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345 lines
8.3 KiB
345 lines
8.3 KiB
package core
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import (
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"fmt"
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"math/big"
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"os"
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"path"
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"runtime"
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"strconv"
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"testing"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/rlp"
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)
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func init() {
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runtime.GOMAXPROCS(runtime.NumCPU())
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}
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// Test fork of length N starting from block i
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func testFork(t *testing.T, bman *BlockProcessor, i, N int, f func(td1, td2 *big.Int)) {
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// switch databases to process the new chain
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db, err := ethdb.NewMemDatabase()
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if err != nil {
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t.Fatal("Failed to create db:", err)
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}
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// copy old chain up to i into new db with deterministic canonical
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bman2, err := newCanonical(i, db)
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if err != nil {
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t.Fatal("could not make new canonical in testFork", err)
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}
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// asert the bmans have the same block at i
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bi1 := bman.bc.GetBlockByNumber(uint64(i)).Hash()
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bi2 := bman2.bc.GetBlockByNumber(uint64(i)).Hash()
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if bi1 != bi2 {
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t.Fatal("chains do not have the same hash at height", i)
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}
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bman2.bc.SetProcessor(bman2)
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// extend the fork
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parent := bman2.bc.CurrentBlock()
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chainB := makeChain(bman2, parent, N, db, ForkSeed)
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err = bman2.bc.InsertChain(chainB)
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if err != nil {
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t.Fatal("Insert chain error for fork:", err)
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}
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tdpre := bman.bc.Td()
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// Test the fork's blocks on the original chain
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td, err := testChain(chainB, bman)
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if err != nil {
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t.Fatal("expected chainB not to give errors:", err)
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}
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// Compare difficulties
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f(tdpre, td)
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}
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func printChain(bc *ChainManager) {
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for i := bc.CurrentBlock().Number().Uint64(); i > 0; i-- {
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b := bc.GetBlockByNumber(uint64(i))
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fmt.Printf("\t%x\n", b.Hash())
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}
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}
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// process blocks against a chain
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func testChain(chainB types.Blocks, bman *BlockProcessor) (*big.Int, error) {
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td := new(big.Int)
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for _, block := range chainB {
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td2, err := bman.bc.processor.Process(block)
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if err != nil {
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if IsKnownBlockErr(err) {
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continue
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}
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return nil, err
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}
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block.Td = td2
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td = td2
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bman.bc.mu.Lock()
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{
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bman.bc.write(block)
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}
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bman.bc.mu.Unlock()
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}
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return td, nil
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}
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func loadChain(fn string, t *testing.T) (types.Blocks, error) {
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fh, err := os.OpenFile(path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "_data", fn), os.O_RDONLY, os.ModePerm)
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if err != nil {
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return nil, err
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}
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defer fh.Close()
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var chain types.Blocks
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if err := rlp.Decode(fh, &chain); err != nil {
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return nil, err
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}
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return chain, nil
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}
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func insertChain(done chan bool, chainMan *ChainManager, chain types.Blocks, t *testing.T) {
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err := chainMan.InsertChain(chain)
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if err != nil {
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fmt.Println(err)
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t.FailNow()
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}
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done <- true
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}
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func TestExtendCanonical(t *testing.T) {
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CanonicalLength := 5
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db, err := ethdb.NewMemDatabase()
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if err != nil {
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t.Fatal("Failed to create db:", err)
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}
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// make first chain starting from genesis
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bman, err := newCanonical(CanonicalLength, db)
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if err != nil {
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t.Fatal("Could not make new canonical chain:", err)
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}
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f := func(td1, td2 *big.Int) {
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if td2.Cmp(td1) <= 0 {
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t.Error("expected chainB to have higher difficulty. Got", td2, "expected more than", td1)
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}
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}
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// Start fork from current height (CanonicalLength)
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testFork(t, bman, CanonicalLength, 1, f)
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testFork(t, bman, CanonicalLength, 2, f)
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testFork(t, bman, CanonicalLength, 5, f)
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testFork(t, bman, CanonicalLength, 10, f)
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}
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func TestShorterFork(t *testing.T) {
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db, err := ethdb.NewMemDatabase()
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if err != nil {
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t.Fatal("Failed to create db:", err)
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}
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// make first chain starting from genesis
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bman, err := newCanonical(10, db)
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if err != nil {
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t.Fatal("Could not make new canonical chain:", err)
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}
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f := func(td1, td2 *big.Int) {
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if td2.Cmp(td1) >= 0 {
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t.Error("expected chainB to have lower difficulty. Got", td2, "expected less than", td1)
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}
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}
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// Sum of numbers must be less than 10
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// for this to be a shorter fork
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testFork(t, bman, 0, 3, f)
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testFork(t, bman, 0, 7, f)
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testFork(t, bman, 1, 1, f)
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testFork(t, bman, 1, 7, f)
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testFork(t, bman, 5, 3, f)
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testFork(t, bman, 5, 4, f)
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}
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func TestLongerFork(t *testing.T) {
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db, err := ethdb.NewMemDatabase()
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if err != nil {
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t.Fatal("Failed to create db:", err)
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}
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// make first chain starting from genesis
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bman, err := newCanonical(10, db)
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if err != nil {
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t.Fatal("Could not make new canonical chain:", err)
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}
