use super::SpecExtend;
+#[cfg(test)]
+mod tests;
+
/// A priority queue implemented with a binary heap.
///
/// This will be a max-heap.
--- /dev/null
+use super::*;
+use crate::boxed::Box;
+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_in_place_iterator_specialization() {
+ let src: Vec<usize> = vec![1, 2, 3];
+ let src_ptr = src.as_ptr();
+ let heap: BinaryHeap<_> = src.into_iter().map(std::convert::identity).collect();
+ let heap_ptr = heap.iter().next().unwrap() as *const usize;
+ assert_eq!(src_ptr, heap_ptr);
+ let sink: Vec<_> = heap.into_iter().map(std::convert::identity).collect();
+ let sink_ptr = sink.as_ptr();
+ assert_eq!(heap_ptr, sink_ptr);
+}
+
+#[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![100, 10, 50, 1, 2, 20, 30]);
+ a.retain(|&x| x != 2);
+
+ // Check that 20 moved into 10's place.
+ assert_eq!(a.clone().into_vec(), [100, 20, 50, 1, 10, 30]);
+
+ a.retain(|_| true);
+
+ assert_eq!(a.clone().into_vec(), [100, 20, 50, 1, 10, 30]);
+
+ a.retain(|&x| x < 50);
+
+ assert_eq!(a.clone().into_vec(), [30, 20, 10, 1]);
+
+ a.retain(|_| false);
+
+ assert!(a.is_empty());
+}
+
+// old binaryheap failed this test
+//
+// Integrity means that all elements are present after a comparison panics,
+// even if the order might 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);
+ }
+ }
+}
use super::*;
+use crate::vec::Vec;
+use std::panic::{catch_unwind, AssertUnwindSafe};
use std::thread;
-use std::vec::Vec;
use rand::{thread_rng, RngCore};
+#[test]
+fn test_basic() {
+ let mut m = LinkedList::<Box<_>>::new();
+ assert_eq!(m.pop_front(), None);
+ assert_eq!(m.pop_back(), None);
+ assert_eq!(m.pop_front(), None);
+ m.push_front(box 1);
+ assert_eq!(m.pop_front(), Some(box 1));
+ m.push_back(box 2);
+ m.push_back(box 3);
+ assert_eq!(m.len(), 2);
+ assert_eq!(m.pop_front(), Some(box 2));
+ assert_eq!(m.pop_front(), Some(box 3));
+ assert_eq!(m.len(), 0);
+ assert_eq!(m.pop_front(), None);
+ m.push_back(box 1);
+ m.push_back(box 3);
+ m.push_back(box 5);
+ m.push_back(box 7);
+ assert_eq!(m.pop_front(), Some(box 1));
+
+ let mut n = LinkedList::new();
+ n.push_front(2);
+ n.push_front(3);
+ {
+ assert_eq!(n.front().unwrap(), &3);
+ let x = n.front_mut().unwrap();
+ assert_eq!(*x, 3);
+ *x = 0;
+ }
+ {
+ assert_eq!(n.back().unwrap(), &2);
+ let y = n.back_mut().unwrap();
+ assert_eq!(*y, 2);
+ *y = 1;
+ }
+ assert_eq!(n.pop_front(), Some(0));
+ assert_eq!(n.pop_front(), Some(1));
+}
+
+fn generate_test() -> LinkedList<i32> {
+ list_from(&[0, 1, 2, 3, 4, 5, 6])
+}
+
fn list_from<T: Clone>(v: &[T]) -> LinkedList<T> {
v.iter().cloned().collect()
}
check_links(&n);
}
+#[test]
+fn test_iterator() {
+ let m = generate_test();
+ for (i, elt) in m.iter().enumerate() {
+ assert_eq!(i as i32, *elt);
+ }
+ let mut n = LinkedList::new();
+ assert_eq!(n.iter().next(), None);
+ n.push_front(4);
+ let mut it = n.iter();
+ assert_eq!(it.size_hint(), (1, Some(1)));
+ assert_eq!(it.next().unwrap(), &4);
+ assert_eq!(it.size_hint(), (0, Some(0)));
+ assert_eq!(it.next(), None);
+}
+
+#[test]
+fn test_iterator_clone() {
+ let mut n = LinkedList::new();
+ n.push_back(2);
+ n.push_back(3);
+ n.push_back(4);
+ let mut it = n.iter();
+ it.next();
+ let mut jt = it.clone();
+ assert_eq!(it.next(), jt.next());
+ assert_eq!(it.next_back(), jt.next_back());
+ assert_eq!(it.next(), jt.next());
+}
+
+#[test]
+fn test_iterator_double_end() {
+ let mut n = LinkedList::new();
+ assert_eq!(n.iter().next(), None);
+ n.push_front(4);
+ n.push_front(5);
+ n.push_front(6);
+ let mut it = n.iter();
+ assert_eq!(it.size_hint(), (3, Some(3)));
+ assert_eq!(it.next().unwrap(), &6);
+ assert_eq!(it.size_hint(), (2, Some(2)));
+ assert_eq!(it.next_back().unwrap(), &4);
+ assert_eq!(it.size_hint(), (1, Some(1)));
+ assert_eq!(it.next_back().unwrap(), &5);
+ assert_eq!(it.next_back(), None);
+ assert_eq!(it.next(), None);
+}
+
+#[test]
+fn test_rev_iter() {
+ let m = generate_test();
+ for (i, elt) in m.iter().rev().enumerate() {
+ assert_eq!((6 - i) as i32, *elt);
+ }
+ let mut n = LinkedList::new();
+ assert_eq!(n.iter().rev().next(), None);
+ n.push_front(4);
+ let mut it = n.iter().rev();
+ assert_eq!(it.size_hint(), (1, Some(1)));
+ assert_eq!(it.next().unwrap(), &4);
+ assert_eq!(it.size_hint(), (0, Some(0)));
+ assert_eq!(it.next(), None);
+}
+
+#[test]
+fn test_mut_iter() {
+ let mut m = generate_test();
