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state: test when contract creation fails, old storage values should re-appear (#9532) 

Because more tests won't hurt. :)

Add a test case for https://github.com/ethereum/py-evm/pull/1224#issuecomment-418775512 where if contract creation fails, old storage values (if ever existed) should re-appear.
This commit is contained in:
Wei Tang 2018-09-12 18:42:09 +08:00 committed by André Silva
parent 61f4534e2a
commit 018e2403b1
1 changed files with 27 additions and 0 deletions
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27
ethcore/src/state/mod.rs
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@ -2472,6 +2472,33 @@ mod tests {
assert_eq!(orig_root, state.root().clone());
}
#[test]
fn create_contract_fail_previous_storage() {
let mut state = get_temp_state();
let a: Address = 1000.into();
let k = H256::from(U256::from(0));
state.set_storage(&a, k, H256::from(U256::from(0xffff))).unwrap();
state.commit().unwrap();
state.clear();
let orig_root = state.root().clone();
assert_eq!(state.storage_at(&a, &k).unwrap(), H256::from(U256::from(0xffff)));
state.clear();
state.checkpoint(); // c1
state.new_contract(&a, U256::zero(), U256::zero()).unwrap();
state.checkpoint(); // c2
state.set_storage(&a, k, H256::from(U256::from(2))).unwrap();
state.revert_to_checkpoint(); // revert to c2
assert_eq!(state.storage_at(&a, &k).unwrap(), H256::from(U256::from(0)));
state.revert_to_checkpoint(); // revert to c1
assert_eq!(state.storage_at(&a, &k).unwrap(), H256::from(U256::from(0xffff)));
state.commit().unwrap();
assert_eq!(orig_root, state.root().clone());
}
#[test]
fn create_empty() {
let mut state = get_temp_state();