added eth tester

tests/ethtest/main.go

+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"io/ioutil"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/ethereum/eth-go/tests/helper"
+)
+
+type Account struct {
+	Balance string
+	Code    string
+	Nonce   string
+	Storage map[string]string
+}
+
+func StateObjectFromAccount(addr string, account Account) *ethstate.StateObject {
+	obj := ethstate.NewStateObject(ethutil.Hex2Bytes(addr))
+	obj.Balance = ethutil.Big(account.Balance)
+
+	if ethutil.IsHex(account.Code) {
+		account.Code = account.Code[2:]
+	}
+	obj.Code = ethutil.Hex2Bytes(account.Code)
+	obj.Nonce = ethutil.Big(account.Nonce).Uint64()
+
+	return obj
+}
+
+type VmTest struct {
+	Callcreates interface{}
+	Env         map[string]string
+	Exec        map[string]string
+	Gas         string
+	Out         string
+	Post        map[string]Account
+	Pre         map[string]Account
+}
+
+func RunVmTest(js string) (failed int) {
+	tests := make(map[string]VmTest)
+
+	data, _ := ioutil.ReadAll(strings.NewReader(js))
+	err := json.Unmarshal(data, &tests)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	for name, test := range tests {
+		state := ethstate.New(helper.NewTrie())
+		for addr, account := range test.Pre {
+			obj := StateObjectFromAccount(addr, account)
+			state.SetStateObject(obj)
+		}
+
+		ret, gas, err := helper.RunVm(state, test.Env, test.Exec)
+		// When an error is returned it doesn't always mean the tests fails.
+		// Have to come up with some conditional failing mechanism.
+		if err != nil {
+			helper.Log.Infoln(err)
+		}
+
+		rexp := helper.FromHex(test.Out)
+		if bytes.Compare(rexp, ret) != 0 {
+			log.Printf("%s's return failed. Expected %x, got %x\n", name, rexp, ret)
+			failed = 1
+		}
+
+		gexp := ethutil.Big(test.Gas)
+		if gexp.Cmp(gas) != 0 {
+			log.Printf("%s's gas failed. Expected %v, got %v\n", name, gexp, gas)
+			failed = 1
+		}
+
+		for addr, account := range test.Post {
+			obj := state.GetStateObject(helper.FromHex(addr))
+			for addr, value := range account.Storage {
+				v := obj.GetState(helper.FromHex(addr)).Bytes()
+				vexp := helper.FromHex(value)
+
+				if bytes.Compare(v, vexp) != 0 {
+					log.Printf("%s's : (%x: %s) storage failed. Expected %x, got %x (%v %v)\n", name, obj.Address()[0:4], addr, vexp, v, ethutil.BigD(vexp), ethutil.BigD(v))
+					failed = 1
+				}
+			}
+		}
+	}
+
+	return
+}
+
+func main() {
+	if len(os.Args) == 1 {
+		log.Fatalln("no json supplied")
+	}
+
+	os.Exit(RunVmTest(os.Args[1]))
+}