465 lines
12 KiB
Rust
465 lines
12 KiB
Rust
use std::collections::binary_heap::{Drain, PeekMut};
|
|
use std::collections::BinaryHeap;
|
|
use std::iter::TrustedLen;
|
|
use std::panic::{catch_unwind, AssertUnwindSafe};
|
|
use std::sync::atomic::{AtomicU32, Ordering};
|
|
|
|
#[test]
|
|
fn test_iterator() {
|
|
let data = vec![5, 9, 3];
|
|
let iterout = [9, 5, 3];
|
|
let heap = BinaryHeap::from(data);
|
|
let mut i = 0;
|
|
for el in &heap {
|
|
assert_eq!(*el, iterout[i]);
|
|
i += 1;
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_iter_rev_cloned_collect() {
|
|
let data = vec![5, 9, 3];
|
|
let iterout = vec![3, 5, 9];
|
|
let pq = BinaryHeap::from(data);
|
|
|
|
let v: Vec<_> = pq.iter().rev().cloned().collect();
|
|
assert_eq!(v, iterout);
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_iter_collect() {
|
|
let data = vec![5, 9, 3];
|
|
let iterout = vec![9, 5, 3];
|
|
let pq = BinaryHeap::from(data);
|
|
|
|
let v: Vec<_> = pq.into_iter().collect();
|
|
assert_eq!(v, iterout);
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_iter_size_hint() {
|
|
let data = vec![5, 9];
|
|
let pq = BinaryHeap::from(data);
|
|
|
|
let mut it = pq.into_iter();
|
|
|
|
assert_eq!(it.size_hint(), (2, Some(2)));
|
|
assert_eq!(it.next(), Some(9));
|
|
|
|
assert_eq!(it.size_hint(), (1, Some(1)));
|
|
assert_eq!(it.next(), Some(5));
|
|
|
|
assert_eq!(it.size_hint(), (0, Some(0)));
|
|
assert_eq!(it.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_iter_rev_collect() {
|
|
let data = vec![5, 9, 3];
|
|
let iterout = vec![3, 5, 9];
|
|
let pq = BinaryHeap::from(data);
|
|
|
|
let v: Vec<_> = pq.into_iter().rev().collect();
|
|
assert_eq!(v, iterout);
|
|
}
|
|
|
|
#[test]
|
|
fn test_into_iter_sorted_collect() {
|
|
let heap = BinaryHeap::from(vec![2, 4, 6, 2, 1, 8, 10, 3, 5, 7, 0, 9, 1]);
|
|
let it = heap.into_iter_sorted();
|
|
let sorted = it.collect::<Vec<_>>();
|
|
assert_eq!(sorted, vec![10, 9, 8, 7, 6, 5, 4, 3, 2, 2, 1, 1, 0]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain_sorted_collect() {
|
|
let mut heap = BinaryHeap::from(vec![2, 4, 6, 2, 1, 8, 10, 3, 5, 7, 0, 9, 1]);
|
|
let it = heap.drain_sorted();
|
|
let sorted = it.collect::<Vec<_>>();
|
|
assert_eq!(sorted, vec![10, 9, 8, 7, 6, 5, 4, 3, 2, 2, 1, 1, 0]);
|
|
}
|
|
|
|
fn check_exact_size_iterator<I: ExactSizeIterator>(len: usize, it: I) {
|
|
let mut it = it;
|
|
|
|
for i in 0..it.len() {
|
|
let (lower, upper) = it.size_hint();
|
|
assert_eq!(Some(lower), upper);
|
|
assert_eq!(lower, len - i);
|
|
assert_eq!(it.len(), len - i);
|
|
it.next();
|
|
}
|
|
assert_eq!(it.len(), 0);
|
|
assert!(it.is_empty());
|
|
}
|
|
|
|
#[test]
|
|
fn test_exact_size_iterator() {
|
|
let heap = BinaryHeap::from(vec![2, 4, 6, 2, 1, 8, 10, 3, 5, 7, 0, 9, 1]);
|
|
check_exact_size_iterator(heap.len(), heap.iter());
|
|
check_exact_size_iterator(heap.len(), heap.clone().into_iter());
|
|
check_exact_size_iterator(heap.len(), heap.clone().into_iter_sorted());
|
|
check_exact_size_iterator(heap.len(), heap.clone().drain());
|
|
check_exact_size_iterator(heap.len(), heap.clone().drain_sorted());
|
|
}
|
|
|
|
fn check_trusted_len<I: TrustedLen>(len: usize, it: I) {
|
|
let mut it = it;
|
|
for i in 0..len {
|
|
let (lower, upper) = it.size_hint();
|
|
if upper.is_some() {
|
|
assert_eq!(Some(lower), upper);
|
|
assert_eq!(lower, len - i);
|
|
}
|
|
it.next();
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_trusted_len() {
|
|
let heap = BinaryHeap::from(vec![2, 4, 6, 2, 1, 8, 10, 3, 5, 7, 0, 9, 1]);
