path: root/tests/state_test_util.go

// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library 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.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package tests

import (
    "bytes"
    "fmt"
    "io"
    "math/big"
    "strconv"
    "strings"
    "testing"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/state"
    "github.com/ethereum/go-ethereum/core/vm"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/logger/glog"
    "github.com/ethereum/go-ethereum/params"
)

func RunStateTestWithReader(chainConfig *params.ChainConfig, r io.Reader, skipTests []string) error {
    tests := make(map[string]VmTest)
    if err := readJson(r, &tests); err != nil {
        return err
    }

    if err := runStateTests(chainConfig, tests, skipTests); err != nil {
        return err
    }

    return nil
}

func RunStateTest(chainConfig *params.ChainConfig, p string, skipTests []string) error {
    tests := make(map[string]VmTest)
    if err := readJsonFile(p, &tests); err != nil {
        return err
    }

    if err := runStateTests(chainConfig, tests, skipTests); err != nil {
        return err
    }

    return nil

}

func BenchStateTest(chainConfig *params.ChainConfig, p string, conf bconf, b *testing.B) error {
    tests := make(map[string]VmTest)
    if err := readJsonFile(p, &tests); err != nil {
        return err
    }
    test, ok := tests[conf.name]
    if !ok {
        return fmt.Errorf("test not found: %s", conf.name)
    }

    // XXX Yeah, yeah...
    env := make(map[string]string)
    env["currentCoinbase"] = test.Env.CurrentCoinbase
    env["currentDifficulty"] = test.Env.CurrentDifficulty
    env["currentGasLimit"] = test.Env.CurrentGasLimit
    env["currentNumber"] = test.Env.CurrentNumber
    env["previousHash"] = test.Env.PreviousHash
    if n, ok := test.Env.CurrentTimestamp.(float64); ok {
        env["currentTimestamp"] = strconv.Itoa(int(n))
    } else {
        env["currentTimestamp"] = test.Env.CurrentTimestamp.(string)
    }

    b.ResetTimer()
    for i := 0; i < b.N; i++ {
        benchStateTest(chainConfig, test, env, b)
    }

    return nil
}

func benchStateTest(chainConfig *params.ChainConfig, test VmTest, env map[string]string, b *testing.B) {
    b.StopTimer()
    db, _ := ethdb.NewMemDatabase()
    statedb := makePreState(db, test.Pre)
    b.StartTimer()

    RunState(chainConfig, statedb, env, test.Exec)
}

func runStateTests(chainConfig *params.ChainConfig, tests map[string]VmTest, skipTests []string) error {
    skipTest := make(map[string]bool, len(skipTests))
    for _, name := range skipTests {
        skipTest[name] = true
    }

    for name, test := range tests {
        if skipTest[name] /*|| name != "EXP_Empty"*/ {
            glog.Infoln("Skipping state test", name)
            continue
        }

        //fmt.Println("StateTest:", name)
        if err := runStateTest(chainConfig, test); err != nil {
            return fmt.Errorf("%s: %s\n", name, err.Error())
        }

        //glog.Infoln("State test passed: ", name)
        //fmt.Println(string(statedb.Dump()))
    }
    return nil

}

func runStateTest(chainConfig *params.ChainConfig, test VmTest) error {
    db, _ := ethdb.NewMemDatabase()
    statedb := makePreState(db, test.Pre)

    // XXX Yeah, yeah...
    env := make(map[string]string)
    env["currentCoinbase"] = test.Env.CurrentCoinbase
    env["currentDifficulty"] = test.Env.CurrentDifficulty
    env["currentGasLimit"] = test.Env.CurrentGasLimit
    env["currentNumber"] = test.Env.CurrentNumber
    env["previousHash"] = test.Env.PreviousHash
    if n, ok := test.Env.CurrentTimestamp.(float64); ok {
        env["currentTimestamp"] = strconv.Itoa(int(n))
    } else {
        env["currentTimestamp"] = test.Env.CurrentTimestamp.(string)
    }

    var (
        ret []byte
        // gas  *big.Int
        // err  error
        logs vm.Logs
    )

    ret, logs, _, _ = RunState(chainConfig, statedb, env, test.Transaction)

    // Compare expected and actual return
    var rexp []byte
    if strings.HasPrefix(test.Out, "#") {
        n, _ := strconv.Atoi(test.Out[1:])
        rexp = make([]byte, n)
    } else {
        rexp = common.FromHex(test.Out)
    }
    if bytes.Compare(rexp, ret) != 0 {
        return fmt.Errorf("return failed. Expected %x, got %x\n", rexp, ret)
    }

    // check post state
    for addr, account := range test.Post {
        obj := statedb.GetStateObject(common.HexToAddress(addr))
        if obj == nil {
            return fmt.Errorf("did not find expected post-state account: %s", addr)
        }

        if obj.Balance().Cmp(common.Big(account.Balance)) != 0 {
            return fmt.Errorf("(%x) balance failed. Expected: %v have: %v\n", obj.Address().Bytes()[:4], common.String2Big(account.Balance), obj.Balance())
        }

        if obj.Nonce() != common.String2Big(account.Nonce).Uint64() {
            return fmt.Errorf("(%x) nonce failed. Expected: %v have: %v\n", obj.Address().Bytes()[:4], account.Nonce, obj.Nonce())
        }

        for addr, value := range account.Storage {
            v := statedb.GetState(obj.Address(), common.HexToHash(addr))
            vexp := common.HexToHash(value)

            if v != vexp {
                return fmt.Errorf("storage failed:\n%x: %s:\nexpected: %x\nhave:     %x\n(%v %v)\n", obj.Address().Bytes(), addr, vexp, v, vexp.Big(), v.Big())
            }
        }
    }

    root, _ := statedb.Commit(false)
    if common.HexToHash(test.PostStateRoot) != root {
        return fmt.Errorf("Post state root error. Expected: %s have: %x", test.PostStateRoot, root)
    }

    // check logs
    if len(test.Logs) > 0 {
        if err := checkLogs(test.Logs, logs); err != nil {
            return err
        }
    }

    return nil
}

func RunState(chainConfig *params.ChainConfig, statedb *state.StateDB, env, tx map[string]string) ([]byte, vm.Logs, *big.Int, error) {
    environment, msg := NewEVMEnvironment(false, chainConfig, statedb, env, tx)
    // Set pre compiled contracts
    vm.Precompiled = vm.PrecompiledContracts()
    gaspool := new(core.GasPool).AddGas(common.Big(env["currentGasLimit"]))

    root, _ := statedb.Commit(false)
    statedb.Reset(root)

    snapshot := statedb.Snapshot()

    ret, gasUsed, err := core.ApplyMessage(environment, msg, gaspool)
    if core.IsNonceErr(err) || core.IsInvalidTxErr(err) || core.IsGasLimitErr(err) {
        statedb.RevertToSnapshot(snapshot)
    }
    statedb.Commit(chainConfig.IsEIP158(environment.Context.BlockNumber))

    return ret, statedb.Logs(), gasUsed, err
}