Function randString

internal/examples/chat/chat_test.go:250–268

randString generates a random string with length n.

(n int)

// randString generates a random string with length n.
func randString(n int) string {
	b := make([]byte, n)
	_, err := rand.Reader.Read(b)
	if err != nil {
		panic(fmt.Sprintf("failed to generate rand bytes: %v", err))
	}

	s := strings.ToValidUTF8(string(b), "_")
	s = strings.ReplaceAll(s, "\x00", "_")
	if len(s) > n {
		return s[:n]
	}
	if len(s) < n {
		// Pad with =
		extra := n - len(s)
		return s + strings.Repeat("=", extra)
	}
	return s
}

// randInt returns a randomly generated integer between [0, max).
func randInt(max int) int {