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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use super::SnapshotMap;
#[test]
fn basic() {
let mut map = SnapshotMap::new();
map.insert(22, "twenty-two");
let snapshot = map.snapshot();
map.insert(22, "thirty-three");
assert_eq!(map[&22], "thirty-three");
map.insert(44, "fourty-four");
assert_eq!(map[&44], "fourty-four");
assert_eq!(map.get(&33), None);
map.rollback_to(snapshot);
assert_eq!(map[&22], "twenty-two");
assert_eq!(map.get(&33), None);
assert_eq!(map.get(&44), None);
}
#[test]
#[should_panic]
fn out_of_order() {
let mut map = SnapshotMap::new();
map.insert(22, "twenty-two");
let snapshot1 = map.snapshot();
let _snapshot2 = map.snapshot();
map.rollback_to(snapshot1);
}
#[test]
fn nested_commit_then_rollback() {
let mut map = SnapshotMap::new();
map.insert(22, "twenty-two");
let snapshot1 = map.snapshot();
let snapshot2 = map.snapshot();
map.insert(22, "thirty-three");
map.commit(snapshot2);
assert_eq!(map[&22], "thirty-three");
map.rollback_to(snapshot1);
assert_eq!(map[&22], "twenty-two");
}
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