trigger python rostest with catkin_make test

edit

the goal:

I want to trigger a python unit-test trough rostest in the ros-enviroment by calling catkin_make test in the package-root.

the version of ros is hydro with python 2.7.3

what works:

along the official instructions i wrote the test which works fine when calling it with the command rostest jenkins_test_repro testAll.test and the related "launch"-file as described here.

also working fine when direct executing the script...

test-output:

/home/USER/VirtEnvPython/bin/python /home/USER/sandbox/metric_tester/src/jenkins_test_repro/scripts/TestMetricStarter.py
[ROSUNIT] Outputting test results to /home/USER/.ros/test_results/jenkins_test_repro/rosunit-MetricStarter.xml
test_server_feedback ... ok
test_true ... ok
-------------------------------------------------------------
SUMMARY:
 * RESULT: SUCCESS
 * TESTS: 2
 * ERRORS: 0 []
 * FAILURES: 0 []

test-file:

#!/usr/bin/env python
PKG = 'jenkins_test_repro'
#import roslib; roslib.load_manifest(PKG)  # This line is not needed with Catkin.

import sys
import os
import rostest
import unittest
import requests

class TestMetricStarter(unittest.TestCase):

    def test_server_feedback(self):
        r = requests.get('http://SRV-ADR/MetricServer/default/index/MetricStarter' + os.getcwd())
        self.assertEqual(r.status_code, 200)

    def test_true(self):
        self.assertTrue(True)

if __name__ == '__main__':
    rostest.rosrun(PKG, 'MetricStarter', TestMetricStarter)

"launch"-file:

<launch>
    <test test-name="MetricStarter" pkg="jenkins_test_repro" type="TestMetricStarter.py" />
</launch>

the problem:

for invoking the test-stuff trough catkin_make test i need add the test in the CMakeLists.txt. i figured out 3 ways to do this and for me it's still unclear what i really need to do. for all ways i have done a clean build (removing build / devel and rebuilding catkin-workspace)

1. because of the useage of rostest and the analogy to the working command-line-execution

   add_rostest(test/testAll.test)
   

   but the test seems not to be executed:

   Running tests...
   Test project /home/USER/sandbox/metric_tester/build
       Start 1: _ctest_jenkins_test_repro_rostest_test_testAll.test
   1/1 Test #1: _ctest_jenkins_test_repro_rostest_test_testAll.test ...   Passed    1.64 sec
   
   100% tests passed, 0 tests failed out of 1
   
   Total Test time (real) =   1.65 sec
   catkin_make test  4.58s user 0.54s system 79% cpu 6.404 total
   

   i also tried it with

   add_rostest(scripts/TestMetricStarter.py)
   

   witch leads to following error

   Running tests...
   Test project /home/USER/sandbox/metric_tester/build
       Start 1: _ctest_jenkins_test_repro_rostest_scripts_TestMetricStarter.py
   1/1 Test #1: _ctest_jenkins_test_repro_rostest_scripts_TestMetricStarter.py ...***Failed    0.46 sec
   
   0% tests passed, 1 tests failed out of 1
   
   Total Test time (real) =   0.47 sec
   
   The following tests FAILED:
         1 - _ctest_jenkins_test_repro_rostest_scripts_TestMetricStarter.py (Failed)
   Errors while running CTest
   make: *** [test] Error 8
   Invoking "make" failed
   

2. just tried while it had something to do with rostest,

   add_rostest_gtest(jenkins_test_repro test/testAll.test scripts/TestMetricStarter.py)
   

   but seems to be c/c++ stuff due to the output and the requested linker language

   CMake Error: CMake can not determine linker language for target:jenkins_test_repro
   CMake Error: Cannot determine link language for target "jenkins_test_repro".
   -- Generating done
   -- Build files have been written to: /home/USER/sandbox/metric_tester/build
   make: *** [cmake_check_build_system] Error 1
   

3. in the official guide is a section for running tests as part of make tests

   this leads into a similar behaviour as in the first way

   catkin_add_nosetests(test/testAll.test)
   

   same as with add_rostest(scripts/TestMetricStarter.py ...