Cmake with fruit tests - testing

Question

I have a project that uses fruit for testing (fortran code).
This is my code.
calculator.f90
module calculator
implicit none
contains
subroutine add (a, b, output)
integer, intent(in) :: a, b
integer, intent(out):: output
output = a+b
end subroutine add
end module calculator
And my test calculator_test.f90
module calculator_test
use fruit
contains
subroutine test_5_2_2
use calculator, only: add
integer :: result
call add(2,2,result)
call assertEquals(4,result)
end subroutine test_5_2_2
subroutine test_5_2_3
use calculator, only: add
integer :: result
call add(2,3,result)
call assertEquals(5,result)
end subroutine test_5_2_3
end module
Now I'd like to use Cmake to build and run my tests (triggered by jenkins), so my question is: Do I need to change the tests or is it possible to just run the test I've written through cmake, and if so how?
I've searched a lot online but all testing with cmake seems to be done with c++ and then by using executeable testfiles files.
Thanks!
-Minde

Answer 1

You can run the tests you have written as is, you just need to tell CMake how to run them. This is what the COMMAND argument to ADD_TEST is for.
ENABLE_TESTING()
ADD_TEST(NAME "YourTest"
WORKING_DIRECTORY ${TEST_DIRECTORY}
COMMAND ${TEST_DIRECTORY}/test_dim)
Usually, you see some example like the one above, where the command is an executable (as you have seen in c++ examples). But it doesn't have to be. For example, I am running python tests through CMake, and I add the test like so:
ADD_TEST(NAME PythonTests
WORKING_DIRECTORY ${TEST_DIRECTORY}
COMMAND ${PYTHON_EXECUTABLE} setup.py test
So, to run your Fruit tests, you would call the command that creates the Fruit test runner for you (I believe it is a rake command... I will assume this is true below, but you should substitute for whatever you actually call on the command line to run your tests):
ADD_TEST(NAME FruitTests
WORKING_DIRECTORY ${TEST_DIRECTORY}
COMMAND rake test) # Or whatever the command is.
When you run make test on the command line, it should tell you if "FruitTests" failed or succeeded.
A word of caution CMake determines the success or failure of the test by the exit code of the program. By default Fortran programs do not have a exit code (or if they do, it is always 0). When I use Fruit and CMake to do my Fortran tests, I write the test runner myself and use the call exit(exit_code) builtin subroutine to make sure an exit code is returned to CMake. I am not sure if Fruit's automatic test runner creator does this; you will have to verify this yourself.