%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2011. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
%% Description: Tests supervisor.erl
-module(supervisor_SUITE).
-include_lib("test_server/include/test_server.hrl").
%% Testserver specific export
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2, init_per_testcase/2,
end_per_testcase/2]).
%% Indirect spawn export
-export([init/1]).
%% API tests
-export([ sup_start_normal/1, sup_start_ignore_init/1,
sup_start_ignore_child/1, sup_start_error_return/1,
sup_start_fail/1, sup_stop_infinity/1,
sup_stop_timeout/1, sup_stop_brutal_kill/1, child_adm/1,
child_adm_simple/1, child_specs/1, extra_return/1]).
%% Tests concept permanent, transient and temporary
-export([ permanent_normal/1, transient_normal/1,
temporary_normal/1,
permanent_abnormal/1, transient_abnormal/1,
temporary_abnormal/1]).
%% Restart strategy tests
-export([ one_for_one/1,
one_for_one_escalation/1, one_for_all/1,
one_for_all_escalation/1,
simple_one_for_one/1, simple_one_for_one_escalation/1,
rest_for_one/1, rest_for_one_escalation/1,
simple_one_for_one_extra/1]).
%% Misc tests
-export([child_unlink/1, tree/1, count_children_memory/1,
do_not_save_start_parameters_for_temporary_children/1]).
%-------------------------------------------------------------------------
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[{group, sup_start}, {group, sup_stop}, child_adm,
child_adm_simple, extra_return, child_specs,
{group, restart_one_for_one},
{group, restart_one_for_all},
{group, restart_simple_one_for_one},
{group, restart_rest_for_one},
{group, normal_termination},
{group, abnormal_termination}, child_unlink, tree,
count_children_memory, do_not_save_start_parameters_for_temporary_children].
groups() ->
[{sup_start, [],
[sup_start_normal, sup_start_ignore_init,
sup_start_ignore_child, sup_start_error_return,
sup_start_fail]},
{sup_stop, [],
[sup_stop_infinity, sup_stop_timeout,
sup_stop_brutal_kill]},
{normal_termination, [],
[permanent_normal, transient_normal, temporary_normal]},
{abnormal_termination, [],
[permanent_abnormal, transient_abnormal,
temporary_abnormal]},
{restart_one_for_one, [],
[one_for_one, one_for_one_escalation]},
{restart_one_for_all, [],
[one_for_all, one_for_all_escalation]},
{restart_simple_one_for_one, [],
[simple_one_for_one, simple_one_for_one_extra,
simple_one_for_one_escalation]},
{restart_rest_for_one, [],
[rest_for_one, rest_for_one_escalation]}].
init_per_suite(Config) ->
Config.
end_per_suite(_Config) ->
ok.
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
init_per_testcase(count_children_memory, Config) ->
MemoryState = erlang:system_info(allocator),
case count_children_allocator_test(MemoryState) of
true -> Config;
false ->
{skip, "+Meamin used during test; erlang:memory/1 not available"}
end;
init_per_testcase(_Case, Config) ->
Config.
end_per_testcase(_Case, _Config) ->
ok.
start(InitResult) ->
supervisor:start_link({local, sup_test}, ?MODULE, InitResult).
%% Simulate different supervisors callback.
init(fail) ->
erlang:error({badmatch,2});
init(InitResult) ->
InitResult.
%% Respect proplist return of supervisor:count_children
get_child_counts(Supervisor) ->
Counts = supervisor:count_children(Supervisor),
[proplists:get_value(specs, Counts),
proplists:get_value(active, Counts),
proplists:get_value(supervisors, Counts),
proplists:get_value(workers, Counts)].
%-------------------------------------------------------------------------
% Test cases starts here.
%-------------------------------------------------------------------------
sup_start_normal(doc) ->
["Tests that the supervisor process starts correctly and that it "
"can be terminated gracefully."];
sup_start_normal(suite) -> [];
sup_start_normal(Config) when is_list(Config) ->
process_flag(trap_exit, true),
?line {ok, Pid} = start({ok, {{one_for_one, 2, 3600}, []}}),
?line exit(Pid, shutdown),
receive
{'EXIT', Pid, shutdown} ->
ok;
{'EXIT', Pid, Else} ->
?line test_server:fail({bad_exit_reason, Else})
after
2000 ->
?line test_server:fail(no_exit_reason)
end,
ok.
%-------------------------------------------------------------------------
sup_start_ignore_init(doc) ->
["Tests what happens if init-callback returns ignore"];
sup_start_ignore_init(suite) -> [];
sup_start_ignore_init(Config) when is_list(Config) ->
process_flag(trap_exit, true),
?line ignore = start(ignore),
receive
{'EXIT', _Pid, normal} ->
ok;
{'EXIT', _Pid, Else} ->
?line test_server:fail({bad_exit_reason, Else})
after
2000 ->
?line test_server:fail(no_exit_reason)
end,
ok.
%-------------------------------------------------------------------------
sup_start_ignore_child(doc) ->
["Tests what happens if init-callback returns ignore"];
sup_start_ignore_child(suite) -> [];
sup_start_ignore_child(Config) when is_list(Config) ->
process_flag(trap_exit, true),
?line {ok, _Pid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child1 = {child1, {supervisor_1, start_child, [ignore]},
permanent, 1000, worker, []},
Child2 = {child2, {supervisor_1, start_child, []}, permanent,
1000, worker, []},
?line {ok, undefined} = supervisor:start_child(sup_test, Child1),
?line {ok, CPid2} = supervisor:start_child(sup_test, Child2),
?line [{child2, CPid2, worker, []},{child1, undefined, worker, []}]
= supervisor:which_children(sup_test),
?line [2,1,0,2] = get_child_counts(sup_test),
ok.
