[erlang-questions] Rebar, common_test and cover issue

Maxim Treskin <>
Wed Mar 14 07:25:04 CET 2012


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
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