// Copyright 2017 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 network

import (
	"bytes"
	"fmt"
	"os"
	"testing"
	"time"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/log"
	"github.com/ethereum/go-ethereum/p2p"
	"github.com/ethereum/go-ethereum/p2p/enode"
	"github.com/ethereum/go-ethereum/p2p/protocols"
	"github.com/ethereum/go-ethereum/swarm/pot"
)

func init() {
	h := log.LvlFilterHandler(log.LvlWarn, log.StreamHandler(os.Stderr, log.TerminalFormat(true)))
	log.Root().SetHandler(h)
}

func testKadPeerAddr(s string) *BzzAddr {
	a := pot.NewAddressFromString(s)
	return &BzzAddr{OAddr: a, UAddr: a}
}

func newTestKademlia(b string) *Kademlia {
	params := NewKadParams()
	params.MinBinSize = 1
	params.MinProxBinSize = 2
	base := pot.NewAddressFromString(b)
	return NewKademlia(base, params)
}

func newTestKadPeer(k *Kademlia, s string, lightNode bool) *Peer {
	return NewPeer(&BzzPeer{BzzAddr: testKadPeerAddr(s), LightNode: lightNode}, k)
}

func On(k *Kademlia, ons ...string) {
	for _, s := range ons {
		k.On(newTestKadPeer(k, s, false))
	}
}

func Off(k *Kademlia, offs ...string) {
	for _, s := range offs {
		k.Off(newTestKadPeer(k, s, false))
	}
}

func Register(k *Kademlia, regs ...string) {
	var as []*BzzAddr
	for _, s := range regs {
		as = append(as, testKadPeerAddr(s))
	}
	err := k.Register(as...)
	if err != nil {
		panic(err.Error())
	}
}

// tests the validity of neighborhood depth calculations
//
// in particular, it tests that if there are one or more consecutive
// empty bins above the farthest "nearest neighbor-peer" then
// the depth should be set at the farthest of those empty bins
//
// TODO: Make test adapt to change in MinProxBinSize
func TestNeighbourhoodDepth(t *testing.T) {
	baseAddressBytes := RandomAddr().OAddr
	kad := NewKademlia(baseAddressBytes, NewKadParams())

	baseAddress := pot.NewAddressFromBytes(baseAddressBytes)

	closerAddress := pot.RandomAddressAt(baseAddress, 7)
	closerPeer := newTestDiscoveryPeer(closerAddress, kad)
	kad.On(closerPeer)
	depth := kad.NeighbourhoodDepth()
	if depth != 0 {
		t.Fatalf("expected depth 0, was %d", depth)
	}

	sameAddress := pot.RandomAddressAt(baseAddress, 7)
	samePeer := newTestDiscoveryPeer(sameAddress, kad)
	kad.On(samePeer)
	depth = kad.NeighbourhoodDepth()
	if depth != 0 {
		t.Fatalf("expected depth 0, was %d", depth)
	}

	midAddress := pot.RandomAddressAt(baseAddress, 4)
	midPeer := newTestDiscoveryPeer(midAddress, kad)
	kad.On(midPeer)
	depth = kad.NeighbourhoodDepth()
	if depth != 5 {
		t.Fatalf("expected depth 5, was %d", depth)
	}

	kad.Off(midPeer)
	depth = kad.NeighbourhoodDepth()
	if depth != 0 {
		t.Fatalf("expected depth 0, was %d", depth)
	}

	fartherAddress := pot.RandomAddressAt(baseAddress, 1)
	fartherPeer := newTestDiscoveryPeer(fartherAddress, kad)
	kad.On(fartherPeer)
	depth = kad.NeighbourhoodDepth()
	if depth != 2 {
		t.Fatalf("expected depth 2, was %d", depth)
	}

	midSameAddress := pot.RandomAddressAt(baseAddress, 4)
	midSamePeer := newTestDiscoveryPeer(midSameAddress, kad)
	kad.Off(closerPeer)
	kad.On(midPeer)
	kad.On(midSamePeer)
	depth = kad.NeighbourhoodDepth()
	if depth != 2 {
		t.Fatalf("expected depth 2, was %d", depth)
	}

	kad.Off(fartherPeer)
	log.Trace(kad.string())
	time.Sleep(time.Millisecond)
	depth = kad.NeighbourhoodDepth()
	if depth != 0 {
		t.Fatalf("expected depth 0, was %d", depth)
	}
}

func testSuggestPeer(k *Kademlia, expAddr string, expPo int, expWant bool) error {
	addr, o, want := k.SuggestPeer()
	if binStr(addr) != expAddr {
		return fmt.Errorf("incorrect peer address suggested. expected %v, got %v", expAddr, binStr(addr))
	}
	if o != expPo {
		return fmt.Errorf("incorrect prox order suggested. expected %v, got %v", expPo, o)
	}
	if want != expWant {
		return fmt.Errorf("expected SuggestPeer to want peers: %v", expWant)
	}
	return nil
}

func binStr(a *BzzAddr) string {
	if a == nil {
		return "<nil>"
	}
	return pot.ToBin(a.Address())[:8]
}

func TestSuggestPeerBug(t *testing.T) {
	// 2 row gap, unsaturated proxbin, no callables -> want PO 0
	k := newTestKademlia("00000000")
	On(k,
		"10000000", "11000000",
		"01000000",

		"00010000", "00011000",
	)
	Off(k,
		"01000000",
	)
	err := testSuggestPeer(k, "01000000", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}
}

func TestSuggestPeerFindPeers(t *testing.T) {
	// 2 row gap, unsaturated proxbin, no callables -> want PO 0
	k := newTestKademlia("00000000")
	On(k, "00100000")
	err := testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	// 2 row gap, saturated proxbin, no callables -> want PO 0
	On(k, "00010000")
	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	// 1 row gap (1 less), saturated proxbin, no callables -> want PO 1
	On(k, "10000000")
	err = testSuggestPeer(k, "<nil>", 1, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	// no gap (1 less), saturated proxbin, no callables -> do not want more
	On(k, "01000000", "00100001")
	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	// oversaturated proxbin, > do not want more
	On(k, "00100001")
	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	// reintroduce gap, disconnected peer callable
	Off(k, "01000000")
	err = testSuggestPeer(k, "01000000", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	// second time disconnected peer not callable
	// with reasonably set Interval
	err = testSuggestPeer(k, "<nil>", 1, true)
	if err != nil {
		t.Fatal(err.Error())
	}

