unacknowledged_message_hook) ->
  231:     #{ack_freq => 1};
  232: required_sm_opts(group, manual_ack_freq_long_session_timeout) ->
  233:     #{ack_freq => 1, buffer_max => 1000};
  234: required_sm_opts(testcase, resume_expired_session_returns_correct_h) ->
  235:     #{ack_freq => 1,
  236:       resume_timeout => ?SHORT_TIMEOUT,
  237:       stale_h => stale_h(?LONG_TIMEOUT, ?LONG_TIMEOUT)};
  238: required_sm_opts(testcase, gc_repeat_after_never_means_no_cleaning) ->
  239:     #{stale_h => stale_h(?LONG_TIMEOUT, ?SHORT_TIMEOUT)};
  240: required_sm_opts(testcase, gc_repeat_after_timeout_does_clean) ->
  241:     #{stale_h => stale_h(?SHORT_TIMEOUT, ?SHORT_TIMEOUT)};
  242: required_sm_opts(testcase, ping_timeout) ->
  243:     #{ack_freq => 1,
  244:       resume_timeout => ?SHORT_TIMEOUT}.
  245: 
  246: common_sm_opts() ->
  247:     Backend = ct_helper:get_internal_database(),
  248:     #{buffer_max => ?SMALL_SM_BUFFER, backend => Backend}.
  249: 
  250: stale_h(RepeatAfter, Geriatric) ->
  251:     #{enabled => true,
  252:       repeat_after => RepeatAfter,
  253:       geriatric => Geriatric}.
  254: 
  255: make_smid() ->
  256:     base64:encode(crypto:strong_rand_bytes(21)).
  257: 
  258: register_smid(IntSmidId) ->
  259:     S = {SMID = make_smid(), IntSmidId},
  260:     ok = rpc(mim(), ?MOD_SM, register_stale_smid_h, [host_type(), SMID, IntSmidId]),
  261:     S.
  262: 
  263: register_some_smid_h(Config) ->
  264:     TestSmids = lists:map(fun register_smid/1, lists:seq(1, 3)),
  265:     [{smid_test, TestSmids} | Config].
  266: 
  267: mod_ping_opts() ->
  268:     #{send_pings => true,
  269:       ping_interval => ?PING_INTERVAL,
  270:       ping_req_timeout => ?PING_REQUEST_TIMEOUT,
  271:       timeout_action => kill}.
  272: 
  273: %%--------------------------------------------------------------------
  274: %% Tests
  275: %%--------------------------------------------------------------------
  276: 
  277: server_announces_sm(Config) ->
  278:     AliceSpec = escalus_fresh:freshen_spec(Config, alice),
  279:     {ok, #client{props = Props}, Features} = escalus_connection:start(AliceSpec,
  280:                                                                       [start_stream]),
  281:     true = escalus_session:can_use_stream_management(Props, Features).
  282: 
  283: 
  284: server_enables_sm_before_session(Config) ->
  285:     connect_fresh(Config, alice, sm_after_bind).
  286: 
  287: server_enables_sm_after_session(Config) ->
  288:     connect_fresh(Config, alice, sm_after_session).
  289: 
  290: server_returns_failed_after_start(Config) ->
  291:     Alice = connect_fresh(Config, alice, before_auth),
  292:     server_returns_failed(Alice).
  293: 
  294: server_returns_failed_after_auth(Config) ->
  295:     Alice = connect_fresh(Config, alice, auth),
  296:     server_returns_failed(Alice).
  297: 
  298: server_enables_resumption(Config) ->
  299:     Alice = connect_fresh(Config, alice, sr_presence),
  300:     escalus_connection:stop(Alice).
  301: 
  302: server_returns_failed(Alice) ->
  303:     escalus_connection:send(Alice, escalus_stanza:enable_sm()),
  304:     escalus:assert(is_sm_failed, [<<"unexpected-request">>],
  305:                    escalus_connection:get_stanza(Alice, enable_sm_failed)).
  306: 
  307: client_enables_sm_twice_fails_with_correct_error_stanza(Config) ->
  308:     Alice = connect_fresh(Config, alice, sm_before_session),
  309:     escalus_connection:send(Alice, escalus_stanza:enable_sm()),
  310:     escalus:assert(is_sm_failed, [<<"unexpected-request">>],
  311:                    escalus_connection:get_stanza(Alice, enable_sm_failed)),
  312:     escalus:assert(is_stream_end,
  313:                    escalus_connection:get_stanza(Alice, enable_sm_failed)),
  314:     true = escalus_connection:wait_for_close(Alice, timer:seconds(5)).
  315: 
  316: session_resumed_then_old_session_is_closed_gracefully_with_correct_error_stanza(Config) ->
  317:     %% GIVEN USER WITH STREAM RESUMPTION ENABLED
  318:     Alice = connect_fresh(Config, alice, sr_presence),
  319:     SMH = escalus_connection:get_sm_h(Alice),
  320:     %% WHEN USER RESUMES SESSION FROM NEW CLIENT
  321:     Alice2 = connect_resume(Alice, SMH),
  322:     process_initial_stanza(Alice2),
  323:     %% THEN: Old session is gracefully closed with the correct error stanza
  324:     escalus:assert(is_stream_error, [<<"conflict">>, <<>>],
  325:                    escalus_connection:get_stanza(Alice, close_old_stream)),
  326:     escalus:assert(is_stream_end,
  327:                    escalus_connection:get_stanza(Alice, close_old_stream)),
  328:     true = escalus_connection:wait_for_close(Alice, timer:seconds(5)),
  329:     true = escalus_connection:is_connected(Alice2),
  330:     escalus_connection:stop(Alice2).
  331: 
  332: session_resumed_and_old_session_dead_doesnt_route_error_to_new_session(Config) ->
  333:     %% GIVEN USER WITH STREAM RESUMPTION ENABLED
  334:     Alice = connect_fresh(Config, alice, sr_presence),
  335:     %% WHEN FIRST SESSION DIES AND USER RESUMES FROM NEW CLIENT
  336:     Alice2 = sm_helper:kill_and_connect_resume(Alice),
  337:     process_initial_stanza(Alice2),
  338:     %% THEN new session does not have any message rerouted
  339:     false = escalus_client:has_stanzas(Alice2),
  340:     true = escalus_connection:is_connected(Alice2),
  341:     escalus_connection:stop(Alice2).
  342: 
  343: basic_ack(Config) ->
  344:     Alice = connect_fresh(Config, alice, sm_after_session),
  345:     escalus_connection:send(Alice, escalus_stanza:roster_get()),
  346:     escalus:assert(is_roster_result,
  347:                    escalus_connection:get_stanza(Alice, roster_result)),
  348:     escalus_connection:send(Alice, escalus_stanza:sm_request()),
  349:     escalus:assert(is_sm_ack,
  350:                    escalus_connection:get_stanza(Alice, stream_mgmt_ack)).
  351: 
  352: %% Test that "h" value is valid when:
  353: %% - SM is enabled *before* the session is established
  354: %% - <r/> is sent *before* the session is established
  355: h_ok_before_session(Config) ->
  356:     Alice = connect_fresh(Config, alice, sm_after_bind),
  357:     escalus_connection:send(Alice, escalus_stanza:sm_request()),
  358:     escalus:assert(is_sm_ack, [0],
  359:                    escalus_connection:get_stanza(Alice, stream_mgmt_ack)).
  360: 
  361: %% Test that "h" value is valid when:
  362: %% - SM is enabled *before* the session is established
  363: %% - <r/> is sent *after* the session is established
  364: h_ok_after_session_enabled_before_session(Config) ->
  365:     Alice = connect_fresh(Config, alice, sm_before_session),
  366:     escalus_connection:send(Alice, escalus_stanza:sm_request()),
  367:     escalus:assert(is_sm_ack, [1],
  368:                    escalus_connection:get_stanza(Alice, stream_mgmt_ack)).
  369: 
  370: %% Test that "h" value is valid when:
  371: %% - SM is enabled *after* the session is established
  372: %% - <r/> is sent *after* the session is established
  373: h_ok_after_session_enabled_after_session(Config) ->
  374:     Alice = connect_fresh(Config, alice, sm_after_session),
  375:     escalus_connection:send(Alice, escalus_stanza:roster_get()),
  376:     escalus:assert(is_roster_result,
  377:                    escalus_connection:get_stanza(Alice, roster_result)),
  378:     escalus_connection:send(Alice, escalus_stanza:sm_request()),
  379:     escalus:assert(is_sm_ack, [1],
  380:                    escalus_connection:get_stanza(Alice, stream_mgmt_ack)).
