38 lines
855 B
Go
38 lines
855 B
Go
// Copyright (c) 2021 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package field
|
|
|
|
import (
|
|
"math/big"
|
|
"testing"
|
|
"testing/quick"
|
|
)
|
|
|
|
var bigP = new(big.Int).Sub(new(big.Int).Lsh(big.NewInt(1), 255), big.NewInt(19))
|
|
|
|
func TestSetWideBytes(t *testing.T) {
|
|
f1 := func(in [64]byte, fe Element) bool {
|
|
fe1 := new(Element).Set(&fe)
|
|
|
|
if out, err := fe.SetWideBytes([]byte{42}); err == nil || out != nil ||
|
|
fe.Equal(fe1) != 1 {
|
|
return false
|
|
}
|
|
|
|
if out, err := fe.SetWideBytes(in[:]); err != nil || out != &fe {
|
|
return false
|
|
}
|
|
|
|
b := new(big.Int).SetBytes(swapEndianness(in[:]))
|
|
fe1.fromBig(b.Mod(b, bigP))
|
|
|
|
return fe.Equal(fe1) == 1 && isInBounds(&fe) && isInBounds(fe1)
|
|
}
|
|
if err := quick.Check(f1, nil); err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
}
|