	// on and off again, peer callable again
	On(k, "01000000")
	Off(k, "01000000")
	err = testSuggestPeer(k, "01000000", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	On(k, "01000000")
	// new closer peer appears, it is immediately wanted
	Register(k, "00010001")
	err = testSuggestPeer(k, "00010001", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	// PO1 disconnects
	On(k, "00010001")
	log.Info(k.String())
	Off(k, "01000000")
	log.Info(k.String())
	// second time, gap filling
	err = testSuggestPeer(k, "01000000", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	On(k, "01000000")
	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	k.MinBinSize = 2
	err = testSuggestPeer(k, "<nil>", 0, true)
	if err != nil {
		t.Fatal(err.Error())
	}

	Register(k, "01000001")
	err = testSuggestPeer(k, "01000001", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	On(k, "10000001")
	log.Trace(fmt.Sprintf("Kad:\n%v", k.String()))
	err = testSuggestPeer(k, "<nil>", 1, true)
	if err != nil {
		t.Fatal(err.Error())
	}

	On(k, "01000001")
	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	k.MinBinSize = 3
	Register(k, "10000010")
	err = testSuggestPeer(k, "10000010", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	On(k, "10000010")
	err = testSuggestPeer(k, "<nil>", 1, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	On(k, "01000010")
	err = testSuggestPeer(k, "<nil>", 2, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	On(k, "00100010")
	err = testSuggestPeer(k, "<nil>", 3, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	On(k, "00010010")
	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

}

// a node should stay in the address book if it's removed from the kademlia
func TestOffEffectingAddressBookNormalNode(t *testing.T) {
	k := newTestKademlia("00000000")
	// peer added to kademlia
	k.On(newTestKadPeer(k, "01000000", false))
	// peer should be in the address book
	if k.addrs.Size() != 1 {
		t.Fatal("known peer addresses should contain 1 entry")
	}
	// peer should be among live connections
	if k.conns.Size() != 1 {
		t.Fatal("live peers should contain 1 entry")
	}
	// remove peer from kademlia
	k.Off(newTestKadPeer(k, "01000000", false))
	// peer should be in the address book
	if k.addrs.Size() != 1 {
		t.Fatal("known peer addresses should contain 1 entry")
	}
	// peer should not be among live connections
	if k.conns.Size() != 0 {
		t.Fatal("live peers should contain 0 entry")
	}
}

// a light node should not be in the address book
func TestOffEffectingAddressBookLightNode(t *testing.T) {
	k := newTestKademlia("00000000")
	// light node peer added to kademlia
	k.On(newTestKadPeer(k, "01000000", true))
	// peer should not be in the address book
	if k.addrs.Size() != 0 {
		t.Fatal("known peer addresses should contain 0 entry")
	}
	// peer should be among live connections
	if k.conns.Size() != 1 {
		t.Fatal("live peers should contain 1 entry")
	}
	// remove peer from kademlia
	k.Off(newTestKadPeer(k, "01000000", true))
	// peer should not be in the address book
	if k.addrs.Size() != 0 {
		t.Fatal("known peer addresses should contain 0 entry")
	}
	// peer should not be among live connections
	if k.conns.Size() != 0 {
		t.Fatal("live peers should contain 0 entry")
	}
}

func TestSuggestPeerRetries(t *testing.T) {
	k := newTestKademlia("00000000")
	k.RetryInterval = int64(300 * time.Millisecond) // cycle
	k.MaxRetries = 50
	k.RetryExponent = 2
	sleep := func(n int) {
		ts := k.RetryInterval
		for i := 1; i < n; i++ {
			ts *= int64(k.RetryExponent)
		}
		time.Sleep(time.Duration(ts))
	}

	Register(k, "01000000")
	On(k, "00000001", "00000010")
	err := testSuggestPeer(k, "01000000", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	sleep(1)
	err = testSuggestPeer(k, "01000000", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	sleep(1)
	err = testSuggestPeer(k, "01000000", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	sleep(2)
	err = testSuggestPeer(k, "01000000", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

	sleep(2)
	err = testSuggestPeer(k, "<nil>", 0, false)
	if err != nil {
		t.Fatal(err.Error())
	}

}

func TestKademliaHiveString(t *testing.T) {
	k := newTestKademlia("00000000")
	On(k, "01000000", "00100000")
	Register(k, "10000000", "10000001")
	k.MaxProxDisplay = 8
	h := k.String()
	expH := "\n=========================================================================\nMon Feb 27 12:10:28 UTC 2017 KΛÐΞMLIΛ hive: queen's address: 000000\npopulation: 2 (4), MinProxBinSize: 2, MinBinSize: 1, MaxBinSize: 4\n============ DEPTH: 0 ==========================================\n000  0                              |  2 8100 (0) 8000 (0)\n001  1 4000                         |  1 4000 (0)\n002  1 2000                         |  1 2000 (0)\n003  0                              |  0\n004  0                              |  0\n005  0                              |  0\n006  0                              |  0\n007  0                              |  0\n========================================================================="
	if expH[104:] != h[104:] {
		t.Fatalf("incorrect hive output. expected %v, got %v", expH, h)
	}
}

// testKademliaCase constructs the kademlia and PeerPot map to validate
// the SuggestPeer and Healthy methods for provided hex-encoded addresses.
// Argument pivotAddr is the address of the kademlia.
func testKademliaCase(t *testing.T, pivotAddr string, addrs ...string) {
	addr := common.FromHex(pivotAddr)
	addrs = append(addrs, pivotAddr)

	k := NewKademlia(addr, NewKadParams())

	as := make([][]byte, len(addrs))
	for i, a := range addrs {
		as[i] = common.FromHex(a)
	}

	for _, a := range as {
		if bytes.Equal(a, addr) {
			continue
		}
		p := &BzzAddr{OAddr: a, UAddr: a}
		if err := k.Register(p); err != nil {
			t.Fatal(err)
		}
	}

	ppmap := NewPeerPotMap(2, as)

	pp := ppmap[pivotAddr]

	for {
		a, _, _ := k.SuggestPeer()
		if a == nil {
			break
		}
		k.On(NewPeer(&BzzPeer{BzzAddr: a}, k))
	}

	h := k.Healthy(pp)
	if !(h.GotNN && h.KnowNN && h.Full) {
		t.Fatalf("not healthy: %#v\n%v", h, k.String())
	}
}

/*
The regression test for the following invalid kademlia edge case.

