src/test/run-pass/zero-sized-binary-heap-push.rs


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// 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.

use std::collections::BinaryHeap;
use std::iter::Iterator;

fn main() {
    const N: usize = 8;

    for len in 0..N {
        let mut tester = BinaryHeap::with_capacity(len);
        assert_eq!(tester.len(), 0);
        assert!(tester.capacity() >= len);
        for bit in 0..len {
            tester.push(());
        }
        assert_eq!(tester.len(), len);
        assert_eq!(tester.iter().count(), len);
        tester.clear();
    }
}