  381: 
  382: %% Test that "h" value is valid after exchanging a few messages.
  383: h_ok_after_a_chat(ConfigIn) ->
  384:     Config = escalus_users:update_userspec(ConfigIn, alice,
  385:                                            stream_management, true),
  386:     escalus:fresh_story(Config, [{alice,1}, {bob,1}], fun(Alice, Bob) ->
  387:         escalus:send(Alice, escalus_stanza:chat_to(Bob, <<"Hi, Bob!">>)),
  388:         escalus:assert(is_chat_message, [<<"Hi, Bob!">>],
  389:                        escalus:wait_for_stanza(Bob)),
  390:         escalus:send(Bob, escalus_stanza:chat_to(Alice, <<"Hi, Alice!">>)),
  391:         escalus:assert(is_chat_message, [<<"Hi, Alice!">>],
  392:                        escalus:wait_for_stanza(Alice)),
  393:         escalus:send(Bob, escalus_stanza:chat_to(Alice, <<"How's life?">>)),
  394:         escalus:assert(is_chat_message, [<<"How's life?">>],
  395:                        escalus:wait_for_stanza(Alice)),
  396:         escalus:send(Alice, escalus_stanza:chat_to(Bob, <<"Pretty !@#$%^$">>)),
  397:         escalus:assert(is_chat_message, [<<"Pretty !@#$%^$">>],
  398:                        escalus:wait_for_stanza(Bob)),
  399:         escalus:send(Alice, escalus_stanza:sm_request()),
  400:         escalus:assert(is_sm_ack, [3], escalus:wait_for_stanza(Alice)),
  401:         %% Ack, so that unacked messages don't go into offline store.
  402:         escalus:send(Alice, escalus_stanza:sm_ack(3))
  403:     end).
  404: 
  405: h_non_given_closes_stream_gracefully(ConfigIn) ->
  406:     AStanza = #xmlel{name = <<"a">>,
  407:                attrs = [{<<"xmlns">>, <<"urn:xmpp:sm:3">>}]},
  408:     Config = escalus_users:update_userspec(ConfigIn, alice,
  409:                                            stream_management, true),
  410:     escalus:fresh_story(Config, [{alice,1}], fun(Alice) ->
  411:         C2SPid = mongoose_helper:get_session_pid(Alice),
  412:         escalus:send(Alice, AStanza),
  413:         escalus:assert(is_stream_error,
  414:                        [<<"policy-violation">>, <<>>],
  415:                        escalus:wait_for_stanza(Alice)),
  416:         mongoose_helper:wait_for_pid_to_die(C2SPid),
  417:         escalus:assert(is_stream_end, escalus_connection:get_stanza(Alice, stream_end)),
  418:         true = escalus_connection:wait_for_close(Alice, timer:seconds(5))
  419:     end).
  420: 
  421: client_acks_more_than_sent(Config) ->
  422:     Alice = connect_fresh(Config, alice, sm_after_session),
  423:     escalus:send(Alice, escalus_stanza:sm_ack(5)),
  424:     StreamErrorStanza = escalus:wait_for_stanza(Alice),
  425:     %% Assert "undefined-condition" children
  426:     escalus:assert(is_stream_error, [<<"undefined-condition">>, <<>>], StreamErrorStanza),
  427:     %% Assert "handled-count-too-high" children with correct attributes
  428:     HandledCountSubElement = exml_query:path(StreamErrorStanza,
  429:                                              [{element_with_ns,
  430:                                                <<"handled-count-too-high">>,
  431:                                                <<"urn:xmpp:sm:3">>}]),
  432:     <<"5">> = exml_query:attr(HandledCountSubElement, <<"h">>),
  433:     <<"0">> = exml_query:attr(HandledCountSubElement, <<"send-count">>),
  434:     %% Assert graceful stream end
  435:     escalus:assert(is_stream_end, escalus_connection:get_stanza(Alice, stream_end)),
  436:     true = escalus_connection:wait_for_close(Alice, timer:seconds(5)).
  437: 
  438: too_many_unacked_stanzas(Config) ->
  439:     Bob = connect_fresh(Config, bob, presence),
  440:     Alice = connect_fresh(Config, alice, sm_presence, manual),
  441:     get_ack(Alice),
  442:     [escalus:send(Bob, escalus_stanza:chat_to(Alice,
  443:         <<(integer_to_binary(N))/binary, ": Hi, Alice!">>))
  444:      || N <- lists:seq(1,?SMALL_SM_BUFFER)],
  445:     escalus:wait_for_stanzas(Alice, ?SMALL_SM_BUFFER * 2), % messages and ack requests
  446:     escalus:assert(is_stream_error, [<<"resource-constraint">>,
  447:                                      <<"too many unacked stanzas">>],
  448:                    %% wait for deferred buffer check
  449:                    escalus:wait_for_stanza(Alice, ?CONSTRAINT_CHECK_TIMEOUT + 1000)).
  450: 
  451: server_requests_ack(Config) ->
  452:     server_requests_ack(Config, 1).
  453: 
  454: server_requests_ack_freq_2(Config) ->
  455:     server_requests_ack(Config, 2).
  456: 
  457: server_requests_ack(Config, N) ->
  458:     Bob = connect_fresh(Config, bob, presence),
  459:     Alice = connect_fresh(Config, alice, sm_presence, manual),
  460:     %% ack request after initial presence
  461:     maybe_assert_ack_request(1, N, Alice),
  462:     escalus:send(Bob, escalus_stanza:chat_to(Alice, <<"Hi, Alice!">>)),
  463:     escalus:assert(is_chat_message, [<<"Hi, Alice!">>],
  464:                    escalus:wait_for_stanza(Alice)),
  465:     maybe_assert_ack_request(2, N, Alice).
  466: 
  467: maybe_assert_ack_request(StanzasRec, AckRequests, Alice) ->
  468:     ct:log("StanzasRec: ~p, AckRequests: ~p", [StanzasRec, AckRequests]),
  469:     case StanzasRec rem AckRequests of
  470:         0 ->
  471:             escalus:assert(is_sm_ack_request, escalus:wait_for_stanza(Alice));
  472:         _ ->
  473:             ok
  474:     end,
  475:     StanzasRec.
  476: 
  477: server_requests_ack_after_session(Config) ->
  478:     Alice = connect_fresh(Config, alice, sm_before_session, manual),
  479:     escalus:assert(is_sm_ack_request, escalus_connection:get_stanza(Alice, stream_mgmt_req)).
  480: 
  481: resend_more_offline_messages_than_buffer_size(Config) ->
  482:     %% connect bob and alice
  483:     Bob = connect_fresh(Config, bob, presence),
  484:     AliceSpec = escalus_fresh:create_fresh_user(Config, alice),
  485: 
  486:     % sent some messages - more than unacked buffer size
  487:     MessagesToSend = ?SMALL_SM_BUFFER + 1,
  488:     AliceJid = common_helper:get_bjid(AliceSpec),
  489:     [escalus_connection:send(Bob, escalus_stanza:chat_to(AliceJid, integer_to_binary(I)))
  490:      || I <- lists:seq(1, MessagesToSend)],
  491:     mongoose_helper:wait_for_n_offline_messages(AliceJid, MessagesToSend),
  492: 
  493:     % connect alice who wants to receive all messages from offline storage
  494:     Alice = connect_spec(AliceSpec, sm_after_session, manual),
  495:     send_initial_presence(Alice),
  496:     escalus:wait_for_stanzas(Alice, MessagesToSend * 2), %messages and ack requests
  497: 
  498:     escalus_connection:get_stanza(Alice, presence),
  499:     get_ack(Alice), % ack request
  500: 
  501:     % confirm messages + presence
  502:     escalus_connection:send(Alice, escalus_stanza:sm_ack(4)),
  503:     % wait for check constraint message on server side
  504: 
  505:     ct:sleep(?CONSTRAINT_CHECK_TIMEOUT + 1000),
  506:     false = escalus_client:has_stanzas(Alice),
  507:     % should not receive anything especially any stream errors
  508: 
  509:     escalus_connection:stop(Alice),
  510:     escalus_connection:stop(Bob).
  511: 
  512: resend_unacked_on_reconnection(Config) ->
  513:     Texts = three_texts(),
  514:     Bob = connect_fresh(Config, bob, presence),
  515:     Alice = connect_fresh(Config, alice, sm_presence),
  516:     AliceSpec = sm_helper:client_to_spec0(Alice),
  517:     %% Bob sends some messages to Alice.
