100 lines
2.6 KiB
Rust
100 lines
2.6 KiB
Rust
use util::*;
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use pod_state::*;
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use account_diff::*;
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#[derive(Debug,Clone,PartialEq,Eq)]
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/// TODO [Gav Wood] Please document me
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pub struct StateDiff (BTreeMap<Address, AccountDiff>);
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impl StateDiff {
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/// Calculate and return diff between `pre` state and `post` state.
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pub fn diff_pod(pre: &PodState, post: &PodState) -> StateDiff {
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StateDiff(pre.get().keys().merge(post.get().keys()).filter_map(|acc| AccountDiff::diff_pod(pre.get().get(acc), post.get().get(acc)).map(|d|(acc.clone(), d))).collect())
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}
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}
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impl fmt::Display for StateDiff {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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for (add, acc) in &self.0 {
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try!(write!(f, "{} {}: {}", acc.existance(), add, acc));
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}
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Ok(())
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}
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}
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#[cfg(test)]
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mod test {
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use common::*;
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use pod_state::*;
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use account_diff::*;
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use pod_account::*;
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use super::*;
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#[test]
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fn create_delete() {
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let a = PodState::from(map![ x!(1) => PodAccount::new(x!(69), x!(0), vec![], map![]) ]);
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assert_eq!(StateDiff::diff_pod(&a, &PodState::new()), StateDiff(map![
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x!(1) => AccountDiff{
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balance: Diff::Died(x!(69)),
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nonce: Diff::Died(x!(0)),
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code: Diff::Died(vec![]),
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storage: map![],
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}
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]));
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assert_eq!(StateDiff::diff_pod(&PodState::new(), &a), StateDiff(map![
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x!(1) => AccountDiff{
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balance: Diff::Born(x!(69)),
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nonce: Diff::Born(x!(0)),
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code: Diff::Born(vec![]),
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storage: map![],
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}
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]));
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}
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#[test]
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fn create_delete_with_unchanged() {
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let a = PodState::from(map![ x!(1) => PodAccount::new(x!(69), x!(0), vec![], map![]) ]);
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let b = PodState::from(map![
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x!(1) => PodAccount::new(x!(69), x!(0), vec![], map![]),
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x!(2) => PodAccount::new(x!(69), x!(0), vec![], map![])
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]);
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assert_eq!(StateDiff::diff_pod(&a, &b), StateDiff(map![
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x!(2) => AccountDiff{
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balance: Diff::Born(x!(69)),
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nonce: Diff::Born(x!(0)),
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code: Diff::Born(vec![]),
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storage: map![],
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}
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]));
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assert_eq!(StateDiff::diff_pod(&b, &a), StateDiff(map![
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x!(2) => AccountDiff{
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balance: Diff::Died(x!(69)),
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nonce: Diff::Died(x!(0)),
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code: Diff::Died(vec![]),
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storage: map![],
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}
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]));
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}
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#[test]
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fn change_with_unchanged() {
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let a = PodState::from(map![
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x!(1) => PodAccount::new(x!(69), x!(0), vec![], map![]),
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x!(2) => PodAccount::new(x!(69), x!(0), vec![], map![])
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]);
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let b = PodState::from(map![
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x!(1) => PodAccount::new(x!(69), x!(1), vec![], map![]),
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x!(2) => PodAccount::new(x!(69), x!(0), vec![], map![])
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]);
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assert_eq!(StateDiff::diff_pod(&a, &b), StateDiff(map![
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x!(1) => AccountDiff{
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balance: Diff::Same,
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nonce: Diff::Changed(x!(0), x!(1)),
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code: Diff::Same,
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storage: map![],
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}
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]));
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}
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}
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