IMP: tests readability and runtime error handling

Change describe display to add underline in order to make it more
noticeable in a stream of logs
Add a `fatal` message when catching a runtime error (until
`$totalerrors` has not been modified yet)

tests/launch_tests.sh

@@ -12,6 +12,9 @@ totalerrors=255
 
 cleanup_and_exit() {
     rm -rf "$mytmpdir"
+    if [ "$totalerrors" -eq 255 ]; then
+        fatal "RUNTIME ERROR"
+    fi
     exit $totalerrors
 }
 trap "cleanup_and_exit" EXIT HUP INT
@@ -42,9 +45,11 @@ declare -a REGISTERED_TESTS
 #####################
 # in case a fatal event occurs, fatal logs and exits with return code 1
 fatal() {
+    printf "\033[1;91m###### \033[0m\n" >&2
     printf "%b %b\n" "\033[1;91mFATAL\033[0m" "$*" >&2
     printf "%b \n" "\033[1;91mEXIT TEST SUITE WITH FAILURE\033[0m" >&2
-    exit 1
+    trap - EXIT
+    exit 255
 }
 # prints that a test failed
 fail() {

tests/lib.sh

@@ -8,7 +8,7 @@
 # describe <STRING>
 describe() {
     # shellcheck disable=2154
-    printf "\033[36mxxx %s::%s \033[0m\n" "$name" "$*"
+    printf "\033[4;36mxxx %s::%s \033[0m\n" "$name" "$*"
 }
 
 # Register an assertion on an audit before running it