1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 use std::ascii::AsciiExt;
13 use std::mem::size_of;
15 use std::vec::{Drain, IntoIter};
17 struct DropCounter<'a> {
21 impl<'a> Drop for DropCounter<'a> {
28 fn test_small_vec_struct() {
29 assert!(size_of::<Vec<u8>>() == size_of::<usize>() * 3);
33 fn test_double_drop() {
39 let (mut count_x, mut count_y) = (0, 0);
45 tv.x.push(DropCounter { count: &mut count_x });
46 tv.y.push(DropCounter { count: &mut count_y });
48 // If Vec had a drop flag, here is where it would be zeroed.
49 // Instead, it should rely on its internal state to prevent
50 // doing anything significant when dropped multiple times.
53 // Here tv goes out of scope, tv.y should be dropped, but not tv.x.
56 assert_eq!(count_x, 1);
57 assert_eq!(count_y, 1);
62 let mut v = Vec::new();
63 assert_eq!(v.capacity(), 0);
66 assert!(v.capacity() >= 2);
72 assert!(v.capacity() >= 16);
74 assert!(v.capacity() >= 32);
79 assert!(v.capacity() >= 33)
84 let mut v = Vec::new();
85 let mut w = Vec::new();
104 v.extend(w.clone()); // specializes to `append`
105 assert!(v.iter().eq(w.iter().chain(w.iter())));
108 #[derive(PartialEq, Debug)]
111 let mut a = Vec::new();
112 let b = vec![Foo, Foo];
115 assert_eq!(a, &[Foo, Foo]);
120 let mut x = Vec::new();
121 let y = vec![DropCounter { count: &mut count_x }];
124 assert_eq!(count_x, 1);
128 fn test_extend_ref() {
129 let mut v = vec![1, 2];
130 v.extend(&[3, 4, 5]);
132 assert_eq!(v.len(), 5);
133 assert_eq!(v, [1, 2, 3, 4, 5]);
138 assert_eq!(v.len(), 7);
139 assert_eq!(v, [1, 2, 3, 4, 5, 6, 7]);
143 fn test_slice_from_mut() {
144 let mut values = vec![1, 2, 3, 4, 5];
146 let slice = &mut values[2..];
147 assert!(slice == [3, 4, 5]);
153 assert!(values == [1, 2, 5, 6, 7]);
157 fn test_slice_to_mut() {
158 let mut values = vec![1, 2, 3, 4, 5];
160 let slice = &mut values[..2];
161 assert!(slice == [1, 2]);
167 assert!(values == [2, 3, 3, 4, 5]);
171 fn test_split_at_mut() {
172 let mut values = vec![1, 2, 3, 4, 5];
174 let (left, right) = values.split_at_mut(2);
176 let left: &[_] = left;
177 assert!(&left[..left.len()] == &[1, 2]);
184 let right: &[_] = right;
185 assert!(&right[..right.len()] == &[3, 4, 5]);
192 assert_eq!(values, [2, 3, 5, 6, 7]);
197 let v: Vec<i32> = vec![];
198 let w = vec![1, 2, 3];
200 assert_eq!(v, v.clone());
204 // they should be disjoint in memory.
205 assert!(w.as_ptr() != z.as_ptr())
209 fn test_clone_from() {
211 let three: Vec<Box<_>> = vec![box 1, box 2, box 3];
212 let two: Vec<Box<_>> = vec![box 4, box 5];
214 v.clone_from(&three);
215 assert_eq!(v, three);
218 v.clone_from(&three);
219 assert_eq!(v, three);
226 v.clone_from(&three);
232 let mut vec = vec![1, 2, 3, 4];
233 vec.retain(|&x| x % 2 == 0);
234 assert_eq!(vec, [2, 4]);
239 fn case(a: Vec<i32>, b: Vec<i32>) {
244 case(vec![], vec![]);
245 case(vec![1], vec![1]);
246 case(vec![1, 1], vec![1]);
247 case(vec![1, 2, 3], vec![1, 2, 3]);
248 case(vec![1, 1, 2, 3], vec![1, 2, 3]);
249 case(vec![1, 2, 2, 3], vec![1, 2, 3]);
250 case(vec![1, 2, 3, 3], vec![1, 2, 3]);
251 case(vec![1, 1, 2, 2, 2, 3, 3], vec![1, 2, 3]);
255 fn test_dedup_by_key() {
256 fn case(a: Vec<i32>, b: Vec<i32>) {
258 v.dedup_by_key(|i| *i / 10);
261 case(vec![], vec![]);
262 case(vec![10], vec![10]);
263 case(vec![10, 11], vec![10]);
264 case(vec![10, 20, 30], vec![10, 20, 30]);
265 case(vec![10, 11, 20, 30], vec![10, 20, 30]);
266 case(vec![10, 20, 21, 30], vec![10, 20, 30]);
267 case(vec![10, 20, 30, 31], vec![10, 20, 30]);
268 case(vec![10, 11, 20, 21, 22, 30, 31], vec![10, 20, 30]);
273 let mut vec = vec!["foo", "bar", "Bar", "baz", "bar"];
274 vec.dedup_by(|a, b| a.eq_ignore_ascii_case(b));
276 assert_eq!(vec, ["foo", "bar", "baz", "bar"]);
280 fn test_dedup_unique() {
281 let mut v0: Vec<Box<_>> = vec![box 1, box 1, box 2, box 3];
283 let mut v1: Vec<Box<_>> = vec![box 1, box 2, box 2, box 3];
285 let mut v2: Vec<Box<_>> = vec![box 1, box 2, box 3, box 3];
287 // If the boxed pointers were leaked or otherwise misused, valgrind
288 // and/or rt should raise errors.