+ let mut len = m.len();
+ for (i, elt) in m.iter_mut().enumerate() {
+ assert_eq!(i as i32, *elt);
+ len -= 1;
+ }
+ assert_eq!(len, 0);
+ let mut n = LinkedList::new();
+ assert!(n.iter_mut().next().is_none());
+ n.push_front(4);
+ n.push_back(5);
+ let mut it = n.iter_mut();
+ assert_eq!(it.size_hint(), (2, Some(2)));
+ assert!(it.next().is_some());
+ assert!(it.next().is_some());
+ assert_eq!(it.size_hint(), (0, Some(0)));
+ assert!(it.next().is_none());
+}
+
+#[test]
+fn test_iterator_mut_double_end() {
+ let mut n = LinkedList::new();
+ assert!(n.iter_mut().next_back().is_none());
+ n.push_front(4);
+ n.push_front(5);
+ n.push_front(6);
+ let mut it = n.iter_mut();
+ assert_eq!(it.size_hint(), (3, Some(3)));
+ assert_eq!(*it.next().unwrap(), 6);
+ assert_eq!(it.size_hint(), (2, Some(2)));
+ assert_eq!(*it.next_back().unwrap(), 4);
+ assert_eq!(it.size_hint(), (1, Some(1)));
+ assert_eq!(*it.next_back().unwrap(), 5);
+ assert!(it.next_back().is_none());
+ assert!(it.next().is_none());
+}
+
+#[test]
+fn test_mut_rev_iter() {
+ let mut m = generate_test();
+ for (i, elt) in m.iter_mut().rev().enumerate() {
+ assert_eq!((6 - i) as i32, *elt);
+ }
+ let mut n = LinkedList::new();
+ assert!(n.iter_mut().rev().next().is_none());
+ n.push_front(4);
+ let mut it = n.iter_mut().rev();
+ assert!(it.next().is_some());
+ assert!(it.next().is_none());
+}
+
#[test]
fn test_clone_from() {
// Short cloned from long
}
#[test]
-fn test_fuzz() {
- for _ in 0..25 {
- fuzz_test(3);
- fuzz_test(16);
- #[cfg(not(miri))] // Miri is too slow
- fuzz_test(189);
- }
+fn test_eq() {
+ let mut n = list_from(&[]);
+ let mut m = list_from(&[]);
+ assert!(n == m);
+ n.push_front(1);
+ assert!(n != m);
+ m.push_back(1);
+ assert!(n == m);
+
+ let n = list_from(&[2, 3, 4]);
+ let m = list_from(&[1, 2, 3]);
+ assert!(n != m);
+}
+
+#[test]
+fn test_ord() {
+ let n = list_from(&[]);
+ let m = list_from(&[1, 2, 3]);
+ assert!(n < m);
+ assert!(m > n);
+ assert!(n <= n);
+ assert!(n >= n);
+}
+
+#[test]
+fn test_ord_nan() {
+ let nan = 0.0f64 / 0.0;
+ let n = list_from(&[nan]);
+ let m = list_from(&[nan]);
+ assert!(!(n < m));
+ assert!(!(n > m));
+ assert!(!(n <= m));
+ assert!(!(n >= m));
+
+ let n = list_from(&[nan]);
+ let one = list_from(&[1.0f64]);
+ assert!(!(n < one));
+ assert!(!(n > one));
+ assert!(!(n <= one));
+ assert!(!(n >= one));
+
+ let u = list_from(&[1.0f64, 2.0, nan]);
+ let v = list_from(&[1.0f64, 2.0, 3.0]);
+ assert!(!(u < v));
+ assert!(!(u > v));
+ assert!(!(u <= v));
+ assert!(!(u >= v));
+
+ let s = list_from(&[1.0f64, 2.0, 4.0, 2.0]);
+ let t = list_from(&[1.0f64, 2.0, 3.0, 2.0]);
+ assert!(!(s < t));
+ assert!(s > one);
+ assert!(!(s <= one));
+ assert!(s >= one);
}
#[test]
}
}
+#[test]
+fn test_split_off_2() {
+ // singleton
+ {
+ let mut m = LinkedList::new();
+ m.push_back(1);
+
+ let p = m.split_off(0);
+ assert_eq!(m.len(), 0);
+ assert_eq!(p.len(), 1);
+ assert_eq!(p.back(), Some(&1));
+ assert_eq!(p.front(), Some(&1));
+ }
+
+ // not singleton, forwards
+ {
+ let u = vec![1, 2, 3, 4, 5];
+ let mut m = list_from(&u);
+ let mut n = m.split_off(2);
+ assert_eq!(m.len(), 2);
+ assert_eq!(n.len(), 3);
+ for elt in 1..3 {
+ assert_eq!(m.pop_front(), Some(elt));
+ }
+ for elt in 3..6 {
+ assert_eq!(n.pop_front(), Some(elt));
+ }
+ }
+ // not singleton, backwards
+ {
+ let u = vec![1, 2, 3, 4, 5];
+ let mut m = list_from(&u);
+ let mut n = m.split_off(4);
+ assert_eq!(m.len(), 4);
+ assert_eq!(n.len(), 1);
+ for elt in 1..5 {
+ assert_eq!(m.pop_front(), Some(elt));
+ }
+ for elt in 5..6 {
+ assert_eq!(n.pop_front(), Some(elt));
+ }
+ }
+
+ // no-op on the last index
+ {
+ let mut m = LinkedList::new();
+ m.push_back(1);
+
+ let p = m.split_off(1);
+ assert_eq!(m.len(), 1);
+ assert_eq!(p.len(), 0);
+ assert_eq!(m.back(), Some(&1));
+ assert_eq!(m.front(), Some(&1));
+ }
+}
+
fn fuzz_test(sz: i32) {
let mut m: LinkedList<_> = LinkedList::new();
let mut v = vec![];
assert_eq!(i, v.len());
}
+#[test]
+fn test_fuzz() {
+ for _ in 0..25 {
+ fuzz_test(3);
+ fuzz_test(16);
+ #[cfg(not(miri))] // Miri is too slow
+ fuzz_test(189);
+ }
+}
+
+#[test]
+fn test_show() {
+ let list: LinkedList<_> = (0..10).collect();
+ assert_eq!(format!("{list:?}"), "[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]");
+
+ let list: LinkedList<_> = ["just", "one", "test", "more"].into_iter().collect();