%-------------------------------------------------------------------------
sup_start_error_return(doc) ->
["Tests what happens if init-callback returns a invalid value"];
sup_start_error_return(suite) -> [];
sup_start_error_return(Config) when is_list(Config) ->
process_flag(trap_exit, true),
?line {error, Term} = start(invalid),
receive
{'EXIT', _Pid, Term} ->
ok;
{'EXIT', _Pid, Else} ->
?line test_server:fail({bad_exit_reason, Else})
after
2000 ->
?line test_server:fail(no_exit_reason)
end,
ok.
%-------------------------------------------------------------------------
sup_start_fail(doc) ->
["Tests what happens if init-callback fails"];
sup_start_fail(suite) -> [];
sup_start_fail(Config) when is_list(Config) ->
process_flag(trap_exit, true),
?line {error, Term} = start(fail),
receive
{'EXIT', _Pid, Term} ->
ok;
{'EXIT', _Pid, Else} ->
?line test_server:fail({bad_exit_reason, Else})
after
2000 ->
?line test_server:fail(no_exit_reason)
end,
ok.
%-------------------------------------------------------------------------
sup_stop_infinity(doc) ->
["See sup_stop/1 when Shutdown = infinity, this walue is only allowed "
"for children of type supervisor"];
sup_stop_infinity(suite) -> [];
sup_stop_infinity(Config) when is_list(Config) ->
process_flag(trap_exit, true),
?line {ok, Pid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child1 = {child1, {supervisor_1, start_child, []},
permanent, infinity, supervisor, []},
Child2 = {child2, {supervisor_1, start_child, []}, permanent,
infinity, worker, []},
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
link(CPid1),
?line {error, {invalid_shutdown,infinity}} =
supervisor:start_child(sup_test, Child2),
?line exit(Pid, shutdown),
receive
{'EXIT', Pid, shutdown} ->
ok;
{'EXIT', Pid, Else} ->
?line test_server:fail({bad_exit_reason, Else})
after
5000 ->
?line test_server:fail(no_exit_reason)
end,
receive
{'EXIT', CPid1, shutdown} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
after
2000 -> ?line test_server:fail(no_exit_reason)
end,
ok.
%-------------------------------------------------------------------------
sup_stop_timeout(doc) ->
["See sup_stop/1 when Shutdown = 1000"];
sup_stop_timeout(suite) -> [];
sup_stop_timeout(Config) when is_list(Config) ->
process_flag(trap_exit, true),
?line {ok, Pid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child1 = {child1, {supervisor_1, start_child, []},
permanent, 1000, worker, []},
Child2 = {child2, {supervisor_1, start_child, []}, permanent,
1000, worker, []},
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
link(CPid1),
?line {ok, CPid2} = supervisor:start_child(sup_test, Child2),
link(CPid2),
CPid2 ! {sleep, 200000},
?line exit(Pid, shutdown),
receive
{'EXIT', Pid, shutdown} ->
ok;
{'EXIT', Pid, Else} ->
?line test_server:fail({bad_exit_reason, Else})
after
5000 ->
?line test_server:fail(no_exit_reason)
end,
receive
{'EXIT', CPid1, shutdown} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason,Reason})
after
2000 -> ?line test_server:fail(no_exit_reason)
end,
receive
{'EXIT', CPid2, killed} -> ok;
{'EXIT', CPid2, Reason2} ->
?line test_server:fail({bad_exit_reason, Reason2})
after
2000 -> ?line test_server:fail(no_exit_reason)
end,
ok.
%-------------------------------------------------------------------------
sup_stop_brutal_kill(doc) ->
["See sup_stop/1 when Shutdown = brutal_kill"];
sup_stop_brutal_kill(suite) -> [];
sup_stop_brutal_kill(Config) when is_list(Config) ->
process_flag(trap_exit, true),
?line {ok, Pid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child1 = {child1, {supervisor_1, start_child, []},
permanent, 1000, worker, []},
Child2 = {child2, {supervisor_1, start_child, []}, permanent,
brutal_kill, worker, []},
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
link(CPid1),
?line {ok, CPid2} = supervisor:start_child(sup_test, Child2),
link(CPid2),
?line exit(Pid, shutdown),
receive
{'EXIT', Pid, shutdown} ->
ok;
{'EXIT', Pid, Else} ->
?line test_server:fail({bad_exit_reason, Else})
after
5000 ->
?line test_server:fail(no_exit_reason)
end,
receive
{'EXIT', CPid1, shutdown} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
after
2000 -> ?line test_server:fail(no_exit_reason)
end,
receive
{'EXIT', CPid2, killed} -> ok;
{'EXIT', CPid2, Reason2} ->
?line test_server:fail({bad_exit_reason, Reason2})
after
2000 -> ?line test_server:fail(no_exit_reason)
end,
ok.
%-------------------------------------------------------------------------
extra_return(doc) ->
["The start function provided to start a child may "
"return {ok, Pid} or {ok, Pid, Info}, if it returns "
"the later check that the supervisor ignores the Info, "
"and includes it unchanged in return from start_child/2 "
"and restart_child/2"];
extra_return(suite) -> [];
extra_return(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child = {child1, {supervisor_1, start_child, [extra_return]},
permanent, 1000,
worker, []},
?line {ok, _Pid} = start({ok, {{one_for_one, 2, 3600}, [Child]}}),
?line [{child1, CPid, worker, []}] = supervisor:which_children(sup_test),
link(CPid),
?line {error, not_found} = supervisor:terminate_child(sup_test, hej),
?line {error, not_found} = supervisor:delete_child(sup_test, hej),
?line {error, not_found} = supervisor:restart_child(sup_test, hej),
?line {error, running} = supervisor:delete_child(sup_test, child1),
?line {error, running} = supervisor:restart_child(sup_test, child1),
?line [{child1, CPid, worker, []}] = supervisor:which_children(sup_test),
?line [1,1,0,1] = get_child_counts(sup_test),
?line ok = supervisor:terminate_child(sup_test, child1),
receive
{'EXIT', CPid, shutdown} -> ok;
{'EXIT', CPid, Reason} ->
?line test_server:fail({bad_reason, Reason})
after 1000 ->
?line test_server:fail(no_child_termination)
end,
?line [{child1,undefined,worker,[]}] = supervisor:which_children(sup_test),
?line [1,0,0,1] = get_child_counts(sup_test),
?line {ok, CPid2,extra_return} =
supervisor:restart_child(sup_test, child1),
?line [{child1, CPid2, worker, []}] = supervisor:which_children(sup_test),
?line [1,1,0,1] = get_child_counts(sup_test),
?line ok = supervisor:terminate_child(sup_test, child1),
?line ok = supervisor:terminate_child(sup_test, child1),
?line ok = supervisor:delete_child(sup_test, child1),
?line {error, not_found} = supervisor:restart_child(sup_test, child1),
?line [] = supervisor:which_children(sup_test),
?line [0,0,0,0] = get_child_counts(sup_test),
?line {ok, CPid3, extra_return} = supervisor:start_child(sup_test, Child),
?line [{child1, CPid3, worker, []}] = supervisor:which_children(sup_test),
?line [1,1,0,1] = get_child_counts(sup_test),
ok.
