package ethchain import ( "fmt" "github.com/ethereum/eth-go/ethdb" "github.com/ethereum/eth-go/ethutil" "testing" ) func TestSnapshot(t *testing.T) { ethutil.ReadConfig("", ethutil.LogStd, "") db, _ := ethdb.NewMemDatabase() state := NewState(ethutil.NewTrie(db, "")) stateObject := NewContract([]byte("aa"), ethutil.Big1, ZeroHash256) state.UpdateStateObject(stateObject) stateObject.SetStorage(ethutil.Big("0"), ethutil.NewValue(42)) snapshot := state.Snapshot() stateObject = state.GetStateObject([]byte("aa")) stateObject.SetStorage(ethutil.Big("0"), ethutil.NewValue(43)) state.Revert(snapshot) stateObject = state.GetStateObject([]byte("aa")) if !stateObject.GetStorage(ethutil.Big("0")).Cmp(ethutil.NewValue(42)) { t.Error("Expected storage 0 to be 42") } }