Re: [boost] CMake and Boost Build tests

Subject: Re: [boost] CMake and Boost Build tests
From: John Maddock (jz.maddock_at_[hidden])
Date: 2017-07-27 09:16:11

On 26/07/2017 20:42, paul via Boost wrote:
> On Wed, 2017-07-26 at 14:49 -0400, Edward Diener via Boost wrote:
>> Following John Maddock's appeal for practical solutions related to the
>> move to CMake, I would like to know what the CMake equivalent is to the
>> Boost Build unit test functionality.
>>
>> In other words what do I write for CMake in order to do a Boost Build
>> compile, compile-fail, link, link-fail, run, and run-fail unit tests ?
> For a run test, you would do, something like:
>
> add_executable(footest footest.cpp)
> add_test(NAME footest COMMAND $<TARGET_FILE:footest>)
>
> For a compile/link test:
>
> add_library(footest STATIC EXCLUDE_FROM_ALL footest.cpp)
> add_test(NAME footest COMMAND ${CMAKE_COMMAND} --build . --target footest --
> config $<CONFIGURATION> WORKING_DIRECTORY ${CMAKE_BINARY_DIR})

I think I'm losing the will to live looking at that :(

>
> To make the tests with expected failures, just set a property:
>
> set_tests_properties(footest PROPERTIES WILL_FAIL TRUE)
>
> You also can check for certain output, which nice for checking that the
> compile fail tests has triggered the static assert.
>
> Ideally, the BCMTest module can make this simpler:
>
> http://bcm.readthedocs.io/en/latest/src/BCMTest.html
>
> Which you can write the equivalent tests like this:
>
> Run test:
> bcm_test(NAME footest SOURCES footest.cpp)
>
> Run fail test:
> bcm_test(NAME footest SOURCES footest.cpp WILL_FAIL)
>
> Compile test:
> bcm_test(NAME footest SOURCES footest.cpp COMPILE_ONLY)
>
> Compile fail test:
> bcm_test(NAME footest SOURCES footest.cpp COMPILE_ONLY WILL_FAIL)

That looks way better!

I assume we can also add annotation for things like:

* Defines.
* Configuration if-then-else logic.
* Compiler specific flags (probably in conjunction with some 
configuration test).

Thanks, John.

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