| // 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"); |
| } |