Message about missing Python test scripts

cmake_support/PROMOD3.cmake

@@ -719,6 +719,10 @@ macro(promod3_unittest)
     endif()
 
     foreach(py_test ${PY_TESTS})
+      set(py_twp "${CMAKE_CURRENT_SOURCE_DIR}/${py_test}")
+      if(NOT EXISTS "${py_twp}")
+        message(FATAL_ERROR "Python test script does not exist: ${py_twp}")
+      endif()
       set(python_path $ENV{PYTHONPATH})
       if(python_path)
         set(python_path "${python_path}:")
@@ -730,7 +734,7 @@ macro(promod3_unittest)
    "${python_path}${OST_ROOT}/${LIB_DIR}/python${PYTHON_VERSION}/site-packages")
       set (PY_TESTS_CMD "PYTHONPATH=${python_path}  ${PYTHON_BINARY}")
       add_custom_target("${py_test}_run"
-                  sh -c "${PY_TESTS_CMD} ${CMAKE_CURRENT_SOURCE_DIR}/${py_test}"
+                  sh -c "${PY_TESTS_CMD} ${py_twp}"
                 WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
                 COMMENT "running checks ${py_test}" VERBATIM)
       add_dependencies("${py_test}_run" "test_data_${_ARG_MODULE}")
@@ -739,7 +743,7 @@ macro(promod3_unittest)
       # continues and we get output for all unit tests. Just calling 'echo'
       # giveth $?=0.
       add_custom_target("${py_test}_run_xml"
-      sh -c "${PY_TESTS_CMD} ${CMAKE_CURRENT_SOURCE_DIR}/${py_test} xml || echo"
+      sh -c "${PY_TESTS_CMD} ${py_twp} xml || echo"
                 WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
                 COMMENT "running checks ${py_test}" VERBATIM)
       add_dependencies("${py_test}_run_xml" "test_data_${_ARG_MODULE}")