[erlang-questions] Rebar, common_test and cover issue

Lukas Larsson <>
Wed Mar 14 08:31:14 CET 2012


Hi, meck should retain the cover info if used properly. Also make sure you
have the latest version. I think some work has been done with cover
recently.

Lukas
On Mar 14, 2012 7:25 AM, "Maxim Treskin" <> wrote:

> Thank you for reply, it is really root of the problem.
> I forgot mention about library meck which loads module and redefines some
> of its functions. When I remove meck, coverage works as expected. I should
> think how to replace meck.
>
> On 13 March 2012 19:58, Siri Hansen <> wrote:
>
>> This is not related to the name of the SUITEs. What happens is that the
>> modules (my_module1 and my_module2 - and possible other modules as derived
>> from your cover spec file) are cover compiled and loaded by common_test
>> before the test starts. The result of the cover compilation exists only in
>> memory so if the test code explicitly loads these modules again the
>> original beam files will be used and the cover compiled version disappears.
>> The only way to overcome this is to avoid loading of code in your tests.
>> /siri
>>
>> Den 10:55 13. mars 2012 skrev Maxim Treskin <>følgende:
>>
>>  Yes, this modules loaded in tests. How I can fix this? Rename SUIT
>>> modules?
>>>
>>>
>>> On 13 March 2012 16:38, Siri Hansen <> wrote:
>>>
>>>> This would typically happen if your test loads my_module1 and
>>>> my_module2. Could that be the case?
>>>> /siri
>>>>
>>>> Den 10:30 13. mars 2012 skrev Maxim Treskin <>følgende:
>>>>
>>>>> Hello
>>>>>
>>>>> I have strange behaviour of rebar+common_test+cover.
>>>>> There is two files in ./test/:
>>>>>
>>>>> my_module1_SUITE.erl
>>>>> my_module2_SUITE.erl
>>>>>
>>>>> where ct suites defined. When I run `rebar ct verbose=1` I see:
>>>>>
>>>>> ```
>>>>> ...
>>>>> Cover compiling 'myapp' (16 files) - this may take some time... done
>>>>> ...
>>>>> Cover analysing...
>>>>> WARNING: Analysis failed for my_module1. Reason:
>>>>> {error,{not_cover_compiled,my_module1}}
>>>>> WARNING: Analysis failed for my_module2. Reason:
>>>>> {error,{not_cover_compiled,my_module2}}
>>>>> ```
>>>>>
>>>>> Why I see no any error before at cover compilation step?
>>>>>
>>>>> Moreover, if I just replace my_module1_SUITE:all/0 to return just
>>>>> empty list [], warning "Analysis failed for my_module1" disappears, and
>>>>> cover for this file appears in cover.html log.
>>>>>
>>>>> Can you explain me this strange issues? Is this any bug or expected
>>>>> behaviour?
>>>>>
>>>>> Thank you.
>>>>>
>>>>> --
>>>>> Maxim Treskin
>>>>> http://metachord.com
>>>>>
>>>>> _______________________________________________
>>>>> erlang-questions mailing list
>>>>> 
>>>>> http://erlang.org/mailman/listinfo/erlang-questions
>>>>>
>>>>>
>>>>
>>>
>>>
>>> --
>>> Maxim Treskin
>>>
>>
>>
>
>
> --
> Maxim Treskin
>
> _______________________________________________
> erlang-questions mailing list
> 
> http://erlang.org/mailman/listinfo/erlang-questions
>
>
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