Addresses used in this test are discovered as part of the simulation network
in higher level tests for streaming. They were generated randomly.

=========================================================================
Mon Apr  9 12:18:24 UTC 2018 KΛÐΞMLIΛ hive: queen's address: 7efef1
population: 9 (49), MinProxBinSize: 2, MinBinSize: 2, MaxBinSize: 4
000  2 d7e5 ec56                    | 18 ec56 (0) d7e5 (0) d9e0 (0) c735 (0)
001  2 18f1 3176                    | 14 18f1 (0) 10bb (0) 10d1 (0) 0421 (0)
002  2 52aa 47cd                    | 11 52aa (0) 51d9 (0) 5161 (0) 5130 (0)
003  1 646e                         |  1 646e (0)
004  0                              |  3 769c (0) 76d1 (0) 7656 (0)
============ DEPTH: 5 ==========================================
005  1 7a48                         |  1 7a48 (0)
006  1 7cbd                         |  1 7cbd (0)
007  0                              |  0
008  0                              |  0
009  0                              |  0
010  0                              |  0
011  0                              |  0
012  0                              |  0
013  0                              |  0
014  0                              |  0
015  0                              |  0
=========================================================================
*/
func TestKademliaCase1(t *testing.T) {
	testKademliaCase(t,
		"7efef1c41d77f843ad167be95f6660567eb8a4a59f39240000cce2e0d65baf8e",
		"ec560e6a4806aa37f147ee83687f3cf044d9953e61eedb8c34b6d50d9e2c5623",
		"646e9540c84f6a2f9cf6585d45a4c219573b4fd1b64a3c9a1386fc5cf98c0d4d",
		"18f13c5fba653781019025ab10e8d2fdc916d6448729268afe9e928ffcdbb8e8",
		"317617acf99b4ffddda8a736f8fc6c6ede0bf690bc23d834123823e6d03e2f69",
		"d7e52d9647a5d1c27a68c3ee65d543be3947ae4b68537b236d71ef9cb15fb9ab",
		"7a48f75f8ca60487ae42d6f92b785581b40b91f2da551ae73d5eae46640e02e8",
		"7cbd42350bde8e18ae5b955b5450f8e2cef3419f92fbf5598160c60fd78619f0",
		"52aa3ddec61f4d48dd505a2385403c634f6ad06ee1d99c5c90a5ba6006f9af9c",
		"47cdb6fa93eeb8bc91a417ff4e3b14a9c2ea85137462e2f575fae97f0c4be60d",
		"5161943eb42e2a03e715fe8afa1009ff5200060c870ead6ab103f63f26cb107f",
		"a38eaa1255f76bf883ca0830c86e8c4bb7eed259a8348aae9b03f21f90105bee",
		"b2522bdf1ab26f324e75424fdf6e493b47e8a27687fe76347607b344fc010075",
		"5bd7213964efb2580b91d02ac31ef126838abeba342f5dbdbe8d4d03562671a2",
		"0b531adb82744768b694d7f94f73d4f0c9de591266108daeb8c74066bfc9c9ca",
		"28501f59f70e888d399570145ed884353e017443c675aa12731ada7c87ea14f7",
		"4a45f1fc63e1a9cb9dfa44c98da2f3d20c2923e5d75ff60b2db9d1bdb0c54d51",
		"b193431ee35cd32de95805e7c1c749450c47486595aae7195ea6b6019a64fd61",
		"baebf36a1e35a7ed834e1c72faf44ba16c159fa47d3289ceb3ca35fefa8739b5",
		"a3659bd32e05fa36c8d20dbaaed8362bf1a8a7bd116aed62d8a43a2efbdf513f",
		"10d1b50881a4770ebebdd0a75589dabb931e6716747b0f65fd6b080b88c4fdb6",
		"3c76b8ca5c7ce6a03320646826213f59229626bf5b9d25da0c3ec0662dcb8ff3",
		"4d72a04ddeb851a68cd197ef9a92a3e2ff01fbbff638e64929dd1a9c2e150112",
		"c7353d320987956075b5bc1668571c7a36c800d5598fdc4832ec6569561e15d1",
		"d9e0c7c90878c20ab7639d5954756f54775404b3483407fe1b483635182734f6",
		"8fca67216b7939c0824fb06c5279901a94da41da9482b000f56df9906736ee75",
		"460719d7f7aa7d7438f0eaf30333484fa3bd0f233632c10ba89e6e46dd3604be",
		"0421d92c8a1c79ed5d01305a3d25aaf22a8f5f9e3d4bc80da47ee16ce20465fe",
		"3441d9d9c0f05820a1bb6459fc7d8ef266a1bd929e7db939a10f544efe8261ea",
		"ab198a66c293586746758468c610e5d3914d4ce629147eff6dd55a31f863ff8f",
		"3a1c8c16b0763f3d2c35269f454ff779d1255e954d2deaf6c040fb3f0bcdc945",
		"5561c0ea3b203e173b11e6aa9d0e621a4e10b1d8b178b8fe375220806557b823",
		"7656caccdc79cd8d7ce66d415cc96a718e8271c62fb35746bfc2b49faf3eebf3",
		"5130594fd54c1652cf2debde2c4204573ed76555d1e26757fe345b409af1544a",
		"76d1e83c71ca246d042e37ff1db181f2776265fbcfdc890ce230bfa617c9c2f0",
		"89580231962624c53968c1b0095b4a2732b2a2640a19fdd7d21fd064fcc0a5ef",
		"3d10d001fff44680c7417dd66ecf2e984f0baa20a9bbcea348583ba5ff210c4f",
		"43754e323f0f3a1155b1852bd6edd55da86b8c4cfe3df8b33733fca50fc202b8",
		"a9e7b1bb763ae6452ddcacd174993f82977d81a85206bb2ae3c842e2d8e19b4c",
		"10bb07da7bc7c7757f74149eff167d528a94a253cdc694a863f4d50054c00b6d",
		"28f0bc1b44658548d6e05dd16d4c2fe77f1da5d48b6774bc4263b045725d0c19",
		"835fbbf1d16ba7347b6e2fc552d6e982148d29c624ea20383850df3c810fa8fc",
		"8e236c56a77d7f46e41e80f7092b1a68cd8e92f6156365f41813ad1ca2c6b6f3",
		"51d9c857e9238c49186e37b4eccf17a82de3d5739f026f6043798ab531456e73",
		"bbddf7db6a682225301f36a9fd5b0d0121d2951753e1681295f3465352ad511f",
		"2690a910c33ee37b91eb6c4e0731d1d345e2dc3b46d308503a6e85bbc242c69e",
		"769ce86aa90b518b7ed382f9fdacfbed93574e18dc98fe6c342e4f9f409c2d5a",
		"ba3bebec689ce51d3e12776c45f80d25164fdfb694a8122d908081aaa2e7122c",
		"3a51f4146ea90a815d0d283d1ceb20b928d8b4d45875e892696986a3c0d8fb9b",
		"81968a2d8fb39114342ee1da85254ec51e0608d7f0f6997c2a8354c260a71009",
	)
}