%-------------------------------------------------------------------------
child_adm(doc)->
["Test API functions start_child/2, terminate_child/2, delete_child/2 "
"restart_child/2, which_children/1, count_children/1. Only correct "
"childspecs are used, handling of incorrect childspecs is tested in "
"child_specs/1"];
child_adm(suite) -> [];
child_adm(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child = {child1, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
?line {ok, _Pid} = start({ok, {{one_for_one, 2, 3600}, [Child]}}),
?line [{child1, CPid, worker, []}] = supervisor:which_children(sup_test),
?line [1,1,0,1] = get_child_counts(sup_test),
link(CPid),
%% Start of an already runnig process
?line {error,{already_started, CPid}} =
supervisor:start_child(sup_test, Child),
%% Termination
?line {error, not_found} = supervisor:terminate_child(sup_test, hej),
?line {'EXIT',{noproc,{gen_server,call, _}}} =
(catch supervisor:terminate_child(foo, child1)),
?line ok = supervisor:terminate_child(sup_test, child1),
receive
{'EXIT', CPid, shutdown} -> ok;
{'EXIT', CPid, Reason} ->
?line test_server:fail({bad_reason, Reason})
after 1000 ->
?line test_server:fail(no_child_termination)
end,
?line [{child1,undefined,worker,[]}] = supervisor:which_children(sup_test),
?line [1,0,0,1] = get_child_counts(sup_test),
%% Like deleting something that does not exist, it will succeed!
?line ok = supervisor:terminate_child(sup_test, child1),
%% Start of already existing but not running process
?line {error,already_present} =
supervisor:start_child(sup_test, Child),
%% Restart
?line {ok, CPid2} = supervisor:restart_child(sup_test, child1),
?line [{child1, CPid2, worker, []}] = supervisor:which_children(sup_test),
?line [1,1,0,1] = get_child_counts(sup_test),
?line {error, running} = supervisor:restart_child(sup_test, child1),
?line {error, not_found} = supervisor:restart_child(sup_test, child2),
%% Deletion
?line {error, running} = supervisor:delete_child(sup_test, child1),
?line {error, not_found} = supervisor:delete_child(sup_test, hej),
?line {'EXIT',{noproc,{gen_server,call, _}}} =
(catch supervisor:delete_child(foo, child1)),
?line ok = supervisor:terminate_child(sup_test, child1),
?line ok = supervisor:delete_child(sup_test, child1),
?line {error, not_found} = supervisor:restart_child(sup_test, child1),
?line [] = supervisor:which_children(sup_test),
?line [0,0,0,0] = get_child_counts(sup_test),
%% Start
?line {'EXIT',{noproc,{gen_server,call, _}}} =
(catch supervisor:start_child(foo, Child)),
?line {ok, CPid3} = supervisor:start_child(sup_test, Child),
?line [{child1, CPid3, worker, []}] = supervisor:which_children(sup_test),
?line [1,1,0,1] = get_child_counts(sup_test),
?line {'EXIT',{noproc,{gen_server,call,[foo,which_children,infinity]}}}
= (catch supervisor:which_children(foo)),
?line {'EXIT',{noproc,{gen_server,call,[foo,count_children,infinity]}}}
= (catch supervisor:count_children(foo)),
ok.
%-------------------------------------------------------------------------
child_adm_simple(doc) ->
["The API functions terminate_child/2, delete_child/2 "
"restart_child/2 are not valid for a simple_one_for_one supervisor "
"check that the correct error message is returned."];
child_adm_simple(suite) -> [];
child_adm_simple(Config) when is_list(Config) ->
Child = {child, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
?line {ok, _Pid} = start({ok, {{simple_one_for_one, 2, 3600}, [Child]}}),
%% In simple_one_for_one all children are added dynamically
?line [] = supervisor:which_children(sup_test),
?line [1,0,0,0] = get_child_counts(sup_test),
%% Start
?line {'EXIT',{noproc,{gen_server,call, _}}} =
(catch supervisor:start_child(foo, [])),
?line {ok, CPid1} = supervisor:start_child(sup_test, []),
?line [{undefined, CPid1, worker, []}] =
supervisor:which_children(sup_test),
?line [1,1,0,1] = get_child_counts(sup_test),
?line {ok, CPid2} = supervisor:start_child(sup_test, []),
?line Children = supervisor:which_children(sup_test),
?line 2 = length(Children),
?line true = lists:member({undefined, CPid2, worker, []}, Children),
?line true = lists:member({undefined, CPid1, worker, []}, Children),
?line [1,2,0,2] = get_child_counts(sup_test),
%% Termination
?line {error, simple_one_for_one} =
supervisor:terminate_child(sup_test, child1),
%% Restart
?line {error, simple_one_for_one} =
supervisor:restart_child(sup_test, child1),
%% Deletion
?line {error, simple_one_for_one} =
supervisor:delete_child(sup_test, child1),
ok.
