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Avoid changing overlay committed layer. (#5839)

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* Avoid changing overlay committed layer.

* basic test

* Add some tx in the test.

* only update from backend value on missing entry in both layer.
deleted entry is replace by empty vec.

* test and review changes

* additional test and review change

* remove test on changing existing value, it does not always panic
depending on existing content

* Update primitives/state-machine/src/overlayed_changes.rs

* Update primitives/state-machine/src/overlayed_changes.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
This commit is contained in:
cheme
2020-04-30 13:59:21 +02:00
committed by GitHub
parent 71d7dc1dfc
commit c05ec630ff
4 changed files with 139 additions and 25 deletions
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substrate/primitives/state-machine/src/lib.rs
+92
View File
@@ -1060,6 +1060,98 @@ mod tests {
);
}
#[test]
fn append_storage_works() {
let reference_data = vec![
b"data1".to_vec(),
b"2".to_vec(),
b"D3".to_vec(),
b"d4".to_vec(),
];
let key = b"key".to_vec();
let mut state = new_in_mem::<BlakeTwo256>();
let backend = state.as_trie_backend().unwrap();
let mut overlay = OverlayedChanges::default();
let mut offchain_overlay = OffchainOverlayedChanges::default();
let mut cache = StorageTransactionCache::default();
{
let mut ext = Ext::new(
&mut overlay,
&mut offchain_overlay,
&mut cache,
backend,
changes_trie::disabled_state::<_, u64>(),
None,
);
ext.storage_append(key.clone(), reference_data[0].encode());
assert_eq!(
ext.storage(key.as_slice()),
Some(vec![reference_data[0].clone()].encode()),
);
}
overlay.commit_prospective();
{
let mut ext = Ext::new(
&mut overlay,
&mut offchain_overlay,
&mut cache,
backend,
changes_trie::disabled_state::<_, u64>(),
None,
);
for i in reference_data.iter().skip(1) {
ext.storage_append(key.clone(), i.encode());
}
assert_eq!(
ext.storage(key.as_slice()),
Some(reference_data.encode()),
);
}
overlay.discard_prospective();
{
let ext = Ext::new(
&mut overlay,
&mut offchain_overlay,
&mut cache,
backend,
changes_trie::disabled_state::<_, u64>(),
None,
);
assert_eq!(
ext.storage(key.as_slice()),
Some(vec![reference_data[0].clone()].encode()),
);
}
}
#[test]
fn remove_then_append() {
let key = b"key".to_vec();
let mut state = new_in_mem::<BlakeTwo256>();
let backend = state.as_trie_backend().unwrap();
let mut overlay = OverlayedChanges::default();
let mut offchain_overlay = OffchainOverlayedChanges::default();
let mut cache = StorageTransactionCache::default();
let mut ext = Ext::new(
&mut overlay,
&mut offchain_overlay,
&mut cache,
backend,
changes_trie::disabled_state::<_, u64>(),
None,
);
ext.clear_storage(key.as_slice());
ext.storage_append(key.clone(), b"Item".to_vec().encode());
assert_eq!(
ext.storage(key.as_slice()),
Some(vec![b"Item".to_vec()].encode()),
);
}
#[test]
fn prove_read_and_proof_check_works() {
let child_info = ChildInfo::new_default(b"sub1");