ceremonyclient/nekryptology/internal/hash_test.go
2023-07-05 00:32:28 -05:00

63 lines
1.2 KiB
Go

//
// Copyright Coinbase, Inc. All Rights Reserved.
//
// SPDX-License-Identifier: Apache-2.0
//
package internal
import (
"bytes"
"testing"
"github.com/stretchr/testify/require"
)
func TestByteSub(t *testing.T) {
f := bytes.Repeat([]byte{0xFF}, 32)
ByteSub(f)
require.Equal(t, f[0], byte(0xFE))
for i := 1; i < len(f); i++ {
require.Equal(t, f[i], byte(0xFF))
}
ByteSub(f)
require.Equal(t, f[0], byte(0xFD))
for i := 1; i < len(f); i++ {
require.Equal(t, f[i], byte(0xFF))
}
f[0] = 0x2
ByteSub(f)
for i := 1; i < len(f); i++ {
require.Equal(t, f[i], byte(0xFF))
}
ByteSub(f)
require.Equal(t, f[0], byte(0xFF))
require.Equal(t, f[1], byte(0xFE))
for i := 2; i < len(f); i++ {
require.Equal(t, f[i], byte(0xFF))
}
ByteSub(f)
require.Equal(t, f[0], byte(0xFE))
require.Equal(t, f[1], byte(0xFE))
for i := 2; i < len(f); i++ {
require.Equal(t, f[i], byte(0xFF))
}
f[0] = 1
f[1] = 1
ByteSub(f)
require.Equal(t, f[0], byte(0xFF))
require.Equal(t, f[1], byte(0xFF))
require.Equal(t, f[2], byte(0xFE))
for i := 3; i < len(f); i++ {
require.Equal(t, f[i], byte(0xFF))
}
}
func TestByteSubAll1(t *testing.T) {
f := bytes.Repeat([]byte{0x1}, 32)
ByteSub(f)
for i := 0; i < len(f); i++ {
require.Equal(t, f[i], byte(0xFF))
}
}