Official Go implementation of the Ethereum protocol
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go-ethereum/swarm/shed/index_test.go

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21 KiB

// Copyright 2018 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 shed
import (
"bytes"
"encoding/binary"
"fmt"
"sort"
"testing"
"time"
"github.com/syndtr/goleveldb/leveldb"
)
// Index functions for the index that is used in tests in this file.
var retrievalIndexFuncs = IndexFuncs{
EncodeKey: func(fields Item) (key []byte, err error) {
return fields.Address, nil
},
DecodeKey: func(key []byte) (e Item, err error) {
e.Address = key
return e, nil
},
EncodeValue: func(fields Item) (value []byte, err error) {
b := make([]byte, 8)
binary.BigEndian.PutUint64(b, uint64(fields.StoreTimestamp))
value = append(b, fields.Data...)
return value, nil
},
DecodeValue: func(keyItem Item, value []byte) (e Item, err error) {
e.StoreTimestamp = int64(binary.BigEndian.Uint64(value[:8]))
e.Data = value[8:]
return e, nil
},
}
// TestIndex validates put, get, has and delete functions of the Index implementation.
func TestIndex(t *testing.T) {
db, cleanupFunc := newTestDB(t)
defer cleanupFunc()
index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
if err != nil {
t.Fatal(err)
}
t.Run("put", func(t *testing.T) {
want := Item{
Address: []byte("put-hash"),
Data: []byte("DATA"),
StoreTimestamp: time.Now().UTC().UnixNano(),
}
err := index.Put(want)
if err != nil {
t.Fatal(err)
}
got, err := index.Get(Item{
Address: want.Address,
})
if err != nil {
t.Fatal(err)
}
checkItem(t, got, want)
t.Run("overwrite", func(t *testing.T) {
want := Item{
Address: []byte("put-hash"),
Data: []byte("New DATA"),
StoreTimestamp: time.Now().UTC().UnixNano(),
}
err = index.Put(want)
if err != nil {
t.Fatal(err)
}
got, err := index.Get(Item{
Address: want.Address,
})
if err != nil {
t.Fatal(err)
}
checkItem(t, got, want)
})
})
t.Run("put in batch", func(t *testing.T) {
want := Item{
Address: []byte("put-in-batch-hash"),
Data: []byte("DATA"),
StoreTimestamp: time.Now().UTC().UnixNano(),
}
batch := new(leveldb.Batch)
index.PutInBatch(batch, want)
err := db.WriteBatch(batch)
if err != nil {
t.Fatal(err)
}
got, err := index.Get(Item{
Address: want.Address,
})
if err != nil {
t.Fatal(err)
}
checkItem(t, got, want)
t.Run("overwrite", func(t *testing.T) {
want := Item{
Address: []byte("put-in-batch-hash"),
Data: []byte("New DATA"),
StoreTimestamp: time.Now().UTC().UnixNano(),
}
batch := new(leveldb.Batch)
index.PutInBatch(batch, want)
db.WriteBatch(batch)
if err != nil {
t.Fatal(err)
}
got, err := index.Get(Item{
Address: want.Address,
})
if err != nil {
t.Fatal(err)
}
checkItem(t, got, want)
})
})
t.Run("put in batch twice", func(t *testing.T) {
// ensure that the last item of items with the same db keys
// is actually saved
batch := new(leveldb.Batch)
address := []byte("put-in-batch-twice-hash")
// put the first item
index.PutInBatch(batch, Item{
Address: address,
Data: []byte("DATA"),
StoreTimestamp: time.Now().UTC().UnixNano(),
})
want := Item{
Address: address,
Data: []byte("New DATA"),
StoreTimestamp: time.Now().UTC().UnixNano(),
}
// then put the item that will produce the same key
// but different value in the database
index.PutInBatch(batch, want)
db.WriteBatch(batch)
if err != nil {
t.Fatal(err)
}
got, err := index.Get(Item{
Address: address,
})
if err != nil {
t.Fatal(err)
}
checkItem(t, got, want)
})
t.Run("has", func(t *testing.T) {
want := Item{
Address: []byte("has-hash"),
Data: []byte("DATA"),
StoreTimestamp: time.Now().UTC().UnixNano(),
}
dontWant := Item{
Address: []byte("do-not-has-hash"),
Data: []byte("DATA"),
StoreTimestamp: time.Now().UTC().UnixNano(),
}
err := index.Put(want)
if err != nil {
t.Fatal(err)
}
has, err := index.Has(want)
if err != nil {
t.Fatal(err)
}
if !has {
t.Error("item is not found")
}
has, err = index.Has(dontWant)
if err != nil {
t.Fatal(err)
}
if has {
t.Error("unwanted item is found")
}
})
t.Run("delete", func(t *testing.T) {
want := Item{
Address: []byte("delete-hash"),
Data: []byte("DATA"),
StoreTimestamp: time.Now().UTC().UnixNano(),
}
err := index.Put(want)
if err != nil {
t.Fatal(err)
}
got, err := index.Get(Item{
Address: want.Address,
})
if err != nil {
t.Fatal(err)
}
checkItem(t, got, want)