+ assert_eq!(format!("{list:?}"), "[\"just\", \"one\", \"test\", \"more\"]");
+}
+
#[test]
fn drain_filter_test() {
let mut m: LinkedList<u32> = LinkedList::new();
assert_eq!(c.current(), None);
assert_eq!(c.index, 2);
}
+
+#[test]
+fn test_extend_ref() {
+ let mut a = LinkedList::new();
+ a.push_back(1);
+
+ a.extend(&[2, 3, 4]);
+
+ assert_eq!(a.len(), 4);
+ assert_eq!(a, list_from(&[1, 2, 3, 4]));
+
+ let mut b = LinkedList::new();
+ b.push_back(5);
+ b.push_back(6);
+ a.extend(&b);
+
+ assert_eq!(a.len(), 6);
+ assert_eq!(a, list_from(&[1, 2, 3, 4, 5, 6]));
+}
+
+#[test]
+fn test_extend() {
+ let mut a = LinkedList::new();
+ a.push_back(1);
+ a.extend(vec![2, 3, 4]); // uses iterator
+
+ assert_eq!(a.len(), 4);
+ assert!(a.iter().eq(&[1, 2, 3, 4]));
+
+ let b: LinkedList<_> = [5, 6, 7].into_iter().collect();
+ a.extend(b); // specializes to `append`
+
+ assert_eq!(a.len(), 7);
+ assert!(a.iter().eq(&[1, 2, 3, 4, 5, 6, 7]));
+}
+
+#[test]
+fn test_contains() {
+ let mut l = LinkedList::new();
+ l.extend(&[2, 3, 4]);
+
+ assert!(l.contains(&3));
+ assert!(!l.contains(&1));
+
+ l.clear();
+
+ assert!(!l.contains(&3));
+}
+
+#[test]
+fn drain_filter_empty() {
+ let mut list: LinkedList<i32> = LinkedList::new();
+
+ {
+ let mut iter = list.drain_filter(|_| true);
+ assert_eq!(iter.size_hint(), (0, Some(0)));
+ assert_eq!(iter.next(), None);
+ assert_eq!(iter.size_hint(), (0, Some(0)));
+ assert_eq!(iter.next(), None);
+ assert_eq!(iter.size_hint(), (0, Some(0)));
+ }
+
+ assert_eq!(list.len(), 0);
+ assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![]);
+}
+
+#[test]
+fn drain_filter_zst() {
+ let mut list: LinkedList<_> = [(), (), (), (), ()].into_iter().collect();
+ let initial_len = list.len();
+ let mut count = 0;
+
+ {
+ let mut iter = list.drain_filter(|_| true);
+ assert_eq!(iter.size_hint(), (0, Some(initial_len)));
+ while let Some(_) = iter.next() {
+ count += 1;
+ assert_eq!(iter.size_hint(), (0, Some(initial_len - count)));
+ }
+ assert_eq!(iter.size_hint(), (0, Some(0)));
+ assert_eq!(iter.next(), None);
+ assert_eq!(iter.size_hint(), (0, Some(0)));
+ }
+
+ assert_eq!(count, initial_len);
+ assert_eq!(list.len(), 0);
+ assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![]);
+}
+
+#[test]
+fn drain_filter_false() {
+ let mut list: LinkedList<_> = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10].into_iter().collect();
+
+ let initial_len = list.len();
+ let mut count = 0;
+
+ {
+ let mut iter = list.drain_filter(|_| false);
+ assert_eq!(iter.size_hint(), (0, Some(initial_len)));
+ for _ in iter.by_ref() {
+ count += 1;
+ }
+ assert_eq!(iter.size_hint(), (0, Some(0)));
+ assert_eq!(iter.next(), None);
+ assert_eq!(iter.size_hint(), (0, Some(0)));
+ }
+
+ assert_eq!(count, 0);
+ assert_eq!(list.len(), initial_len);
+ assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+}
+
+#[test]
+fn drain_filter_true() {
+ let mut list: LinkedList<_> = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10].into_iter().collect();
+
+ let initial_len = list.len();
+ let mut count = 0;
+
+ {
+ let mut iter = list.drain_filter(|_| true);
+ assert_eq!(iter.size_hint(), (0, Some(initial_len)));
+ while let Some(_) = iter.next() {
+ count += 1;
+ assert_eq!(iter.size_hint(), (0, Some(initial_len - count)));
+ }
+ assert_eq!(iter.size_hint(), (0, Some(0)));
+ assert_eq!(iter.next(), None);
+ assert_eq!(iter.size_hint(), (0, Some(0)));
+ }
+
+ assert_eq!(count, initial_len);
+ assert_eq!(list.len(), 0);
+ assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![]);
+}
+
+#[test]
+fn drain_filter_complex() {
+ {
+ // [+xxx++++++xxxxx++++x+x++]
+ let mut list = [
+ 1, 2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35, 36, 37,
+ 39,
+ ]
+ .into_iter()
+ .collect::<LinkedList<_>>();
+
+ let removed = list.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
+ assert_eq!(removed.len(), 10);
+ assert_eq!(removed, vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]);
+
+ assert_eq!(list.len(), 14);
+ assert_eq!(
+ list.into_iter().collect::<Vec<_>>(),
+ vec![1, 7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35, 37, 39]
+ );
+ }
+
+ {
+ // [xxx++++++xxxxx++++x+x++]
+ let mut list =
+ [2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35, 36, 37, 39]
+ .into_iter()
+ .collect::<LinkedList<_>>();
+
+ let removed = list.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