%-------------------------------------------------------------------------
child_specs(doc) ->
["Tests child specs, invalid formats should be rejected."];
child_specs(suite) -> [];
child_specs(Config) when is_list(Config) ->
process_flag(trap_exit, true),
?line {ok, _Pid} = start({ok, {{one_for_one, 2, 3600}, []}}),
?line {error, _} = supervisor:start_child(sup_test, hej),
%% Bad child specs
B1 = {child, mfa, permanent, 1000, worker, []},
B2 = {child, {m,f,[a]}, prmanent, 1000, worker, []},
B3 = {child, {m,f,[a]}, permanent, -10, worker, []},
B4 = {child, {m,f,[a]}, permanent, 10, wrker, []},
B5 = {child, {m,f,[a]}, permanent, infinity, worker, []},
B6 = {child, {m,f,[a]}, permanent, 1000, worker, dy},
B7 = {child, {m,f,[a]}, permanent, 1000, worker, [1,2,3]},
%% Correct child specs!
%% <Modules> (last parameter in a child spec) can be [] as we do
%% not test code upgrade here.
C1 = {child, {m,f,[a]}, permanent, infinity, supervisor, []},
C2 = {child, {m,f,[a]}, permanent, 1000, supervisor, []},
C3 = {child, {m,f,[a]}, temporary, 1000, worker, dynamic},
C4 = {child, {m,f,[a]}, transient, 1000, worker, [m]},
?line {error, {invalid_mfa,mfa}} = supervisor:start_child(sup_test, B1),
?line {error, {invalid_restart_type, prmanent}} =
supervisor:start_child(sup_test, B2),
?line {error, {invalid_shutdown,-10}}
= supervisor:start_child(sup_test, B3),
?line {error, {invalid_child_type,wrker}}
= supervisor:start_child(sup_test, B4),
?line {error, _} = supervisor:start_child(sup_test, B5),
?line {error, {invalid_modules,dy}}
= supervisor:start_child(sup_test, B6),
?line {error, {invalid_mfa,mfa}} = supervisor:check_childspecs([B1]),
?line {error, {invalid_restart_type,prmanent}} =
supervisor:check_childspecs([B2]),
?line {error, {invalid_shutdown,-10}} = supervisor:check_childspecs([B3]),
?line {error, {invalid_child_type,wrker}}
= supervisor:check_childspecs([B4]),
?line {error, _} = supervisor:check_childspecs([B5]),
?line {error, {invalid_modules,dy}} = supervisor:check_childspecs([B6]),
?line {error, {invalid_module, 1}} =
supervisor:check_childspecs([B7]),
?line ok = supervisor:check_childspecs([C1]),
?line ok = supervisor:check_childspecs([C2]),
?line ok = supervisor:check_childspecs([C3]),
?line ok = supervisor:check_childspecs([C4]),
ok.
%-------------------------------------------------------------------------
permanent_normal(doc) ->
["A permanent child should always be restarted"];
permanent_normal(suite) -> [];
permanent_normal(Config) when is_list(Config) ->
?line {ok, _SupPid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child1 = {child1, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
CPid1 ! stop,
test_server:sleep(100),
?line [{child1, Pid ,worker,[]}] = supervisor:which_children(sup_test),
case is_pid(Pid) of
true ->
ok;
false ->
?line test_server:fail({permanent_child_not_restarted, Child1})
end,
?line [1,1,0,1] = get_child_counts(sup_test),
ok.
%-------------------------------------------------------------------------
transient_normal(doc) ->
["A transient child should not be restarted if it exits with "
"reason normal"];
transient_normal(suite) -> [];
transient_normal(Config) when is_list(Config) ->
?line {ok, _SupPid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child1 = {child1, {supervisor_1, start_child, []}, transient, 1000,
worker, []},
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
CPid1 ! stop,
test_server:sleep(100),
?line [{child1,undefined,worker,[]}] = supervisor:which_children(sup_test),
?line [1,0,0,1] = get_child_counts(sup_test),
ok.
%-------------------------------------------------------------------------
temporary_normal(doc) ->
["A temporary process should never be restarted"];
temporary_normal(suite) -> [];
temporary_normal(Config) when is_list(Config) ->
?line {ok, _SupPid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child1 = {child1, {supervisor_1, start_child, []}, temporary, 1000,
worker, []},
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
CPid1 ! stop,
test_server:sleep(100),
?line [{child1,undefined,worker,[]}] = supervisor:which_children(sup_test),
?line [1,0,0,1] = get_child_counts(sup_test),
ok.
%-------------------------------------------------------------------------
permanent_abnormal(doc) ->
["A permanent child should always be restarted"];
permanent_abnormal(suite) -> [];
permanent_abnormal(Config) when is_list(Config) ->
?line {ok, _SupPid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child1 = {child1, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
CPid1 ! die,
test_server:sleep(100),
?line [{child1, Pid ,worker,[]}] = supervisor:which_children(sup_test),
case is_pid(Pid) of
true ->
ok;
false ->
?line test_server:fail({permanent_child_not_restarted, Child1})
end,
?line [1,1,0,1] = get_child_counts(sup_test),
ok.
%-------------------------------------------------------------------------
transient_abnormal(doc) ->
["A transient child should be restarted if it exits with "
"reason abnormal"];
transient_abnormal(suite) -> [];
transient_abnormal(Config) when is_list(Config) ->
?line {ok, _SupPid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child1 = {child1, {supervisor_1, start_child, []}, transient, 1000,
worker, []},
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
CPid1 ! die,
test_server:sleep(100),
?line [{child1, Pid ,worker,[]}] = supervisor:which_children(sup_test),
case is_pid(Pid) of
true ->
ok;
false ->
?line test_server:fail({transient_child_not_restarted, Child1})
end,
?line [1,1,0,1] = get_child_counts(sup_test),
ok.
