How to force cmake to write test output after make test - testing

Question

I'm building fortran project with cmake and I can't find solution to print to console FRUIT test results, they look something like these:
Test module initialized
. : successful assert, F : failed assert
7.00000000000000 -3.60000000000000 7.00000000000000
FFF
Start of FRUIT summary:
Some tests failed!
-- Failed assertion messages:
[_not_set_]:Expected [7.00000000000000], Got [1.00000000000000]
[_not_set_]:Expected [-3.60000000000000], Got [2.00000000000000]
[_not_set_]:Expected [7.00000000000000], Got [6.00000000000000]
-- end of failed assertion messages.
Total asserts : 3
Successful : 0
Failed : 3
Successful rate: 0.00%
Successful asserts / total asserts : [ 0 / 3 ]
Successful cases / total cases : [ 0 / 0 ]
-- end of FRUIT summary
The output I'm getting with make test looks like:
make test
Running tests...
Test project /home/konrad/Desktop/fortran
Start 1: unit_tests
1/1 Test #1: unit_tests ....................... Passed 0.01 sec
100% tests passed, 0 tests failed out of 1
Total Test time (real) = 0.01 sec
And since passing cmake tests doesn't mean passing FRUIT ones, I want to print FRUIT file everytime I run tests (just for the sake of making it work). I've tried adding printing commands at the end of test command (like this less), adding
-P ${CMAKE_TEST_DIR}/unit_tests.txt
at the end of add_test, building custom after build commands (which I can't make to run after make test so if you knew how to do that would solve it as well, seems like make test or test is not really a target)
Last part of my cmake file with all the testing code:
add_executable(task ${TASK_SOURCES})
add_executable(tests ${TEST_SOURCES})
enable_testing()
set(run_command "${CMAKE_BINARY_DIR}/tests")
set(UNIT_TEST_NAME "unit_tests.txt")
file(MAKE_DIRECTORY ${CMAKE_TEST_DIR})
add_test( NAME unit_tests
COMMAND sh -c
"rm -f ${CMAKE_TEST_DIR}/${UNIT_TEST_NAME} \
&& ${run_command} \
>> ${CMAKE_TEST_DIR}/${UNIT_TEST_NAME} \
&& less ${CMAKE_TEST_DIR}/${UNIT_TEST_NAME}"
)

Answer 1

I have solved a lack of tests output with custom CMake target that will invoke ctest in verbose mode etc.
e.g.
enable_testing()
add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND}
--force-new-ctest-process
--verbose
--output-on-failure
)

Answer 2

The output of cmake tests is captured to a file (Testing/Temporary/LastTest.log in my current project).
cmake tests rely on the return code of the test program, with one test program per test.
If you wish to run a program that is a "driver" for your tests, I recommend to use add_custom_target. This commands will add a target that runs a command of your choice.
For instance:
add_custom_target(Name unit_tests tests)
add_dependencies(unit_tests tests)
I am not sure whether the add_dependencies line is needed in this case though (as tests is a target managed by cmake).
Then, you can run
make unit_tests
and it will run your test driver.