+ assert_eq!(removed.len(), 10);
+ assert_eq!(removed, vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]);
+
+ assert_eq!(list.len(), 13);
+ assert_eq!(
+ list.into_iter().collect::<Vec<_>>(),
+ vec![7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35, 37, 39]
+ );
+ }
+
+ {
+ // [xxx++++++xxxxx++++x+x]
+ let mut list =
+ [2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35, 36]
+ .into_iter()
+ .collect::<LinkedList<_>>();
+
+ let removed = list.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
+ assert_eq!(removed.len(), 10);
+ assert_eq!(removed, vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]);
+
+ assert_eq!(list.len(), 11);
+ assert_eq!(
+ list.into_iter().collect::<Vec<_>>(),
+ vec![7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35]
+ );
+ }
+
+ {
+ // [xxxxxxxxxx+++++++++++]
+ let mut list = [2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19]
+ .into_iter()
+ .collect::<LinkedList<_>>();
+
+ let removed = list.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
+ assert_eq!(removed.len(), 10);
+ assert_eq!(removed, vec![2, 4, 6, 8, 10, 12, 14, 16, 18, 20]);
+
+ assert_eq!(list.len(), 10);
+ assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![1, 3, 5, 7, 9, 11, 13, 15, 17, 19]);
+ }
+
+ {
+ // [+++++++++++xxxxxxxxxx]
+ let mut list = [1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20]
+ .into_iter()
+ .collect::<LinkedList<_>>();
+
+ let removed = list.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
+ assert_eq!(removed.len(), 10);
+ assert_eq!(removed, vec![2, 4, 6, 8, 10, 12, 14, 16, 18, 20]);
+
+ assert_eq!(list.len(), 10);
+ assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![1, 3, 5, 7, 9, 11, 13, 15, 17, 19]);
+ }
+}
+
+#[test]
+fn drain_filter_drop_panic_leak() {
+ static mut DROPS: i32 = 0;
+
+ struct D(bool);
+
+ impl Drop for D {
+ fn drop(&mut self) {
+ unsafe {
+ DROPS += 1;
+ }
+
+ if self.0 {
+ panic!("panic in `drop`");
+ }
+ }
+ }
+
+ let mut q = LinkedList::new();
+ q.push_back(D(false));
+ q.push_back(D(false));
+ q.push_back(D(false));
+ q.push_back(D(false));
+ q.push_back(D(false));
+ q.push_front(D(false));
+ q.push_front(D(true));
+ q.push_front(D(false));
+
+ catch_unwind(AssertUnwindSafe(|| drop(q.drain_filter(|_| true)))).ok();
+
+ assert_eq!(unsafe { DROPS }, 8);
+ assert!(q.is_empty());
+}
+
+#[test]
+fn drain_filter_pred_panic_leak() {
+ static mut DROPS: i32 = 0;
+
+ #[derive(Debug)]
+ struct D(u32);
+
+ impl Drop for D {
+ fn drop(&mut self) {
+ unsafe {
+ DROPS += 1;
+ }
+ }
+ }
+
+ let mut q = LinkedList::new();
+ q.push_back(D(3));
+ q.push_back(D(4));
+ q.push_back(D(5));
+ q.push_back(D(6));
+ q.push_back(D(7));
+ q.push_front(D(2));
+ q.push_front(D(1));
+ q.push_front(D(0));
+
+ catch_unwind(AssertUnwindSafe(|| {
+ drop(q.drain_filter(|item| if item.0 >= 2 { panic!() } else { true }))
+ }))
+ .ok();
+
+ assert_eq!(unsafe { DROPS }, 2); // 0 and 1
+ assert_eq!(q.len(), 6);
+}
+
+#[test]
+fn test_drop() {
+ static mut DROPS: i32 = 0;
+ struct Elem;
+ impl Drop for Elem {
+ fn drop(&mut self) {
+ unsafe {
+ DROPS += 1;
+ }
+ }
+ }
+
+ let mut ring = LinkedList::new();
+ ring.push_back(Elem);
+ ring.push_front(Elem);
+ ring.push_back(Elem);
+ ring.push_front(Elem);
+ drop(ring);
+
+ assert_eq!(unsafe { DROPS }, 4);
+}
+
+#[test]
+fn test_drop_with_pop() {
+ static mut DROPS: i32 = 0;
+ struct Elem;
+ impl Drop for Elem {
+ fn drop(&mut self) {
+ unsafe {
+ DROPS += 1;
+ }
+ }
+ }
+
+ let mut ring = LinkedList::new();
+ ring.push_back(Elem);
+ ring.push_front(Elem);
+ ring.push_back(Elem);
+ ring.push_front(Elem);
+
+ drop(ring.pop_back());
+ drop(ring.pop_front());
+ assert_eq!(unsafe { DROPS }, 2);
+
+ drop(ring);
+ assert_eq!(unsafe { DROPS }, 4);
+}
+
+#[test]
+fn test_drop_clear() {
+ static mut DROPS: i32 = 0;
+ struct Elem;
+ impl Drop for Elem {
+ fn drop(&mut self) {
+ unsafe {
+ DROPS += 1;
+ }
+ }
+ }
+
+ let mut ring = LinkedList::new();
+ ring.push_back(Elem);
+ ring.push_front(Elem);
+ ring.push_back(Elem);
+ ring.push_front(Elem);
+ ring.clear();
+ assert_eq!(unsafe { DROPS }, 4);
+
+ drop(ring);
+ assert_eq!(unsafe { DROPS }, 4);
+}
+
+#[test]
+fn test_drop_panic() {
+ static mut DROPS: i32 = 0;
+
+ struct D(bool);
+
+ impl Drop for D {
+ fn drop(&mut self) {
+ unsafe {
+ DROPS += 1;
+ }
+
+ if self.0 {
+ panic!("panic in `drop`");
