openethereum/util/migration-rocksdb/tests/tests.rs

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// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.
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// OpenEthereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
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// OpenEthereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
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// along with OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
//! Tests for migrations.
//! A random temp directory is created. A database is created within it, and migrations
//! are performed in temp sub-directories.
#[macro_use]
extern crate macros;
extern crate kvdb_rocksdb;
extern crate migration_rocksdb as migration;
extern crate tempdir;
use kvdb_rocksdb::Database;
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use migration::{Batch, ChangeColumns, Config, Manager, Migration, SimpleMigration};
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use std::{
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collections::BTreeMap,
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io,
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path::{Path, PathBuf},
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sync::Arc,
};
use tempdir::TempDir;
#[inline]
fn db_path(path: &Path) -> PathBuf {
path.join("db")
}
// initialize a database at the given directory with the given values.
fn make_db(path: &Path, pairs: BTreeMap<Vec<u8>, Vec<u8>>) {
let db = Database::open_default(path.to_str().unwrap()).expect("failed to open temp database");
{
let mut transaction = db.transaction();
for (k, v) in pairs {
transaction.put(None, &k, &v);
}
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db.write(transaction)
.expect("failed to write db transaction");
}
}
// helper for verifying a migrated database.
fn verify_migration(path: &Path, pairs: BTreeMap<Vec<u8>, Vec<u8>>) {
let db = Database::open_default(path.to_str().unwrap()).unwrap();
for (k, v) in pairs {
let x = db.get(None, &k).unwrap().unwrap();
assert_eq!(&x[..], &v[..]);
}
}
struct Migration0;
impl SimpleMigration for Migration0 {
fn columns(&self) -> Option<u32> {
None
}
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fn version(&self) -> u32 {
1
}
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fn migrated_column_index(&self) -> Option<u32> {
None
}
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fn simple_migrate(
&mut self,
mut key: Vec<u8>,
mut value: Vec<u8>,
) -> Option<(Vec<u8>, Vec<u8>)> {
key.push(0x11);
value.push(0x22);
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Some((key, value))
}
}
struct Migration1;
impl SimpleMigration for Migration1 {
fn columns(&self) -> Option<u32> {
None
}
fn version(&self) -> u32 {
2
}
fn migrated_column_index(&self) -> Option<u32> {
None
}
fn simple_migrate(&mut self, key: Vec<u8>, _value: Vec<u8>) -> Option<(Vec<u8>, Vec<u8>)> {
Some((key, vec![]))
}
}
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struct AddsColumn;
impl Migration for AddsColumn {
fn pre_columns(&self) -> Option<u32> {
None
}
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fn columns(&self) -> Option<u32> {
Some(1)
}
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fn version(&self) -> u32 {
1
}
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fn migrate(
&mut self,
source: Arc<Database>,
config: &Config,
dest: &mut Database,
col: Option<u32>,
) -> io::Result<()> {
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let mut batch = Batch::new(config, col);
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for (key, value) in source.iter(col).into_iter().flat_map(|inner| inner) {
batch.insert(key.into_vec(), value.into_vec(), dest)?;
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}
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if col == Some(1) {
batch.insert(vec![1, 2, 3], vec![4, 5, 6], dest)?;
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}
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batch.commit(dest)
}
}
#[test]
fn one_simple_migration() {
let tempdir = TempDir::new("").unwrap();
let db_path = db_path(tempdir.path());
let mut manager = Manager::new(Config::default());
make_db(&db_path, map![vec![] => vec![], vec![1] => vec![1]]);
