155 lines
3.9 KiB
Go
155 lines
3.9 KiB
Go
package downloader
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import (
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"encoding/binary"
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"math/big"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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)
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var knownHash = common.Hash{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
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func createHashes(start, amount int) (hashes []common.Hash) {
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hashes = make([]common.Hash, amount+1)
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hashes[len(hashes)-1] = knownHash
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for i := range hashes[:len(hashes)-1] {
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binary.BigEndian.PutUint64(hashes[i][:8], uint64(i+2))
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}
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return
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}
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func createBlocksFromHashes(hashes []common.Hash) map[common.Hash]*types.Block {
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blocks := make(map[common.Hash]*types.Block)
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for i, hash := range hashes {
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header := &types.Header{Number: big.NewInt(int64(i))}
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blocks[hash] = types.NewBlockWithHeader(header)
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blocks[hash].HeaderHash = hash
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}
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return blocks
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}
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type downloadTester struct {
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downloader *Downloader
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hashes []common.Hash
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blocks map[common.Hash]*types.Block
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t *testing.T
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pcount int
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done chan bool
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insertedBlocks int
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}
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func newTester(t *testing.T, hashes []common.Hash, blocks map[common.Hash]*types.Block) *downloadTester {
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tester := &downloadTester{t: t, hashes: hashes, blocks: blocks, done: make(chan bool)}
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downloader := New(tester.hasBlock, tester.insertChain)
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tester.downloader = downloader
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return tester
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}
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func (dl *downloadTester) hasBlock(hash common.Hash) bool {
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if knownHash == hash {
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return true
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}
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return false
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}
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func (dl *downloadTester) insertChain(blocks types.Blocks) error {
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dl.insertedBlocks += len(blocks)
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return nil
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}
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func (dl *downloadTester) getHashes(hash common.Hash) error {
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dl.downloader.hashCh <- dl.hashes
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return nil
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}
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func (dl *downloadTester) getBlocks(id string) func([]common.Hash) error {
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return func(hashes []common.Hash) error {
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blocks := make([]*types.Block, len(hashes))
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for i, hash := range hashes {
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blocks[i] = dl.blocks[hash]
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}
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go dl.downloader.DeliverChunk(id, blocks)
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return nil
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}
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}
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func (dl *downloadTester) newPeer(id string, td *big.Int, hash common.Hash) {
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dl.pcount++
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dl.downloader.RegisterPeer(id, hash, dl.getHashes, dl.getBlocks(id))
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}
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func (dl *downloadTester) badBlocksPeer(id string, td *big.Int, hash common.Hash) {
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dl.pcount++
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// This bad peer never returns any blocks
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dl.downloader.RegisterPeer(id, hash, dl.getHashes, func([]common.Hash) error {
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return nil
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})
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}
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func TestDownload(t *testing.T) {
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glog.SetV(logger.Detail)
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glog.SetToStderr(true)
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minDesiredPeerCount = 4
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blockTtl = 1 * time.Second
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targetBlocks := 1000
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hashes := createHashes(0, targetBlocks)
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blocks := createBlocksFromHashes(hashes)
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tester := newTester(t, hashes, blocks)
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tester.newPeer("peer1", big.NewInt(10000), hashes[0])
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tester.newPeer("peer2", big.NewInt(0), common.Hash{})
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tester.badBlocksPeer("peer3", big.NewInt(0), common.Hash{})
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tester.badBlocksPeer("peer4", big.NewInt(0), common.Hash{})
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err := tester.downloader.Synchronise("peer1", hashes[0])
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if err != nil {
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t.Error("download error", err)
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}
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if tester.insertedBlocks != targetBlocks {
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t.Error("expected", targetBlocks, "have", tester.insertedBlocks)
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}
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}
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func TestMissing(t *testing.T) {
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glog.SetV(logger.Detail)
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glog.SetToStderr(true)
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targetBlocks := 1000
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hashes := createHashes(0, 1000)
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extraHashes := createHashes(1001, 1003)
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blocks := createBlocksFromHashes(append(extraHashes, hashes...))
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tester := newTester(t, hashes, blocks)
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tester.newPeer("peer1", big.NewInt(10000), hashes[len(hashes)-1])
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hashes = append(extraHashes, hashes[:len(hashes)-1]...)
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tester.newPeer("peer2", big.NewInt(0), common.Hash{})
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err := tester.downloader.Synchronise("peer1", hashes[0])
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if err != nil {
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t.Error("download error", err)
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}
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if tester.insertedBlocks != targetBlocks {
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t.Error("expected", targetBlocks, "have", tester.insertedBlocks)
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}
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}
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