/*
The regression test for the following invalid kademlia edge case.

Addresses used in this test are discovered as part of the simulation network
in higher level tests for streaming. They were generated randomly.

=========================================================================
Mon Apr  9 18:43:48 UTC 2018 KΛÐΞMLIΛ hive: queen's address: bc7f3b
population: 9 (49), MinProxBinSize: 2, MinBinSize: 2, MaxBinSize: 4
000  2 0f49 67ff                    | 28 0f49 (0) 0211 (0) 07b2 (0) 0703 (0)
001  2 e84b f3a4                    | 13 f3a4 (0) e84b (0) e58b (0) e60b (0)
002  1 8dba                         |  1 8dba (0)
003  2 a008 ad72                    |  2 ad72 (0) a008 (0)
004  0                              |  3 b61f (0) b27f (0) b027 (0)
============ DEPTH: 5 ==========================================
005  1 ba19                         |  1 ba19 (0)
006  0                              |  0
007  1 bdd6                         |  1 bdd6 (0)
008  0                              |  0
009  0                              |  0
010  0                              |  0
011  0                              |  0
012  0                              |  0
013  0                              |  0
014  0                              |  0
015  0                              |  0
=========================================================================
*/
func TestKademliaCase2(t *testing.T) {
	testKademliaCase(t,
		"bc7f3b6a4a7e3c91b100ca6680b6c06ff407972b88956324ca853295893e0237", "67ffb61d3aa27449d277016188f35f19e2321fbda5008c68cf6303faa080534f", "600cd54c842eadac1729c04abfc369bc244572ca76117105b9dd910283b82730", "d955a05409650de151218557425105a8aa2867bb6a0e0462fa1cf90abcf87ad6", "7a6b726de45abdf7bb3e5fd9fb0dc8932270ca4dedef92238c80c05bcdb570e3", "263e99424ebfdb652adb4e3dcd27d59e11bb7ae1c057b3ef6f390d0228006254", "ba195d1a53aafde68e661c64d39db8c2a73505bf336125c15c3560de3b48b7ed", "3458c762169937115f67cabc35a6c384ed70293a8aec37b077a6c1b8e02d510e", "4ef4dc2e28ac6efdba57e134ac24dd4e0be68b9d54f7006515eb9509105f700c", "2a8782b79b0c24b9714dfd2c8ff1932bebc08aa6520b4eaeaa59ff781238890c", "625d02e960506f4524e9cdeac85b33faf3ea437fceadbd478b62b78720cf24fc", "e051a36a8c8637f520ba259c9ed3fadaf740dadc6a04c3f0e21778ebd4cd6ac4", "e34bc014fa2504f707bb3d904872b56c2fa250bee3cb19a147a0418541f1bd90", "28036dc79add95799916893890add5d8972f3b95325a509d6ded3d448f4dc652", "1b013c407794fa2e4c955d8f51cbc6bd78588a174b6548246b291281304b5409", "34f71b68698e1534095ff23ee9c35bf64c7f12b8463e7c6f6b19c25cf03928b4", "c712c6e9bbb7076832972a95890e340b94ed735935c3c0bb788e61f011b59479", "a008d5becdcda4b9dbfdaafc3cec586cf61dcf2d4b713b6168fff02e3b9f0b08", "29de15555cdbebaab214009e416ee92f947dcec5dab9894129f50f1b17138f34", "5df9449f700bd4b5a23688b68b293f2e92fa6ca524c93bc6bb9936efba9d9ada", "3ab0168a5f87fedc6a39b53c628256ac87a98670d8691bbdaaecec22418d13a2", "1ee299b2d2a74a568494130e6869e66d57982d345c482a0e0eeb285ac219ae3b", "e0e0e3b860cea9b7a74cf1b0675cc632dc64e80a02f20bbc5e96e2e8bb670606", "dc1ba6f169b0fcdcca021dcebaf39fe5d4875e7e69b854fad65687c1d7719ec0", "d321f73e42fcfb1d3a303eddf018ca5dffdcfd5567cd5ec1212f045f6a07e47d", "070320c3da7b542e5ca8aaf6a0a53d2bb5113ed264ab1db2dceee17c729edcb1", "17d314d65fdd136b50d182d2c8f5edf16e7838c2be8cf2c00abe4b406dbcd1d8", "e60b99e0a06f7d2d99d84085f67cdf8cc22a9ae22c339365d80f90289834a2b4", "02115771e18932e1f67a45f11f5bf743c5dae97fbc477d34d35c996012420eac", "3102a40eb2e5060353dd19bf61eeec8782dd1bebfcb57f4c796912252b591827", "8dbaf231062f2dc7ddaba5f9c7761b0c21292be51bf8c2ef503f31d4a2f63f79", "b02787b713c83a9f9183216310f04251994e04c2763a9024731562e8978e7cc4", "b27fe6cd33989e10909ce794c4b0b88feae286b614a59d49a3444c1a7b51ea82", "07b2d2c94fdc6fd148fe23be2ed9eff54f5e12548f29ed8416e6860fc894466f", "e58bf9f451ef62ac44ff0a9bb0610ec0fd14d423235954f0d3695e83017cbfc4", "bdd600b91bb79d1ee0053b854de308cfaa7e2abce575ea6815a0a7b3449609c2", "0f49c93c1edc7999920b21977cedd51a763940dac32e319feb9c1df2da0f3071", "7cbf0297cd41acf655cd6f960d7aaf61479edb4189d5c001cbc730861f0deb41", "79265193778d87ad626a5f59397bc075872d7302a12634ce2451a767d0a82da2", "2fe7d705f7c370b9243dbaafe007d555ff58d218822fca49d347b12a0282457c", "e84bc0c83d05e55a0080eed41dda5a795da4b9313a4da697142e69a65834cbb3", "cc4d278bd9aa0e9fb3cd8d2e0d68fb791aab5de4b120b845c409effbed47a180", "1a2317a8646cd4b6d3c4aa4cc25f676533abb689cf180787db216880a1239ad8", "cbafd6568cf8e99076208e6b6843f5808a7087897c67aad0c54694669398f889", "7b7c8357255fc37b4dae0e1af61589035fd39ff627e0938c6b3da8b4e4ec5d23", "2b8d782c1f5bac46c922cf439f6aa79f91e9ba5ffc0020d58455188a2075b334", "b61f45af2306705740742e76197a119235584ced01ef3f7cf3d4370f6c557cd1", "2775612e7cdae2780bf494c370bdcbe69c55e4a1363b1dc79ea0135e61221cce", "f3a49bb22f40885e961299abfa697a7df690a79f067bf3a4847a3ad48d826c9f", "ad724ac218dc133c0aadf4618eae21fdd0c2f3787af279846b49e2b4f97ff167",
	)
}