  518:     sm_helper:send_messages(Bob, Alice, Texts),
  519:     %% Alice receives the messages.
  520:     sm_helper:wait_for_messages(Alice, Texts),
  521:     %% Alice disconnects without acking the messages.
  522:     sm_helper:stop_client_and_wait_for_termination(Alice),
  523:     %% Messages go to the offline store.
  524:     %% Alice receives the messages from the offline store.
  525:     NewAlice = connect_spec(AliceSpec, session, manual),
  526:     send_initial_presence(NewAlice),
  527:     sm_helper:wait_for_messages(NewAlice, Texts),
  528:     %% Alice acks the delayed messages so they won't go again
  529:     %% to the offline store.
  530:     escalus_connection:send(NewAlice, escalus_stanza:sm_ack(3)).
  531: 
  532: %% Remove wait_for_n_offline_messages and you will get anything, but preserve_order
  533: %% TODO Test without wait_for_n_offline_messages. It would require changes in SM
  534: %%      and more strict tests, reproducing delays in SM and in mod_offline.
  535: preserve_order(Config) ->
  536:     %% connect bob and alice
  537:     Bob = connect_fresh(Config, bob, presence),
  538:     Alice = connect_fresh(Config, alice, sr_presence, manual),
  539:     AliceSpec = sm_helper:client_to_spec(Alice),
  540:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"1">>)),
  541: 
  542:     %% kill alice connection
  543:     escalus_connection:kill(Alice),
  544:     C2SPid = mongoose_helper:get_session_pid(Alice),
  545:     sm_helper:wait_until_resume_session(C2SPid),
  546: 
  547:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"2">>)),
  548:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"3">>)),
  549: 
  550:     NewAlice = connect_spec(AliceSpec, session, manual),
  551:     escalus_connection:send(NewAlice, escalus_stanza:enable_sm([resume])),
  552: 
  553:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"4">>)),
  554:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"5">>)),
  555: 
  556:     %% Without this check we will get stuff out of order
  557:     mongoose_helper:wait_for_n_offline_messages(NewAlice, 5),
  558: 
  559:     send_initial_presence(NewAlice),
  560:     %% Without this check we can get "6, 1, 2, 3, 4, 5" messages in the next receive_all_ordered
  561:     mongoose_helper:wait_for_n_offline_messages(NewAlice, 0),
  562:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"6">>)),
  563: 
  564:     %% "2, 3, 4, 5, 6, 1" is possible (where only 1 is from offline storage, the rest is from sm)
  565:     receive_all_ordered(NewAlice, 6),
  566: 
  567:     % replace connection
  568:     NewAlice2 = connect_spec(AliceSpec, session, manual),
  569:     % allow messages to go to the offline storage
  570:     mongoose_helper:wait_for_n_offline_messages(NewAlice, 6),
  571: 
  572:     send_initial_presence(NewAlice2),
  573: 
  574:     % receves messages in correct order
  575:     receive_all_ordered(NewAlice2, 6),
  576: 
  577:     escalus_connection:stop(Bob),
  578:     escalus_connection:stop(NewAlice2).
  579: 
  580: receive_all_ordered(Conn, Last) ->
  581:     receive_all_ordered(Conn, 1, Last, []).
  582: 
  583: %% Receive messages from N to Last.
  584: %% Ignores acks and presences.
  585: %% Handles case when out of order and when not enough stanzas.
  586: receive_all_ordered(_Conn, N, Last, Acc) when N > Last ->
  587:     Texts = lists:map(fun integer_to_binary/1, lists:seq(1, Last)),
  588:     sm_helper:assert_messages(Acc, Texts);
  589: receive_all_ordered(Conn, N, Last, Acc) ->
  590:     Stanzas = escalus:wait_for_stanzas(Conn, 1),
  591:     case Stanzas of
  592:         [#xmlel{name = <<"message">>}] ->
  593:             receive_all_ordered(Conn, N + 1, Last, Acc ++ Stanzas);
  594:         [_] -> %% Ack or presence
  595:             receive_all_ordered(Conn, N, Last, Acc);
  596:         [] ->
  597:             ct:fail({timeout_waiting, N, Acc})
  598:     end.
  599: 
  600: resend_unacked_after_resume_timeout(Config) ->
  601:     %% connect bob and alice
  602:     Bob = connect_fresh(Config, bob, presence),
  603:     Alice = connect_fresh(Config, alice, sr_presence),
  604:     AliceSpec = sm_helper:client_to_spec(Alice),
  605: 
  606:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"msg-1">>)),
  607:     %% kill alice connection
  608:     escalus_connection:kill(Alice),
  609: 
  610:     %% ensure there is no session
  611:     C2SPid = mongoose_helper:get_session_pid(Alice),
  612:     sm_helper:wait_until_resume_session(C2SPid),
  613: 
  614:     %% alice come back and receives unacked message
  615:     NewAlice = connect_spec(AliceSpec, session),
  616:     send_initial_presence(NewAlice),
  617: 
  618:     escalus_new_assert:mix_match([is_presence, is_chat(<<"msg-1">>)],
  619:                                  escalus:wait_for_stanzas(NewAlice, 2)),
  620: 
  621:     escalus_connection:stop(Bob),
  622:     escalus_connection:stop(NewAlice).
  623: 
  624: ping_timeout(Config) ->
  625:     %% make sure there are no leftover stanzas in the history
  626:     ?assertEqual([], get_stanzas_filtered_by_mod_ping()),
  627: 
  628:     %% connect Alice and wait for the session to close
  629:     Alice = connect_fresh(Config, alice, sr_presence),
  630:     SMH = escalus_connection:get_sm_h(Alice),
  631:     SMID = sm_helper:client_to_smid(Alice),
  632: 
  633:     escalus_client:wait_for_stanza(Alice),
  634:     ct:sleep(?PING_REQUEST_TIMEOUT + ?PING_INTERVAL + timer:seconds(1)),
  635: 
  636:     %% attempt to resume the session after the connection drop
  637:     sm_helper:kill_client_and_wait_for_termination(Alice),
  638:     NewAlice = connect_same(Alice, auth),
  639:     escalus_connection:send(NewAlice, escalus_stanza:resume(SMID, SMH)),
  640: 
  641:     %% after resume_timeout, we expect the session to be closed
  642:     escalus_connection:get_stanza(NewAlice, failed_resumption),
  643: 
  644:     %% bind a new session and expect unacknowledged messages to be resent
  645:     escalus_session:session(escalus_session:bind(NewAlice)),
  646:     send_initial_presence(NewAlice),
  647: 
  648:     %% check if the error stanza was handled by mod_ping
  649:     [Stanza] = get_stanzas_filtered_by_mod_ping(),
  650:     escalus:assert(is_iq_error, Stanza),
  651:     ?assertNotEqual(undefined,
  652:         exml_query:subelement_with_name_and_ns(Stanza, <<"ping">>, <<"urn:xmpp:ping">>)),
  653: 
  654:     %% stop the connection
  655:     escalus_connection:stop(NewAlice).
  656: 
  657: resume_expired_session_returns_correct_h(Config) ->
  658:     %% connect bob and alice
  659:     Bob = connect_fresh(Config, bob, sr_presence),
  660:     Alice = connect_fresh(Config, alice, sr_presence, manual),
  661:     get_ack(Alice),
  662: 
  663:     %% Bob sends a message to Alice, and Alice receives it but doesn't acknowledge
  664:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"msg-1">>)),
  665:     escalus:assert(is_chat_message, [<<"msg-1">>], escalus:wait_for_stanza(Alice)),
  666:     %% alice comes back, but too late, so resumption doesn't work,
  667:     %% but she receives the previous h = 1 anyway
  668:     %% NewAlice is also manual ack
  669:     NewAlice = sm_helper:kill_and_connect_with_resume_session_without_waiting_for_result(Alice),
  670:     FailedResumption = escalus_connection:get_stanza(NewAlice, failed_resumption),
  671:     <<"1">> = exml_query:attr(FailedResumption, <<"h">>),
  672:     %% And we can continue with bind and session
  673:     escalus_session:session(escalus_session:bind(NewAlice)),
  674:     send_initial_presence(NewAlice),
  675:     Stanzas = [escalus_connection:get_stanza(NewAlice, {msg, 1}),
  676:                escalus_connection:get_stanza(NewAlice, {msg, 2})],
  677:     escalus_new_assert:mix_match([is_presence, is_chat(<<"msg-1">>)], Stanzas),
  678:     escalus_connection:stop(Bob),
  679:     escalus_connection:stop(NewAlice).
