//go:build testsuite || tester

package testdata

import (
	"crypto/sha512"
	"encoding/base64"
	"strconv"
)

// sum decodes s as [base64.StdEncoding] and panics if it is invalid or
// unexpectedly sized.
func sum(s string) [sha512.Size]byte {
	p, err := base64.StdEncoding.DecodeString(s)
	if err != nil {
		panic(err)
	}
	if len(p) != sha512.Size {
		panic("unexpected checksum sized " + strconv.Itoa(len(p)))
	}
	return ([sha512.Size]byte)(p)
}