Add initial implementation of block tests

* Add blocktest cmd and support for block tests files in
  tests/BlockTests , the launched node does not connect to
  network, resets state with a genesis block from the test file
  and starts the RPC API

4 files changed, 377 insertions, 1 deletions

diff --git a/cmd/blocktest/flags.go b/cmd/blocktest/flags.go
new file mode 100644
index 000000000..c811e5b85
--- /dev/null
+++ b/cmd/blocktest/flags.go
@@ -0,0 +1,41 @@
+/*
+	This file is part of go-ethereum
+
+	go-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	go-ethereum 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 General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @authors
+ * 	Gustav Simonsson <gustav.simonsson@gmail.com>
+ */
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+)
+
+var (
+	TestFile string
+)
+
+func Init() {
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, "%s <testfile>\n", os.Args[0])
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+
+	TestFile = flag.Arg(0)
+}
diff --git a/cmd/blocktest/main.go b/cmd/blocktest/main.go
new file mode 100644
index 000000000..4a05b8bee
--- /dev/null
+++ b/cmd/blocktest/main.go
@@ -0,0 +1,320 @@
+/*
+	This file is part of go-ethereum
+
+	go-ethereum 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.
+
+	go-ethereum 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 General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @authors
+ * 	Gustav Simonsson <gustav.simonsson@gmail.com>
+ * @date 2015
+ *
+ */
+
+package main
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"math/big"
+	"path"
+	"runtime"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/ethereum/go-ethereum/cmd/utils"
+	types "github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/eth"
+	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/p2p"
+	"github.com/ethereum/go-ethereum/p2p/nat"
+	"github.com/ethereum/go-ethereum/rlp"
+)
+
+const (
+	ClientIdentifier = "Ethereum(G)"
+	Version          = "0.8.6"
+)
+
+type Account struct {
+	Balance string
+	Code    string
+	Nonce   string
+	Storage map[string]string
+}
+
+type BlockHeader struct {
+	Bloom            string
+	Coinbase         string
+	Difficulty       string
+	ExtraData        string
+	GasLimit         string
+	GasUsed          string
+	MixHash          string
+	Nonce            string
+	Number           string
+	ParentHash       string
+	ReceiptTrie      string
+	SeedHash         string
+	StateRoot        string
+	Timestamp        string
+	TransactionsTrie string
+	UncleHash        string
+}
+type Tx struct {
+	Data     string
+	GasLimit string
+	GasPrice string
+	Nonce    string
+	R        string
+	S        string
+	To       string
+	V        string
+	Value    string
+}
+
+type Block struct {
+	BlockHeader  BlockHeader
+	Rlp          string
+	Transactions []Tx
+	UncleHeaders []string
+}
+
+type Test struct {
+	Blocks             []Block
+	GenesisBlockHeader BlockHeader
+	Pre                map[string]Account
+}
+
+var (
+	Identifier       string
+	KeyRing          string
+	DiffTool         bool
+	DiffType         string
+	KeyStore         string
+	StartRpc         bool
+	StartWebSockets  bool
+	RpcListenAddress string
