| % 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(couch_log_config_listener_test). |
| |
| |
| -include_lib("couch_log/include/couch_log.hrl"). |
| -include_lib("eunit/include/eunit.hrl"). |
| |
| -define(TIMEOUT, 1000). |
| |
| couch_log_config_test_() -> |
| {setup, |
| fun couch_log_test_util:start/0, |
| fun couch_log_test_util:stop/1, |
| [ |
| fun check_restart_listener/0, |
| fun check_ignore_non_log/0 |
| ] |
| }. |
| |
| |
| check_restart_listener() -> |
| Listener1 = get_listener(), |
| ?assert(is_process_alive(Listener1)), |
| |
| Handler1 = get_handler(), |
| ?assertNotEqual(not_found, Handler1), |
| Ref = erlang:monitor(process, Listener1), |
| ok = gen_event:delete_handler(config_event, get_handler(), testing), |
| |
| receive |
| {'DOWN', Ref, process, _, _} -> |
| ?assertNot(is_process_alive(Listener1)) |
| after ?TIMEOUT -> |
| erlang:error({timeout, config_listener_mon_death}) |
| end, |
| |
| NewHandler = test_util:wait(fun() -> |
| case get_handler() of |
| not_found -> wait; |
| Reply -> Reply |
| end |
| end, ?TIMEOUT, 20), |
| ?assertEqual(Handler1, NewHandler), |
| |
| Listener2 = get_listener(), |
| ?assert(is_process_alive(Listener2)), |
| ?assertNotEqual(Listener1, Listener2), |
| ok. |
| |
| check_ignore_non_log() -> |
| Run = fun() -> |
| couch_log_test_util:with_config_listener(fun() -> |
| config:set("foo", "bar", "baz"), |
| couch_log_test_util:wait_for_config() |
| end) |
| end, |
| ?assertError(config_change_timeout, Run()). |
| |
| |
| get_handler() -> |
| FoldFun = fun |
| ({config_listener, {couch_log_sup, _}} = H, not_found) -> |
| H; |
| (_, Acc) -> |
| Acc |
| end, |
| lists:foldl(FoldFun, not_found, gen_event:which_handlers(config_event)). |
| |
| get_listener() -> |
| Children = supervisor:which_children(couch_log_sup), |
| hd([Pid || {config_listener_mon, Pid, _, _} <- Children]). |