%-------------------------------------------------------------------------
temporary_abnormal(doc) ->
["A temporary process should never be restarted"];
temporary_abnormal(suite) -> [];
temporary_abnormal(Config) when is_list(Config) ->
?line {ok, _SupPid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child1 = {child1, {supervisor_1, start_child, []}, temporary, 1000,
worker, []},
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
CPid1 ! die,
test_server:sleep(100),
?line [{child1,undefined,worker,[]}] = supervisor:which_children(sup_test),
?line [1,0,0,1] = get_child_counts(sup_test),
ok.
%-------------------------------------------------------------------------
one_for_one(doc) ->
["Test the one_for_one base case."];
one_for_one(suite) -> [];
one_for_one(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child1 = {child1, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
Child2 = {child2, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
?line {ok, Pid} = start({ok, {{one_for_one, 2, 3600}, []}}),
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
link(CPid1),
?line {ok, CPid2} = supervisor:start_child(sup_test, Child2),
link(CPid2),
CPid1 ! die,
receive
{'EXIT', CPid1, died} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
end,
test_server:sleep(100),
Children = supervisor:which_children(sup_test),
if length(Children) == 2 ->
case lists:keysearch(CPid2, 2, Children) of
{value, _} -> ok;
_ -> ?line test_server:fail(bad_child)
end;
true -> ?line test_server:fail({bad_child_list, Children})
end,
?line [2,2,0,2] = get_child_counts(sup_test),
%% Test restart frequency property
CPid2 ! die,
receive
{'EXIT', CPid2, _} -> ok
end,
test_server:sleep(100),
[{_, Pid4, _, _}|_] = supervisor:which_children(sup_test),
Pid4 ! die,
receive
{'EXIT', Pid, _} -> ok
after 3000 -> ?line test_server:fail(restart_failed)
end,
ok.
%-------------------------------------------------------------------------
one_for_one_escalation(doc) ->
["Test restart escalation on a one_for_one supervisor."];
one_for_one_escalation(suite) -> [];
one_for_one_escalation(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child1 = {child1, {supervisor_1, start_child, [error]},
permanent, 1000,
worker, []},
Child2 = {child2, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
?line {ok, Pid} = start({ok, {{one_for_one, 4, 3600}, []}}),
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
link(CPid1),
?line {ok, CPid2} = supervisor:start_child(sup_test, Child2),
link(CPid2),
CPid1 ! die,
receive
{'EXIT', CPid1, died} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
end,
receive
{'EXIT', Pid, _} -> ok
after
2000 -> ?line test_server:fail(supervisor_alive)
end,
receive
{'EXIT', CPid2, _} -> ok
after
4000 -> ?line test_server:fail(all_not_terminated)
end,
ok.
%-------------------------------------------------------------------------
one_for_all(doc) ->
["Test the one_for_all base case."];
one_for_all(suite) -> [];
one_for_all(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child1 = {child1, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
Child2 = {child2, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
?line {ok, Pid} = start({ok, {{one_for_all, 2, 3600}, []}}),
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
link(CPid1),
?line {ok, CPid2} = supervisor:start_child(sup_test, Child2),
link(CPid2),
CPid1 ! die,
receive
{'EXIT', CPid1, died} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
end,
receive
{'EXIT', CPid2, _} -> ok
end,
test_server:sleep(100),
Children = supervisor:which_children(sup_test),
if length(Children) == 2 -> ok;
true -> ?line test_server:fail({bad_child_list, Children})
end,
%% Test that no old children is still alive
SCh = lists:map(fun({_,P,_,_}) -> P end, Children),
case lists:member(CPid1, SCh) of
true -> ?line test_server:fail(bad_child);
false -> ok
end,
case lists:member(CPid2, SCh) of
true -> ?line test_server:fail(bad_child);
false -> ok
end,
?line [2,2,0,2] = get_child_counts(sup_test),
%%% Test restart frequency property
[{_, Pid3, _, _}|_] = supervisor:which_children(sup_test),
Pid3 ! die,
test_server:sleep(100),
[{_, Pid4, _, _}|_] = supervisor:which_children(sup_test),
Pid4 ! die,
receive
{'EXIT', Pid, _} -> ok
after 3000 -> ?line test_server:fail(restart_failed)
end,
exit(Pid, shutdown).
%-------------------------------------------------------------------------
one_for_all_escalation(doc) ->
["Test restart escalation on a one_for_all supervisor."];
one_for_all_escalation(suite) -> [];
one_for_all_escalation(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child1 = {child1, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
Child2 = {child2, {supervisor_1, start_child, [error]},
permanent, 1000,
worker, []},
?line {ok, Pid} = start({ok, {{one_for_all, 4, 3600}, []}}),
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
link(CPid1),
?line {ok, CPid2} = supervisor:start_child(sup_test, Child2),
link(CPid2),
CPid1 ! die,
receive
{'EXIT', CPid1, died} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
end,
receive
{'EXIT', CPid2, _} -> ok
after
2000 -> ?line test_server:fail(all_not_terminated)
end,
receive
{'EXIT', Pid, _} -> ok
after
4000 -> ?line test_server:fail(supervisor_alive)
end,
ok.
%-------------------------------------------------------------------------
simple_one_for_one(doc) ->
["Test the simple_one_for_one base case."];
simple_one_for_one(suite) -> [];
simple_one_for_one(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child = {child, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
?line {ok, Pid} = start({ok, {{simple_one_for_one, 2, 3600}, [Child]}}),
?line {ok, CPid1} = supervisor:start_child(sup_test, []),
link(CPid1),
?line {ok, CPid2} = supervisor:start_child(sup_test, []),
link(CPid2),
CPid1 ! die,
receive
{'EXIT', CPid1, died} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
end,
test_server:sleep(100),
Children = supervisor:which_children(sup_test),
if length(Children) == 2 ->
case lists:keysearch(CPid2, 2, Children) of
{value, _} -> ok;
_ -> ?line test_server:fail(bad_child)
end;
true -> ?line test_server:fail({bad_child_list, Children})
end,
?line [1,2,0,2] = get_child_counts(sup_test),
%% Test restart frequency property
CPid2 ! die,
receive
{'EXIT', CPid2, _} -> ok
end,
test_server:sleep(100),
[{_, Pid4, _, _}|_] = supervisor:which_children(sup_test),
Pid4 ! die,
receive
{'EXIT', Pid, _} -> ok
after 3000 -> ?line test_server:fail(restart_failed)
end,
ok.