err = index.Delete(Item{
Address: want.Address,
})
if err != nil {
t.Fatal(err)
}
wantErr := leveldb.ErrNotFound
got, err = index.Get(Item{
Address: want.Address,
})
if err != wantErr {
t.Fatalf("got error %v, want %v", err, wantErr)
}
})
t.Run("delete in batch", func(t *testing.T) {
want := Item{
Address: []byte("delete-in-batch-hash"),
Data: []byte("DATA"),
StoreTimestamp: time.Now().UTC().UnixNano(),
}
err := index.Put(want)
if err != nil {
t.Fatal(err)
}
got, err := index.Get(Item{
Address: want.Address,
})
if err != nil {
t.Fatal(err)
}
checkItem(t, got, want)
batch := new(leveldb.Batch)
index.DeleteInBatch(batch, Item{
Address: want.Address,
})
err = db.WriteBatch(batch)
if err != nil {
t.Fatal(err)
}
wantErr := leveldb.ErrNotFound
got, err = index.Get(Item{
Address: want.Address,
})
if err != wantErr {
t.Fatalf("got error %v, want %v", err, wantErr)
}
})
}
// TestIndex_Iterate validates index Iterate
// functions for correctness.
func TestIndex_Iterate(t *testing.T) {
db, cleanupFunc := newTestDB(t)
defer cleanupFunc()
index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
if err != nil {
t.Fatal(err)
}
items := []Item{
{
Address: []byte("iterate-hash-01"),
Data: []byte("data80"),
},
{
Address: []byte("iterate-hash-03"),
Data: []byte("data22"),
},
{
Address: []byte("iterate-hash-05"),
Data: []byte("data41"),
},
{
Address: []byte("iterate-hash-02"),
Data: []byte("data84"),
},
{
Address: []byte("iterate-hash-06"),
Data: []byte("data1"),
},
}
batch := new(leveldb.Batch)
for _, i := range items {
index.PutInBatch(batch, i)
}
err = db.WriteBatch(batch)
if err != nil {
t.Fatal(err)
}
item04 := Item{
Address: []byte("iterate-hash-04"),
Data: []byte("data0"),
}
err = index.Put(item04)
if err != nil {
t.Fatal(err)
}
items = append(items, item04)
sort.SliceStable(items, func(i, j int) bool {
return bytes.Compare(items[i].Address, items[j].Address) < 0
})
t.Run("all", func(t *testing.T) {
var i int
err := index.Iterate(func(item Item) (stop bool, err error) {
if i > len(items)-1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
want := items[i]
checkItem(t, item, want)
i++
return false, nil
}, nil)
if err != nil {
t.Fatal(err)
}
})
t.Run("start from", func(t *testing.T) {
startIndex := 2
i := startIndex
err := index.Iterate(func(item Item) (stop bool, err error) {
if i > len(items)-1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
want := items[i]
checkItem(t, item, want)
i++
return false, nil
}, &IterateOptions{
StartFrom: &items[startIndex],
})
if err != nil {
t.Fatal(err)
}
})
t.Run("skip start from", func(t *testing.T) {
startIndex := 2
i := startIndex + 1
err := index.Iterate(func(item Item) (stop bool, err error) {
if i > len(items)-1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
want := items[i]
checkItem(t, item, want)
i++
return false, nil
}, &IterateOptions{
StartFrom: &items[startIndex],
SkipStartFromItem: true,
})
if err != nil {
t.Fatal(err)
}
})
t.Run("stop", func(t *testing.T) {
var i int
stopIndex := 3
var count int
err := index.Iterate(func(item Item) (stop bool, err error) {
if i > len(items)-1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
want := items[i]
checkItem(t, item, want)
count++
if i == stopIndex {
return true, nil
}
i++
return false, nil
}, nil)
if err != nil {
t.Fatal(err)
}
wantItemsCount := stopIndex + 1
if count != wantItemsCount {
t.Errorf("got %v items, expected %v", count, wantItemsCount)
}
})
t.Run("no overflow", func(t *testing.T) {
secondIndex, err := db.NewIndex("second-index", retrievalIndexFuncs)
if err != nil {
t.Fatal(err)
}
secondItem := Item{
Address: []byte("iterate-hash-10"),
Data: []byte("data-second"),
}
err = secondIndex.Put(secondItem)
if err != nil {
t.Fatal(err)
}
var i int
err = index.Iterate(func(item Item) (stop bool, err error) {
if i > len(items)-1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
want := items[i]
checkItem(t, item, want)
i++
return false, nil
}, nil)
if err != nil {
t.Fatal(err)
}
i = 0
err = secondIndex.Iterate(func(item Item) (stop bool, err error) {
if i > 1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
checkItem(t, item, secondItem)
i++
return false, nil
}, nil)
if err != nil {
t.Fatal(err)
}
})
}
// TestIndex_Iterate_withPrefix validates index Iterate
// function for correctness.