+ }
+ }
+ }
+
+ let mut q = LinkedList::new();
+ q.push_back(D(false));
+ q.push_back(D(false));
+ q.push_back(D(false));
+ q.push_back(D(false));
+ q.push_back(D(false));
+ q.push_front(D(false));
+ q.push_front(D(false));
+ q.push_front(D(true));
+
+ catch_unwind(move || drop(q)).ok();
+
+ assert_eq!(unsafe { DROPS }, 8);
+}
+++ /dev/null
-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_in_place_iterator_specialization() {
- let src: Vec<usize> = vec![1, 2, 3];
- let src_ptr = src.as_ptr();
- let heap: BinaryHeap<_> = src.into_iter().map(std::convert::identity).collect();
- let heap_ptr = heap.iter().next().unwrap() as *const usize;
- assert_eq!(src_ptr, heap_ptr);
- let sink: Vec<_> = heap.into_iter().map(std::convert::identity).collect();
- let sink_ptr = sink.as_ptr();
- assert_eq!(heap_ptr, sink_ptr);
-}
-
-#[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![100, 10, 50, 1, 2, 20, 30]);
- a.retain(|&x| x != 2);
-
- // Check that 20 moved into 10's place.
- assert_eq!(a.clone().into_vec(), [100, 20, 50, 1, 10, 30]);
-
- a.retain(|_| true);
-
- assert_eq!(a.clone().into_vec(), [100, 20, 50, 1, 10, 30]);
-
- a.retain(|&x| x < 50);
-
- assert_eq!(a.clone().into_vec(), [30, 20, 10, 1]);
-
- a.retain(|_| false);
-
- assert!(a.is_empty());
-}
-
-// old binaryheap failed this test
-//
-// Integrity means that all elements are present after a comparison panics,
-// even if the order might 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);
- }
- }
-}
use std::hash::{Hash, Hasher};
mod arc;
-mod binary_heap;
mod borrow;
mod boxed;
mod btree_set_hash;
use std::collections::LinkedList;
-use std::panic::{catch_unwind, AssertUnwindSafe};
-
-#[test]
-fn test_basic() {
- let mut m = LinkedList::<Box<_>>::new();
- assert_eq!(m.pop_front(), None);
- assert_eq!(m.pop_back(), None);
- assert_eq!(m.pop_front(), None);
- m.push_front(box 1);
- assert_eq!(m.pop_front(), Some(box 1));
- m.push_back(box 2);
- m.push_back(box 3);
- assert_eq!(m.len(), 2);
- assert_eq!(m.pop_front(), Some(box 2));
- assert_eq!(m.pop_front(), Some(box 3));
- assert_eq!(m.len(), 0);
- assert_eq!(m.pop_front(), None);
- m.push_back(box 1);
- m.push_back(box 3);
- m.push_back(box 5);
- m.push_back(box 7);
- assert_eq!(m.pop_front(), Some(box 1));
-
- let mut n = LinkedList::new();
- n.push_front(2);
- n.push_front(3);
- {
- assert_eq!(n.front().unwrap(), &3);
- let x = n.front_mut().unwrap();
- assert_eq!(*x, 3);
- *x = 0;
- }
- {
- assert_eq!(n.back().unwrap(), &2);
- let y = n.back_mut().unwrap();
- assert_eq!(*y, 2);
- *y = 1;
- }
- assert_eq!(n.pop_front(), Some(0));
- assert_eq!(n.pop_front(), Some(1));
-}
-
-fn generate_test() -> LinkedList<i32> {
- list_from(&[0, 1, 2, 3, 4, 5, 6])
-}
-
-fn list_from<T: Clone>(v: &[T]) -> LinkedList<T> {
- v.iter().cloned().collect()
-}
-
-#[test]
-fn test_split_off() {
- // singleton
- {
- let mut m = LinkedList::new();
- m.push_back(1);
-
- let p = m.split_off(0);
- assert_eq!(m.len(), 0);
- assert_eq!(p.len(), 1);
- assert_eq!(p.back(), Some(&1));
- assert_eq!(p.front(), Some(&1));
- }
-
- // not singleton, forwards
- {
- let u = vec![1, 2, 3, 4, 5];
- let mut m = list_from(&u);
- let mut n = m.split_off(2);
- assert_eq!(m.len(), 2);
- assert_eq!(n.len(), 3);
- for elt in 1..3 {
- assert_eq!(m.pop_front(), Some(elt));
- }
- for elt in 3..6 {
- assert_eq!(n.pop_front(), Some(elt));
- }
- }
- // not singleton, backwards
- {
- let u = vec![1, 2, 3, 4, 5];
- let mut m = list_from(&u);
- let mut n = m.split_off(4);
- assert_eq!(m.len(), 4);
- assert_eq!(n.len(), 1);
- for elt in 1..5 {
- assert_eq!(m.pop_front(), Some(elt));
- }
- for elt in 5..6 {
- assert_eq!(n.pop_front(), Some(elt));
- }
- }
-
- // no-op on the last index
- {
- let mut m = LinkedList::new();
- m.push_back(1);
-
- let p = m.split_off(1);
- assert_eq!(m.len(), 1);
- assert_eq!(p.len(), 0);
- assert_eq!(m.back(), Some(&1));
- assert_eq!(m.front(), Some(&1));
- }
-}
-
-#[test]
-fn test_iterator() {
- let m = generate_test();
- for (i, elt) in m.iter().enumerate() {
- assert_eq!(i as i32, *elt);
- }
- let mut n = LinkedList::new();
- assert_eq!(n.iter().next(), None);
- n.push_front(4);
- let mut it = n.iter();
- assert_eq!(it.size_hint(), (1, Some(1)));
- assert_eq!(it.next().unwrap(), &4);
- assert_eq!(it.size_hint(), (0, Some(0)));
- assert_eq!(it.next(), None);
-}
-
-#[test]