%-------------------------------------------------------------------------
simple_one_for_one_extra(doc) ->
["Tests automatic restart of children "
"who's start function return extra info."];
simple_one_for_one_extra(suite) -> [];
simple_one_for_one_extra(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child = {child, {supervisor_1, start_child, [extra_info]},
permanent, 1000, worker, []},
?line {ok, Pid} = start({ok, {{simple_one_for_one, 2, 3600}, [Child]}}),
?line {ok, CPid1, extra_info} = supervisor:start_child(sup_test, []),
link(CPid1),
?line {ok, CPid2, extra_info} = supervisor:start_child(sup_test, []),
link(CPid2),
CPid1 ! die,
receive
{'EXIT', CPid1, died} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
end,
test_server:sleep(100),
Children = supervisor:which_children(sup_test),
if length(Children) == 2 ->
case lists:keysearch(CPid2, 2, Children) of
{value, _} -> ok;
_ -> ?line test_server:fail(bad_child)
end;
true -> ?line test_server:fail({bad_child_list, Children})
end,
?line [1,2,0,2] = get_child_counts(sup_test),
CPid2 ! die,
receive
{'EXIT', CPid2, _} -> ok
end,
test_server:sleep(100),
[{_, Pid4, _, _}|_] = supervisor:which_children(sup_test),
Pid4 ! die,
receive
{'EXIT', Pid, _} -> ok
after 3000 -> ?line test_server:fail(restart_failed)
end,
ok.
%-------------------------------------------------------------------------
simple_one_for_one_escalation(doc) ->
["Test restart escalation on a simple_one_for_one supervisor."];
simple_one_for_one_escalation(suite) -> [];
simple_one_for_one_escalation(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child = {child, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
?line {ok, Pid} = start({ok, {{simple_one_for_one, 4, 3600}, [Child]}}),
?line {ok, CPid1} = supervisor:start_child(sup_test, [error]),
link(CPid1),
?line {ok, CPid2} = supervisor:start_child(sup_test, []),
link(CPid2),
CPid1 ! die,
receive
{'EXIT', CPid1, died} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
end,
receive
{'EXIT', Pid, _} -> ok
after
2000 -> ?line test_server:fail(supervisor_alive)
end,
receive
{'EXIT', CPid2, _} -> ok
after
2000 -> ?line test_server:fail(all_not_terminated)
end,
ok.
%-------------------------------------------------------------------------
rest_for_one(doc) ->
["Test the rest_for_one base case."];
rest_for_one(suite) -> [];
rest_for_one(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child1 = {child1, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
Child2 = {child2, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
Child3 = {child3, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
?line {ok, Pid} = start({ok, {{rest_for_one, 2, 3600}, []}}),
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
link(CPid1),
?line {ok, CPid2} = supervisor:start_child(sup_test, Child2),
link(CPid2),
?line {ok, CPid3} = supervisor:start_child(sup_test, Child3),
link(CPid3),
?line [3,3,0,3] = get_child_counts(sup_test),
CPid2 ! die,
receive
{'EXIT', CPid2, died} -> ok;
{'EXIT', CPid2, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
after 2000 ->
?line test_server:fail(no_exit)
end,
%% Check that Cpid3 did die
receive
{'EXIT', CPid3, _} -> ok
after 2000 ->
?line test_server:fail(no_exit)
end,
%% Check that Cpid1 didn't die
receive
{'EXIT', CPid1, _} ->
?line test_server:fail(bad_exit)
after
100 -> ok
end,
Children = supervisor:which_children(sup_test),
if length(Children) == 3 -> ok;
true -> ?line test_server:fail({bad_child_list, Children})
end,
?line [3,3,0,3] = get_child_counts(sup_test),
%% Test that no old children is still alive
SCh = lists:map(fun({_,P,_,_}) -> P end, Children),
case lists:member(CPid1, SCh) of
true -> ok;
false -> ?line test_server:fail(bad_child)
end,
case lists:member(CPid2, SCh) of
true -> ?line test_server:fail(bad_child);
false -> ok
end,
case lists:member(CPid3, SCh) of
true -> ?line test_server:fail(bad_child);
false -> ok
end,
%% Test restart frequency property
[{child3, Pid3, _, _}|_] = supervisor:which_children(sup_test),
Pid3 ! die,
test_server:sleep(100),
[_,{child2, Pid4, _, _}|_] = supervisor:which_children(sup_test),
Pid4 ! die,
receive
{'EXIT', Pid, _} -> ok
after 3000 -> ?line test_server:fail(restart_failed)
end,
exit(Pid, shutdown).
%-------------------------------------------------------------------------
rest_for_one_escalation(doc) ->
["Test restart escalation on a rest_for_one supervisor."];
rest_for_one_escalation(suite) -> [];
rest_for_one_escalation(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child1 = {child1, {supervisor_1, start_child, []}, permanent, 1000,
worker, []},
Child2 = {child2, {supervisor_1, start_child, [error]},
permanent, 1000,
worker, []},
?line {ok, Pid} = start({ok, {{rest_for_one, 4, 3600}, []}}),
?line {ok, CPid1} = supervisor:start_child(sup_test, Child1),
link(CPid1),
?line {ok, CPid2} = supervisor:start_child(sup_test, Child2),
link(CPid2),
CPid1 ! die,
receive
{'EXIT', CPid1, died} -> ok;
{'EXIT', CPid1, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
end,
receive
{'EXIT', CPid2, _} -> ok
after
2000 -> ?line test_server:fail(not_terminated)
end,
receive
{'EXIT', Pid, _} -> ok
after
4000 -> ?line test_server:fail(supervisor_alive)
end,
ok.