func TestIndex_Iterate_withPrefix(t *testing.T) {
db, cleanupFunc := newTestDB(t)
defer cleanupFunc()
index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
if err != nil {
t.Fatal(err)
}
allItems := []Item{
{Address: []byte("want-hash-00"), Data: []byte("data80")},
{Address: []byte("skip-hash-01"), Data: []byte("data81")},
{Address: []byte("skip-hash-02"), Data: []byte("data82")},
{Address: []byte("skip-hash-03"), Data: []byte("data83")},
{Address: []byte("want-hash-04"), Data: []byte("data84")},
{Address: []byte("want-hash-05"), Data: []byte("data85")},
{Address: []byte("want-hash-06"), Data: []byte("data86")},
{Address: []byte("want-hash-07"), Data: []byte("data87")},
{Address: []byte("want-hash-08"), Data: []byte("data88")},
{Address: []byte("want-hash-09"), Data: []byte("data89")},
{Address: []byte("skip-hash-10"), Data: []byte("data90")},
}
batch := new(leveldb.Batch)
for _, i := range allItems {
index.PutInBatch(batch, i)
}
err = db.WriteBatch(batch)
if err != nil {
t.Fatal(err)
}
prefix := []byte("want")
items := make([]Item, 0)
for _, item := range allItems {
if bytes.HasPrefix(item.Address, prefix) {
items = append(items, item)
}
}
sort.SliceStable(items, func(i, j int) bool {
return bytes.Compare(items[i].Address, items[j].Address) < 0
})
t.Run("with prefix", func(t *testing.T) {
var i int
err := index.Iterate(func(item Item) (stop bool, err error) {
if i > len(items)-1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
want := items[i]
checkItem(t, item, want)
i++
return false, nil
}, &IterateOptions{
Prefix: prefix,
})
if err != nil {
t.Fatal(err)
}
if i != len(items) {
t.Errorf("got %v items, want %v", i, len(items))
}
})
t.Run("with prefix and start from", func(t *testing.T) {
startIndex := 2
var count int
i := startIndex
err := index.Iterate(func(item Item) (stop bool, err error) {
if i > len(items)-1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
want := items[i]
checkItem(t, item, want)
i++
count++
return false, nil
}, &IterateOptions{
StartFrom: &items[startIndex],
Prefix: prefix,
})
if err != nil {
t.Fatal(err)
}
wantCount := len(items) - startIndex
if count != wantCount {
t.Errorf("got %v items, want %v", count, wantCount)
}
})
t.Run("with prefix and skip start from", func(t *testing.T) {
startIndex := 2
var count int
i := startIndex + 1
err := index.Iterate(func(item Item) (stop bool, err error) {
if i > len(items)-1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
want := items[i]
checkItem(t, item, want)
i++
count++
return false, nil
}, &IterateOptions{
StartFrom: &items[startIndex],
SkipStartFromItem: true,
Prefix: prefix,
})
if err != nil {
t.Fatal(err)
}
wantCount := len(items) - startIndex - 1
if count != wantCount {
t.Errorf("got %v items, want %v", count, wantCount)
}
})
t.Run("stop", func(t *testing.T) {
var i int
stopIndex := 3
var count int
err := index.Iterate(func(item Item) (stop bool, err error) {
if i > len(items)-1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
want := items[i]
checkItem(t, item, want)
count++
if i == stopIndex {
return true, nil
}
i++
return false, nil
}, &IterateOptions{
Prefix: prefix,
})
if err != nil {
t.Fatal(err)
}
wantItemsCount := stopIndex + 1
if count != wantItemsCount {
t.Errorf("got %v items, expected %v", count, wantItemsCount)
}
})
t.Run("no overflow", func(t *testing.T) {
secondIndex, err := db.NewIndex("second-index", retrievalIndexFuncs)
if err != nil {
t.Fatal(err)
}
secondItem := Item{
Address: []byte("iterate-hash-10"),
Data: []byte("data-second"),
}
err = secondIndex.Put(secondItem)
if err != nil {
t.Fatal(err)
}
var i int
err = index.Iterate(func(item Item) (stop bool, err error) {
if i > len(items)-1 {
return true, fmt.Errorf("got unexpected index item: %#v", item)
}
want := items[i]
checkItem(t, item, want)
i++
return false, nil
}, &IterateOptions{
Prefix: prefix,
})
if err != nil {
t.Fatal(err)
}
if i != len(items) {
t.Errorf("got %v items, want %v", i, len(items))
}
})
}
// TestIndex_count tests if Index.Count and Index.CountFrom
// returns the correct number of items.
