[REGRESSION] adding even more diognostic output to regression testing…

… (- WIP #46 & #49 -)

### ChangeLog:

Changes in file tests/check_codecov_regression:
 elif [[ ( -d $(git rev-parse --show-toplevel 2>/dev/null) ) ]] ; then

tests/check_codecov_regression

@@ -130,6 +130,15 @@ else
 	EXIT_CODE=1
 fi
 
+if [[ (${EXIT_CODE} -eq 0) ]] ; then
+	$(QUIET)runner=`$(PYTHON) -m pip freeze --all | grep --count -oF pytest` ; \
+	if [[ ( $(command python3 -B -m pip freeze --all | grep --count -oF pytest) -le 0 ) ]] ; then
+		printf "\t\t%s\n" "FAIL: No python framework (pytest) found for test." ;
+		EXIT_CODE=126 ;
+		command python3 -B -m pip freeze --all 2>/dev/null || true ;
+	fi
+fi
+
 if [[ (${EXIT_CODE} -eq 0) ]] ; then
 	test -r "${_TEST_ROOT_DIR}/Makefile" 1>/dev/null 2>&1 || EXIT_CODE=2 ;
 	if [[ (${EXIT_CODE} -ne 0) ]] ; then