  680: 
  681: gc_repeat_after_never_means_no_cleaning(Config) ->
  682:     [{SMID1, _}, {SMID2, _}, {SMID3, _}] = ?config(smid_test, Config),
  683:     {stale_h, 1} = rpc(mim(), ?MOD_SM, get_session_from_smid, [host_type(), SMID1]),
  684:     {stale_h, 2} = rpc(mim(), ?MOD_SM, get_session_from_smid, [host_type(), SMID2]),
  685:     {stale_h, 3} = rpc(mim(), ?MOD_SM, get_session_from_smid, [host_type(), SMID3]).
  686: 
  687: gc_repeat_after_timeout_does_clean(Config) ->
  688:     [{SMID1, _} | _ ] = ?config(smid_test, Config),
  689:     mongoose_helper:wait_until(fun() ->
  690:                                        rpc(mim(), ?MOD_SM, get_stale_h, [host_type(), SMID1])
  691:                                end,
  692:                                {error, smid_not_found},
  693:                                #{name => smid_garbage_collected}).
  694: 
  695: resume_session_state_send_message_without_ack(Config) ->
  696:     resume_session_state_send_message_generic(Config, no_ack).
  697: 
  698: resume_session_state_send_message_with_ack(Config) ->
  699:     resume_session_state_send_message_generic(Config, ack).
  700: 
  701: resume_session_state_send_message_generic(Config, AckInitialPresence) ->
  702:     %% connect bob and alice
  703:     Bob = connect_fresh(Config, bob, presence),
  704:     Alice = connect_fresh(Config, alice, sr_presence, manual),
  705:     maybe_ack_initial_presence(Alice, AckInitialPresence),
  706:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"msg-1">>)),
  707:     %% kill alice connection
  708:     C2SPid = mongoose_helper:get_session_pid(Alice),
  709:     escalus_connection:kill(Alice),
  710:     sm_helper:wait_until_resume_session(C2SPid),
  711:     sm_helper:assert_alive_resources(Alice, 1),
  712: 
  713:     %% send some messages and check if c2s can handle it
  714:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"msg-2">>)),
  715:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"msg-3">>)),
  716:     %% suspend the process to ensure that Alice has enough time to reconnect,
  717:     %% before resumption timeout occurs.
  718:     ok = rpc(mim(), sys, suspend, [C2SPid]),
  719: 
  720:     %% alice comes back and receives unacked message
  721:     NewAlice = connect_same(Alice, presence),
  722:     %% now we can resume c2s process of the old connection
  723:     %% and let it process session resumption timeout
  724:     ok = rpc(mim(), sys, resume, [C2SPid]),
  725:     Stanzas = escalus:wait_for_stanzas(NewAlice, 3),
  726: 
  727:     % what about order ?
  728:     % alice receive presence from herself and 3 unacked messages from bob
  729:     escalus_new_assert:mix_match([is_chat(<<"msg-1">>),
  730:                                   is_chat(<<"msg-2">>),
  731:                                   is_chat(<<"msg-3">>)],
  732:                                  Stanzas),
  733:     escalus_connection:stop(Bob),
  734:     escalus_connection:stop(NewAlice).
  735: 
  736: %%for instance it can be done by mod ping
  737: resume_session_state_stop_c2s(Config) ->
  738:     Bob = connect_fresh(Config, bob, presence),
  739:     Alice = connect_fresh(Config, alice, sr_presence, manual),
  740: 
  741:     get_ack(Alice),
  742:     ack_initial_presence(Alice),
  743: 
  744:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"msg-1">>)),
  745:     escalus:assert(is_chat_message, [<<"msg-1">>], escalus_connection:get_stanza(Alice, msg)),
  746: 
  747:     %% get pid of c2s
  748:     C2SPid = mongoose_helper:get_session_pid(Alice),
  749:     %% Wait c2s process to process our presence ack.
  750:     %% Otherwise, we can receive two initial presences sometimes.
  751:     sm_helper:wait_for_c2s_unacked_count(C2SPid, 1),
  752: 
  753:     % kill alice connection
  754:     escalus_connection:kill(Alice),
  755:     % session should be alive
  756:     sm_helper:assert_alive_resources(Alice, 1),
  757:     rpc(mim(), mongoose_c2s, stop, [C2SPid, normal]),
  758:     sm_helper:wait_until_resume_session(C2SPid),
  759:     %% suspend the process to ensure that Alice has enough time to reconnect,
  760:     %% before resumption timeout occurs.
  761:     ok = rpc(mim(), sys, suspend, [C2SPid]),
  762: 
  763:     %% alice comes back and receives unacked message
  764:     NewAlice = connect_same(Alice, presence, manual),
  765:     %% now we can resume c2s process of the old connection
  766:     %% and let it process session resumption timeout
  767:     ok = rpc(mim(), sys, resume, [C2SPid]),
  768: 
  769:     escalus:assert(is_chat_message, [<<"msg-1">>], escalus_connection:get_stanza(NewAlice, msg)),
  770:     escalus_connection:stop(Bob),
  771:     escalus_connection:stop(NewAlice).
  772: 
  773: %% This test only verifies the validity of helpers (get_session_pid,
  774: %% get_c2s_state_name) written for wait_for_resumption
  775: %% testcase.
  776: session_established(Config) ->
  777:     Alice = connect_fresh(Config, alice, presence),
  778:     C2SPid = mongoose_helper:get_session_pid(Alice),
  779:     session_established = mongoose_helper:get_c2s_state_name(C2SPid),
  780:     escalus_connection:stop(Alice).
  781: 
  782: %% Ensure that after a violent disconnection,
  783: %% the c2s waits for resumption (but don't resume yet).
  784: wait_for_resumption(Config) ->
  785:     AliceSpec = escalus_fresh:create_fresh_user(Config, alice),
  786:     Bob = connect_fresh(Config, bob, session),
  787:     Texts = three_texts(),
  788:     {C2SPid, _} = buffer_unacked_messages_and_die(Config, AliceSpec, Bob, Texts),
  789:     sm_helper:wait_until_resume_session(C2SPid).
  790: 
  791: unacknowledged_message_hook_filter(Config) ->
  792:     FilterText = <<"filter">>,
  793:     Bob = connect_fresh(Config, bob, presence),
  794:     AliceSpec = escalus_fresh:create_fresh_user(Config, alice),
  795:     Resource = proplists:get_value(username, AliceSpec),
  796:     HookHandlerExtra = start_filter_hook_listener(FilterText, Resource),
  797:     Alice = connect_spec([{resource, Resource} | AliceSpec], sr_presence, manual),
  798:     %% Ack the presence stanza
  799:     get_ack(Alice),
  800:     ack_initial_presence(Alice),
  801:     Messages = [<<"msg-1">>, <<"msg-2">>, <<"msg-3">>, <<"msg-4">>],
  802:     All = [<<"msg-1">>, FilterText, <<"msg-2">>, FilterText, <<"msg-3">>, <<"msg-4">>],
  803:     [ escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, Body)) || Body <- All ],
  804:     %% kill alice connection
  805:     C2SPid = mongoose_helper:get_session_pid(Alice),
  806:     escalus_connection:kill(Alice),
  807:     sm_helper:wait_until_resume_session(C2SPid),
  808:     sm_helper:assert_alive_resources(Alice, 1),
  809:     %% ensure second C2S is registered so all the messages are bounced properly
  810:     NewAlice = connect_spec([{resource, <<"2">>}| AliceSpec], sr_presence, manual),
  811:     send_initial_presence(NewAlice),
  812:     sm_helper:wait_for_resource_count(NewAlice, 2),
  813:     ok = rpc(mim(), sys, terminate, [C2SPid, normal]),
  814:     %% verify that the filtered message is never received
  815:     verify_no_receive_filtertext(NewAlice, FilterText, Messages),
  816:     stop_hook_listener(HookHandlerExtra),
  817:     escalus_connection:stop(Bob).