-fn test_iterator_clone() {
- let mut n = LinkedList::new();
- n.push_back(2);
- n.push_back(3);
- n.push_back(4);
- let mut it = n.iter();
- it.next();
- let mut jt = it.clone();
- assert_eq!(it.next(), jt.next());
- assert_eq!(it.next_back(), jt.next_back());
- assert_eq!(it.next(), jt.next());
-}
-
-#[test]
-fn test_iterator_double_end() {
- let mut n = LinkedList::new();
- assert_eq!(n.iter().next(), None);
- n.push_front(4);
- n.push_front(5);
- n.push_front(6);
- let mut it = n.iter();
- assert_eq!(it.size_hint(), (3, Some(3)));
- assert_eq!(it.next().unwrap(), &6);
- assert_eq!(it.size_hint(), (2, Some(2)));
- assert_eq!(it.next_back().unwrap(), &4);
- assert_eq!(it.size_hint(), (1, Some(1)));
- assert_eq!(it.next_back().unwrap(), &5);
- assert_eq!(it.next_back(), None);
- assert_eq!(it.next(), None);
-}
-
-#[test]
-fn test_rev_iter() {
- let m = generate_test();
- for (i, elt) in m.iter().rev().enumerate() {
- assert_eq!((6 - i) as i32, *elt);
- }
- let mut n = LinkedList::new();
- assert_eq!(n.iter().rev().next(), None);
- n.push_front(4);
- let mut it = n.iter().rev();
- assert_eq!(it.size_hint(), (1, Some(1)));
- assert_eq!(it.next().unwrap(), &4);
- assert_eq!(it.size_hint(), (0, Some(0)));
- assert_eq!(it.next(), None);
-}
-
-#[test]
-fn test_mut_iter() {
- let mut m = generate_test();
- let mut len = m.len();
- for (i, elt) in m.iter_mut().enumerate() {
- assert_eq!(i as i32, *elt);
- len -= 1;
- }
- assert_eq!(len, 0);
- let mut n = LinkedList::new();
- assert!(n.iter_mut().next().is_none());
- n.push_front(4);
- n.push_back(5);
- let mut it = n.iter_mut();
- assert_eq!(it.size_hint(), (2, Some(2)));
- assert!(it.next().is_some());
- assert!(it.next().is_some());
- assert_eq!(it.size_hint(), (0, Some(0)));
- assert!(it.next().is_none());
-}
-
-#[test]
-fn test_iterator_mut_double_end() {
- let mut n = LinkedList::new();
- assert!(n.iter_mut().next_back().is_none());
- n.push_front(4);
- n.push_front(5);
- n.push_front(6);
- let mut it = n.iter_mut();
- assert_eq!(it.size_hint(), (3, Some(3)));
- assert_eq!(*it.next().unwrap(), 6);
- assert_eq!(it.size_hint(), (2, Some(2)));
- assert_eq!(*it.next_back().unwrap(), 4);
- assert_eq!(it.size_hint(), (1, Some(1)));
- assert_eq!(*it.next_back().unwrap(), 5);
- assert!(it.next_back().is_none());
- assert!(it.next().is_none());
-}
-
-#[test]
-fn test_mut_rev_iter() {
- let mut m = generate_test();
- for (i, elt) in m.iter_mut().rev().enumerate() {
- assert_eq!((6 - i) as i32, *elt);
- }
- let mut n = LinkedList::new();
- assert!(n.iter_mut().rev().next().is_none());
- n.push_front(4);
- let mut it = n.iter_mut().rev();
- assert!(it.next().is_some());
- assert!(it.next().is_none());
-}
-
-#[test]
-fn test_eq() {
- let mut n = list_from(&[]);
- let mut m = list_from(&[]);
- assert!(n == m);
- n.push_front(1);
- assert!(n != m);
- m.push_back(1);
- assert!(n == m);
-
- let n = list_from(&[2, 3, 4]);
- let m = list_from(&[1, 2, 3]);
- assert!(n != m);
-}
#[test]
fn test_hash() {
assert!(hash(&x) == hash(&y));
}
-
-#[test]
-fn test_ord() {
- let n = list_from(&[]);
- let m = list_from(&[1, 2, 3]);
- assert!(n < m);
- assert!(m > n);
- assert!(n <= n);
- assert!(n >= n);
-}
-
-#[test]
-fn test_ord_nan() {
- let nan = 0.0f64 / 0.0;
- let n = list_from(&[nan]);
- let m = list_from(&[nan]);
- assert!(!(n < m));
- assert!(!(n > m));
- assert!(!(n <= m));
- assert!(!(n >= m));
-
- let n = list_from(&[nan]);
- let one = list_from(&[1.0f64]);
- assert!(!(n < one));
- assert!(!(n > one));
- assert!(!(n <= one));
- assert!(!(n >= one));
-
- let u = list_from(&[1.0f64, 2.0, nan]);
- let v = list_from(&[1.0f64, 2.0, 3.0]);
- assert!(!(u < v));
- assert!(!(u > v));
- assert!(!(u <= v));
- assert!(!(u >= v));
-
- let s = list_from(&[1.0f64, 2.0, 4.0, 2.0]);
- let t = list_from(&[1.0f64, 2.0, 3.0, 2.0]);
- assert!(!(s < t));
- assert!(s > one);
- assert!(!(s <= one));
- assert!(s >= one);
-}
-
-#[test]
-fn test_show() {
- let list: LinkedList<_> = (0..10).collect();
- assert_eq!(format!("{list:?}"), "[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]");
-
- let list: LinkedList<_> = ["just", "one", "test", "more"].into_iter().collect();
- assert_eq!(format!("{list:?}"), "[\"just\", \"one\", \"test\", \"more\"]");
-}
-
-#[test]
-fn test_extend_ref() {
- let mut a = LinkedList::new();
- a.push_back(1);
-
- a.extend(&[2, 3, 4]);
-
- assert_eq!(a.len(), 4);
