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// Copyright 2019 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 localstore
import (
"bytes"
"context"
"fmt"
"sync"
"testing"
"time"
"github.com/ethereum/go-ethereum/swarm/storage"
)
// TestDB_SubscribePush uploads some chunks before and after
// push syncing subscription is created and validates if
// all addresses are received in the right order.
func TestDB_SubscribePush(t *testing.T) {
db, cleanupFunc := newTestDB(t, nil)
defer cleanupFunc()
uploader := db.NewPutter(ModePutUpload)
chunks := make([]storage.Chunk, 0)
var chunksMu sync.Mutex
uploadRandomChunks := func(count int) {
for i := 0; i < count; i++ {
chunk := generateRandomChunk()
err := uploader.Put(chunk)
if err != nil {
t.Fatal(err)
}
chunksMu.Lock()
chunks = append(chunks, chunk)
chunksMu.Unlock()
}
}
// prepopulate database with some chunks
// before the subscription
uploadRandomChunks(10)
// set a timeout on subscription
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
// collect all errors from validating addresses, even nil ones
// to validate the number of addresses received by the subscription
errChan := make(chan error)
ch, stop := db.SubscribePush(ctx)
defer stop()
// receive and validate addresses from the subscription
go func() {
var i int // address index
for {
select {
case got, ok := <-ch:
if !ok {
return
}
chunksMu.Lock()
want := chunks[i]
chunksMu.Unlock()
var err error
if !bytes.Equal(got.Data(), want.Data()) {
err = fmt.Errorf("got chunk %v data %x, want %x", i, got.Data(), want.Data())
}
if !bytes.Equal(got.Address(), want.Address()) {
err = fmt.Errorf("got chunk %v address %s, want %s", i, got.Address().Hex(), want.Address().Hex())
}
i++
// send one and only one error per received address
errChan <- err
case <-ctx.Done():
return
}
}
}()
// upload some chunks just after subscribe
uploadRandomChunks(5)
time.Sleep(200 * time.Millisecond)
// upload some chunks after some short time
// to ensure that subscription will include them
// in a dynamic environment
uploadRandomChunks(3)
checkErrChan(ctx, t, errChan, len(chunks))
}
// TestDB_SubscribePush_multiple uploads chunks before and after
// multiple push syncing subscriptions are created and
// validates if all addresses are received in the right order.
func TestDB_SubscribePush_multiple(t *testing.T) {
db, cleanupFunc := newTestDB(t, nil)
defer cleanupFunc()
uploader := db.NewPutter(ModePutUpload)
addrs := make([]storage.Address, 0)
var addrsMu sync.Mutex
uploadRandomChunks := func(count int) {
for i := 0; i < count; i++ {
chunk := generateRandomChunk()
err := uploader.Put(chunk)
if err != nil {
t.Fatal(err)
}
addrsMu.Lock()
addrs = append(addrs, chunk.Address())
addrsMu.Unlock()
}
}
// prepopulate database with some chunks
// before the subscription
uploadRandomChunks(10)
// set a timeout on subscription
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
// collect all errors from validating addresses, even nil ones
// to validate the number of addresses received by the subscription
errChan := make(chan error)
subsCount := 10
// start a number of subscriptions
// that all of them will write every addresses error to errChan
for j := 0; j < subsCount; j++ {
ch, stop := db.SubscribePush(ctx)
defer stop()
// receive and validate addresses from the subscription
go func(j int) {
var i int // address index
for {
select {
case got, ok := <-ch:
if !ok {
return
}
addrsMu.Lock()
want := addrs[i]
addrsMu.Unlock()
var err error
if !bytes.Equal(got.Address(), want) {
err = fmt.Errorf("got chunk %v address on subscription %v %s, want %s", i, j, got, want)
}
i++
// send one and only one error per received address
errChan <- err
case <-ctx.Done():
return
}
}
}(j)
}
// upload some chunks just after subscribe
uploadRandomChunks(5)
time.Sleep(200 * time.Millisecond)
// upload some chunks after some short time
// to ensure that subscription will include them
// in a dynamic environment
uploadRandomChunks(3)
// number of addresses received by all subscriptions
wantedChunksCount := len(addrs) * subsCount
checkErrChan(ctx, t, errChan, wantedChunksCount)
}
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