package understanding

import (
    "strings"
    "testing"
)

func runeNormalize(s string) string {
    b := new(strings.Builder)
    for _, r := range s {
        b.WriteRune(r)
    }

    return b.String()
}

func TestString(t *testing.T) {
    x, y := "\xff", "\xfe"

    if string(x) != string(y) {
        t.Errorf("strings compare according to runes?")
    }

    if runeNormalize(x) == runeNormalize(y) {
        t.Errorf("runes are something other than utf8.RuneError?")
    }
}