adjust xvfb call in testing

.github/runtests.sh

@@ -7,6 +7,8 @@ function exitIfError {
 	# currently octave 6 can finish with a segfault when the program is closed due to some bug, for now we try to ignore it
 	if [ "$1" -ne 0 ] && [ "$1" -ne 139 ]; then
 		exit $1;
+	else
+		exit 0;
 	fi
 }
 
@@ -39,11 +41,5 @@ export CONTINUOUS_INTEGRATION=true
 export CI=true
 
 ## Actually run the test suite
-cd unitTest
-TESTDIR=`pwd`
-# also CD in MATLAB/Octave to make sure that startup files
-# cannot play any role in setting the path
-${Runner} ${Switches} "cd('${TESTDIR}'); matRad_runTests" > ../runtests.log #2> ../runtests.err put stdout to log, but let it print error messages
+${Runner} ${Switches} "matRad_runTests" > ../runtests.log #2> ../runtests.err put stdout to log, but let it print error messages
 exitIfError $?
-cd ..
-

.github/workflows/tests.yml

@@ -31,10 +31,11 @@ jobs:
         uses: GabrielBB/xvfb-action@v1 #For Headless tests
         with:
           run: .github/runtests.sh octave-cli
+          working-directory: ./unitTest
       - name: Upload logs if test fails
         uses: actions/upload-artifact@v3
         if: failure()
         with:
           name: Test Log
-          path: runtests.log
+          path: ./unitTest/runtests.log