- assert_eq!(a, list_from(&[1, 2, 3, 4]));
-
- let mut b = LinkedList::new();
- b.push_back(5);
- b.push_back(6);
- a.extend(&b);
-
- assert_eq!(a.len(), 6);
- assert_eq!(a, list_from(&[1, 2, 3, 4, 5, 6]));
-}
-
-#[test]
-fn test_extend() {
- let mut a = LinkedList::new();
- a.push_back(1);
- a.extend(vec![2, 3, 4]); // uses iterator
-
- assert_eq!(a.len(), 4);
- assert!(a.iter().eq(&[1, 2, 3, 4]));
-
- let b: LinkedList<_> = [5, 6, 7].into_iter().collect();
- a.extend(b); // specializes to `append`
-
- assert_eq!(a.len(), 7);
- assert!(a.iter().eq(&[1, 2, 3, 4, 5, 6, 7]));
-}
-
-#[test]
-fn test_contains() {
- let mut l = LinkedList::new();
- l.extend(&[2, 3, 4]);
-
- assert!(l.contains(&3));
- assert!(!l.contains(&1));
-
- l.clear();
-
- assert!(!l.contains(&3));
-}
-
-#[test]
-fn drain_filter_empty() {
- let mut list: LinkedList<i32> = LinkedList::new();
-
- {
- let mut iter = list.drain_filter(|_| true);
- assert_eq!(iter.size_hint(), (0, Some(0)));
- assert_eq!(iter.next(), None);
- assert_eq!(iter.size_hint(), (0, Some(0)));
- assert_eq!(iter.next(), None);
- assert_eq!(iter.size_hint(), (0, Some(0)));
- }
-
- assert_eq!(list.len(), 0);
- assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![]);
-}
-
-#[test]
-fn drain_filter_zst() {
- let mut list: LinkedList<_> = [(), (), (), (), ()].into_iter().collect();
- let initial_len = list.len();
- let mut count = 0;
-
- {
- let mut iter = list.drain_filter(|_| true);
- assert_eq!(iter.size_hint(), (0, Some(initial_len)));
- while let Some(_) = iter.next() {
- count += 1;
- assert_eq!(iter.size_hint(), (0, Some(initial_len - count)));
- }
- assert_eq!(iter.size_hint(), (0, Some(0)));
- assert_eq!(iter.next(), None);
- assert_eq!(iter.size_hint(), (0, Some(0)));
- }
-
- assert_eq!(count, initial_len);
- assert_eq!(list.len(), 0);
- assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![]);
-}
-
-#[test]
-fn drain_filter_false() {
- let mut list: LinkedList<_> = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10].into_iter().collect();
-
- let initial_len = list.len();
- let mut count = 0;
-
- {
- let mut iter = list.drain_filter(|_| false);
- assert_eq!(iter.size_hint(), (0, Some(initial_len)));
- for _ in iter.by_ref() {
- count += 1;
- }
- assert_eq!(iter.size_hint(), (0, Some(0)));
- assert_eq!(iter.next(), None);
- assert_eq!(iter.size_hint(), (0, Some(0)));
- }
-
- assert_eq!(count, 0);
- assert_eq!(list.len(), initial_len);
- assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
-}
-
-#[test]
-fn drain_filter_true() {
- let mut list: LinkedList<_> = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10].into_iter().collect();
-
- let initial_len = list.len();
- let mut count = 0;
-
- {
- let mut iter = list.drain_filter(|_| true);
- assert_eq!(iter.size_hint(), (0, Some(initial_len)));
- while let Some(_) = iter.next() {
- count += 1;
- assert_eq!(iter.size_hint(), (0, Some(initial_len - count)));
- }
- assert_eq!(iter.size_hint(), (0, Some(0)));
- assert_eq!(iter.next(), None);
- assert_eq!(iter.size_hint(), (0, Some(0)));
- }
-
- assert_eq!(count, initial_len);
- assert_eq!(list.len(), 0);
- assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![]);
-}
-
-#[test]
-fn drain_filter_complex() {
- {
- // [+xxx++++++xxxxx++++x+x++]
- let mut list = [
- 1, 2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35, 36, 37,
- 39,
- ]
- .into_iter()
- .collect::<LinkedList<_>>();
-
- let removed = list.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
- assert_eq!(removed.len(), 10);
- assert_eq!(removed, vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]);
-
- assert_eq!(list.len(), 14);
- assert_eq!(
- list.into_iter().collect::<Vec<_>>(),
- vec![1, 7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35, 37, 39]
- );
- }
-
- {
- // [xxx++++++xxxxx++++x+x++]
- let mut list =
- [2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35, 36, 37, 39]
- .into_iter()
- .collect::<LinkedList<_>>();
-
- let removed = list.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
- assert_eq!(removed.len(), 10);
- assert_eq!(removed, vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]);
-
- assert_eq!(list.len(), 13);
- assert_eq!(
- list.into_iter().collect::<Vec<_>>(),
- vec![7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35, 37, 39]
- );
- }
-
- {
- // [xxx++++++xxxxx++++x+x]
- let mut list =
