[erlang-questions] CT: outputting lager debug messages

Bjarne Wichmann Bagge Petersen bp@REDACTED
Tue Apr 18 16:41:00 CEST 2017


I was too quick to celebrate.

There is a side effect to

lager_common_test_backend:bounce(debug)

in that i mutes non-lager error messages from the CT logs (html), though I
do see them in the console now.

Best regards


Bjarne Wichmann Bagge Petersen

Backend Developer, ShopGun


E: bp@REDACTED
L: dk.linkedin.com/in/bjarnewp
W: shopgun.com
A: Arne Jacobsens Allé 16, Field's, 3rd floor, DK-2300 København S, Denmark

2017-04-18 15:07 GMT+02:00 Bjarne Wichmann Bagge Petersen <bp@REDACTED>:

> Great, thanks.
>
> init_per_suite(Cfg) ->
>     lager_common_test_backend:bounce(debug),
>     Cfg.
>
> did the trick, now I am getting debug messages in tests. :-)
>
>
> Best regards
>
>
> Bjarne Wichmann Bagge Petersen
>
> Backend Developer, ShopGun
>
>
> E: bp@REDACTED
> L: dk.linkedin.com/in/bjarnewp
> W: shopgun.com
> A: Arne Jacobsens Allé 16, Field's, 3rd floor, DK-2300 København S, Denmark
>
> 2017-04-12 17:42 GMT+02:00 Jacob <jacob01@REDACTED>:
>
>> I am using this code in my test suite modules to catch lager debug output:
>>
>> init_per_suite(Cfg) ->
>>     lager_common_test_backend:bounce(debug),
>>     Cfg.
>>
>> No other changes are required. The lager logging messages are then
>> included in the regular test suite output files.
>>
>> Best regards
>>
>> Jacob
>>
>> On 04/12/2017 05:32 PM, Luis Rascão wrote:
>> > Maybe you're missing `lager:set_loglevel(lager_console_backend,
>> debug).` ?
>> >
>> > On Sat, Apr 8, 2017 at 6:48 AM, Bjarne Wichmann Bagge Petersen
>> > <bp@REDACTED <mailto:bp@REDACTED>> wrote:
>> >
>> >     I have a little issue where I would like to output lager
>> >     debug-messages when running common tests. But I can't get it to
>> work.
>> >
>> >     In `init_pr_suite` I have
>> >
>> >     application:load(lager),
>> >     application:set_env(lager, handlers, [{lager_console_backend,
>> >     debug}, {lager_common_test_backend, debug}]),
>> >
>> >     And in the test-code I have this little snippet:
>> >
>> >         ct:log("ENV ~p", [application:get_all_env(lager)]),
>> >         lager:warning("Now you see me"),
>> >         lager:debug("Now you don't"),
>> >
>> >     Which outputs:
>> >
>> >     *** User 2017-04-08 07:36:42.089 ***
>> >     ENV [{crash_log_count,5},
>> >          {crash_log_date,"$D0"},
>> >          {colored,false},
>> >          {crash_log_msg_size,65536},
>> >          {colors,[{debug,"\e[0;38m"},
>> >                   {info,"\e[1;37m"},
>> >                   {notice,"\e[1;36m"},
>> >                   {warning,"\e[1;33m"},
>> >                   {error,"\e[1;31m"},
>> >                   {critical,"\e[1;35m"},
>> >                   {alert,"\e[1;44m"},
>> >                   {emergency,"\e[1;41m"}]},
>> >          {included_applications,[]},
>> >          {async_threshold,20},
>> >          {crash_log_size,10485760},
>> >          {error_logger_whitelist,[cth_readable_failonly]},
>> >          {error_logger_redirect,true},
>> >          {async_threshold_window,5},
>> >          {crash_log,"log/crash.log"},
>> >          {error_logger_hwm,50},
>> >          {handlers,[{lager_console_backend,debug},
>> >                     {lager_common_test_backend,debug}]}]
>> >
>> >     *** User 2017-04-08 07:36:42.090 ***
>> >     07:36:42.089 [warning] Now you see me
>> >
>> >
>> >     Missing the debug-line.
>> >
>> >     So what am I missing? Is `lager_common_test_backend` the wrong flag?
>> >     Or is CT muting debug-messages anyway?
>> >
>> >
>> >     Best regards
>> >
>> >
>> >     Bjarne Wichmann Bagge Petersen
>> >
>> >     Backend Developer, ShopGun
>> >
>> >
>> >     E: bp@REDACTED <mailto:bp@REDACTED>
>> >     L: dk.linkedin.com/in/bjarnewp <http://dk.linkedin.com/in/bjarnewp>
>> >     W: shopgun.com <http://shopgun.com>
>> >     A: Arne Jacobsens Allé 16, Field's, 3rd floor, DK-2300 København S,
>> >     Denmark
>> >
>> >     ShopGun, your helping hand in shopping, is available at shopgun.com
>> >     <http://shopgun.com> and as the ShopGun app
>> >     <http://shopgun.com/app/download/>.
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-- 
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