  818: 
  819: verify_no_receive_filtertext(_, _, []) ->
  820:     ok;
  821: verify_no_receive_filtertext(Client, FilterText, Messages) ->
  822:     case escalus:wait_for_stanzas(Client, 1, 500) of
  823:         [] -> ct:fail("Messages pending: ~p~n", [Messages]);
  824:         [St] ->
  825:             case exml_query:path(St, [{element, <<"body">>}, cdata]) of
  826:                 undefined ->
  827:                     verify_no_receive_filtertext(Client, FilterText, Messages);
  828:                 FilterText ->
  829:                     ct:fail("Composing forwarded from a different c2s process");
  830:                 Message ->
  831:                     Pred = fun(Msg) -> Msg =/= Message end,
  832:                     {Pending, _} = lists:partition(Pred, Messages),
  833:                     verify_no_receive_filtertext(Client, FilterText, Pending)
  834:             end
  835:     end.
  836: 
  837: unacknowledged_message_hook_resume(Config) ->
  838:     unacknowledged_message_hook_common(fun unacknowledged_message_hook_resume/4, Config).
  839: 
  840: unacknowledged_message_hook_resume(AliceSpec, Resource, SMID, _C2SPid) ->
  841:     NewAlice = connect_spec(AliceSpec, {resume, SMID, 1}, manual),
  842:     send_initial_presence(NewAlice),
  843:     {Resource, NewAlice}.
  844: 
  845: unacknowledged_message_hook_bounce(Config) ->
  846:     unacknowledged_message_hook_common(fun unacknowledged_message_hook_bounce/4, Config).
  847: 
  848: unacknowledged_message_hook_bounce(AliceSpec, Resource, _SMID, C2SPid) ->
  849:     NewResource = <<"new_", Resource/binary>>,
  850:     NewSpec = lists:keystore(resource, 1, AliceSpec, {resource, NewResource}),
  851:     NewAlice = connect_spec(NewSpec, sr_session, manual),
  852:     send_initial_presence(NewAlice),
  853:     %% ensure second C2S is registered so all the messages are bounced properly
  854:     sm_helper:wait_for_resource_count(NewAlice, 2),
  855:     ok = rpc(mim(), sys, terminate, [C2SPid, normal]),
  856:     {NewResource, NewAlice}.
  857: 
  858: unacknowledged_message_hook_offline(Config) ->
  859:     unacknowledged_message_hook_common(fun unacknowledged_message_hook_offline/4, Config).
  860: 
  861: unacknowledged_message_hook_offline(AliceSpec, Resource, _SMID, C2SPid) ->
  862:     C2SRef = erlang:monitor(process, C2SPid),
  863:     sm_helper:wait_for_process_termination(C2SRef),
  864:     %% reset the session, so old C2S process is stopped
  865:     NewAlice = connect_spec(AliceSpec, sr_session, manual),
  866:     %% wait for old C2S termination before send presence. other way
  867:     %% some of the latest unacknowledged messages can be bounced to
  868:     %% the new C2S process instead of going to the mod_offline storage.
  869:     %% looks like all the unacknowledged messages arrive to the new
  870:     %% C2S, but the message sequence is broken (the bounced messages
  871:     %% delivered before the messages from the mod_offline storage)
  872:     send_initial_presence(NewAlice),
  873:     {Resource, NewAlice}.
  874: 
  875: unacknowledged_message_hook_common(RestartConnectionFN, Config) ->
  876:     %% connect bob and alice
  877:     Bob = connect_fresh(Config, bob, presence),
  878: 
  879:     AliceSpec0 = escalus_fresh:create_fresh_user(Config, alice),
  880:     Resource = proplists:get_value(username, AliceSpec0),
  881:     AliceSpec = [{resource, Resource} | AliceSpec0],
  882:     HookHandlerExtra = start_hook_listener(Resource),
  883:     Alice = connect_spec(AliceSpec, sr_presence, manual),
  884:     %% Ack the presence stanza
  885:     get_ack(Alice),
  886:     ack_initial_presence(Alice),
  887: 
  888:     SMID = sm_helper:client_to_smid(Alice),
  889: 
  890:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"msg-1">>)),
  891:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"msg-2">>)),
  892:     %% kill alice connection
  893:     C2SPid = mongoose_helper:get_session_pid(Alice),
  894:     escalus_connection:kill(Alice),
  895:     sm_helper:wait_until_resume_session(C2SPid),
  896:     sm_helper:assert_alive_resources(Alice, 1),
  897: 
  898:     escalus:assert(is_chat_message, [<<"msg-1">>], wait_for_unacked_msg_hook(0, Resource, 100)),
  899:     escalus:assert(is_chat_message, [<<"msg-2">>], wait_for_unacked_msg_hook(0, Resource, 100)),
  900:     ?assertEqual(timeout, wait_for_unacked_msg_hook(0, Resource, 100)),
  901: 
  902:     %% send some messages and check if c2s can handle it
  903:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"msg-3">>)),
  904:     escalus_connection:send(Bob, escalus_stanza:chat_to_short_jid(Alice, <<"msg-4">>)),
  905:     escalus:assert(is_chat_message, [<<"msg-3">>], wait_for_unacked_msg_hook(0, Resource, 100)),
  906:     escalus:assert(is_chat_message, [<<"msg-4">>], wait_for_unacked_msg_hook(0, Resource, 100)),
  907:     ?assertEqual(timeout, wait_for_unacked_msg_hook(0, Resource, 100)),
  908: 
  909:     %% alice comes back and receives unacked message
  910:     {NewResource, NewAlice} = RestartConnectionFN(AliceSpec, Resource, SMID, C2SPid),
  911: 
  912:     mongoose_helper:wait_until(
  913:         fun() ->
  914:             Stanza = escalus_connection:get_stanza(NewAlice, msg),
  915:             escalus:assert(is_chat_message, [<<"msg-4">>], Stanza),
  916:             ok
  917:         end, ok),
  918: 
  919:     NewC2SPid = mongoose_helper:get_session_pid(NewAlice),
  920:     escalus_connection:kill(NewAlice),
  921:     sm_helper:wait_until_resume_session(NewC2SPid),
  922: 
  923:     escalus:assert(is_chat_message, [<<"msg-1">>], wait_for_unacked_msg_hook(1, NewResource, 100)),
  924:     escalus:assert(is_chat_message, [<<"msg-2">>], wait_for_unacked_msg_hook(1, NewResource, 100)),
  925:     escalus:assert(is_chat_message, [<<"msg-3">>], wait_for_unacked_msg_hook(1, NewResource, 100)),
  926:     escalus:assert(is_chat_message, [<<"msg-4">>], wait_for_unacked_msg_hook(1, NewResource, 100)),
  927:     ?assertEqual(timeout, wait_for_unacked_msg_hook(0, Resource, 100)),
  928:     stop_hook_listener(HookHandlerExtra),
  929:     escalus_connection:stop(Bob).
  930: 
  931: resume_session(Config) ->
  932:     AliceSpec = escalus_fresh:create_fresh_user(Config, alice),
  933:     Texts = three_texts(),
  934:     escalus:fresh_story(Config, [{bob, 1}], fun(Bob) ->
  935:         {_, SMID} = buffer_unacked_messages_and_die(Config, AliceSpec, Bob, Texts),
  936:         %% Resume the session.
  937:         Alice = connect_spec(AliceSpec, {resume, SMID, 1}, manual),
  938:         %% Alice receives the unacked messages from the previous
  939:         %% interrupted session.
  940:         sm_helper:wait_for_messages(Alice, Texts),
  941:         %% Alice acks the received messages.
  942:         escalus_connection:send(Alice, escalus_stanza:sm_ack(5)),
  943:         escalus_connection:stop(Alice)
  944:     end).
  945: 
  946: resume_session_with_wrong_h_does_not_leak_sessions(Config) ->
  947:     AliceSpec = escalus_fresh:create_fresh_user(Config, alice),
  948:     Messages = three_texts(),
  949:     HostType = host_type(),
  950:     escalus:fresh_story(Config, [{bob, 1}], fun(Bob) ->
  951:         {_, SMID} = buffer_unacked_messages_and_die(Config, AliceSpec, Bob, Messages),
  952:         %% Resume the session.
  953:         Alice = connect_spec(AliceSpec, auth, manual),
  954:         Resumed = sm_helper:try_to_resume_stream(Alice, SMID, 30),
  955:         escalus:assert(is_stream_error, [<<"undefined-condition">>, <<>>], Resumed),
  956:         escalus_connection:wait_for_close(Alice, timer:seconds(5)),
  957:         Fun = fun() ->
  958:                       [] = sm_helper:get_user_present_resources(Alice),
  959:                       sm_helper:get_sid_by_stream_id(HostType, SMID)
  960:               end,
  961:         mongoose_helper:wait_until(Fun, {error, smid_not_found}, #{name => smid_is_cleaned})
  962:     end).