- [2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35, 36]
- .into_iter()
- .collect::<LinkedList<_>>();
-
- let removed = list.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
- assert_eq!(removed.len(), 10);
- assert_eq!(removed, vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]);
-
- assert_eq!(list.len(), 11);
- assert_eq!(
- list.into_iter().collect::<Vec<_>>(),
- vec![7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35]
- );
- }
-
- {
- // [xxxxxxxxxx+++++++++++]
- let mut list = [2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19]
- .into_iter()
- .collect::<LinkedList<_>>();
-
- let removed = list.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
- assert_eq!(removed.len(), 10);
- assert_eq!(removed, vec![2, 4, 6, 8, 10, 12, 14, 16, 18, 20]);
-
- assert_eq!(list.len(), 10);
- assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![1, 3, 5, 7, 9, 11, 13, 15, 17, 19]);
- }
-
- {
- // [+++++++++++xxxxxxxxxx]
- let mut list = [1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20]
- .into_iter()
- .collect::<LinkedList<_>>();
-
- let removed = list.drain_filter(|x| *x % 2 == 0).collect::<Vec<_>>();
- assert_eq!(removed.len(), 10);
- assert_eq!(removed, vec![2, 4, 6, 8, 10, 12, 14, 16, 18, 20]);
-
- assert_eq!(list.len(), 10);
- assert_eq!(list.into_iter().collect::<Vec<_>>(), vec![1, 3, 5, 7, 9, 11, 13, 15, 17, 19]);
- }
-}
-
-#[test]
-fn drain_filter_drop_panic_leak() {
- static mut DROPS: i32 = 0;
-
- struct D(bool);
-
- impl Drop for D {
- fn drop(&mut self) {
- unsafe {
- DROPS += 1;
- }
-
- if self.0 {
- panic!("panic in `drop`");
- }
- }
- }
-
- let mut q = LinkedList::new();
- q.push_back(D(false));
- q.push_back(D(false));
- q.push_back(D(false));
- q.push_back(D(false));
- q.push_back(D(false));
- q.push_front(D(false));
- q.push_front(D(true));
- q.push_front(D(false));
-
- catch_unwind(AssertUnwindSafe(|| drop(q.drain_filter(|_| true)))).ok();
-
- assert_eq!(unsafe { DROPS }, 8);
- assert!(q.is_empty());
-}
-
-#[test]
-fn drain_filter_pred_panic_leak() {
- static mut DROPS: i32 = 0;
-
- #[derive(Debug)]
- struct D(u32);
-
- impl Drop for D {
- fn drop(&mut self) {
- unsafe {
- DROPS += 1;
- }
- }
- }
-
- let mut q = LinkedList::new();
- q.push_back(D(3));
- q.push_back(D(4));
- q.push_back(D(5));
- q.push_back(D(6));
- q.push_back(D(7));
- q.push_front(D(2));
- q.push_front(D(1));
- q.push_front(D(0));
-
- catch_unwind(AssertUnwindSafe(|| {
- drop(q.drain_filter(|item| if item.0 >= 2 { panic!() } else { true }))
- }))
- .ok();
-
- assert_eq!(unsafe { DROPS }, 2); // 0 and 1
- assert_eq!(q.len(), 6);
-}
-
-#[test]
-fn test_drop() {
- static mut DROPS: i32 = 0;
- struct Elem;
- impl Drop for Elem {
- fn drop(&mut self) {
- unsafe {
- DROPS += 1;
- }
- }
- }
-
- let mut ring = LinkedList::new();
- ring.push_back(Elem);
- ring.push_front(Elem);
- ring.push_back(Elem);
- ring.push_front(Elem);
- drop(ring);
-
- assert_eq!(unsafe { DROPS }, 4);
-}
-
-#[test]
-fn test_drop_with_pop() {
- static mut DROPS: i32 = 0;
- struct Elem;
- impl Drop for Elem {
- fn drop(&mut self) {
- unsafe {
- DROPS += 1;
- }
- }
- }
-
- let mut ring = LinkedList::new();
- ring.push_back(Elem);
- ring.push_front(Elem);
- ring.push_back(Elem);
- ring.push_front(Elem);
-
- drop(ring.pop_back());
- drop(ring.pop_front());
- assert_eq!(unsafe { DROPS }, 2);
-
- drop(ring);
- assert_eq!(unsafe { DROPS }, 4);
-}
-
-#[test]
-fn test_drop_clear() {
- static mut DROPS: i32 = 0;
- struct Elem;
- impl Drop for Elem {
- fn drop(&mut self) {
- unsafe {
- DROPS += 1;
- }
- }
- }
-
- let mut ring = LinkedList::new();
- ring.push_back(Elem);
- ring.push_front(Elem);
- ring.push_back(Elem);
- ring.push_front(Elem);
- ring.clear();
- assert_eq!(unsafe { DROPS }, 4);
-
- drop(ring);
- assert_eq!(unsafe { DROPS }, 4);
-}
-
-#[test]
-fn test_drop_panic() {
- static mut DROPS: i32 = 0;
-
- struct D(bool);
-
- impl Drop for D {
- fn drop(&mut self) {
- unsafe {
- DROPS += 1;
- }
-
- if self.0 {
- panic!("panic in `drop`");
- }
- }
- }
-
- let mut q = LinkedList::new();
- q.push_back(D(false));
- q.push_back(D(false));
- q.push_back(D(false));
- q.push_back(D(false));
- q.push_back(D(false));
- q.push_front(D(false));
- q.push_front(D(false));
- q.push_front(D(true));
-
- catch_unwind(move || drop(q)).ok();
-
- assert_eq!(unsafe { DROPS }, 8);
-}
projects / rust.git / commitdiff