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// Copyright 2016 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 kademlia
import (
"math/rand"
"reflect"
"testing"
"github.com/ethereum/go-ethereum/common"
)
func (Address) Generate(rand *rand.Rand, size int) reflect.Value {
var id Address
for i := 0; i < len(id); i++ {
id[i] = byte(uint8(rand.Intn(255)))
}
return reflect.ValueOf(id)
}
func TestCommonBitsAddrF(t *testing.T) {
a := Address(common.HexToHash("0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"))
b := Address(common.HexToHash("0x8123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"))
c := Address(common.HexToHash("0x4123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"))
d := Address(common.HexToHash("0x0023456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"))
e := Address(common.HexToHash("0x01A3456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"))
ab := CommonBitsAddrF(a, b, func() byte { return byte(0x00) }, 10)
expab := Address(common.HexToHash("0x8000000000000000000000000000000000000000000000000000000000000000"))
if ab != expab {
t.Fatalf("%v != %v", ab, expab)
}
ac := CommonBitsAddrF(a, c, func() byte { return byte(0x00) }, 10)
expac := Address(common.HexToHash("0x4000000000000000000000000000000000000000000000000000000000000000"))
if ac != expac {
t.Fatalf("%v != %v", ac, expac)
}
ad := CommonBitsAddrF(a, d, func() byte { return byte(0x00) }, 10)
expad := Address(common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000"))
if ad != expad {
t.Fatalf("%v != %v", ad, expad)
}
ae := CommonBitsAddrF(a, e, func() byte { return byte(0x00) }, 10)
expae := Address(common.HexToHash("0x0180000000000000000000000000000000000000000000000000000000000000"))
if ae != expae {
t.Fatalf("%v != %v", ae, expae)
}
acf := CommonBitsAddrF(a, c, func() byte { return byte(0xff) }, 10)
expacf := Address(common.HexToHash("0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"))
if acf != expacf {
t.Fatalf("%v != %v", acf, expacf)
}
aeo := CommonBitsAddrF(a, e, func() byte { return byte(0x00) }, 2)
expaeo := Address(common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000"))
if aeo != expaeo {
t.Fatalf("%v != %v", aeo, expaeo)
}
aep := CommonBitsAddrF(a, e, func() byte { return byte(0xff) }, 2)
expaep := Address(common.HexToHash("0x3fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"))
if aep != expaep {
t.Fatalf("%v != %v", aep, expaep)
}
}
func TestRandomAddressAt(t *testing.T) {
var a Address
for i := 0; i < 100; i++ {
a = RandomAddress()
prox := rand.Intn(255)
b := RandomAddressAt(a, prox)
if proximity(a, b) != prox {
t.Fatalf("incorrect address prox(%v, %v) == %v (expected %v)", a, b, proximity(a, b), prox)
}
}
}
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