  963: 
  964: resume_session_with_wrong_sid_returns_item_not_found(Config) ->
  965:     session_resumption_expects_item_not_found(Config, <<"wrong-sid">>).
  966: 
  967: resume_session_with_wrong_namespace_is_a_noop(Config) ->
  968:     Alice = connect_fresh(Config, alice, auth),
  969:     #xmlel{attrs = Attrs} = Resume = escalus_stanza:resume(<<"doesnt_matter">>, 4),
  970:     Attrs2 = lists:keyreplace(<<"xmlns">>, 1, Attrs, {<<"xmlns">>, <<"not-stream-mgnt">>}),
  971:     escalus_connection:send(Alice, Resume#xmlel{attrs = Attrs2}),
  972:     escalus_assert:has_no_stanzas(Alice),
  973:     [] = sm_helper:get_user_present_resources(Alice),
  974:     true = escalus_connection:is_connected(Alice),
  975:     escalus_connection:stop(Alice).
  976: 
  977: resume_dead_session_results_in_item_not_found(Config) ->
  978:     SMID = base64:encode(crypto:strong_rand_bytes(21)),
  979:     SID = {os:timestamp(), undefined},
  980:     HostType = host_type(),
  981:     rpc(mim(), ?MOD_SM, register_smid, [HostType, SMID, SID]),
  982:     session_resumption_expects_item_not_found(Config, SMID).
  983: 
  984: session_resumption_expects_item_not_found(Config, SMID) ->
  985:     Alice = connect_fresh(Config, alice, auth),
  986:     Resumed = sm_helper:try_to_resume_stream(Alice, SMID, 2),
  987:     escalus:assert(is_sm_failed, [<<"item-not-found">>], Resumed),
  988:     [] = sm_helper:get_user_present_resources(Alice),
  989:     true = escalus_connection:is_connected(Alice),
  990:     escalus_connection:stop(Alice).
  991: 
  992: resume_session_kills_old_C2S_gracefully(Config) ->
  993:     Alice = connect_fresh(Config, alice, sr_presence, manual),
  994:     C2SPid = mongoose_helper:get_session_pid(Alice),
  995: 
  996:     %% Monitor the C2S process and disconnect Alice.
  997:     MonitorRef = sm_helper:monitor_session(Alice),
  998:     escalus_client:kill_connection(Config, Alice),
  999: 
 1000:     %% Ensure the c2s process is waiting for resumption.
 1001:     sm_helper:wait_until_resume_session(C2SPid),
 1002: 
 1003:     %% Resume the session.
 1004:     NewAlice = connect_resume(Alice, 1),
 1005: 
 1006:     %% C2S process should die gracefully with Reason=normal.
 1007:     sm_helper:wait_for_process_termination(MonitorRef),
 1008:     escalus_connection:stop(NewAlice).
 1009: 
 1010: carboncopy_works(Config) ->
 1011:     escalus:fresh_story(Config, [{alice, 2}, {bob, 1}], fun(Alice1, Alice, Bob) ->
 1012:         mongoose_helper:enable_carbons([Alice1, Alice]),
 1013:         escalus_connection:send(Bob, escalus_stanza:chat_to(Alice1, <<"msg-4">>)),
 1014:         sm_helper:wait_for_messages(Alice1, [<<"msg-4">>]),
 1015:         carboncopy_helper:wait_for_carbon_chat_with_body(Alice, <<"msg-4">>, #{from => Bob, to => Alice1})
 1016:     end).
 1017: 
 1018: carboncopy_works_after_resume(Config) ->
 1019:     Texts = three_texts(),
 1020:     escalus:fresh_story(Config, [{alice, 1}, {bob, 1}], fun(Alice1, Bob) ->
 1021:         AliceSpec = [{resource, <<"res2">>} | sm_helper:client_to_spec(Alice1)],
 1022:         F = fun(Alice2) ->
 1023:             [escalus:assert(is_presence_with_type, [<<"available">>], escalus:wait_for_stanza(A)) || A <- [Alice1, Alice2]],
 1024:             mongoose_helper:enable_carbons([Alice1, Alice2])
 1025:             end,
 1026:         {_, SMID} = buffer_unacked_messages_and_die(Config, AliceSpec, Bob, Texts, F),
 1027:         %% Resume the session.
 1028:         Alice = connect_spec(AliceSpec, {resume, SMID, 1}, manual),
 1029:         wait_for_carbon_with_bodies(Alice1, Texts, #{from => Bob, to => Alice}),
 1030:         %% Get a presence from Alice1 again
 1031:         escalus:assert(is_presence_with_type, [<<"available">>], escalus:wait_for_stanza(Alice)),
 1032:         %% Alice receives an IQ result from the carbon copy enable request
 1033:         escalus:assert(is_iq_result, [], escalus:wait_for_stanza(Alice)),
 1034:         %% Alice receives the unacked messages from the previous
 1035:         %% interrupted session.
 1036:         sm_helper:wait_for_messages(Alice, Texts),
 1037:         %% Alice acks the received messages.
 1038:         escalus_connection:send(Alice, escalus_stanza:sm_ack(5)),
 1039:         %% Direct send
 1040:         escalus_connection:send(Bob, escalus_stanza:chat_to(Alice1, <<"msg-4">>)),
 1041:         sm_helper:wait_for_messages(Alice1, [<<"msg-4">>]),
 1042:         carboncopy_helper:wait_for_carbon_chat_with_body(Alice, <<"msg-4">>, #{from => Bob, to => Alice1}),
 1043:         escalus_connection:stop(Alice)
 1044:     end).
 1045: 
 1046: wait_for_carbon_with_bodies(Client, Texts, Params) ->
 1047:     [carboncopy_helper:wait_for_carbon_chat_with_body(Client, Text, Params) || Text <- Texts].
 1048: 
 1049: buffer_unacked_messages_and_die(Config, AliceSpec, Bob, Texts) ->
 1050:     F = fun(_Client) -> ok end,
 1051:     buffer_unacked_messages_and_die(Config, AliceSpec, Bob, Texts, F).
 1052: 
 1053: buffer_unacked_messages_and_die(Config, AliceSpec, Bob, Texts, F) ->
 1054:     Alice = connect_spec(AliceSpec, sr_presence, manual),
 1055:     F(Alice),
 1056:     C2SPid = mongoose_helper:get_session_pid(Alice),
 1057:     %% Bobs sends some messages to Alice.
 1058:     sm_helper:send_messages(Bob, Alice, Texts),
 1059:     %% Alice receives them, but doesn't ack.
 1060:     sm_helper:wait_for_messages(Alice, Texts),
 1061:     %% Alice's connection is violently terminated.
 1062:     escalus_client:kill_connection(Config, Alice),
 1063:     sm_helper:wait_until_resume_session(C2SPid),
 1064:     SMID = sm_helper:client_to_smid(Alice),
 1065:     {C2SPid, SMID}.
 1066: 
 1067: aggressively_pipelined_resume(Config) ->
 1068:     AliceSpec = [{manual_ack, true}, {parser_opts, [{start_tag, <<"stream:stream">>}]}
 1069:                  | escalus_fresh:create_fresh_user(Config, alice)],
 1070:     UnackedMessages = three_texts(),
 1071:     escalus:fresh_story(Config, [{bob, 1}], fun(Bob) ->
 1072:         {_, SMID} = buffer_unacked_messages_and_die(Config, AliceSpec, Bob, UnackedMessages),
 1073:         %% Resume the session.
 1074:         Alice = escalus_connection:connect(AliceSpec),
 1075: 
 1076:         Username = proplists:get_value(username, AliceSpec),
 1077:         Password = proplists:get_value(password, AliceSpec),
 1078:         Payload = <<0:8,Username/binary,0:8,Password/binary>>,
 1079:         Server = proplists:get_value(server, AliceSpec),
 1080: 
 1081:         Stream = escalus_stanza:stream_start(Server, <<"jabber:client">>),
 1082:         Auth = escalus_stanza:auth(<<"PLAIN">>, [#xmlcdata{content = base64:encode(Payload)}]),
 1083:         AuthStream = escalus_stanza:stream_start(Server, <<"jabber:client">>),
 1084:         Resume = escalus_stanza:resume(SMID, 2),
 1085: 
 1086:         escalus_client:send(Alice, [Stream, Auth, AuthStream, Resume]),
 1087:         Messages = [escalus_connection:get_stanza(Alice, {get_resumed, I}) || I <- lists:seq(1, 6)],
 1088:         escalus:assert(is_sm_resumed, [SMID], lists:last(Messages)),
 1089: 
 1090:         escalus_connection:stop(Alice)
 1091:     end).