%-------------------------------------------------------------------------
child_unlink(doc)-> ["Test that the supervisor does not hang forever if "
"the child unliks and then is terminated by the supervisor."];
child_unlink(suite) -> [];
child_unlink(Config) when is_list(Config) ->
?line {ok, SupPid} = start({ok, {{one_for_one, 2, 3600}, []}}),
Child = {naughty_child, {naughty_child,
start_link, [SupPid]}, permanent,
1000, worker, [supervisor_SUITE]},
?line {ok, _ChildPid} = supervisor:start_child(sup_test, Child),
Pid = spawn(supervisor, terminate_child, [SupPid, naughty_child]),
SupPid ! foo,
timer:sleep(5000),
%% If the supervisor did not hang it will have got rid of the
%% foo message that we sent.
case erlang:process_info(SupPid, message_queue_len) of
{message_queue_len, 0}->
ok;
_ ->
exit(Pid, kill),
?line test_server:fail(supervisor_hangs)
end.
%-------------------------------------------------------------------------
tree(doc) ->
["Test a basic supervison tree."];
tree(suite) ->
[];
tree(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child1 = {child1, {supervisor_1, start_child, []},
permanent, 1000,
worker, []},
Child2 = {child2, {supervisor_1, start_child, []},
permanent, 1000,
worker, []},
Child3 = {child3, {supervisor_1, start_child, [error]},
permanent, 1000,
worker, []},
Child4 = {child4, {supervisor_1, start_child, []},
permanent, 1000,
worker, []},
ChildSup1 = {supchild1,
{supervisor, start_link,
[?MODULE, {ok, {{one_for_one, 4, 3600}, [Child1, Child2]}}]},
permanent, infinity,
supervisor, []},
ChildSup2 = {supchild2,
{supervisor, start_link,
[?MODULE, {ok, {{one_for_one, 4, 3600}, []}}]},
permanent, infinity,
supervisor, []},
%% Top supervisor
?line {ok, Pid} = start({ok, {{one_for_all, 4, 3600}, []}}),
%% Child supervisors
?line {ok, Sup1} = supervisor:start_child(Pid, ChildSup1),
?line {ok, Sup2} = supervisor:start_child(Pid, ChildSup2),
?line [2,2,2,0] = get_child_counts(Pid),
%% Workers
?line [{_, CPid2, _, _},{_, CPid1, _, _}] =
supervisor:which_children(Sup1),
?line [2,2,0,2] = get_child_counts(Sup1),
?line [0,0,0,0] = get_child_counts(Sup2),
%% Dynamic children
?line {ok, CPid3} = supervisor:start_child(Sup2, Child3),
?line {ok, CPid4} = supervisor:start_child(Sup2, Child4),
?line [2,2,0,2] = get_child_counts(Sup1),
?line [2,2,0,2] = get_child_counts(Sup2),
link(Sup1),
link(Sup2),
link(CPid1),
link(CPid2),
link(CPid3),
link(CPid4),
%% Test that the only the process that dies is restarted
CPid4 ! die,
receive
{'EXIT', CPid4, _} -> ?line ok
after 10000 ->
?line test_server:fail(child_was_not_killed)
end,
test_server:sleep(100),
?line [{_, CPid2, _, _},{_, CPid1, _, _}] =
supervisor:which_children(Sup1),
?line [2,2,0,2] = get_child_counts(Sup1),
?line [{_, NewCPid4, _, _},{_, CPid3, _, _}] =
supervisor:which_children(Sup2),
?line [2,2,0,2] = get_child_counts(Sup2),
link(NewCPid4),
%% Test that supervisor tree is restarted, but not dynamic children.
CPid3 ! die,
receive
{'EXIT', CPid3, died} -> ?line ok;
{'EXIT', CPid3, Reason} ->
?line test_server:fail({bad_exit_reason, Reason})
after 1000 ->
?line test_server:fail(child_was_not_killed)
end,
test_server:sleep(1000),
receive
{'EXIT', NewCPid4, _} -> ?line ok
after 1000 ->
?line test_server:fail(child_was_not_killed)
end,
receive
{'EXIT', Sup2, _} -> ?line ok
after 1000 ->
?line test_server:fail(child_was_not_killed)
end,
receive
{'EXIT', CPid1, _} -> ?line ok
after 1000 ->
?line test_server:fail(child_was_not_killed)
end,
receive
{'EXIT', CPid2, _} -> ?line ok
after 1000 ->
?line test_server:fail(child_was_not_killed)
end,
receive
{'EXIT', Sup1, _} -> ?line ok
after 1000 ->
?line test_server:fail(child_was_not_killed)
end,
?line [{supchild2, NewSup2, _, _},{supchild1, NewSup1, _, _}] =
supervisor:which_children(Pid),
?line [2,2,2,0] = get_child_counts(Pid),
?line [{child2, _, _, _},{child1, _, _, _}] =
supervisor:which_children(NewSup1),
?line [2,2,0,2] = get_child_counts(NewSup1),
?line [] = supervisor:which_children(NewSup2),
?line [0,0,0,0] = get_child_counts(NewSup2),
ok.
