before subshell error test hint

test/miaou-bash.test.bash

@@ -22,9 +22,10 @@ function strip_ansi {
 
 function fail_type {
   ((TEST_COUNT++))
-  local i line first error_start_above regex
+  local i line first error_start_above regex hint_message
+  hint_message="${3:-}"
   mapfile -t stderr <<<"$(./test/stub/scenario.bash "$1" 2>&1 >/dev/null)"
-  # echo "stderr countains ${#stderr[@]}"
+  echo "stderr countains ${#stderr[@]}"
   error_start_above=false
   regex="║[[:blank:]]+([A-Z|_]+)"
   for i in "${stderr[@]}"; do
@@ -40,6 +41,7 @@ function fail_type {
       fi
     fi
   done
+  [[ -n "${hint_message}" ]] && echo "hint message to find out..."
   echo "error in: $1" && return 1
 }
 
@@ -55,8 +57,7 @@ fail_type command_not_found COMMAND_NOT_FOUND
 fail_type exit EXIT
 fail_type source_not_found SOURCE_NOT_FOUND
 fail_type file_not_found FILE_NOT_FOUND
-fail_type subshell_source_not_found SUBSHELL_SOURCE_NOT_FOUND
-fail_type subshell_error SUBSHELL_ERROR
+fail_type subshell_error COMMAND_NOT_FOUND '(hint: prefer source than subshell)'
 
 failed=$((TEST_COUNT - SUCCESS_COUNT))