 1092: 
 1093: %% This is a regression test for a case when a session processes a request, which will
 1094: %% receive a response from the server, i.e. will have the same origin SID in mongoose_acc.
 1095: %% Without proper handling, the reply would be rejected because the resumed session
 1096: %% has new SID.
 1097: replies_are_processed_by_resumed_session(Config) ->
 1098:     %% GIVEN a session and registered special IQ handler (added in init_per_testcase),
 1099:     %% that waits for old session process to terminate (at this point new process
 1100:     %% has fully taken over) and then actually sends the reply.
 1101:     Alice = connect_fresh(Config, alice, sr_presence),
 1102: 
 1103:     %% WHEN a client sends IQ request to the special handler...
 1104:     IQReq = escalus_stanza:iq_get(regression_ns(), []),
 1105:     escalus:send(Alice, IQReq),
 1106: 
 1107:     %% ... goes down and session is resumed.
 1108:     Alice2 = sm_helper:kill_and_connect_resume(Alice),
 1109: 
 1110:     %% THEN the client receives the reply properly.
 1111:     IQReply = escalus:wait_for_stanza(Alice2),
 1112:     escalus:assert(is_iq_result, [IQReq], IQReply),
 1113:     escalus_connection:stop(Alice2).
 1114: 
 1115: %% This is a regression test for a bug, which manifested in following scenario
 1116: %% (due to improper presence sub requests buffering):
 1117: %% 1. Bob is online, Alice is offline
 1118: %% 2. Bob subscribes to Alice's presence;
 1119: %% 3. Alice becomes online
 1120: %% 4. Bob sends a message to Alice
 1121: %% 5. Alice doesn't SM-ack the request or message, terminates the connection
 1122: %% 6. Alice reconnects but with session *replace*, not resume
 1123: %% 7. Packet rerouting crashes on the buffered sub request, preventing resending whole buffer
 1124: %% 8. Alice doesn't receive the buffered message
 1125: subscription_requests_are_buffered_properly(Config) ->
 1126:     AliceSpec = escalus_fresh:create_fresh_user(Config, alice),
 1127:     MsgBody = <<"buffered">>,
 1128:     escalus:fresh_story(Config, [{bob, 1}], fun(Bob) ->
 1129:         % GIVEN Bob's pending subscription to Alice's presence
 1130:         AliceJid = common_helper:get_bjid(AliceSpec),
 1131:         escalus:send(Bob, escalus_stanza:presence_direct(AliceJid, <<"subscribe">>)),
 1132:         _RosterPushReq = escalus:wait_for_stanza(Bob),
 1133: 
 1134:         % WHEN Alice becomes online...
 1135:         Alice = connect_spec(AliceSpec, sr_session, manual),
 1136:         send_initial_presence(Alice),
 1137:         %% subscribe could come before the initial presence
 1138:         escalus:assert_many([is_presence(<<"available">>), is_presence(<<"subscribe">>)],
 1139:                             escalus:wait_for_stanzas(Alice, 2)),
 1140: 
 1141:         % ...and Bob sends a message to Alice...
 1142:         escalus:send(Bob, escalus_stanza:chat_to(Alice, MsgBody)),
 1143:         MsgStanza = escalus:wait_for_stanza(Alice),
 1144:         escalus:assert(is_chat_message, [MsgBody], MsgStanza),
 1145: 
 1146:         % ...and Alice terminates connection without acking anything...
 1147:         escalus_client:kill_connection(Config, Alice),
 1148: 
 1149:         % ...and reconnects with session replacement.
 1150:         Alice2 = connect_spec(AliceSpec, session, manual),
 1151: 
 1152:         % THEN Alice receives (without sending initial presence):
 1153:         % * buffered Bob's message (like above)
 1154:         % Alice DOESN'T receive:
 1155:         % * buffered subscription request because it is dropped by ejabberd_sm
 1156:         %   because it's treated like repeated sub request to bare JID, so it's not
 1157:         %   processed by any sub req handler (like mod_roster)
 1158:         % * buffered available presence from Alice - because it is addressed to another SID
 1159:         %   and Alice2 is a brand new session
 1160:         escalus:assert(is_chat_message, [MsgBody], escalus:wait_for_stanza(Alice2)),
 1161:         sm_helper:send_and_receive(Bob, Alice2, <<"flush1">>),
 1162:         escalus_assert:has_no_stanzas(Alice2),
 1163: 
 1164:         %% Only once an initial presence is sent, a subscription request is sent
 1165:         send_initial_presence(Alice2),
 1166:         escalus:assert_many([is_presence(<<"available">>), is_presence(<<"subscribe">>)],
 1167:                             escalus:wait_for_stanzas(Alice2, 2)),
 1168: 
 1169:         sm_helper:send_and_receive(Bob, Alice2, <<"flush2">>),
 1170:         escalus_assert:has_no_stanzas(Alice2),
 1171: 
 1172:         escalus_connection:stop(Alice2)
 1173:     end).
 1174: 
 1175: %% This is a regression test for a bug, due to which messages sent to old session
 1176: %% in a middle of state handover were not appended properly to SM buffer.
 1177: %% Scenario to reproduce:
 1178: %% 1. Online Bob and Alice
 1179: %% 2. Alice kills the connection
 1180: %% 3. Alice's session is suspended
 1181: %% 4. Alice resumes session with new connection. At this moment new session is still not
 1182: %%    present in session table. `resume` request is stuck in old proc mailbox.
 1183: %% 5. Bob sends a message to Alice. Only old proc is present in session table so now
 1184: %%    old session has two messages in mailbox: `resume` and XML from Bob
 1185: %% 6. We resume old process and it begins session handover
 1186: %% 7. Bob's message is appended to SM buffer in "flush" step
 1187: %% 8. With bug fixed, the message is retransmitted properly
 1188: messages_are_properly_flushed_during_resumption(Config) ->
 1189:     escalus:fresh_story(Config, [{bob, 1}], fun(Bob) ->
 1190:         % GIVEN (online Bob) and (Alice in resume state); Alice's session is suspended
 1191:         Alice = connect_fresh(Config, alice, sr_presence),
 1192:         SMH = escalus_connection:get_sm_h(Alice),
 1193:         escalus_client:kill_connection(Config, Alice),
 1194:         %% The receiver process would stop now
 1195:         C2SPid = mongoose_helper:get_session_pid(Alice),
 1196:         sm_helper:wait_until_resume_session(C2SPid),
 1197: 
 1198:         sm_helper:wait_for_queue_length(C2SPid, 0),
 1199:         ok = rpc(mim(), sys, suspend, [C2SPid]),
 1200: 
 1201:         % WHEN new session requests resumption
 1202:         % we wait until that old session has resumption request enqueued;
 1203:         % we need it to ensure the order of messages: resume first, Bob's chat second.
 1204:         % Actual wait and message sent by Bob is done in separate process
 1205:         % because new client start will block until old process is resumed
 1206: 
 1207:         MsgBody = <<"flush-regression">>,
 1208:         spawn_link(fun() ->
 1209:                       sm_helper:wait_for_queue_length(C2SPid, 1),
 1210: 
 1211:                       % Bob sends a message...
 1212:                       escalus:send(Bob, escalus_stanza:chat_to(Alice, MsgBody)),
 1213: 
 1214:                       % ...we ensure that a message is enqueued in Alice's session...
 1215:                       % (2 messages = resume request + Bob's message)
 1216:                       sm_helper:wait_for_queue_length(C2SPid, 2),
 1217: 
 1218:                       % ...and old process is resumed.
 1219:                       ok = rpc(mim(), sys, resume, [C2SPid])
 1220:               end),
 1221:         Alice2 = connect_resume(Alice, SMH),
 1222:         % THEN Alice's new session receives Bob's message
 1223:         RecvMsg = escalus:wait_for_stanza(Alice2),
 1224:         escalus:assert(is_chat_message, [MsgBody], RecvMsg)
 1225:       end).
 1226: 
 1227: no_crash_if_stream_mgmt_disabled_but_client_requests_stream_mgmt(Config) ->
 1228:     Alice = connect_fresh(Config, alice, session, manual),
 1229:     %% Should not crash anything!
