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fix earliest_era on empty db (#4316)

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Robert Habermeier 2017-01-30 11:20:41 -05:00 committed by Gav Wood
parent 00c4c71176
commit 5b2b4717f6
1 changed files with 49 additions and 0 deletions
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49
util/src/journaldb/overlayrecentdb.rs
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@ -296,6 +296,11 @@ impl JournalDB for OverlayRecentDB {
journal_overlay.latest_era = Some(now);
}
if journal_overlay.earliest_era.map_or(true, |e| e > now) {
trace!(target: "journaldb", "Set earliest era to {}", now);
journal_overlay.earliest_era = Some(now);
}
journal_overlay.journal.entry(now).or_insert_with(Vec::new).push(JournalEntry { id: id.clone(), insertions: inserted_keys, deletions: removed_keys });
Ok(ops as u32)
}
@ -359,6 +364,7 @@ impl JournalDB for OverlayRecentDB {
}
}
journal_overlay.journal.remove(&end_era);
if !journal_overlay.journal.is_empty() {
trace!(target: "journaldb", "Set earliest_era to {}", end_era + 1);
journal_overlay.earliest_era = Some(end_era + 1);
@ -988,4 +994,47 @@ mod tests {
assert!(jdb.get(&key).is_none());
}
#[test]
fn earliest_era() {
let temp = ::devtools::RandomTempPath::new();
// empty DB
let mut jdb = new_db(temp.as_path().as_path());
assert!(jdb.earliest_era().is_none());
// single journalled era.
let _key = jdb.insert(b"hello!");
let mut batch = jdb.backing().transaction();
jdb.journal_under(&mut batch, 0, &b"0".sha3()).unwrap();
jdb.backing().write_buffered(batch);
assert_eq!(jdb.earliest_era(), Some(0));
// second journalled era.
let mut batch = jdb.backing().transaction();
jdb.journal_under(&mut batch, 1, &b"1".sha3()).unwrap();
jdb.backing().write_buffered(batch);
assert_eq!(jdb.earliest_era(), Some(0));
// single journalled era.
let mut batch = jdb.backing().transaction();
jdb.mark_canonical(&mut batch, 0, &b"0".sha3()).unwrap();
jdb.backing().write_buffered(batch);
assert_eq!(jdb.earliest_era(), Some(1));
// no journalled eras.
let mut batch = jdb.backing().transaction();
jdb.mark_canonical(&mut batch, 1, &b"1".sha3()).unwrap();
jdb.backing().write_buffered(batch);
assert_eq!(jdb.earliest_era(), Some(1));
// reconstructed: no journal entries.
drop(jdb);
let jdb = new_db(temp.as_path().as_path());
assert_eq!(jdb.earliest_era(), None);
}
}