func TestIndex_count(t *testing.T) {
db, cleanupFunc := newTestDB(t)
defer cleanupFunc()
index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
if err != nil {
t.Fatal(err)
}
items := []Item{
{
Address: []byte("iterate-hash-01"),
Data: []byte("data80"),
},
{
Address: []byte("iterate-hash-02"),
Data: []byte("data84"),
},
{
Address: []byte("iterate-hash-03"),
Data: []byte("data22"),
},
{
Address: []byte("iterate-hash-04"),
Data: []byte("data41"),
},
{
Address: []byte("iterate-hash-05"),
Data: []byte("data1"),
},
}
batch := new(leveldb.Batch)
for _, i := range items {
index.PutInBatch(batch, i)
}
err = db.WriteBatch(batch)
if err != nil {
t.Fatal(err)
}
t.Run("Count", func(t *testing.T) {
got, err := index.Count()
if err != nil {
t.Fatal(err)
}
want := len(items)
if got != want {
t.Errorf("got %v items count, want %v", got, want)
}
})
t.Run("CountFrom", func(t *testing.T) {
got, err := index.CountFrom(Item{
Address: items[1].Address,
})
if err != nil {
t.Fatal(err)
}
want := len(items) - 1
if got != want {
t.Errorf("got %v items count, want %v", got, want)
}
})
// update the index with another item
t.Run("add item", func(t *testing.T) {
item04 := Item{
Address: []byte("iterate-hash-06"),
Data: []byte("data0"),
}
err = index.Put(item04)
if err != nil {
t.Fatal(err)
}
count := len(items) + 1
t.Run("Count", func(t *testing.T) {
got, err := index.Count()
if err != nil {
t.Fatal(err)
}
want := count
if got != want {
t.Errorf("got %v items count, want %v", got, want)
}
})
t.Run("CountFrom", func(t *testing.T) {
got, err := index.CountFrom(Item{
Address: items[1].Address,
})
if err != nil {
t.Fatal(err)
}
want := count - 1
if got != want {
t.Errorf("got %v items count, want %v", got, want)
}
})
})
// delete some items
t.Run("delete items", func(t *testing.T) {
deleteCount := 3
for _, item := range items[:deleteCount] {
err := index.Delete(item)
if err != nil {
t.Fatal(err)
}
}
count := len(items) + 1 - deleteCount
t.Run("Count", func(t *testing.T) {
got, err := index.Count()
if err != nil {
t.Fatal(err)
}
want := count
if got != want {
t.Errorf("got %v items count, want %v", got, want)
}
})
t.Run("CountFrom", func(t *testing.T) {
got, err := index.CountFrom(Item{
Address: items[deleteCount+1].Address,
})
if err != nil {
t.Fatal(err)
}
want := count - 1
if got != want {
t.Errorf("got %v items count, want %v", got, want)
}
})
})
}
// checkItem is a test helper function that compares if two Index items are the same.
func checkItem(t *testing.T, got, want Item) {
t.Helper()
if !bytes.Equal(got.Address, want.Address) {
t.Errorf("got hash %q, expected %q", string(got.Address), string(want.Address))
}
if !bytes.Equal(got.Data, want.Data) {
t.Errorf("got data %q, expected %q", string(got.Data), string(want.Data))
}
if got.StoreTimestamp != want.StoreTimestamp {
t.Errorf("got store timestamp %v, expected %v", got.StoreTimestamp, want.StoreTimestamp)
}
if got.AccessTimestamp != want.AccessTimestamp {
t.Errorf("got access timestamp %v, expected %v", got.AccessTimestamp, want.AccessTimestamp)
}
}
// TestIndex_firstAndLast validates that index First and Last methods
// are returning expected results based on the provided prefix.