 1230:     escalus_connection:send(Alice, escalus_stanza:enable_sm()),
 1231:     Response = escalus_connection:get_stanza(Alice, service_unavailable),
 1232:     escalus:assert(is_sm_failed, [<<"feature-not-implemented">>], Response),
 1233:     escalus_connection:stop(Alice).
 1234: 
 1235: no_crash_if_stream_mgmt_disabled_but_client_requests_stream_mgmt_with_resumption(Config) ->
 1236:     Alice = connect_fresh(Config, alice, session, manual),
 1237:     %% Should not crash anything!
 1238:     escalus_connection:send(Alice, escalus_stanza:enable_sm([resume])),
 1239:     Response = escalus_connection:get_stanza(Alice, service_unavailable),
 1240:     escalus:assert(is_sm_failed, [<<"feature-not-implemented">>], Response),
 1241:     escalus_connection:stop(Alice).
 1242: 
 1243: %%--------------------------------------------------------------------
 1244: %% Helpers
 1245: %%--------------------------------------------------------------------
 1246: start_hook_listener(Resource) ->
 1247:     TestCasePid = self(),
 1248:     rpc(mim(), ?MODULE, rpc_start_hook_handler, [TestCasePid, Resource, host_type()]).
 1249: 
 1250: stop_hook_listener(HookExtra) ->
 1251:     rpc(mim(), ?MODULE, rpc_stop_hook_handler, [HookExtra, host_type()]).
 1252: 
 1253: rpc_start_hook_handler(TestCasePid, User, HostType) ->
 1254:     LUser = jid:nodeprep(User),
 1255:     Extra = #{luser => LUser, pid => TestCasePid},
 1256:     gen_hook:add_handler(unacknowledged_message, HostType,
 1257:                          fun ?MODULE:hook_handler_fn/3,
 1258:                          Extra, 50),
 1259:     Extra.
 1260: 
 1261: rpc_stop_hook_handler(HookExtra, HostType) ->
 1262:     gen_hook:delete_handler(unacknowledged_message, HostType,
 1263:                             fun ?MODULE:hook_handler_fn/3,
 1264:                             HookExtra, 50).
 1265: 
 1266: hook_handler_fn(Acc,
 1267:                 #{jid := Jid} = _Params,
 1268:                 #{luser := LUser, pid := TestCasePid} = _Extra) ->
 1269:     {U, _S, R} = jid:to_lower(Jid),
 1270:     case U of
 1271:         LUser ->
 1272:             Counter = mongoose_acc:get(sm_test, counter, 0, Acc),
 1273:             El = mongoose_acc:element(Acc),
 1274:             TestCasePid ! {sm_test, Counter, R, El},
 1275:             {ok, mongoose_acc:set_permanent(sm_test, counter, Counter + 1, Acc)};
 1276:         _ -> {ok, Acc}
 1277:     end.
 1278: 
 1279: wait_for_unacked_msg_hook(Counter, Res, Timeout) ->
 1280:     receive
 1281:         {sm_test, AccCounter, Resource, Stanza} = Msg ->
 1282:             ?assertEqual(Counter, AccCounter, Msg),
 1283:             ?assertEqual(Res, Resource, Msg),
 1284:             Stanza
 1285:     after Timeout ->
 1286:         timeout
 1287:     end.
 1288: 
 1289: start_filter_hook_listener(FilterText, Resource) ->
 1290:     rpc(mim(), ?MODULE, rpc_start_filter_hook_handler, [FilterText, Resource, host_type()]).
 1291: 
 1292: stop_filter_hook_listener(HookExtra) ->
 1293:     rpc(mim(), ?MODULE, rpc_stop_filter_hook_handler, [HookExtra, host_type()]).
 1294: 
 1295: rpc_start_filter_hook_handler(FilterText, User, HostType) ->
 1296:     LUser = jid:nodeprep(User),
 1297:     Extra = #{luser => LUser, filter_text => FilterText},
 1298:     gen_hook:add_handler(filter_unacknowledged_messages, HostType,
 1299:                          fun ?MODULE:filter_hook_handler_fn/3,
 1300:                          Extra, 50),
 1301:     Extra.
 1302: 
 1303: rpc_stop_filter_hook_handler(HookExtra, HostType) ->
 1304:     gen_hook:delete_handler(filter_unacknowledged_messages, HostType,
 1305:                             fun ?MODULE:filter_hook_handler_fn/3,
 1306:                             HookExtra, 50).
 1307: 
 1308: filter_hook_handler_fn(Buffer,
 1309:                        #{jid := Jid} = _Params,
 1310:                        #{luser := LUser, filter_text := FilterText} = _Extra) ->
 1311:     {U, _} = jid:to_lus(Jid),
 1312:     case U of
 1313:         LUser ->
 1314:             F = fun(Acc) -> filter_text(Acc, FilterText) end,
 1315:             NewBuffer = lists:filter(F, Buffer),
 1316:             {ok, NewBuffer};
 1317:         _ -> {ok, Buffer}
 1318:     end.
 1319: 
 1320: filter_text(Acc, FilterText) ->
 1321:     case mongoose_acc:stanza_name(Acc) of
 1322:         <<"message">> ->
 1323:             El = mongoose_acc:element(Acc),
 1324:             FilterText =/= exml_query:path(El, [{element, <<"body">>}, cdata]);
 1325:         _ ->
 1326:             true
 1327:     end.
 1328: 
 1329: is_chat(Content) ->
 1330:     fun(Stanza) -> escalus_pred:is_chat_message(Content, Stanza) end.
 1331: 
 1332: is_presence(Type) ->
 1333:     fun(Stanza) -> escalus_pred:is_presence_with_type(Type, Stanza) end.
 1334: 
 1335: three_texts() ->
 1336:     [<<"msg-1">>, <<"msg-2">>, <<"msg-3">>].
 1337: 
 1338: get_stanzas_filtered_by_mod_ping() ->
 1339:     History = rpc(mim(), meck, history, [mod_ping]),
 1340:     [Stanza ||
 1341:         {_Pid,
 1342:          {_Mod,
 1343:           filter_local_packet = _Func,
 1344:           [{_, _, _, Stanza} = _Acc, _Params, _Extra] = _Args
 1345:          },
 1346:          {stop, drop} = _Result
 1347:         } <- History
 1348:     ].
 1349: %%--------------------------------------------------------------------
 1350: %% IQ handler necessary for reproducing "replies_are_processed_by_resumed_session"
 1351: %%--------------------------------------------------------------------
 1352: 
 1353: regression_ns() ->
 1354:     <<"regression">>.
 1355: 
 1356: register_handler() ->
 1357:     HostType = host_type(),
 1358:     rpc(mim(), gen_iq_handler, add_iq_handler_for_domain,
 1359:         [HostType, regression_ns(), ejabberd_sm,
 1360:          fun ?MODULE:regression_handler/5, #{}, one_queue]).
 1361: 
 1362: unregister_handler() ->
 1363:     HostType = host_type(),
 1364:     rpc(mim(), gen_iq_handler, remove_iq_handler_for_domain,
 1365:         [HostType, regression_ns(), ejabberd_sm]).
 1366: 
 1367: regression_handler(Acc, _From, _To, IQ, _Extra) ->
 1368:     %% A bit of a hack - will no longer work when the SID format changes
 1369:     {_, Pid} = mongoose_acc:get(c2s, origin_sid, undefined, Acc),
 1370:     erlang:monitor(process, Pid),
 1371:     receive
 1372:         {'DOWN', _, _, _, _} ->
 1373:             ok
 1374:     after
 1375:         10000 ->
 1376:             error({c2s_not_stopped_after_timeout, Pid})
 1377:     end,
 1378:     %% We avoid another race condition - there is a short window where user session
 1379:     %% is not registered in ejabberd_sm: between old process termination and the moment
 1380:     %% when the new process stores new session in memory. It should be fixed separately.
 1381:     wait_for_session(mongoose_acc:get(c2s, origin_jid, undefined, Acc), 50, 100),
 1382:     {Acc, jlib:make_result_iq_reply(IQ)}.
 1383: 
 1384: wait_for_session(JID, Retries, SleepTime) ->
 1385:     case ejabberd_sm:get_session(JID) of
 1386:         offline ->
 1387:             timer:sleep(SleepTime),
 1388:             wait_for_session(JID, Retries - 1, SleepTime);
 1389:         _ ->
 1390:             ok
 1391:     end.
 1392: 
 1393: maybe_ack_initial_presence(Alice, ack) ->
 1394:     ack_initial_presence(Alice);
 1395: maybe_ack_initial_presence(_Alice, no_ack) ->
 1396:     ok.