|
|
check_trusted_len(heap.len(), heap.clone().into_iter_sorted());
|
|
check_trusted_len(heap.len(), heap.clone().drain_sorted());
|
|
}
|
|
|
|
#[test]
|
|
fn test_peek_and_pop() {
|
|
let data = vec![2, 4, 6, 2, 1, 8, 10, 3, 5, 7, 0, 9, 1];
|
|
let mut sorted = data.clone();
|
|
sorted.sort();
|
|
let mut heap = BinaryHeap::from(data);
|
|
while !heap.is_empty() {
|
|
assert_eq!(heap.peek().unwrap(), sorted.last().unwrap());
|
|
assert_eq!(heap.pop().unwrap(), sorted.pop().unwrap());
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_peek_mut() {
|
|
let data = vec![2, 4, 6, 2, 1, 8, 10, 3, 5, 7, 0, 9, 1];
|
|
let mut heap = BinaryHeap::from(data);
|
|
assert_eq!(heap.peek(), Some(&10));
|
|
{
|
|
let mut top = heap.peek_mut().unwrap();
|
|
*top -= 2;
|
|
}
|
|
assert_eq!(heap.peek(), Some(&9));
|
|
}
|
|
|
|
#[test]
|
|
fn test_peek_mut_pop() {
|
|
let data = vec![2, 4, 6, 2, 1, 8, 10, 3, 5, 7, 0, 9, 1];
|
|
let mut heap = BinaryHeap::from(data);
|
|
assert_eq!(heap.peek(), Some(&10));
|
|
{
|
|
let mut top = heap.peek_mut().unwrap();
|
|
*top -= 2;
|
|
assert_eq!(PeekMut::pop(top), 8);
|
|
}
|
|
assert_eq!(heap.peek(), Some(&9));
|
|
}
|
|
|
|
#[test]
|
|
fn test_push() {
|
|
let mut heap = BinaryHeap::from(vec![2, 4, 9]);
|
|
assert_eq!(heap.len(), 3);
|
|
assert!(*heap.peek().unwrap() == 9);
|
|
heap.push(11);
|
|
assert_eq!(heap.len(), 4);
|
|
assert!(*heap.peek().unwrap() == 11);
|
|
heap.push(5);
|
|
assert_eq!(heap.len(), 5);
|
|
assert!(*heap.peek().unwrap() == 11);
|
|
heap.push(27);
|
|
assert_eq!(heap.len(), 6);
|
|
assert!(*heap.peek().unwrap() == 27);
|
|
heap.push(3);
|
|
assert_eq!(heap.len(), 7);
|
|
assert!(*heap.peek().unwrap() == 27);
|
|
heap.push(103);
|
|
assert_eq!(heap.len(), 8);
|
|
assert!(*heap.peek().unwrap() == 103);
|
|
}
|
|
|
|
#[test]
|
|
fn test_push_unique() {
|
|
let mut heap = BinaryHeap::<Box<_>>::from(vec![box 2, box 4, box 9]);
|
|
assert_eq!(heap.len(), 3);
|
|
assert!(**heap.peek().unwrap() == 9);
|
|
heap.push(box 11);
|
|
assert_eq!(heap.len(), 4);
|
|
assert!(**heap.peek().unwrap() == 11);
|
|
heap.push(box 5);
|
|
assert_eq!(heap.len(), 5);
|
|
assert!(**heap.peek().unwrap() == 11);
|
|
heap.push(box 27);
|
|
assert_eq!(heap.len(), 6);
|
|
assert!(**heap.peek().unwrap() == 27);
|
|
heap.push(box 3);
|
|
assert_eq!(heap.len(), 7);
|
|
assert!(**heap.peek().unwrap() == 27);
|
|
heap.push(box 103);
|
|
assert_eq!(heap.len(), 8);
|
|
assert!(**heap.peek().unwrap() == 103);
|
|
}
|
|
|
|
fn check_to_vec(mut data: Vec<i32>) {
|
|
let heap = BinaryHeap::from(data.clone());
|
|
let mut v = heap.clone().into_vec();
|
|
v.sort();
|
|
data.sort();
|
|
|
|
assert_eq!(v, data);
|
|
assert_eq!(heap.into_sorted_vec(), data);
|
|
}
|
|
|
|
#[test]
|
|
fn test_to_vec() {
|
|
check_to_vec(vec![]);
|
|
check_to_vec(vec![5]);
|
|
check_to_vec(vec![3, 2]);
|
|
check_to_vec(vec![2, 3]);
|
|
check_to_vec(vec![5, 1, 2]);
|
|
check_to_vec(vec![1, 100, 2, 3]);
|
|
check_to_vec(vec![1, 3, 5, 7, 9, 2, 4, 6, 8, 0]);
|
|
check_to_vec(vec![2, 4, 6, 2, 1, 8, 10, 3, 5, 7, 0, 9, 1]);
|
|
check_to_vec(vec![9, 11, 9, 9, 9, 9, 11, 2, 3, 4, 11, 9, 0, 0, 0, 0]);
|
|
check_to_vec(vec![0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
|
|
check_to_vec(vec![10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0]);
|
|
check_to_vec(vec![0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 1, 2]);
|
|
check_to_vec(vec![5, 4, 3, 2, 1, 5, 4, 3, 2, 1, 5, 4, 3, 2, 1]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_empty_pop() {
|
|
