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356 lines
8.7 KiB
356 lines
8.7 KiB
package pex
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import (
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"encoding/hex"
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"fmt"
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"io/ioutil"
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"math/rand"
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"os"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/tendermint/tendermint/p2p"
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cmn "github.com/tendermint/tmlibs/common"
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"github.com/tendermint/tmlibs/log"
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)
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func createTempFileName(prefix string) string {
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f, err := ioutil.TempFile("", prefix)
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if err != nil {
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panic(err)
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}
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fname := f.Name()
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err = f.Close()
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if err != nil {
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panic(err)
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}
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return fname
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}
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func deleteTempFile(fname string) {
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err := os.Remove(fname)
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if err != nil {
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panic(err)
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}
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}
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func TestAddrBookPickAddress(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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// 0 addresses
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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assert.Zero(t, book.Size())
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addr := book.PickAddress(50)
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assert.Nil(t, addr, "expected no address")
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randAddrs := randNetAddressPairs(t, 1)
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addrSrc := randAddrs[0]
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book.AddAddress(addrSrc.addr, addrSrc.src)
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// pick an address when we only have new address
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addr = book.PickAddress(0)
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assert.NotNil(t, addr, "expected an address")
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addr = book.PickAddress(50)
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assert.NotNil(t, addr, "expected an address")
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addr = book.PickAddress(100)
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assert.NotNil(t, addr, "expected an address")
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// pick an address when we only have old address
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book.MarkGood(addrSrc.addr)
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addr = book.PickAddress(0)
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assert.NotNil(t, addr, "expected an address")
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addr = book.PickAddress(50)
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assert.NotNil(t, addr, "expected an address")
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// in this case, nNew==0 but we biased 100% to new, so we return nil
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addr = book.PickAddress(100)
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assert.Nil(t, addr, "did not expected an address")
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}
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func TestAddrBookSaveLoad(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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// 0 addresses
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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book.saveToFile(fname)
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book = NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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book.loadFromFile(fname)
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assert.Zero(t, book.Size())
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// 100 addresses
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randAddrs := randNetAddressPairs(t, 100)
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for _, addrSrc := range randAddrs {
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book.AddAddress(addrSrc.addr, addrSrc.src)
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}
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assert.Equal(t, 100, book.Size())
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book.saveToFile(fname)
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book = NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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book.loadFromFile(fname)
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assert.Equal(t, 100, book.Size())
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}
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func TestAddrBookLookup(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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randAddrs := randNetAddressPairs(t, 100)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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for _, addrSrc := range randAddrs {
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addr := addrSrc.addr
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src := addrSrc.src
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book.AddAddress(addr, src)
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ka := book.addrLookup[addr.ID]
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assert.NotNil(t, ka, "Expected to find KnownAddress %v but wasn't there.", addr)
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if !(ka.Addr.Equals(addr) && ka.Src.Equals(src)) {
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t.Fatalf("KnownAddress doesn't match addr & src")
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}
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}
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}
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func TestAddrBookPromoteToOld(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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randAddrs := randNetAddressPairs(t, 100)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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for _, addrSrc := range randAddrs {
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book.AddAddress(addrSrc.addr, addrSrc.src)
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}
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// Attempt all addresses.
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for _, addrSrc := range randAddrs {
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book.MarkAttempt(addrSrc.addr)
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}
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// Promote half of them
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for i, addrSrc := range randAddrs {
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if i%2 == 0 {
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book.MarkGood(addrSrc.addr)
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}
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}
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// TODO: do more testing :)
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selection := book.GetSelection()
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t.Logf("selection: %v", selection)
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if len(selection) > book.Size() {
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t.Errorf("selection could not be bigger than the book")
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}
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selection = book.GetSelectionWithBias(30)
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t.Logf("selection: %v", selection)
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if len(selection) > book.Size() {
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t.Errorf("selection with bias could not be bigger than the book")
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}
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assert.Equal(t, book.Size(), 100, "expecting book size to be 100")
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}
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func TestAddrBookHandlesDuplicates(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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randAddrs := randNetAddressPairs(t, 100)
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differentSrc := randIPv4Address(t)
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for _, addrSrc := range randAddrs {
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book.AddAddress(addrSrc.addr, addrSrc.src)
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book.AddAddress(addrSrc.addr, addrSrc.src) // duplicate
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book.AddAddress(addrSrc.addr, differentSrc) // different src
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}
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assert.Equal(t, 100, book.Size())
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}
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type netAddressPair struct {
