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