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package p2p
import (
"bytes"
"os"
"path/filepath"
"testing"
"github.com/stretchr/testify/assert"
cmn "github.com/tendermint/tendermint/libs/common"
)
func TestLoadOrGenNodeKey(t *testing.T) {
filePath := filepath.Join(os.TempDir(), cmn.RandStr(12)+"_peer_id.json")
nodeKey, err := LoadOrGenNodeKey(filePath)
assert.Nil(t, err)
nodeKey2, err := LoadOrGenNodeKey(filePath)
assert.Nil(t, err)
assert.Equal(t, nodeKey, nodeKey2)
}
//----------------------------------------------------------
func padBytes(bz []byte, targetBytes int) []byte {
return append(bz, bytes.Repeat([]byte{0xFF}, targetBytes-len(bz))...)
}
func TestPoWTarget(t *testing.T) {
targetBytes := 20
cases := []struct {
difficulty uint
target []byte
}{
{0, padBytes([]byte{}, targetBytes)},
{1, padBytes([]byte{127}, targetBytes)},
{8, padBytes([]byte{0}, targetBytes)},
{9, padBytes([]byte{0, 127}, targetBytes)},
{10, padBytes([]byte{0, 63}, targetBytes)},
{16, padBytes([]byte{0, 0}, targetBytes)},
{17, padBytes([]byte{0, 0, 127}, targetBytes)},
}
for _, c := range cases {
assert.Equal(t, MakePoWTarget(c.difficulty, 20*8), c.target)
}
}