/*
The regression test for the following invalid kademlia edge case.

Addresses used in this test are discovered as part of the simulation network
in higher level tests for streaming. They were generated randomly.

=========================================================================
Mon Apr  9 19:04:35 UTC 2018 KΛÐΞMLIΛ hive: queen's address: b4822e
population: 8 (49), MinProxBinSize: 2, MinBinSize: 2, MaxBinSize: 4
000  2 786c 774b                    | 29 774b (0) 786c (0) 7a79 (0) 7d2f (0)
001  2 d9de cf19                    | 10 cf19 (0) d9de (0) d2ff (0) d2a2 (0)
002  2 8ca1 8d74                    |  5 8d74 (0) 8ca1 (0) 9793 (0) 9f51 (0)
003  0                              |  0
004  0                              |  3 bfac (0) bcbb (0) bde9 (0)
005  0                              |  0
============ DEPTH: 6 ==========================================
006  1 b660                         |  1 b660 (0)
007  0                              |  0
008  1 b450                         |  1 b450 (0)
009  0                              |  0
010  0                              |  0
011  0                              |  0
012  0                              |  0
013  0                              |  0
014  0                              |  0
015  0                              |  0
=========================================================================
*/
func TestKademliaCase3(t *testing.T) {
	testKademliaCase(t,
		"b4822e874a01b94ac3a35c821e6db131e785c2fcbb3556e84b36102caf09b091", "2ecf54ea38d58f9cfc3862e54e5854a7c506fbc640e0b38e46d7d45a19794999", "442374092be50fc7392e8dd3f6fab3158ff7f14f26ff98060aed9b2eecf0b97d", "b450a4a67fcfa3b976cf023d8f1f15052b727f712198ce901630efe2f95db191", "9a7291638eb1c989a6dd6661a42c735b23ac6605b5d3e428aa5ffe650e892c85", "67f62eeab9804cfcac02b25ebeab9113d1b9d03dd5200b1c5a324cc0163e722f", "2e4a0e4b53bca4a9d7e2734150e9f579f29a255ade18a268461b20d026c9ee90", "30dd79c5fcdaa1b106f6960c45c9fde7c046aa3d931088d98c52ab759d0b2ac4", "97936fb5a581e59753c54fa5feec493714f2218245f61f97a62eafd4699433e4", "3a2899b6e129e3e193f6e2aefb82589c948c246d2ec1d4272af32ef3b2660f44", "f0e2a8aa88e67269e9952431ef12e5b29b7f41a1871fbfc38567fad95655d607", "7fa12b3f3c5f8383bfc644b958f72a486969733fa097d8952b3eb4f7b4f73192", "360c167aad5fc992656d6010ec45fdce5bcd492ad9608bc515e2be70d4e430c1", "fe21bc969b3d8e5a64a6484a829c1e04208f26f3cd4de6afcbc172a5bd17f1f1", "b660a1f40141d7ccd282fe5bd9838744119bd1cb3780498b5173578cc5ad308f", "44dcb3370e76680e2fba8cd986ad45ff0b77ca45680ee8d950e47922c4af6226", "8ca126923d17fccb689647307b89f38aa14e2a7b9ebcf3c1e31ccf3d2291a3bc", "f0ae19ae9ce6329327cbf42baf090e084c196b0877d8c7b69997e0123be23ef8", "d2a2a217385158e3e1e348883a14bc423e57daa12077e8c49797d16121ea0810", "f5467ccd85bb4ebe768527db520a210459969a5f1fae6e07b43f519799f0b224", "68be5fd9f9d142a5099e3609011fe3bab7bb992c595999e31e0b3d1668dfb3cf", "4d49a8a476e4934afc6b5c36db9bece3ed1804f20b952da5a21b2b0de766aa73", "ea7155745ef3fb2d099513887a2ba279333ced65c65facbd890ce58bd3fce772", "cf19f51f4e848053d289ac95a9138cdd23fc3077ae913cd58cda8cc7a521b2e1", "590b1cd41c7e6144e76b5cd515a3a4d0a4317624620a3f1685f43ae68bdcd890", "d2ffe0626b5f94a7e00fa0b506e7455a3d9399c15800db108d5e715ef5f6e346", "69630878c50a91f6c2edd23a706bfa0b50bd5661672a37d67bab38e6bca3b698", "445e9067079899bb5faafaca915ae6c0f6b1b730a5a628835dd827636f7feb1e", "6461c77491f1c4825958949f23c153e6e1759a5be53abbcee17c9da3867f3141", "23a235f4083771ccc207771daceda700b525a59ab586788d4f6892e69e34a6e2", "bde99f79ef41a81607ddcf92b9f95dcbc6c3537e91e8bf740e193dc73b19485e", "177957c0e5f0fbd12b88022a91768095d193830986caec8d888097d3ff4310b8", "bcbbdbaa4cdf8352422072f332e05111b732354a35c4d7c617ce1fc3b8b42a5a", "774b6717fdfb0d1629fb9d4c04a9ca40079ae2955d7f82e897477055ed017abb", "16443bf625be6d39ecaa6f114e5d2c1d47a64bfd3c13808d94b55b6b6acef2ee", "8d7495d9008066505ed00ce8198af82bfa5a6b4c08768b4c9fb3aa4eb0b0cca2", "15800849a53349508cb382959527f6c3cf1a46158ff1e6e2316b7dea7967e35f", "7a792f0f4a2b731781d1b244b2a57947f1a2e32900a1c0793449f9f7ae18a7b7", "5e517c2832c9deaa7df77c7bad4d20fd6eda2b7815e155e68bc48238fac1416f", "9f51a14f0019c72bd1d472706d8c80a18c1873c6a0663e754b60eae8094483d7", "7d2fabb565122521d22ba99fed9e5be6a458fbc93156d54db27d97a00b8c3a97", "786c9e412a7db4ec278891fa534caa9a1d1a028c631c6f3aeb9c4d96ad895c36", "3bd6341d40641c2632a5a0cd7a63553a04e251efd7195897a1d27e02a7a8bfde", "31efd1f5fb57b8cff0318d77a1a9e8d67e1d1c8d18ce90f99c3a240dff48cdc8", "d9de3e1156ce1380150948acbcfecd99c96e7f4b0bc97745f4681593d017f74f", "427a2201e09f9583cd990c03b81b58148c297d474a3b50f498d83b1c7a9414cd", "bfaca11596d3dec406a9fcf5d97536516dfe7f0e3b12078428a7e1700e25218a", "351c4770a097248a650008152d0cab5825d048bef770da7f3364f59d1e721bc0", "ee00f205d1486b2be7381d962bd2867263758e880529e4e2bfedfa613bbc0e71", "6aa3b6418d89e3348e4859c823ef4d6d7cd46aa7f7e77aba586c4214d760d8f8",
	)
}

/*
The regression test for the following invalid kademlia edge case.

Addresses used in this test are discovered as part of the simulation network
in higher level tests for streaming. They were generated randomly.

