mirror of
https://github.com/btcsuite/btcd.git
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130 lines
3.1 KiB
Go
130 lines
3.1 KiB
Go
// Copyright (c) 2013-2014 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package blockchain_test
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import (
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"compress/bzip2"
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"encoding/binary"
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"io"
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"os"
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"path/filepath"
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"strings"
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"testing"
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"github.com/btcsuite/btcd/blockchain"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/btcsuite/btcd/wire"
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"github.com/btcsuite/btcutil"
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)
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// TestReorganization loads a set of test blocks which force a chain
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// reorganization to test the block chain handling code.
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// The test blocks were originally from a post on the bitcoin talk forums:
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// https://bitcointalk.org/index.php?topic=46370.msg577556#msg577556
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func TestReorganization(t *testing.T) {
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// Intentionally load the side chain blocks out of order to ensure
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// orphans are handled properly along with chain reorganization.
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testFiles := []string{
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"blk_0_to_4.dat.bz2",
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"blk_4A.dat.bz2",
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"blk_5A.dat.bz2",
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"blk_3A.dat.bz2",
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}
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var blocks []*btcutil.Block
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for _, file := range testFiles {
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blockTmp, err := loadBlocks(file)
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if err != nil {
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t.Errorf("Error loading file: %v\n", err)
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}
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blocks = append(blocks, blockTmp...)
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}
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t.Logf("Number of blocks: %v\n", len(blocks))
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// Create a new database and chain instance to run tests against.
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chain, teardownFunc, err := chainSetup("reorg", &chaincfg.MainNetParams)
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if err != nil {
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t.Errorf("Failed to setup chain instance: %v", err)
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return
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}
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defer teardownFunc()
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// Since we're not dealing with the real block chain set the coinbase
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// maturity to 1.
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chain.TstSetCoinbaseMaturity(1)
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expectedOrphans := map[int]struct{}{5: {}, 6: {}}
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for i := 1; i < len(blocks); i++ {
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_, isOrphan, err := chain.ProcessBlock(blocks[i], blockchain.BFNone)
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if err != nil {
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t.Errorf("ProcessBlock fail on block %v: %v\n", i, err)
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return
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}
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if _, ok := expectedOrphans[i]; !ok && isOrphan {
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t.Errorf("ProcessBlock incorrectly returned block %v "+
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"is an orphan\n", i)
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}
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}
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}
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// loadBlocks reads files containing bitcoin block data (gzipped but otherwise
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// in the format bitcoind writes) from disk and returns them as an array of
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// btcutil.Block. This is largely borrowed from the test code in btcdb.
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func loadBlocks(filename string) (blocks []*btcutil.Block, err error) {
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filename = filepath.Join("testdata/", filename)
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var network = wire.MainNet
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var dr io.Reader
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var fi io.ReadCloser
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fi, err = os.Open(filename)
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if err != nil {
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return
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}
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if strings.HasSuffix(filename, ".bz2") {
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dr = bzip2.NewReader(fi)
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} else {
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dr = fi
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}
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defer fi.Close()
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var block *btcutil.Block
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err = nil
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for height := int64(1); err == nil; height++ {
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var rintbuf uint32
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err = binary.Read(dr, binary.LittleEndian, &rintbuf)
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if err == io.EOF {
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// hit end of file at expected offset: no warning
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height--
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err = nil
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break
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}
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if err != nil {
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break
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}
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if rintbuf != uint32(network) {
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break
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}
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err = binary.Read(dr, binary.LittleEndian, &rintbuf)
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blocklen := rintbuf
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rbytes := make([]byte, blocklen)
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// read block
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dr.Read(rbytes)
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block, err = btcutil.NewBlockFromBytes(rbytes)
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if err != nil {
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return
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}
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blocks = append(blocks, block)
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}
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return
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}
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