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addr *p2p.NetAddress
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src *p2p.NetAddress
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}
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func randNetAddressPairs(t *testing.T, n int) []netAddressPair {
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randAddrs := make([]netAddressPair, n)
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for i := 0; i < n; i++ {
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randAddrs[i] = netAddressPair{addr: randIPv4Address(t), src: randIPv4Address(t)}
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}
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return randAddrs
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}
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func randIPv4Address(t *testing.T) *p2p.NetAddress {
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for {
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ip := fmt.Sprintf("%v.%v.%v.%v",
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rand.Intn(254)+1,
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rand.Intn(255),
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rand.Intn(255),
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rand.Intn(255),
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)
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port := rand.Intn(65535-1) + 1
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id := p2p.ID(hex.EncodeToString(cmn.RandBytes(p2p.IDByteLength)))
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idAddr := p2p.IDAddressString(id, fmt.Sprintf("%v:%v", ip, port))
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addr, err := p2p.NewNetAddressString(idAddr)
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assert.Nil(t, err, "error generating rand network address")
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if addr.Routable() {
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return addr
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}
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}
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}
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func TestAddrBookRemoveAddress(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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addr := randIPv4Address(t)
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book.AddAddress(addr, addr)
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assert.Equal(t, 1, book.Size())
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book.RemoveAddress(addr)
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assert.Equal(t, 0, book.Size())
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nonExistingAddr := randIPv4Address(t)
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book.RemoveAddress(nonExistingAddr)
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assert.Equal(t, 0, book.Size())
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}
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func TestAddrBookGetSelection(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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// 1) empty book
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assert.Empty(t, book.GetSelection())
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// 2) add one address
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addr := randIPv4Address(t)
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book.AddAddress(addr, addr)
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assert.Equal(t, 1, len(book.GetSelection()))
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assert.Equal(t, addr, book.GetSelection()[0])
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// 3) add a bunch of addresses
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randAddrs := randNetAddressPairs(t, 100)
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for _, addrSrc := range randAddrs {
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book.AddAddress(addrSrc.addr, addrSrc.src)
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}
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// check there is no duplicates
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addrs := make(map[string]*p2p.NetAddress)
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selection := book.GetSelection()
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for _, addr := range selection {
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if dup, ok := addrs[addr.String()]; ok {
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t.Fatalf("selection %v contains duplicates %v", selection, dup)
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}
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addrs[addr.String()] = addr
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}
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if len(selection) > book.Size() {
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t.Errorf("selection %v could not be bigger than the book", selection)
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}
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}
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func TestAddrBookGetSelectionWithBias(t *testing.T) {
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const biasTowardsNewAddrs = 30
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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// 1) empty book
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selection := book.GetSelectionWithBias(biasTowardsNewAddrs)
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assert.Empty(t, selection)
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// 2) add one address
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addr := randIPv4Address(t)
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book.AddAddress(addr, addr)
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selection = book.GetSelectionWithBias(biasTowardsNewAddrs)
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assert.Equal(t, 1, len(selection))
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assert.Equal(t, addr, selection[0])
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// 3) add a bunch of addresses
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randAddrs := randNetAddressPairs(t, 100)
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for _, addrSrc := range randAddrs {
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book.AddAddress(addrSrc.addr, addrSrc.src)
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}
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// check there is no duplicates
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addrs := make(map[string]*p2p.NetAddress)
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selection = book.GetSelectionWithBias(biasTowardsNewAddrs)
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for _, addr := range selection {
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if dup, ok := addrs[addr.String()]; ok {
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t.Fatalf("selection %v contains duplicates %v", selection, dup)
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}
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addrs[addr.String()] = addr
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}
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if len(selection) > book.Size() {
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t.Fatalf("selection %v could not be bigger than the book", selection)
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}
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// 4) mark 80% of the addresses as good
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randAddrsLen := len(randAddrs)
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for i, addrSrc := range randAddrs {
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if int((float64(i)/float64(randAddrsLen))*100) >= 20 {
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book.MarkGood(addrSrc.addr)
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}
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}
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selection = book.GetSelectionWithBias(biasTowardsNewAddrs)
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// check that ~70% of addresses returned are good
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good := 0
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for _, addr := range selection {
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if book.IsGood(addr) {
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good++
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}
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}
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got, expected := int((float64(good)/float64(len(selection)))*100), (100 - biasTowardsNewAddrs)
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if got >= expected {
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t.Fatalf("expected more good peers (%% got: %d, %% expected: %d, number of good addrs: %d, total: %d)", got, expected, good, len(selection))
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}
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}
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func TestAddrBookHasAddress(t *testing.T) {
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fname := createTempFileName("addrbook_test")
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defer deleteTempFile(fname)
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book := NewAddrBook(fname, true)
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book.SetLogger(log.TestingLogger())
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addr := randIPv4Address(t)
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book.AddAddress(addr, addr)
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assert.True(t, book.HasAddress(addr))
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book.RemoveAddress(addr)
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assert.False(t, book.HasAddress(addr))
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}
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