=========================================================================
Mon Apr  9 19:16:25 UTC 2018 KΛÐΞMLIΛ hive: queen's address: 9a90fe
population: 8 (49), MinProxBinSize: 2, MinBinSize: 2, MaxBinSize: 4
000  2 72ef 4e6c                    | 24 0b1e (0) 0d66 (0) 17f5 (0) 17e8 (0)
001  2 fc2b fa47                    | 13 fa47 (0) fc2b (0) fffd (0) ecef (0)
002  2 b847 afa8                    |  6 afa8 (0) ad77 (0) bb7c (0) b847 (0)
003  0                              |  0
004  0                              |  4 91fc (0) 957d (0) 9482 (0) 949a (0)
============ DEPTH: 5 ==========================================
005  1 9ccf                         |  1 9ccf (0)
006  0                              |  0
007  1 9bb2                         |  1 9bb2 (0)
008  0                              |  0
009  0                              |  0
010  0                              |  0
011  0                              |  0
012  0                              |  0
013  0                              |  0
014  0                              |  0
015  0                              |  0
=========================================================================
*/
func TestKademliaCase4(t *testing.T) {
	testKademliaCase(t,
		"9a90fe3506277244549064b8c3276abb06284a199d9063a97331947f2b7da7f4",
		"c19359eddef24b7be1a833b4475f212cd944263627a53f9ef4837d106c247730", "fc2b6fef99ef947f7e57c3df376891769e2a2fd83d2b8e634e0fc1e91eaa080c", "ecefc0e1a8ea7bb4b48c469e077401fce175dd75294255b96c4e54f6a2950a55", "bb7ce598efc056bba343cc2614aa3f67a575557561290b44c73a63f8f433f9f7", "55fbee6ca52dfd7f0be0db969ee8e524b654ab4f0cce7c05d83887d7d2a15460", "afa852b6b319998c6a283cc0c82d2f5b8e9410075d7700f3012761f1cfbd0f76", "36c370cfb63f2087971ba6e58d7585b04e16b8f0da335efb91554c2dd8fe191c", "6be41e029985edebc901fb77fc4fb65516b6d85086e2a98bfa3159c99391e585", "dd3cfc72ea553e7d2b28f0037a65646b30955b929d29ba4c40f4a2a811248e77", "da3a8f18e09c7b0ca235c4e33e1441a5188f1df023138bf207753ee63e768f7d", "de9e3ab4dc572d54a2d4b878329fd832bb51a149f4ce167316eeb177b61e7e01", "4e6c1ecde6ed917706257fe020a1d02d2e9d87fca4c85f0f7b132491008c5032", "72ef04b77a070e13463b3529dd312bcacfb7a12d20dc597f5ec3de0501e9b834", "3fef57186675d524ab8bb1f54ba8cb68610babca1247c0c46dbb60aed003c69d", "1d8e6b71f7a052865d6558d4ba44ad5fab7b908cc1badf5766822e1c20d0d823", "6be2f2b4ffa173014d4ec7df157d289744a2bda54bb876b264ccfa898a0da315", "b0ba3fff8643f9985c744327b0c4c869763509fd5da2de9a80a4a0a082021255", "9ccf40b9406ba2e6567101fb9b4e5334a9ec74263eff47267da266ba45e6c158", "d7347f02c180a448e60f73931845062ce00048750b584790278e9c93ef31ad81", "b68c6359a22b3bee6fecb8804311cfd816648ea31d530c9fb48e477e029d707a", "0d668a18ad7c2820214df6df95a6c855ce19fb1cb765f8ca620e45db76686d37", "3fbd2663bff65533246f1fabb9f38086854c6218aeb3dc9ac6ac73d4f0988f91", "949aa5719ca846052bfaa1b38c97b6eca3df3e24c0e0630042c6bccafbb4cdb5", "77b8a2b917bef5d54f3792183b014cca7798f713ff14fe0b2ac79b4c9f6f996d", "17e853cbd8dc00cba3cd9ffeb36f26a9f41a0eb92f80b62c2cda16771c935388", "5f682ed7a8cf2f98387c3def7c97f9f05ae39e39d393eeca3cf621268d6347f8", "ad77487eaf11fd8084ba4517a51766eb0e5b77dd3492dfa79aa3a2802fb29d20", "d247cfcacf9a8200ebaddf639f8c926ab0a001abe682f40df3785e80ed124e91", "195589442e11907eede1ee6524157f1125f68399f3170c835ff81c603b069f6c", "5b5ca0a67f3c54e7d3a6a862ef56168ec9ed1f4945e6c24de6d336b2be2e6f8c", "56430e4caa253015f1f998dce4a48a88af1953f68e94eca14f53074ae9c3e467", "0b1eed6a5bf612d1d8e08f5c546f3d12e838568fd3aa43ed4c537f10c65545d6", "7058db19a56dfff01988ac4a62e1310597f9c8d7ebde6890dadabf047d722d39", "b847380d6888ff7cd11402d086b19eccc40950b52c9d67e73cb4f8462f5df078", "df6c048419a2290ab546d527e9eeba349e7f7e1759bafe4adac507ce60ef9670", "91fc5b4b24fc3fbfea7f9a3d0f0437cb5733c0c2345d8bdffd7048d6e3b8a37b", "957d8ea51b37523952b6f5ae95462fcd4aed1483ef32cc80b69580aaeee03606", "efa82e4e91ad9ab781977400e9ac0bb9de7389aaedebdae979b73d1d3b8d72b0", "7400c9f3f3fc0cc6fe8cc37ab24b9771f44e9f78be913f73cd35fc4be030d6bd", "9bb28f4122d61f7bb56fe27ef706159fb802fef0f5de9dfa32c9c5b3183235f1", "40a8de6e98953498b806614532ea4abf8b99ad7f9719fb68203a6eae2efa5b2a", "412de0b218b8f7dcacc9205cd16ffb4eca5b838f46a2f4f9f534026061a47308", "17f56ecad51075080680ad9faa0fd8946b824d3296ddb20be07f9809fe8d1c5a", "fffd4e7ae885a41948a342b6647955a7ec8a8039039f510cff467ef597675457", "35e78e11b5ac46a29dd04ab0043136c3291f4ca56cb949ace33111ed56395463", "94824fc80230af82077c83bfc01dc9675b1f9d3d538b1e5f41c21ac753598691", "fa470ae314ca3fce493f21b423eef2a49522e09126f6f2326fa3c9cac0b344f7", "7078860b5b621b21ac7b95f9fc4739c8235ce5066a8b9bd7d938146a34fa88ec", "eea53560f0428bfd2eca4f86a5ce9dec5ff1309129a975d73465c1c9e9da71d1",
	)
}

/*
The regression test for the following invalid kademlia edge case.

Addresses used in this test are discovered as part of the simulation network
in higher level tests for streaming. They were generated randomly.

