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How validating a validated software for a new environment?

Posted on 2011-09-08
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Hello,

I've developed an add-in for Microsoft Excel 2007 and validated it by covering all the software requirements by tests, which have been executed, recorded, analysed and documented.

I've made a new version of the add-in for Microsoft Excel 2010, the functionalities are exactly the same (it's the same code), but I've just changed the setup project to create different registry keys during the installation, and the version of the .NET framework used is different (.NET 4 instead of .NET 2).

I'm not sure about what to do for validating this new version of the add-in in a quick but correct manner. As the code has not changed, I think I should not re-test all the software requirements.
I'm thinking about documenting a risk analysis to list the changes between Office 2007 and Office 2010 that could affect the add-in and determine if some functionalities have to be re-tested. Then testing these functionalities (if any) and the new installer (by checking that the add-in and the pre-requisites are correctly installed, and the add-in is correctly loaded in Excel after installation), and make some general testing to verify that the critical functionalities are working.

What do you think about this approach, would you have some comments or advice?

Thanks in advance,
Julien
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Question by:JulienVan
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LeeeRussell earned 500 total points
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You could use the method you suggest, but my worry would be that there is no way that you can find out what changes Microsoft has made to the underlying code between the two versions.  You might be able to analyse the functional differences between 2007 and 2010, but you won't know the internals.

Saying that, it still depends on a lot of factors.  If this plugin was a tool that I was releasing within the company I was working at, for internal use only, then I would say that your method was satisfactory.  If you are releasing this to the public as a product, then I would say that you need to re-run your tests.

Fundamentally, this may be the point where you start automating your tests and re-running them is very little effort.
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