+	RpcPort          int
+	WsPort           int
+	OutboundPort     string
+	ShowGenesis      bool
+	AddPeer          string
+	MaxPeer          int
+	GenAddr          bool
+	BootNodes        string
+	NodeKey          *ecdsa.PrivateKey
+	NAT              nat.Interface
+	SecretFile       string
+	ExportDir        string
+	NonInteractive   bool
+	Datadir          string
+	LogFile          string
+	ConfigFile       string
+	DebugFile        string
+	LogLevel         int
+	LogFormat        string
+	Dump             bool
+	DumpHash         string
+	DumpNumber       int
+	VmType           int
+	ImportChain      string
+	SHH              bool
+	Dial             bool
+	PrintVersion     bool
+	MinerThreads     int
+)
+
+// flags specific to cli client
+var (
+	StartMining    bool
+	StartJsConsole bool
+	InputFile      string
+)
+
+func main() {
+	init_vars()
+
+	Init()
+
+	if len(TestFile) < 1 {
+		log.Fatal("Please specify test file")
+	}
+	blocks, err := loadBlocksFromTestFile(TestFile)
+	if err != nil {
+		panic(err)
+	}
+
+	runtime.GOMAXPROCS(runtime.NumCPU())
+
+	defer func() {
+		logger.Flush()
+	}()
+
+	utils.HandleInterrupt()
+
+	utils.InitConfig(VmType, ConfigFile, Datadir, "ethblocktest")
+
+	ethereum, err := eth.New(&eth.Config{
+		Name:         p2p.MakeName(ClientIdentifier, Version),
+		KeyStore:     KeyStore,
+		DataDir:      Datadir,
+		LogFile:      LogFile,
+		LogLevel:     LogLevel,
+		LogFormat:    LogFormat,
+		MaxPeers:     MaxPeer,
+		Port:         OutboundPort,
+		NAT:          NAT,
+		KeyRing:      KeyRing,
+		Shh:          true,
+		Dial:         Dial,
+		BootNodes:    BootNodes,
+		NodeKey:      NodeKey,
+		MinerThreads: MinerThreads,
+	})
+
+	utils.StartRpc(ethereum, RpcListenAddress, RpcPort)
+	utils.StartEthereum(ethereum)
+
+	ethereum.ChainManager().ResetWithGenesisBlock(blocks[0])
+
+	// fmt.Println("HURR: ", hex.EncodeToString(ethutil.Encode(blocks[0].RlpData())))
+
+	go ethereum.ChainManager().InsertChain(types.Blocks{blocks[1]})
+	fmt.Println("OK! ")
+	ethereum.WaitForShutdown()
+}
+
+func loadBlocksFromTestFile(filePath string) (blocks types.Blocks, err error) {
+	fileContent, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		return
+	}
+	bt := *new(map[string]Test)
+	err = json.Unmarshal(fileContent, &bt)
+	if err != nil {
+		return
+	}
+
+	// TODO: support multiple blocks; loop over all blocks
+	gbh := new(types.Header)
+
+	// Let's use slighlty different namings for the same things, because that's awesome.
+	gbh.ParentHash, err = hex_decode(bt["SimpleTx"].GenesisBlockHeader.ParentHash)
+	gbh.UncleHash, err = hex_decode(bt["SimpleTx"].GenesisBlockHeader.UncleHash)
+	gbh.Coinbase, err = hex_decode(bt["SimpleTx"].GenesisBlockHeader.Coinbase)
+	gbh.Root, err = hex_decode(bt["SimpleTx"].GenesisBlockHeader.StateRoot)
+	gbh.TxHash, err = hex_decode(bt["SimpleTx"].GenesisBlockHeader.TransactionsTrie)
+	gbh.ReceiptHash, err = hex_decode(bt["SimpleTx"].GenesisBlockHeader.ReceiptTrie)
+	gbh.Bloom, err = hex_decode(bt["SimpleTx"].GenesisBlockHeader.Bloom)
+
+	gbh.MixDigest, err = hex_decode(bt["SimpleTx"].GenesisBlockHeader.MixHash)
+	gbh.SeedHash, err = hex_decode(bt["SimpleTx"].GenesisBlockHeader.SeedHash)
+