let expected = map![vec![0x11] => vec![0x22], vec![1, 0x11] => vec![1, 0x22]];
manager.add_migration(Migration0).unwrap();
let end_path = manager.execute(&db_path, 0).unwrap();
verify_migration(&end_path, expected);
}
#[test]
#[should_panic]
fn no_migration_needed() {
let tempdir = TempDir::new("").unwrap();
let db_path = db_path(tempdir.path());
let mut manager = Manager::new(Config::default());
make_db(&db_path, map![vec![] => vec![], vec![1] => vec![1]]);
manager.add_migration(Migration0).unwrap();
manager.execute(&db_path, 1).unwrap();
}
#[test]
#[should_panic]
fn wrong_adding_order() {
let tempdir = TempDir::new("").unwrap();
let db_path = db_path(tempdir.path());
let mut manager = Manager::new(Config::default());
make_db(&db_path, map![vec![] => vec![], vec![1] => vec![1]]);
manager.add_migration(Migration1).unwrap();
manager.add_migration(Migration0).unwrap();
}
#[test]
fn multiple_migrations() {
let tempdir = TempDir::new("").unwrap();
let db_path = db_path(tempdir.path());
let mut manager = Manager::new(Config::default());
make_db(&db_path, map![vec![] => vec![], vec![1] => vec![1]]);
let expected = map![vec![0x11] => vec![], vec![1, 0x11] => vec![]];
manager.add_migration(Migration0).unwrap();
manager.add_migration(Migration1).unwrap();
let end_path = manager.execute(&db_path, 0).unwrap();
verify_migration(&end_path, expected);
}
#[test]
fn second_migration() {
let tempdir = TempDir::new("").unwrap();
let db_path = db_path(tempdir.path());
let mut manager = Manager::new(Config::default());
make_db(&db_path, map![vec![] => vec![], vec![1] => vec![1]]);
let expected = map![vec![] => vec![], vec![1] => vec![]];
manager.add_migration(Migration0).unwrap();
manager.add_migration(Migration1).unwrap();
let end_path = manager.execute(&db_path, 1).unwrap();
verify_migration(&end_path, expected);
}
#[test]
fn first_and_noop_migration() {
let tempdir = TempDir::new("").unwrap();
let db_path = db_path(tempdir.path());
let mut manager = Manager::new(Config::default());
make_db(&db_path, map![vec![] => vec![], vec![1] => vec![1]]);
let expected = map![vec![0x11] => vec![0x22], vec![1, 0x11] => vec![1, 0x22]];
manager.add_migration(Migration0).unwrap();
let end_path = manager.execute(&db_path, 0).unwrap();
verify_migration(&end_path, expected);
}
#[test]
fn noop_and_second_migration() {
let tempdir = TempDir::new("").unwrap();
let db_path = db_path(tempdir.path());
let mut manager = Manager::new(Config::default());
make_db(&db_path, map![vec![] => vec![], vec![1] => vec![1]]);
let expected = map![vec![] => vec![], vec![1] => vec![]];
manager.add_migration(Migration1).unwrap();
let end_path = manager.execute(&db_path, 0).unwrap();
verify_migration(&end_path, expected);
}
#[test]
fn is_migration_needed() {
let mut manager = Manager::new(Config::default());
manager.add_migration(Migration0).unwrap();
manager.add_migration(Migration1).unwrap();
assert!(manager.is_needed(0));
assert!(manager.is_needed(1));
assert!(!manager.is_needed(2));
}
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#[test]
fn pre_columns() {
let mut manager = Manager::new(Config::default());
manager.add_migration(AddsColumn).unwrap();
let tempdir = TempDir::new("").unwrap();
let db_path = db_path(tempdir.path());
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// this shouldn't fail to open the database even though it's one column
// short of the one before it.
manager.execute(&db_path, 0).unwrap();
}
#[test]
fn change_columns() {
use kvdb_rocksdb::DatabaseConfig;
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let mut manager = Manager::new(Config::default());
manager
.add_migration(ChangeColumns {
pre_columns: None,
post_columns: Some(4),
version: 1,
})
.unwrap();
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let tempdir = TempDir::new("").unwrap();
let db_path = db_path(tempdir.path());
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let new_path = manager.execute(&db_path, 0).unwrap();
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assert_eq!(
db_path, new_path,
"Changing columns is an in-place migration."
);
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let config = DatabaseConfig::with_columns(Some(4));
let db = Database::open(&config, new_path.to_str().unwrap()).unwrap();
assert_eq!(db.num_columns(), 4);
}