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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package trie
import (
"bytes"
crand "crypto/rand"
"encoding/hex"
"math/rand"
"testing"
)
func TestHexCompact(t *testing.T) {
tests := []struct{ hex, compact []byte }{
// empty keys, with and without terminator.
{hex: []byte{}, compact: []byte{0x00}},
{hex: []byte{16}, compact: []byte{0x20}},
// odd length, no terminator
{hex: []byte{1, 2, 3, 4, 5}, compact: []byte{0x11, 0x23, 0x45}},
// even length, no terminator
{hex: []byte{0, 1, 2, 3, 4, 5}, compact: []byte{0x00, 0x01, 0x23, 0x45}},
// odd length, terminator
{hex: []byte{15, 1, 12, 11, 8, 16 /*term*/}, compact: []byte{0x3f, 0x1c, 0xb8}},
// even length, terminator
{hex: []byte{0, 15, 1, 12, 11, 8, 16 /*term*/}, compact: []byte{0x20, 0x0f, 0x1c, 0xb8}},
}
for _, test := range tests {
if c := hexToCompact(test.hex); !bytes.Equal(c, test.compact) {
t.Errorf("hexToCompact(%x) -> %x, want %x", test.hex, c, test.compact)
}
if h := compactToHex(test.compact); !bytes.Equal(h, test.hex) {
t.Errorf("compactToHex(%x) -> %x, want %x", test.compact, h, test.hex)
}
}
}
func TestHexKeybytes(t *testing.T) {
tests := []struct{ key, hexIn, hexOut []byte }{
{key: []byte{}, hexIn: []byte{16}, hexOut: []byte{16}},
{key: []byte{}, hexIn: []byte{}, hexOut: []byte{16}},
{
key: []byte{0x12, 0x34, 0x56},
hexIn: []byte{1, 2, 3, 4, 5, 6, 16},
hexOut: []byte{1, 2, 3, 4, 5, 6, 16},
},
{
key: []byte{0x12, 0x34, 0x5},
hexIn: []byte{1, 2, 3, 4, 0, 5, 16},
hexOut: []byte{1, 2, 3, 4, 0, 5, 16},
},
{
key: []byte{0x12, 0x34, 0x56},
hexIn: []byte{1, 2, 3, 4, 5, 6},
hexOut: []byte{1, 2, 3, 4, 5, 6, 16},
},
}
for _, test := range tests {
if h := keybytesToHex(test.key); !bytes.Equal(h, test.hexOut) {
t.Errorf("keybytesToHex(%x) -> %x, want %x", test.key, h, test.hexOut)
}
if k := hexToKeybytes(test.hexIn); !bytes.Equal(k, test.key) {
t.Errorf("hexToKeybytes(%x) -> %x, want %x", test.hexIn, k, test.key)
}
}
}
func TestHexToCompactInPlace(t *testing.T) {
for i, key := range []string{
"00",
"060a040c0f000a090b040803010801010900080d090a0a0d0903000b10",
"10",
} {
hexBytes, _ := hex.DecodeString(key)
exp := hexToCompact(hexBytes)
sz := hexToCompactInPlace(hexBytes)
got := hexBytes[:sz]
if !bytes.Equal(exp, got) {
t.Fatalf("test %d: encoding err\ninp %v\ngot %x\nexp %x\n", i, key, got, exp)
}
}
}
func TestHexToCompactInPlaceRandom(t *testing.T) {
for i := 0; i < 10000; i++ {
l := rand.Intn(128)
key := make([]byte, l)
crand.Read(key)
hexBytes := keybytesToHex(key)
hexOrig := []byte(string(hexBytes))
exp := hexToCompact(hexBytes)
sz := hexToCompactInPlace(hexBytes)
got := hexBytes[:sz]
if !bytes.Equal(exp, got) {
t.Fatalf("encoding err \ncpt %x\nhex %x\ngot %x\nexp %x\n",
key, hexOrig, got, exp)
}
}
}
func BenchmarkHexToCompact(b *testing.B) {
testBytes := []byte{0, 15, 1, 12, 11, 8, 16 /*term*/}
for i := 0; i < b.N; i++ {
hexToCompact(testBytes)
}
}
func BenchmarkCompactToHex(b *testing.B) {
testBytes := []byte{0, 15, 1, 12, 11, 8, 16 /*term*/}
for i := 0; i < b.N; i++ {
compactToHex(testBytes)
}
}
func BenchmarkKeybytesToHex(b *testing.B) {
testBytes := []byte{7, 6, 6, 5, 7, 2, 6, 2, 16}
for i := 0; i < b.N; i++ {
keybytesToHex(testBytes)
}
}
func BenchmarkHexToKeybytes(b *testing.B) {
testBytes := []byte{7, 6, 6, 5, 7, 2, 6, 2, 16}
for i := 0; i < b.N; i++ {
hexToKeybytes(testBytes)
}
}