| // Copyright 2013 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. |
| |
| #[cfg(feature = "use_core")] |
| extern crate core; |
| |
| #[macro_use] |
| extern crate derivative; |
| |
| use std::collections::BTreeMap; |
| use std::iter::Iterator; |
| |
| #[derive(Derivative)] |
| #[derive(Ord, PartialOrd)] |
| #[derivative(Eq, Hash, Debug, PartialEq)] |
| // TODO: Ord, PartialOrd |
| struct Zst; |
| |
| #[test] |
| fn main() { |
| const N: usize = 8; |
| |
| for len in 0..N { |
| let mut tester = BTreeMap::new(); |
| assert_eq!(tester.len(), 0); |
| for _ in 0..len { |
| tester.insert(Zst, ()); |
| } |
| assert_eq!(tester.len(), if len == 0 { 0 } else { 1 }); |
| assert_eq!(tester.iter().count(), if len == 0 { 0 } else { 1 }); |
| assert_eq!(tester.get(&Zst).is_some(), len > 0); |
| tester.clear(); |
| } |
| } |