1 files changed, 27 insertions, 0 deletions
diff --git a/_content/doc/tutorial/fuzz/main.go b/_content/doc/tutorial/fuzz/main.go
new file mode 100644
index 0000000..3ed6f2b
--- /dev/null
+++ b/_content/doc/tutorial/fuzz/main.go
@@ -0,0 +1,27 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"unicode/utf8"
+)
+
+func Reverse(s string) (string, error) {
+	if !utf8.ValidString(s) {
+		return s, errors.New("input is not valid UTF-8")
+	}
+	r := []rune(s)
+	for i, j := 0, len(r)-1; i < len(r)/2; i, j = i+1, j-1 {
+		r[i], r[j] = r[j], r[i]
+	}
+	return string(r), nil
+}
+
+func main() {
+	input := "The quick brown fox jumped over the lazy dog"
+	rev, revErr := Reverse(input)
+	doubleRev, doubleRevErr := Reverse(rev)
+	fmt.Printf("original: %q\n", input)
+	fmt.Printf("reversed: %q, err: %v\n", rev, revErr)
+	fmt.Printf("reversed again: %q, err: %v\n", doubleRev, doubleRevErr)
+}