github.com/shyftnetwork/go-empyrean@v1.8.3-0.20191127201940-fbfca9338f04/swarm/network/kademlia/address_test.go (about)

     1  // Copyright 2016 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package kademlia
    18  
    19  import (
    20  	"math/rand"
    21  	"reflect"
    22  	"testing"
    23  
    24  	"github.com/ShyftNetwork/go-empyrean/common"
    25  )
    26  
    27  func (Address) Generate(rand *rand.Rand, size int) reflect.Value {
    28  	var id Address
    29  	for i := 0; i < len(id); i++ {
    30  		id[i] = byte(uint8(rand.Intn(255)))
    31  	}
    32  	return reflect.ValueOf(id)
    33  }
    34  
    35  func TestCommonBitsAddrF(t *testing.T) {
    36  	a := Address(common.HexToHash("0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"))
    37  	b := Address(common.HexToHash("0x8123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"))
    38  	c := Address(common.HexToHash("0x4123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"))
    39  	d := Address(common.HexToHash("0x0023456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"))
    40  	e := Address(common.HexToHash("0x01A3456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"))
    41  	ab := CommonBitsAddrF(a, b, func() byte { return byte(0x00) }, 10)
    42  	expab := Address(common.HexToHash("0x8000000000000000000000000000000000000000000000000000000000000000"))
    43  
    44  	if ab != expab {
    45  		t.Fatalf("%v != %v", ab, expab)
    46  	}
    47  	ac := CommonBitsAddrF(a, c, func() byte { return byte(0x00) }, 10)
    48  	expac := Address(common.HexToHash("0x4000000000000000000000000000000000000000000000000000000000000000"))
    49  
    50  	if ac != expac {
    51  		t.Fatalf("%v != %v", ac, expac)
    52  	}
    53  	ad := CommonBitsAddrF(a, d, func() byte { return byte(0x00) }, 10)
    54  	expad := Address(common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000"))
    55  
    56  	if ad != expad {
    57  		t.Fatalf("%v != %v", ad, expad)
    58  	}
    59  	ae := CommonBitsAddrF(a, e, func() byte { return byte(0x00) }, 10)
    60  	expae := Address(common.HexToHash("0x0180000000000000000000000000000000000000000000000000000000000000"))
    61  
    62  	if ae != expae {
    63  		t.Fatalf("%v != %v", ae, expae)
    64  	}
    65  	acf := CommonBitsAddrF(a, c, func() byte { return byte(0xff) }, 10)
    66  	expacf := Address(common.HexToHash("0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"))
    67  
    68  	if acf != expacf {
    69  		t.Fatalf("%v != %v", acf, expacf)
    70  	}
    71  	aeo := CommonBitsAddrF(a, e, func() byte { return byte(0x00) }, 2)
    72  	expaeo := Address(common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000"))
    73  
    74  	if aeo != expaeo {
    75  		t.Fatalf("%v != %v", aeo, expaeo)
    76  	}
    77  	aep := CommonBitsAddrF(a, e, func() byte { return byte(0xff) }, 2)
    78  	expaep := Address(common.HexToHash("0x3fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"))
    79  
    80  	if aep != expaep {
    81  		t.Fatalf("%v != %v", aep, expaep)
    82  	}
    83  
    84  }
    85  
    86  func TestRandomAddressAt(t *testing.T) {
    87  	var a Address
    88  	for i := 0; i < 100; i++ {
    89  		a = RandomAddress()
    90  		prox := rand.Intn(255)
    91  		b := RandomAddressAt(a, prox)
    92  		if proximity(a, b) != prox {
    93  			t.Fatalf("incorrect address prox(%v, %v) == %v (expected %v)", a, b, proximity(a, b), prox)
    94  		}
    95  	}
    96  }