eunit logger

logger_test.erl

-module(logger_test).

-include_lib("eunit/include/eunit.hrl").

-export([function_that_logs/0, function_that_logs_and_fails/0]).
-export([log/2]).

function_that_logs() ->
    logger:error("Log me please").

function_that_logs_and_fails() ->
    logger:error("Log me please"),
    ?assert(ok == nok).

logs_test_() ->
    {setup,
     fun() ->
             logger:add_handler(?MODULE,?MODULE,
                                #{ level => all }),
             logger:update_handler_config(default,level,none)
     end,
     fun(_) ->
             logger:update_handler_config(default,level,notice),
             logger:remove_handler(?MODULE) end,
     [fun function_that_logs/0,
      fun function_that_logs_and_fails/0]
    }.

log(#{ meta := #{ gl := Gl} } = Log, _Config) ->
    io:format(Gl, "~ts",[logger_formatter:format(Log, #{})]),
    ok.