=========================================================================
Mon Apr  9 19:25:18 UTC 2018 KΛÐΞMLIΛ hive: queen's address: 5dd5c7
population: 13 (49), MinProxBinSize: 2, MinBinSize: 2, MaxBinSize: 4
000  2 e528 fad0                    | 22 fad0 (0) e528 (0) e3bb (0) ed13 (0)
001  3 3f30 18e0 1dd3               |  7 3f30 (0) 23db (0) 10b6 (0) 18e0 (0)
002  4 7c54 7804 61e4 60f9          | 10 61e4 (0) 60f9 (0) 636c (0) 7186 (0)
003  2 40ae 4bae                    |  5 4bae (0) 4d5c (0) 403a (0) 40ae (0)
004  0                              |  0
005  0                              |  3 5808 (0) 5a0e (0) 5bdb (0)
============ DEPTH: 6 ==========================================
006  2 5f14 5f61                    |  2 5f14 (0) 5f61 (0)
007  0                              |  0
008  0                              |  0
009  0                              |  0
010  0                              |  0
011  0                              |  0
012  0                              |  0
013  0                              |  0
014  0                              |  0
015  0                              |  0
=========================================================================
*/
func TestKademliaCase5(t *testing.T) {
	testKademliaCase(t,
		"5dd5c77dd9006a800478fcebb02d48d4036389e7d3c8f6a83b97dbad13f4c0a9",
		"78fafa0809929a1279ece089a51d12457c2d8416dff859aeb2ccc24bb50df5ec", "1dd39b1257e745f147cbbc3cadd609ccd6207c41056dbc4254bba5d2527d3ee5", "5f61dd66d4d94aec8fcc3ce0e7885c7edf30c43143fa730e2841c5d28e3cd081", "8aa8b0472cb351d967e575ad05c4b9f393e76c4b01ef4b3a54aac5283b78abc9", "4502f385152a915b438a6726ce3ea9342e7a6db91a23c2f6bee83a885ed7eb82", "718677a504249db47525e959ef1784bed167e1c46f1e0275b9c7b588e28a3758", "7c54c6ed1f8376323896ed3a4e048866410de189e9599dd89bf312ca4adb96b5", "18e03bd3378126c09e799a497150da5c24c895aedc84b6f0dbae41fc4bac081a", "23db76ac9e6e58d9f5395ca78252513a7b4118b4155f8462d3d5eec62486cadc", "40ae0e8f065e96c7adb7fa39505136401f01780481e678d718b7f6dbb2c906ec", "c1539998b8bae19d339d6bbb691f4e9daeb0e86847545229e80fe0dffe716e92", "ed139d73a2699e205574c08722ca9f030ad2d866c662f1112a276b91421c3cb9", "5bdb19584b7a36d09ca689422ef7e6bb681b8f2558a6b2177a8f7c812f631022", "636c9de7fe234ffc15d67a504c69702c719f626c17461d3f2918e924cd9d69e2", "de4455413ff9335c440d52458c6544191bd58a16d85f700c1de53b62773064ea", "de1963310849527acabc7885b6e345a56406a8f23e35e436b6d9725e69a79a83", "a80a50a467f561210a114cba6c7fb1489ed43a14d61a9edd70e2eb15c31f074d", "7804f12b8d8e6e4b375b