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