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142 lignes
5.2 KiB
142 lignes
5.2 KiB
%% -------------------------------------------------------------------
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%%
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%% Copyright (c) 2011-2017 Basho Technologies, Inc.
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%%
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%% This file is provided to you under the Apache License,
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%% Version 2.0 (the "License"); you may not use this file
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%% except in compliance with the License. You may obtain
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%% a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing,
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%% software distributed under the License is distributed on an
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%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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%% KIND, either express or implied. See the License for the
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%% specific language governing permissions and limitations
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%% under the License.
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%%
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%% -------------------------------------------------------------------
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-module(lager_test_function_transform).
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-include("lager.hrl").
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-lager_function_transforms([
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{returns_static, {lager_test_function_transform, transform_static}},
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{returns_dynamic, {lager_test_function_transform, transform_dynamic}}
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]).
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-compile({parse_transform, lager_transform}).
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-ifdef(TEST).
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-include_lib("eunit/include/eunit.hrl").
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-export([
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transform_static/0,
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transform_dynamic/0
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]).
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-endif.
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-ifdef(TEST).
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transform_static() ->
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static_result.
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transform_dynamic() ->
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rand:uniform(10).
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not_running_test() ->
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?assertEqual({error, lager_not_running}, lager:log(info, self(), "not running")).
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setup() ->
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error_logger:tty(false),
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application:load(lager),
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application:set_env(lager, handlers, [{lager_test_backend, info}]),
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application:set_env(lager, error_logger_redirect, false),
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application:unset_env(lager, traces),
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lager:start(),
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%% There is a race condition between the application start up, lager logging its own
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%% start up condition and several tests that count messages or parse the output of
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%% tests. When the lager start up message wins the race, it causes these tests
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%% which parse output or count message arrivals to fail.
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%%
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%% We introduce a sleep here to allow `flush' to arrive *after* the start up
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%% message has been received and processed.
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%%
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%% This race condition was first exposed during the work on
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%% 4b5260c4524688b545cc12da6baa2dfa4f2afec9 which introduced the lager
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%% manager killer PR.
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timer:sleep(5),
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gen_event:call(lager_event, lager_test_backend, flush).
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cleanup(_) ->
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catch ets:delete(lager_config), %% kill the ets config table with fire
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application:stop(lager),
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application:stop(goldrush),
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error_logger:tty(true).
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transform_function_test_() ->
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{foreach,
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fun setup/0,
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fun cleanup/1,
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[
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{"observe that there is nothing up my sleeve",
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fun() ->
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?assertEqual(undefined, lager_test_backend:pop()),
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?assertEqual(0, lager_test_backend:count())
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end
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},
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{"logging works",
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fun() ->
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lager:warning("test message"),
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?assertEqual(1, lager_test_backend:count()),
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{Level, _Time, Message, _Metadata} = lager_test_backend:pop(),
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?assertMatch(Level, lager_util:level_to_num(warning)),
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?assertEqual("test message", Message),
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ok
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end
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},
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{"Test calling a function returns the same content",
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fun() ->
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lager:warning("static message"),
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?assertEqual(1, lager_test_backend:count()),
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{_Level, _Time, _Message, Metadata} = lager_test_backend:pop(),
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?assertEqual(transform_static(), proplists:get_value(returns_static, Metadata)),
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ok
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end
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},
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{"Test calling a function which returns content which can change",
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fun() ->
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lager:warning("dynamic message 1"),
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lager:warning("dynamic message 2"),
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lager:warning("dynamic message 3"),
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lager:warning("dynamic message 4"),
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lager:warning("dynamic message 5"),
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lager:warning("dynamic message 6"),
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?assertEqual(6, lager_test_backend:count()),
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{_Level1, _Time1, _Message1, Metadata1} = lager_test_backend:pop(),
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Replacement1 = proplists:get_value(returns_dynamic, Metadata1),
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?assert((1 =< Replacement1) and (Replacement1 =< 10)),
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{_Level2, _Time2, _Message2, Metadata2} = lager_test_backend:pop(),
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Replacement2 = proplists:get_value(returns_dynamic, Metadata2),
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?assert((1 =< Replacement2) and (Replacement2 =< 10)),
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{_Level3, _Time3, _Message3, Metadata3} = lager_test_backend:pop(),
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Replacement3 = proplists:get_value(returns_dynamic, Metadata3),
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?assert((1 =< Replacement3) and (Replacement3 =< 10)),
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{_Level4, _Time4, _Message4, Metadata4} = lager_test_backend:pop(),
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Replacement4 = proplists:get_value(returns_dynamic, Metadata4),
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?assert((1 =< Replacement4) and (Replacement4 =< 10)),
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{_Level5, _Time5, _Message5, Metadata5} = lager_test_backend:pop(),
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Replacement5 = proplists:get_value(returns_dynamic, Metadata5),
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?assert((1 =< Replacement5) and (Replacement5 =< 10)),
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{_Level6, _Time6, _Message6, Metadata6} = lager_test_backend:pop(),
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Replacement6 = proplists:get_value(returns_dynamic, Metadata6),
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?assert((1 =< Replacement6) and (Replacement6 =< 10)),
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ok
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end
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}
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]
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}.
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-endif.
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