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f := func(td1, td2 *big.Int) {
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if td2.Cmp(td1) <= 0 {
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t.Error("expected chainB to have higher difficulty. Got", td2, "expected more than", td1)
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}
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}
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// Sum of numbers must be greater than 10
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// for this to be a longer fork
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testFork(t, bman, 0, 11, f)
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testFork(t, bman, 0, 15, f)
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testFork(t, bman, 1, 10, f)
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testFork(t, bman, 1, 12, f)
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testFork(t, bman, 5, 6, f)
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testFork(t, bman, 5, 8, f)
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}
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func TestEqualFork(t *testing.T) {
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db, err := ethdb.NewMemDatabase()
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if err != nil {
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t.Fatal("Failed to create db:", err)
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}
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bman, err := newCanonical(10, db)
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if err != nil {
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t.Fatal("Could not make new canonical chain:", err)
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}
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f := func(td1, td2 *big.Int) {
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if td2.Cmp(td1) != 0 {
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t.Error("expected chainB to have equal difficulty. Got", td2, "expected ", td1)
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}
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}
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// Sum of numbers must be equal to 10
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// for this to be an equal fork
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testFork(t, bman, 0, 10, f)
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testFork(t, bman, 1, 9, f)
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testFork(t, bman, 2, 8, f)
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testFork(t, bman, 5, 5, f)
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testFork(t, bman, 6, 4, f)
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testFork(t, bman, 9, 1, f)
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}
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func TestBrokenChain(t *testing.T) {
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db, err := ethdb.NewMemDatabase()
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if err != nil {
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t.Fatal("Failed to create db:", err)
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}
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bman, err := newCanonical(10, db)
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if err != nil {
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t.Fatal("Could not make new canonical chain:", err)
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}
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db2, err := ethdb.NewMemDatabase()
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if err != nil {
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t.Fatal("Failed to create db:", err)
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}
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bman2, err := newCanonical(10, db2)
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if err != nil {
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t.Fatal("Could not make new canonical chain:", err)
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}
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bman2.bc.SetProcessor(bman2)
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parent := bman2.bc.CurrentBlock()
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chainB := makeChain(bman2, parent, 5, db2, ForkSeed)
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chainB = chainB[1:]
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_, err = testChain(chainB, bman)
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if err == nil {
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t.Error("expected broken chain to return error")
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}
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}
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func TestChainInsertions(t *testing.T) {
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t.Skip() // travil fails.
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db, _ := ethdb.NewMemDatabase()
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chain1, err := loadChain("valid1", t)
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if err != nil {
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fmt.Println(err)
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t.FailNow()
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}
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chain2, err := loadChain("valid2", t)
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if err != nil {
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fmt.Println(err)
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t.FailNow()
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}
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var eventMux event.TypeMux
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chainMan := NewChainManager(db, db, &eventMux)
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txPool := NewTxPool(&eventMux)
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blockMan := NewBlockProcessor(db, db, nil, txPool, chainMan, &eventMux)
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chainMan.SetProcessor(blockMan)
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const max = 2
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done := make(chan bool, max)
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go insertChain(done, chainMan, chain1, t)
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go insertChain(done, chainMan, chain2, t)
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for i := 0; i < max; i++ {
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<-done
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}
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if chain2[len(chain2)-1].Hash() != chainMan.CurrentBlock().Hash() {
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t.Error("chain2 is canonical and shouldn't be")
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}
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if chain1[len(chain1)-1].Hash() != chainMan.CurrentBlock().Hash() {
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t.Error("chain1 isn't canonical and should be")
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}
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}
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func TestChainMultipleInsertions(t *testing.T) {
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t.Skip() // travil fails.
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db, _ := ethdb.NewMemDatabase()
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const max = 4
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chains := make([]types.Blocks, max)
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var longest int
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for i := 0; i < max; i++ {
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var err error
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name := "valid" + strconv.Itoa(i+1)
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chains[i], err = loadChain(name, t)
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if len(chains[i]) >= len(chains[longest]) {
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longest = i
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}
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fmt.Println("loaded", name, "with a length of", len(chains[i]))
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if err != nil {
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fmt.Println(err)
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t.FailNow()
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}
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}
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var eventMux event.TypeMux
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chainMan := NewChainManager(db, db, &eventMux)
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txPool := NewTxPool(&eventMux)
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blockMan := NewBlockProcessor(db, db, nil, txPool, chainMan, &eventMux)
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chainMan.SetProcessor(blockMan)
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done := make(chan bool, max)
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for i, chain := range chains {
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// XXX the go routine would otherwise reference the same (chain[3]) variable and fail
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i := i
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chain := chain
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go func() {
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insertChain(done, chainMan, chain, t)
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fmt.Println(i, "done")
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}()
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}
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for i := 0; i < max; i++ {
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<-done
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}
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if chains[longest][len(chains[longest])-1].Hash() != chainMan.CurrentBlock().Hash() {
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t.Error("Invalid canonical chain")
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}
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}
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func TestGetAncestors(t *testing.T) {
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t.Skip() // travil fails.
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db, _ := ethdb.NewMemDatabase()
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var eventMux event.TypeMux
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chainMan := NewChainManager(db, db, &eventMux)
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chain, err := loadChain("valid1", t)
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if err != nil {
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fmt.Println(err)
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t.FailNow()
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}
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for _, block := range chain {
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chainMan.write(block)
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}
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ancestors := chainMan.GetAncestors(chain[len(chain)-1], 4)
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fmt.Println(ancestors)
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}
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