let mut heap = BinaryHeap::<i32>::new();
|
|
assert!(heap.pop().is_none());
|
|
}
|
|
|
|
#[test]
|
|
fn test_empty_peek() {
|
|
let empty = BinaryHeap::<i32>::new();
|
|
assert!(empty.peek().is_none());
|
|
}
|
|
|
|
#[test]
|
|
fn test_empty_peek_mut() {
|
|
let mut empty = BinaryHeap::<i32>::new();
|
|
assert!(empty.peek_mut().is_none());
|
|
}
|
|
|
|
#[test]
|
|
fn test_from_iter() {
|
|
let xs = vec![9, 8, 7, 6, 5, 4, 3, 2, 1];
|
|
|
|
let mut q: BinaryHeap<_> = xs.iter().rev().cloned().collect();
|
|
|
|
for &x in &xs {
|
|
assert_eq!(q.pop().unwrap(), x);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain() {
|
|
let mut q: BinaryHeap<_> = [9, 8, 7, 6, 5, 4, 3, 2, 1].iter().cloned().collect();
|
|
|
|
assert_eq!(q.drain().take(5).count(), 5);
|
|
|
|
assert!(q.is_empty());
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain_sorted() {
|
|
let mut q: BinaryHeap<_> = [9, 8, 7, 6, 5, 4, 3, 2, 1].iter().cloned().collect();
|
|
|
|
assert_eq!(q.drain_sorted().take(5).collect::<Vec<_>>(), vec![9, 8, 7, 6, 5]);
|
|
|
|
assert!(q.is_empty());
|
|
}
|
|
|
|
#[test]
|
|
fn test_drain_sorted_leak() {
|
|
static DROPS: AtomicU32 = AtomicU32::new(0);
|
|
|
|
#[derive(Clone, PartialEq, Eq, PartialOrd, Ord)]
|
|
struct D(u32, bool);
|
|
|
|
impl Drop for D {
|
|
fn drop(&mut self) {
|
|
DROPS.fetch_add(1, Ordering::SeqCst);
|
|
|
|
if self.1 {
|
|
panic!("panic in `drop`");
|
|
}
|
|
}
|
|
}
|
|
|
|
let mut q = BinaryHeap::from(vec![
|
|
D(0, false),
|
|
D(1, false),
|
|
D(2, false),
|
|
D(3, true),
|
|
D(4, false),
|
|
D(5, false),
|
|
]);
|
|
|
|
catch_unwind(AssertUnwindSafe(|| drop(q.drain_sorted()))).ok();
|
|
|
|
assert_eq!(DROPS.load(Ordering::SeqCst), 6);
|
|
}
|
|
|
|
#[test]
|
|
fn test_extend_ref() {
|
|
let mut a = BinaryHeap::new();
|
|
a.push(1);
|
|
a.push(2);
|
|
|
|
a.extend(&[3, 4, 5]);
|
|
|
|
assert_eq!(a.len(), 5);
|
|
assert_eq!(a.into_sorted_vec(), [1, 2, 3, 4, 5]);
|
|
|
|
let mut a = BinaryHeap::new();
|
|
a.push(1);
|
|
a.push(2);
|
|
let mut b = BinaryHeap::new();
|
|
b.push(3);
|
|
b.push(4);
|
|
b.push(5);
|
|
|
|
a.extend(&b);
|
|
|
|
assert_eq!(a.len(), 5);
|
|
assert_eq!(a.into_sorted_vec(), [1, 2, 3, 4, 5]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_append() {
|
|
let mut a = BinaryHeap::from(vec![-10, 1, 2, 3, 3]);
|
|
let mut b = BinaryHeap::from(vec![-20, 5, 43]);
|
|
|
|
a.append(&mut b);
|
|
|
|
assert_eq!(a.into_sorted_vec(), [-20, -10, 1, 2, 3, 3, 5, 43]);
|
|
assert!(b.is_empty());
|
|
}
|
|
|
|
#[test]
|
|
fn test_append_to_empty() {
|
|
let mut a = BinaryHeap::new();
|
|
let mut b = BinaryHeap::from(vec![-20, 5, 43]);
|
|
|
|
a.append(&mut b);
|
|
|
|
assert_eq!(a.into_sorted_vec(), [-20, 5, 43]);
|
|
assert!(b.is_empty());
|
|
}
|
|
|
|
#[test]
|
|
fn test_extend_specialization() {
|
|
let mut a = BinaryHeap::from(vec![-10, 1, 2, 3, 3]);
|
|
let b = BinaryHeap::from(vec![-20, 5, 43]);
|
|
|
|
a.extend(b);
|
|
|
|
assert_eq!(a.into_sorted_vec(), [-20, -10, 1, 2, 3, 3, 5, 43]);
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
fn assert_covariance() {
|
|
fn drain<'new>(d: Drain<'static, &'static str>) -> Drain<'new, &'new str> {
|
|
d
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_retain() {
|
|
let mut a = BinaryHeap::from(vec![-10, -5, 1, 2, 4, 13]);
|
|
a.retain(|x| x % 2 == 0);
|
|
|
|
assert_eq!(a.into_sorted_vec(), [-10, 2, 4])
|
|
}
|
|
|
|
// old binaryheap failed this test
|
|
//
|
|
// Integrity means that all elements are present after a comparison panics,
|
|
// even if the order may not be correct.
