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% Licensed under the Apache License, Version 2.0 (the "License"); you may not
% use this file except in compliance with the License. You may obtain a copy of
% the License at
%
% http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
% License for the specific language governing permissions and limitations under
% the License.
-module(ddoc_cache_entry_test).
-export([
recover/1
]).
-include_lib("couch/include/couch_db.hrl").
-include_lib("eunit/include/eunit.hrl").
-include("ddoc_cache_test.hrl").
recover(<<"foo">>) ->
timer:sleep(30000);
recover(DbName) ->
{ok, {DbName, such_custom}}.
start_couch() ->
Ctx = ddoc_cache_tutil:start_couch(),
meck:new(ddoc_cache_ev, [passthrough]),
Ctx.
stop_couch(Ctx) ->
meck:unload(),
ddoc_cache_tutil:stop_couch(Ctx).
check_entry_test_() ->
{
setup,
fun start_couch/0,
fun stop_couch/1,
ddoc_cache_tutil:with([
{"cancel_and_replace_opener", fun cancel_and_replace_opener/1},
{"condenses_access_messages", fun condenses_access_messages/1},
{"kill_opener_on_terminate", fun kill_opener_on_terminate/1},
{"evict_when_not_accessed", fun evict_when_not_accessed/1},
{"open_dead_entry", fun open_dead_entry/1},
{"handles_bad_messages", fun handles_bad_messages/1},
{"handles_code_change", fun handles_code_change/1}
])
}.
cancel_and_replace_opener(_) ->
Key = {ddoc_cache_entry_custom, {<<"foo">>, ?MODULE}},
true = ets:insert_new(?CACHE, #entry{key = Key}),
{ok, Entry} = ddoc_cache_entry:start_link(Key, undefined),
Opener1 = element(4, sys:get_state(Entry)),
Ref1 = erlang:monitor(process, Opener1),
gen_server:cast(Entry, force_refresh),
receive {'DOWN', Ref1, _, _, _} -> ok end,
Opener2 = element(4, sys:get_state(Entry)),
?assert(Opener2 /= Opener1),
?assert(is_process_alive(Opener2)),
% Clean up after ourselves
unlink(Entry),
ddoc_cache_entry:shutdown(Entry).
condenses_access_messages({DbName, _}) ->
meck:reset(ddoc_cache_ev),
Key = {ddoc_cache_entry_custom, {DbName, ?MODULE}},
true = ets:insert(?CACHE, #entry{key = Key}),
{ok, Entry} = ddoc_cache_entry:start_link(Key, undefined),
erlang:suspend_process(Entry),
lists:foreach(fun(_) ->
gen_server:cast(Entry, accessed)
end, lists:seq(1, 100)),
erlang:resume_process(Entry),
meck:wait(1, ddoc_cache_ev, event, [accessed, Key], 1000),
?assertError(
timeout,
meck:wait(2, ddoc_cache_ev, event, [accessed, Key], 100)
),
unlink(Entry),
ddoc_cache_entry:shutdown(Entry).
kill_opener_on_terminate(_) ->
Pid = spawn(fun() -> receive _ -> ok end end),
?assert(is_process_alive(Pid)),
St = {st, key, val, Pid, waiters, ts, accessed},
?assertEqual(ok, ddoc_cache_entry:terminate(normal, St)),
?assert(not is_process_alive(Pid)).
evict_when_not_accessed(_) ->
meck:reset(ddoc_cache_ev),
Key = {ddoc_cache_entry_custom, {<<"bar">>, ?MODULE}},
true = ets:insert_new(?CACHE, #entry{key = Key}),
{ok, Entry} = ddoc_cache_entry:start_link(Key, undefined),
Ref = erlang:monitor(process, Entry),
AccessCount1 = element(7, sys:get_state(Entry)),
?assertEqual(1, AccessCount1),
ok = gen_server:cast(Entry, refresh),
meck:wait(ddoc_cache_ev, event, [update_noop, Key], 1000),
AccessCount2 = element(7, sys:get_state(Entry)),
?assertEqual(0, AccessCount2),
ok = gen_server:cast(Entry, refresh),
receive {'DOWN', Ref, _, _, Reason} -> Reason end,
?assertEqual(normal, Reason),
?assertEqual(0, ets:info(?CACHE, size)).
open_dead_entry({DbName, _}) ->
Pid = spawn(fun() -> ok end),
Key = {ddoc_cache_entry_custom, {DbName, ?MODULE}},
?assertEqual(recover(DbName), ddoc_cache_entry:open(Pid, Key)).
handles_bad_messages(_) ->
CallExpect = {stop, {bad_call, foo}, {bad_call, foo}, baz},
CastExpect = {stop, {bad_cast, foo}, bar},
InfoExpect = {stop, {bad_info, foo}, bar},
?assertEqual(CallExpect, ddoc_cache_entry:handle_call(foo, bar, baz)),
?assertEqual(CastExpect, ddoc_cache_entry:handle_cast(foo, bar)),
?assertEqual(InfoExpect, ddoc_cache_entry:handle_info(foo, bar)).
handles_code_change(_) ->
CCExpect = {ok, bar},
?assertEqual(CCExpect, ddoc_cache_entry:code_change(foo, bar, baz)).
handles_bad_shutdown_test_() ->
{timeout, 10, ?_test(begin
ErrorPid = spawn(fun() ->
receive
_ -> exit(bad_shutdown)
end
end),
?assertExit(bad_shutdown, ddoc_cache_entry:shutdown(ErrorPid)),
NotDeadYetPid = spawn(fun() ->
timer:sleep(infinity)
end),
?assertExit(
{timeout, {entry_shutdown, NotDeadYetPid}},
ddoc_cache_entry:shutdown(NotDeadYetPid)
)
end)}.
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