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// 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)
}
}
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