func TestIndex_firstAndLast(t *testing.T) {
db, cleanupFunc := newTestDB(t)
defer cleanupFunc()
index, err := db.NewIndex("retrieval", retrievalIndexFuncs)
if err != nil {
t.Fatal(err)
}
addrs := [][]byte{
{0, 0, 0, 0, 0},
{0, 1},
{0, 1, 0, 0, 0},
{0, 1, 0, 0, 1},
{0, 1, 0, 0, 2},
{0, 2, 0, 0, 1},
{0, 4, 0, 0, 0},
{0, 10, 0, 0, 10},
{0, 10, 0, 0, 11},
{0, 10, 0, 0, 20},
{1, 32, 255, 0, 1},
{1, 32, 255, 0, 2},
{1, 32, 255, 0, 3},
{255, 255, 255, 255, 32},
{255, 255, 255, 255, 64},
{255, 255, 255, 255, 255},
}
// ensure that the addresses are sorted for
// validation of nil prefix
sort.Slice(addrs, func(i, j int) (less bool) {
return bytes.Compare(addrs[i], addrs[j]) == -1
})
batch := new(leveldb.Batch)
for _, addr := range addrs {
index.PutInBatch(batch, Item{
Address: addr,
})
}
err = db.WriteBatch(batch)
if err != nil {
t.Fatal(err)
}
for _, tc := range []struct {
prefix []byte
first []byte
last []byte
err error
}{
{
prefix: nil,
first: addrs[0],
last: addrs[len(addrs)-1],
},
{
prefix: []byte{0, 0},
first: []byte{0, 0, 0, 0, 0},
last: []byte{0, 0, 0, 0, 0},
},
{
prefix: []byte{0},
first: []byte{0, 0, 0, 0, 0},
last: []byte{0, 10, 0, 0, 20},
},
{
prefix: []byte{0, 1},
first: []byte{0, 1},
last: []byte{0, 1, 0, 0, 2},
},
{
prefix: []byte{0, 10},
first: []byte{0, 10, 0, 0, 10},
last: []byte{0, 10, 0, 0, 20},
},
{
prefix: []byte{1, 32, 255},
first: []byte{1, 32, 255, 0, 1},
last: []byte{1, 32, 255, 0, 3},
},
{
prefix: []byte{255},
first: []byte{255, 255, 255, 255, 32},
last: []byte{255, 255, 255, 255, 255},
},
{
prefix: []byte{255, 255, 255, 255, 255},
first: []byte{255, 255, 255, 255, 255},
last: []byte{255, 255, 255, 255, 255},
},
{
prefix: []byte{0, 3},
err: leveldb.ErrNotFound,
},
{
prefix: []byte{222},
err: leveldb.ErrNotFound,
},
} {
got, err := index.Last(tc.prefix)
if tc.err != err {
t.Errorf("got error %v for Last with prefix %v, want %v", err, tc.prefix, tc.err)
} else {
if !bytes.Equal(got.Address, tc.last) {
t.Errorf("got %v for Last with prefix %v, want %v", got.Address, tc.prefix, tc.last)
}
}
got, err = index.First(tc.prefix)
if tc.err != err {
t.Errorf("got error %v for First with prefix %v, want %v", err, tc.prefix, tc.err)
} else {
if !bytes.Equal(got.Address, tc.first) {
t.Errorf("got %v for First with prefix %v, want %v", got.Address, tc.prefix, tc.first)
}
}
}
}
// TestIncByteSlice validates returned values of incByteSlice function.
func TestIncByteSlice(t *testing.T) {
for _, tc := range []struct {
b []byte
want []byte
}{
{b: nil, want: nil},
{b: []byte{}, want: nil},
{b: []byte{0}, want: []byte{1}},
{b: []byte{42}, want: []byte{43}},
{b: []byte{255}, want: nil},
{b: []byte{0, 0}, want: []byte{0, 1}},
{b: []byte{1, 0}, want: []byte{1, 1}},
{b: []byte{1, 255}, want: []byte{2, 0}},
{b: []byte{255, 255}, want: nil},
{b: []byte{32, 0, 255}, want: []byte{32, 1, 0}},
} {
got := incByteSlice(tc.b)
if !bytes.Equal(got, tc.want) {
t.Errorf("got %v, want %v", got, tc.want)
}
}
}