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package vm
import (
"bytes"
"fmt"
"io/ioutil"
"log"
"math/big"
"os"
"testing"
"github.com/ethereum/go-ethereum/ethcrypto"
"github.com/ethereum/go-ethereum/ethlog"
"github.com/ethereum/go-ethereum/ethstate"
"github.com/ethereum/go-ethereum/ethtrie"
"github.com/ethereum/go-ethereum/ethutil"
)
type TestEnv struct {
}
func (self TestEnv) Origin() []byte { return nil }
func (self TestEnv) BlockNumber() *big.Int { return nil }
func (self TestEnv) BlockHash() []byte { return nil }
func (self TestEnv) PrevHash() []byte { return nil }
func (self TestEnv) Coinbase() []byte { return nil }
func (self TestEnv) Time() int64 { return 0 }
func (self TestEnv) Difficulty() *big.Int { return nil }
func (self TestEnv) Value() *big.Int { return nil }
// This is likely to fail if anything ever gets looked up in the state trie :-)
func (self TestEnv) State() *ethstate.State { return ethstate.New(ethtrie.New(nil, "")) }
const mutcode = `
var x = 0;
for i := 0; i < 10; i++ {
x = i
}
return x`
func setup(level ethlog.LogLevel, typ Type) (*Closure, VirtualMachine) {
code, err := ethutil.Compile(mutcode, true)
if err != nil {
log.Fatal(err)
}
// Pipe output to /dev/null
ethlog.AddLogSystem(ethlog.NewStdLogSystem(ioutil.Discard, log.LstdFlags, level))
ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "")
stateObject := ethstate.NewStateObject([]byte{'j', 'e', 'f', 'f'})
callerClosure := NewClosure(nil, stateObject, stateObject, code, big.NewInt(1000000), big.NewInt(0))
return callerClosure, New(TestEnv{}, typ)
}
func TestDebugVm(t *testing.T) {
closure, vm := setup(ethlog.DebugLevel, DebugVmTy)
ret, _, e := closure.Call(vm, nil)
if e != nil {
fmt.Println("error", e)
}
if ret[len(ret)-1] != 9 {
t.Errorf("Expected VM to return 9, got", ret, "instead.")
}
}
func TestVm(t *testing.T) {
closure, vm := setup(ethlog.DebugLevel, StandardVmTy)
ret, _, e := closure.Call(vm, nil)
if e != nil {
fmt.Println("error", e)
}
if ret[len(ret)-1] != 9 {
t.Errorf("Expected VM to return 9, got", ret, "instead.")
}
}
func BenchmarkDebugVm(b *testing.B) {
closure, vm := setup(ethlog.InfoLevel, DebugVmTy)
b.ResetTimer()
for i := 0; i < b.N; i++ {
closure.Call(vm, nil)
}
}
func BenchmarkVm(b *testing.B) {
closure, vm := setup(ethlog.InfoLevel, StandardVmTy)
b.ResetTimer()
for i := 0; i < b.N; i++ {
closure.Call(vm, nil)
}
}
func RunCode(mutCode string, typ Type) []byte {
code, err := ethutil.Compile(mutCode, true)
if err != nil {
log.Fatal(err)
}
ethlog.AddLogSystem(ethlog.NewStdLogSystem(os.Stdout, log.LstdFlags, ethlog.InfoLevel))
ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "")
stateObject := ethstate.NewStateObject([]byte{'j', 'e', 'f', 'f'})
closure := NewClosure(nil, stateObject, stateObject, code, big.NewInt(1000000), big.NewInt(0))
vm := New(TestEnv{}, typ)
ret, _, e := closure.Call(vm, nil)
if e != nil {
fmt.Println(e)
}
return ret
}
func TestBuildInSha256(t *testing.T) {
ret := RunCode(`
var in = 42
var out = 0
call(0x2, 0, 10000, in, out)
return out
`, DebugVmTy)
exp := ethcrypto.Sha256(ethutil.LeftPadBytes([]byte{42}, 32))
if bytes.Compare(ret, exp) != 0 {
t.Errorf("Expected %x, got %x", exp, ret)
}
}
func TestBuildInRipemd(t *testing.T) {
ret := RunCode(`
var in = 42
var out = 0
call(0x3, 0, 10000, in, out)
return out
`, DebugVmTy)
exp := ethutil.RightPadBytes(ethcrypto.Ripemd160(ethutil.LeftPadBytes([]byte{42}, 32)), 32)
if bytes.Compare(ret, exp) != 0 {
t.Errorf("Expected %x, got %x", exp, ret)
}
}
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