|
|
//
|
|
// Destructors must be called exactly once per element.
|
|
// FIXME: re-enable emscripten once it can unwind again
|
|
#[test]
|
|
#[cfg(not(target_os = "emscripten"))]
|
|
fn panic_safe() {
|
|
use rand::{seq::SliceRandom, thread_rng};
|
|
use std::cmp;
|
|
use std::panic::{self, AssertUnwindSafe};
|
|
use std::sync::atomic::{AtomicUsize, Ordering};
|
|
|
|
static DROP_COUNTER: AtomicUsize = AtomicUsize::new(0);
|
|
|
|
#[derive(Eq, PartialEq, Ord, Clone, Debug)]
|
|
struct PanicOrd<T>(T, bool);
|
|
|
|
impl<T> Drop for PanicOrd<T> {
|
|
fn drop(&mut self) {
|
|
// update global drop count
|
|
DROP_COUNTER.fetch_add(1, Ordering::SeqCst);
|
|
}
|
|
}
|
|
|
|
impl<T: PartialOrd> PartialOrd for PanicOrd<T> {
|
|
fn partial_cmp(&self, other: &Self) -> Option<cmp::Ordering> {
|
|
if self.1 || other.1 {
|
|
panic!("Panicking comparison");
|
|
}
|
|
self.0.partial_cmp(&other.0)
|
|
}
|
|
}
|
|
let mut rng = thread_rng();
|
|
const DATASZ: usize = 32;
|
|
// Miri is too slow
|
|
let ntest = if cfg!(miri) { 1 } else { 10 };
|
|
|
|
// don't use 0 in the data -- we want to catch the zeroed-out case.
|
|
let data = (1..=DATASZ).collect::<Vec<_>>();
|
|
|
|
// since it's a fuzzy test, run several tries.
|
|
for _ in 0..ntest {
|
|
for i in 1..=DATASZ {
|
|
DROP_COUNTER.store(0, Ordering::SeqCst);
|
|
|
|
let mut panic_ords: Vec<_> =
|
|
data.iter().filter(|&&x| x != i).map(|&x| PanicOrd(x, false)).collect();
|
|
let panic_item = PanicOrd(i, true);
|
|
|
|
// heapify the sane items
|
|
panic_ords.shuffle(&mut rng);
|
|
let mut heap = BinaryHeap::from(panic_ords);
|
|
let inner_data;
|
|
|
|
{
|
|
// push the panicking item to the heap and catch the panic
|
|
let thread_result = {
|
|
let mut heap_ref = AssertUnwindSafe(&mut heap);
|
|
panic::catch_unwind(move || {
|
|
heap_ref.push(panic_item);
|
|
})
|
|
};
|
|
assert!(thread_result.is_err());
|
|
|
|
// Assert no elements were dropped
|
|
let drops = DROP_COUNTER.load(Ordering::SeqCst);
|
|
assert!(drops == 0, "Must not drop items. drops={}", drops);
|
|
inner_data = heap.clone().into_vec();
|
|
drop(heap);
|
|
}
|
|
let drops = DROP_COUNTER.load(Ordering::SeqCst);
|
|
assert_eq!(drops, DATASZ);
|
|
|
|
let mut data_sorted = inner_data.into_iter().map(|p| p.0).collect::<Vec<_>>();
|
|
data_sorted.sort();
|
|
assert_eq!(data_sorted, data);
|
|
}
|
|
}
|
|
}
|