Random reader macOS error example

main.go

package main

import (
	"crypto/rand"
	"fmt"
)

func main() {
	for i := 1; i <= 10000; i++ {
		n, err := rand.Reader.Read(make([]byte, 10))
		if n != 10 && err == nil {
			fmt.Printf("expected n=10, actial n=%d on i=%d", n, i)
			return
		}
	}
	fmt.Printf("ok")
}