RFC: Enabling -DKDE4_BUILD_TESTS=ON by default

[Albert Astals Cid]

Hi fellow kde-core-develers, i was thinking that from time to time someone 
commits some code that breaks the building of the tests.

This happens because people is not aware that those parts are unit tested.

I think that by enabling the building of the tests by default we at least make 
sure the tests will build and maybe when people see their code actually 
breaking the compilation of a unit test we get them to run them and maybe even 
improve them :-)

Of course, enabling building the tests by defaults makes compilation times a 
bit longer, but I do think that the benefits far surpass the problems and for 
people with really slow machines and/or needs to recompile stuff a lot there 
is always the possibility that they can ask cmake not to build the tests.

Comments?

Cheers,
  Albert