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Another state machine test (#5875)

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* another state machine test

* add more asserts and remove 'remov_then_append'
This commit is contained in:
Nikolay Volf
2020-05-03 16:30:42 +03:00
committed by GitHub
parent 92d0c0b769
commit 34d5db0de6
1 changed files with 89 additions and 19 deletions
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substrate/primitives/state-machine/src/lib.rs
+89 -19
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@@ -1127,29 +1127,99 @@ mod tests {
}
#[test]
fn remove_then_append() {
let key = b"key".to_vec();
fn remove_with_append_then_rollback_appended_then_append_again() {
#[derive(codec::Encode, codec::Decode)]
enum Item { InitializationItem, DiscardedItem, CommitedItem }
let key = b"events".to_vec();
let mut cache = StorageTransactionCache::default();
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,
);
let mut overlay = OverlayedChanges::default();
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()),
);
// For example, block initialization with event.
{
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(), Item::InitializationItem.encode());
}
overlay.commit_prospective();
// For example, first transaction resulted in panic during block building
{
let mut 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![Item::InitializationItem].encode()),
);
ext.storage_append(key.clone(), Item::DiscardedItem.encode());
assert_eq!(
ext.storage(key.as_slice()),
Some(vec![Item::InitializationItem, Item::DiscardedItem].encode()),
);
}
overlay.discard_prospective();
// Then we apply next transaction which is valid this time.
{
let mut 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![Item::InitializationItem].encode()),
);
ext.storage_append(key.clone(), Item::CommitedItem.encode());
assert_eq!(
ext.storage(key.as_slice()),
Some(vec![Item::InitializationItem, Item::CommitedItem].encode()),
);
}
overlay.commit_prospective();
// Then only initlaization item and second (commited) item should persist.
{
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![Item::InitializationItem, Item::CommitedItem].encode()),
);
}
}
#[test]