Re: [Boost-users] Unit Test for vc++ exe project possible?

Subject: Re: [Boost-users] Unit Test for vc++ exe project possible?
From: Richard (legalize+jeeves_at_[hidden])
Date: 2013-04-15 00:54:58

[Please do not mail me a copy of your followup]

boost-users_at_[hidden] spake the secret code
<1365867152886-4645293.post_at_[hidden]> thusly:

>I see a good tutorial for Boost Test using Visual Studio.
>(http://legalizeadulthood.wordpress.com/2009/07/04/c-unit-tests-with-boost-test-part-1/)

Thanks.

>But it looks like only forstatic or dynamic library.
>
>Is that possible to unit test the exe production project using Boost Test? 

This isn't really possible due to the way that the C/C++ link
mechanism works.

What you need to do is to refactor your executable into a simple
delegating stub for main() and a static library for all the other
code.

Then you can unit test everything in the static library (including
your new main).

For instance, you start with:

main.cpp:
int main(int argc, char *argv[])
{
        // some code you want to test

        return 0;
}

Rename this function to exe_main:

exe_main.cpp:
int exe_main(int argc, char *argv[])
{
        // some code you want to test

        return 0;
}

and create a delegating stub:

main.cpp:
extern int exe_main(int argc, char* argv[]);
int main(int argc, char* argv[])
{
        return exe_main(argc, argv);
}

Then move exe_main.cpp and all the other cpp files into a static
library.  Then you can unit test everything.
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