1 files changed, 66 insertions, 0 deletions
diff --git a/tests/helper/vm.go b/tests/helper/vm.go
new file mode 100644
index 000000000..49a0bfeae
--- /dev/null
+++ b/tests/helper/vm.go
@@ -0,0 +1,66 @@
+package helper
+
+import (
+	"fmt"
+	"math/big"
+
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethtrie"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/ethereum/eth-go/ethvm"
+)
+
+type Env struct {
+	state *ethstate.State
+
+	origin   []byte
+	parent   []byte
+	coinbase []byte
+
+	number     *big.Int
+	time       int64
+	difficulty *big.Int
+}
+
+func NewEnv(state *ethstate.State) *Env {
+	return &Env{
+		state: state,
+	}
+}
+
+func NewEnvFromMap(state *ethstate.State, envValues map[string]string, exeValues map[string]string) *Env {
+	env := NewEnv(state)
+
+	env.origin = ethutil.Hex2Bytes(exeValues["caller"])
+	env.parent = ethutil.Hex2Bytes(envValues["previousHash"])
+	env.coinbase = ethutil.Hex2Bytes(envValues["currentCoinbase"])
+	env.number = ethutil.Big(envValues["currentNumber"])
+	env.time = ethutil.Big(envValues["currentTime"]).Int64()
+
+	return env
+}
+
+func (self *Env) Origin() []byte        { return self.origin }
+func (self *Env) BlockNumber() *big.Int { return self.number }
+func (self *Env) PrevHash() []byte      { return self.parent }
+func (self *Env) Coinbase() []byte      { return self.coinbase }
+func (self *Env) Time() int64           { return self.time }
+func (self *Env) Difficulty() *big.Int  { return self.difficulty }
+func (self *Env) BlockHash() []byte     { return nil }
+
+// This is likely to fail if anything ever gets looked up in the state trie :-)
+func (self *Env) State() *ethstate.State { return ethstate.New(ethtrie.New(nil, "")) }
+
+func RunVm(state *ethstate.State, env, exec map[string]string) ([]byte, *big.Int) {
+	caller := state.NewStateObject(ethutil.Hex2Bytes(exec["caller"]))
+	callee := state.GetStateObject(ethutil.Hex2Bytes(exec["address"]))
+	closure := ethvm.NewClosure(nil, caller, callee, callee.Code, ethutil.Big(exec["gas"]), ethutil.Big(exec["gasPrice"]))
+
+	vm := ethvm.New(NewEnvFromMap(state, env, exec), ethvm.DebugVmTy)
+	ret, _, e := closure.Call(vm, nil)
+	if e != nil {
+		fmt.Println(e)
+	}
+
+	return ret, closure.Gas
+}