test.sh: skip hidden files and example.txt

test.sh

@@ -25,11 +25,20 @@ run_solution() {
 	fi
 }
 
+shopt -s dotglob
+
 for day in day*; do
 	input=data/$day.input
 	expected=data/$day.expected
 	for solution in "$day"/*; do
 		echo -n "$solution... "
+
+		case "${solution##*/}" in
+			example.txt|.*)
+				echo SKIP
+				continue
+		esac
+
 		solution_output=$(mktemp)
 		trap "rm -f '$solution_output'" EXIT
 		run_solution "$solution" > "$solution_output"