Re: [Cobertura-devel] Can I deploy cobertura on a installed-by-rpm java project

[John W. L. <Joh...@sa...>]

We will have to investigate the exact issue.   Until recently, I was under the assumption that the merge worked fine.

-----Original Message-----
From: Zschocke, Florian [mailto:Flo...@cy...] 
Sent: Friday, July 27, 2012 1:15 PM
To: Eyal Edri
Cc: cob...@li...
Subject: Re: [Cobertura-devel] Can I deploy cobertura on a installed-by-rpm java project

-----Original Message-----
From: Eyal Edri [mailto:ee...@re...] 



----- Original Message -----
> From: "Florian Zschocke" <Flo...@cy...>
> Sent: Sunday, July 22, 2012 11:36:01 PM
> 
> Plus, if you run the report only on the created cobertua.ser file, you 
> will get a code coverage of 100%. That is because only information for 
> the touched lines and branches will be in the file.
> To get correct code coverage you need the information from the rest of 
> the sources, too. So you will need to merge the cobertura.ser file 
> created on your deployment server with the cobertura.ser file created 
> during instrumentation of the code.
> 
> Be aware that Cobertura seems to have a bug when merging cobertura.ser 
> files. The order in which you merge the files appears to matter.

This is interesting, can you please elaborate? 
i'm running multiple testing jobs (in devel more, i.e i compile the sources), each job creates a cobertura.ser file.
once all jobs finish, i run a merge job that merges all cobertura.ser files. 

how do i know what is the correct order or merge to use in order to get the right results? 

You don't. At least I don't. I just made the experience that merging in different orders gives different results. This looks like a bug to me. I have worked around it now by making sure that one and the same cobertura.ser file is used for instrumentation of all classes and for all tests run.

Best regards,
Florian
 
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