%-------------------------------------------------------------------------
count_children_memory(doc) ->
["Test that count_children does not eat memory."];
count_children_memory(suite) ->
[];
count_children_memory(Config) when is_list(Config) ->
process_flag(trap_exit, true),
Child = {child, {supervisor_1, start_child, []}, temporary, 1000,
worker, []},
?line {ok, _Pid} = start({ok, {{simple_one_for_one, 2, 3600}, [Child]}}),
[supervisor:start_child(sup_test, []) || _Ignore <- lists:seq(1,1000)],
garbage_collect(),
_Size1 = erlang:memory(processes_used),
Children = supervisor:which_children(sup_test),
_Size2 = erlang:memory(processes_used),
ChildCount = get_child_counts(sup_test),
_Size3 = erlang:memory(processes_used),
[supervisor:start_child(sup_test, []) || _Ignore2 <- lists:seq(1,1000)],
garbage_collect(),
Children2 = supervisor:which_children(sup_test),
Size4 = erlang:memory(processes_used),
ChildCount2 = get_child_counts(sup_test),
Size5 = erlang:memory(processes_used),
garbage_collect(),
Children3 = supervisor:which_children(sup_test),
Size6 = erlang:memory(processes_used),
ChildCount3 = get_child_counts(sup_test),
Size7 = erlang:memory(processes_used),
?line 1000 = length(Children),
?line [1,1000,0,1000] = ChildCount,
?line 2000 = length(Children2),
?line [1,2000,0,2000] = ChildCount2,
?line Children3 = Children2,
?line ChildCount3 = ChildCount2,
%% count_children consumes memory using an accumulator function,
%% but the space can be reclaimed incrementally,
%% which_children may generate garbage that will be reclaimed later.
case (Size5 =< Size4) of
true -> ok;
false ->
?line test_server:fail({count_children, used_more_memory})
end,
case Size7 =< Size6 of
true -> ok;
false ->
?line test_server:fail({count_children, used_more_memory})
end,
[exit(Pid, kill) || {undefined, Pid, worker, _Modules} <- Children3],
test_server:sleep(100),
?line [1,0,0,0] = get_child_counts(sup_test),
ok.
count_children_allocator_test(MemoryState) ->
Allocators = [temp_alloc, eheap_alloc, binary_alloc, ets_alloc,
driver_alloc, sl_alloc, ll_alloc, fix_alloc, std_alloc,
sys_alloc],
MemoryStateList = element(4, MemoryState),
AllocTypes = [lists:keyfind(Alloc, 1, MemoryStateList)
|| Alloc <- Allocators],
AllocStates = [lists:keyfind(e, 1, AllocValue)
|| {_Type, AllocValue} <- AllocTypes],
lists:all(fun(State) -> State == {e, true} end, AllocStates).
%-------------------------------------------------------------------------
do_not_save_start_parameters_for_temporary_children(doc) ->
["Temporary children shall not be restarted so they should not "
"save start parameters, as it potentially can "
"take up a huge amount of memory for no purpose."];
do_not_save_start_parameters_for_temporary_children(suite) ->
[];
do_not_save_start_parameters_for_temporary_children(Config) when is_list(Config) ->
process_flag(trap_exit, true),
dont_save_start_parameters_for_temporary_children(one_for_all),
dont_save_start_parameters_for_temporary_children(one_for_one),
dont_save_start_parameters_for_temporary_children(rest_for_one),
dont_save_start_parameters_for_temporary_children(simple_one_for_one).
dont_save_start_parameters_for_temporary_children(simple_one_for_one = Type) ->
Permanent = {child, {supervisor_1, start_child, []},
permanent, 1000, worker, []},
Transient = {child, {supervisor_1, start_child, []},
transient, 1000, worker, []},
Temporary = {child, {supervisor_1, start_child, []},
temporary, 1000, worker, []},
{ok, Sup1} = supervisor:start_link(?MODULE, {ok, {{Type, 2, 3600}, [Permanent]}}),
{ok, Sup2} = supervisor:start_link(?MODULE, {ok, {{Type, 2, 3600}, [Transient]}}),
{ok, Sup3} = supervisor:start_link(?MODULE, {ok, {{Type, 2, 3600}, [Temporary]}}),
LargeList = lists:duplicate(10, "Potentially large"),
start_children(Sup1, [LargeList], 100),
start_children(Sup2, [LargeList], 100),
start_children(Sup3, [LargeList], 100),
[{memory,Mem1}] = process_info(Sup1, [memory]),
[{memory,Mem2}] = process_info(Sup2, [memory]),
[{memory,Mem3}] = process_info(Sup3, [memory]),
true = (Mem3 < Mem1) and (Mem3 < Mem2),
exit(Sup1, shutdown),
exit(Sup2, shutdown),
exit(Sup3, shutdown);
dont_save_start_parameters_for_temporary_children(Type) ->
{ok, Sup1} = supervisor:start_link(?MODULE, {ok, {{Type, 2, 3600}, []}}),
{ok, Sup2} = supervisor:start_link(?MODULE, {ok, {{Type, 2, 3600}, []}}),
{ok, Sup3} = supervisor:start_link(?MODULE, {ok, {{Type, 2, 3600}, []}}),
LargeList = lists:duplicate(10, "Potentially large"),
Permanent = {child1, {supervisor_1, start_child, [LargeList]},
permanent, 1000, worker, []},
Transient = {child2, {supervisor_1, start_child, [LargeList]},
transient, 1000, worker, []},
Temporary = {child3, {supervisor_1, start_child, [LargeList]},
temporary, 1000, worker, []},
start_children(Sup1, Permanent, 100),
start_children(Sup2, Transient, 100),
start_children(Sup3, Temporary, 100),
[{memory,Mem1}] = process_info(Sup1, [memory]),
[{memory,Mem2}] = process_info(Sup2, [memory]),
[{memory,Mem3}] = process_info(Sup3, [memory]),
true = (Mem3 < Mem1) and (Mem3 < Mem2),
exit(Sup1, shutdown),
exit(Sup2, shutdown),
exit(Sup3, shutdown).
start_children(_,_, 0) ->
ok;
start_children(Sup, Args, N) ->
Spec = child_spec(Args, N),
{ok, _, _} = supervisor:start_child(Sup, Spec),
start_children(Sup, Args, N-1).
child_spec([_|_] = SimpleOneForOneArgs, _) ->
SimpleOneForOneArgs;
child_spec({Name, MFA, RestartType, Shutdown, Type, Modules}, N) ->
NewName = list_to_atom((atom_to_list(Name) ++ integer_to_list(N))),
{NewName, MFA, RestartType, Shutdown, Type, Modules}.
