Moved ethvm => vm

vm/vm_test.go

@@ -0,0 +1,155 @@
+package vm
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"math/big"
+	"os"
+	"testing"
+
+	"github.com/ethereum/eth-go/ethcrypto"
+	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethtrie"
+	"github.com/ethereum/eth-go/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)
+	}
+}