+	d, _ := new(big.Int).SetString(bt["SimpleTx"].GenesisBlockHeader.Difficulty, 10)
+	gbh.Difficulty = d
+
+	n, _ := new(big.Int).SetString(bt["SimpleTx"].GenesisBlockHeader.Number, 10)
+	gbh.Number = n
+
+	gl, _ := new(big.Int).SetString(bt["SimpleTx"].GenesisBlockHeader.GasLimit, 10)
+	gbh.GasLimit = gl
+
+	gu, _ := new(big.Int).SetString(bt["SimpleTx"].GenesisBlockHeader.GasUsed, 10)
+	gbh.GasUsed = gu
+
+	ts, _ := new(big.Int).SetString(bt["SimpleTx"].GenesisBlockHeader.Timestamp, 0)
+	gbh.Time = ts.Uint64()
+
+	extra, err := hex_decode(bt["SimpleTx"].GenesisBlockHeader.ExtraData)
+	gbh.Extra = string(extra) // TODO: change ExtraData to byte array
+
+	nonce, _ := hex_decode(bt["SimpleTx"].GenesisBlockHeader.Nonce)
+	gbh.Nonce = nonce
+
+	if err != nil {
+		return
+	}
+
+	gb := types.NewBlockWithHeader(gbh)
+	gb.Reward = new(big.Int)
+
+	testBlock := new(types.Block)
+
+	rlpBytes, err := hex_decode(bt["SimpleTx"].Blocks[0].Rlp)
+	err = rlp.Decode(bytes.NewReader(rlpBytes), &testBlock)
+	if err != nil {
+		return
+	}
+
+	blocks = types.Blocks{
+		gb,
+		testBlock,
+	}
+
+	return
+}
+
+func init_vars() {
+	VmType = 0
+	Identifier = ""
+	KeyRing = ""
+	KeyStore = "db"
+	RpcListenAddress = "127.0.0.1"
+	RpcPort = 8545
+	WsPort = 40404
+	StartRpc = true
+	StartWebSockets = false
+	NonInteractive = false
+	GenAddr = false
+	SecretFile = ""
+	ExportDir = ""
+	LogFile = ""
+
+	timeStr := strconv.FormatInt(time.Now().UnixNano(), 10)
+
+	Datadir = path.Join(ethutil.DefaultDataDir(), timeStr)
+	ConfigFile = path.Join(ethutil.DefaultDataDir(), timeStr, "conf.ini")
+
+	DebugFile = ""
+	LogLevel = 5
+	LogFormat = "std"
+	DiffTool = false
+	DiffType = "all"
+	ShowGenesis = false
+	ImportChain = ""
+	Dump = false
+	DumpHash = ""
+	DumpNumber = -1
+	StartMining = false
+	StartJsConsole = false
+	PrintVersion = false
+	MinerThreads = runtime.NumCPU()
+
+	Dial = false
+	OutboundPort = "30303"
+	BootNodes = ""
+	MaxPeer = 1
+
+}
+
+func hex_decode(s string) (res []byte, err error) {
+	return hex.DecodeString(strings.TrimPrefix(s, "0x"))
+}
diff --git a/core/chain_manager.go b/core/chain_manager.go
index f2382cf8d..17bfb1f3e 100644
--- a/core/chain_manager.go
+++ b/core/chain_manager.go
@@ -231,6 +231,21 @@ func (bc *ChainManager) Reset() {
 	bc.setTotalDifficulty(ethutil.Big("0"))
 }
 
+func (bc *ChainManager) ResetWithGenesisBlock(gb *types.Block) {
+	bc.mu.Lock()
+	defer bc.mu.Unlock()
+
+	for block := bc.currentBlock; block != nil; block = bc.GetBlock(block.Header().ParentHash) {
+		bc.db.Delete(block.Hash())
+	}
+
+	// Prepare the genesis block
+	bc.genesisBlock = gb
+	bc.write(bc.genesisBlock)
+	bc.insert(bc.genesisBlock)
+	bc.currentBlock = bc.genesisBlock
+}
+
 func (self *ChainManager) Export() []byte {
 	self.mu.RLock()
 	defer self.mu.RUnlock()
diff --git a/core/error.go b/core/error.go
index fb1eaed84..514cd076b 100644
--- a/core/error.go
+++ b/core/error.go
@@ -22,7 +22,7 @@ func (err *ParentErr) Error() string {
 }
 
 func ParentError(hash []byte) error {
-	return &ParentErr{Message: fmt.Sprintf("Block's parent unkown %x", hash)}
+	return &ParentErr{Message: fmt.Sprintf("Block's parent unknown %x", hash)}
 }
 
 func IsParentErr(err error) bool {