242058242068a3809385e05df0e64973cde805cf729c", "60f9aa320c02c6f2e6370aa740cf7cea38083fa95fca8c99552cda52935c1520", "d8da963602390f6c002c00ce62a84b514edfce9ebde035b277a957264bb54d21", "8463d93256e026fe436abad44697152b9a56ac8e06a0583d318e9571b83d073c", "9a3f78fcefb9a05e40a23de55f6153d7a8b9d973ede43a380bf46bb3b3847de1", "e3bb576f4b3760b9ca6bff59326f4ebfc4a669d263fb7d67ab9797adea54ed13", "4d5cdbd6dcca5bdf819a0fe8d175dc55cc96f088d37462acd5ea14bc6296bdbe", "5a0ed28de7b5258c727cb85447071c74c00a5fbba9e6bc0393bc51944d04ab2a", "61e4ddb479c283c638f4edec24353b6cc7a3a13b930824aad016b0996ca93c47", "7e3610868acf714836cafaaa7b8c009a9ac6e3a6d443e5586cf661530a204ee2", "d74b244d4345d2c86e30a097105e4fb133d53c578320285132a952cdaa64416e", "cfeed57d0f935bfab89e3f630a7c97e0b1605f0724d85a008bbfb92cb47863a8", "580837af95055670e20d494978f60c7f1458dc4b9e389fc7aa4982b2aca3bce3", "df55c0c49e6c8a83d82dfa1c307d3bf6a20e18721c80d8ec4f1f68dc0a137ced", "5f149c51ce581ba32a285439a806c063ced01ccd4211cd024e6a615b8f216f95", "1eb76b00aeb127b10dd1b7cd4c3edeb4d812b5a658f0feb13e85c4d2b7c6fe06", "7a56ba7c3fb7cbfb5561a46a75d95d7722096b45771ec16e6fa7bbfab0b35dfe", "4bae85ad88c28470f0015246d530adc0cd1778bdd5145c3c6b538ee50c4e04bd", "afd1892e2a7145c99ec0ebe9ded0d3fec21089b277a68d47f45961ec5e39e7e0", "953138885d7b36b0ef79e46030f8e61fd7037fbe5ce9e0a94d728e8c8d7eab86", "de761613ef305e4f628cb6bf97d7b7dc69a9d513dc233630792de97bcda777a6", "3f3087280063d09504c084bbf7fdf984347a72b50d097fd5b086ffabb5b3fb4c", "7d18a94bb1ebfdef4d3e454d2db8cb772f30ca57920dd1e402184a9e598581a0", "a7d6fbdc9126d9f10d10617f49fb9f5474ffe1b229f76b7dd27cebba30eccb5d", "fad0246303618353d1387ec10c09ee991eb6180697ed3470ed9a6b377695203d", "1cf66e09ea51ee5c23df26615a9e7420be2ac8063f28f60a3bc86020e94fe6f3", "8269cdaa153da7c358b0b940791af74d7c651cd4d3f5ed13acfe6d0f2c539e7f", "90d52eaaa60e74bf1c79106113f2599471a902d7b1c39ac1f55b20604f453c09", "9788fd0c09190a3f3d0541f68073a2f44c2fcc45bb97558a7c319f36c25a75b3", "10b68fc44157ecfdae238ee6c1ce0333f906ad04d1a4cb1505c8e35c3c87fbb0", "e5284117fdf3757920475c786e0004cb00ba0932163659a89b36651a01e57394", "403ad51d911e113dcd5f9ff58c94f6d278886a2a4da64c3ceca2083282c92de3",
	)
}

func newTestDiscoveryPeer(addr pot.Address, kad *Kademlia) *Peer {
	rw := &p2p.MsgPipeRW{}
	p := p2p.NewPeer(enode.ID{}, "foo", []p2p.Cap{})
	pp := protocols.NewPeer(p, rw, &protocols.Spec{})
	bp := &BzzPeer{
		Peer: pp,
		BzzAddr: &BzzAddr{
			OAddr: addr.Bytes(),
			UAddr: []byte(fmt.Sprintf("%x", addr[:])),
		},
	}
	return NewPeer(bp, kad)
}