#[cfg(test)]
mod tests {
    use pyority_queue::backing::pure::{BinaryHeap, PureBacking};

    #[test]
    fn test_pure_binary_heap_manual_creation() {
        let mut heap = BinaryHeap::new();
        heap.add(4);
        heap.add(-3);
        heap.add(6);
        heap.add(1);
        assert_eq!(heap.len(), 4);
        assert_eq!(heap.pop(), Some(-3));
        assert_eq!(heap.pop(), Some(1));
        assert_eq!(heap.pop(), Some(4));
        assert_eq!(heap.pop(), Some(6));
        assert_eq!(heap.pop(), None);
    }

    #[test]
    fn test_pure_binary_heap_from_iter() {
        let mut heap = BinaryHeap::from_iter(vec![7, 3, 6, 9]);
        assert_eq!(heap.len(), 4);
        assert_eq!(heap.pop(), Some(3));
        assert_eq!(heap.pop(), Some(6));
        assert_eq!(heap.pop(), Some(7));
        assert_eq!(heap.pop(), Some(9));
        assert_eq!(heap.pop(), None);
    }
}