292 fn zero_sized_values() {
293 let mut v = Vec::new();
294 assert_eq!(v.len(), 0);
296 assert_eq!(v.len(), 1);
298 assert_eq!(v.len(), 2);
299 assert_eq!(v.pop(), Some(()));
300 assert_eq!(v.pop(), Some(()));
301 assert_eq!(v.pop(), None);
303 assert_eq!(v.iter().count(), 0);
305 assert_eq!(v.iter().count(), 1);
307 assert_eq!(v.iter().count(), 2);
311 assert_eq!(v.iter_mut().count(), 2);
313 assert_eq!(v.iter_mut().count(), 3);
315 assert_eq!(v.iter_mut().count(), 4);
317 for &mut () in &mut v {}
321 assert_eq!(v.iter_mut().count(), 0);
325 fn test_partition() {
326 assert_eq!(vec![].into_iter().partition(|x: &i32| *x < 3),
328 assert_eq!(vec![1, 2, 3].into_iter().partition(|x| *x < 4),
329 (vec![1, 2, 3], vec![]));
330 assert_eq!(vec![1, 2, 3].into_iter().partition(|x| *x < 2),
331 (vec![1], vec![2, 3]));
332 assert_eq!(vec![1, 2, 3].into_iter().partition(|x| *x < 0),
333 (vec![], vec![1, 2, 3]));
337 fn test_zip_unzip() {
338 let z1 = vec![(1, 4), (2, 5), (3, 6)];
340 let (left, right): (Vec<_>, Vec<_>) = z1.iter().cloned().unzip();
342 assert_eq!((1, 4), (left[0], right[0]));
343 assert_eq!((2, 5), (left[1], right[1]));
344 assert_eq!((3, 6), (left[2], right[2]));
348 fn test_vec_truncate_drop() {
349 static mut DROPS: u32 = 0;
359 let mut v = vec![Elem(1), Elem(2), Elem(3), Elem(4), Elem(5)];
360 assert_eq!(unsafe { DROPS }, 0);
362 assert_eq!(unsafe { DROPS }, 2);
364 assert_eq!(unsafe { DROPS }, 5);
369 fn test_vec_truncate_fail() {
371 impl Drop for BadElem {
373 let BadElem(ref mut x) = *self;
375 panic!("BadElem panic: 0xbadbeef")
380 let mut v = vec![BadElem(1), BadElem(2), BadElem(0xbadbeef), BadElem(4)];
386 let vec = vec![1, 2, 3];
387 assert!(vec[1] == 2);
392 fn test_index_out_of_bounds() {
393 let vec = vec![1, 2, 3];
399 fn test_slice_out_of_bounds_1() {
400 let x = vec![1, 2, 3, 4, 5];
406 fn test_slice_out_of_bounds_2() {
407 let x = vec![1, 2, 3, 4, 5];
413 fn test_slice_out_of_bounds_3() {
414 let x = vec![1, 2, 3, 4, 5];
420 fn test_slice_out_of_bounds_4() {
421 let x = vec![1, 2, 3, 4, 5];
427 fn test_slice_out_of_bounds_5() {
428 let x = vec![1, 2, 3, 4, 5];
434 fn test_swap_remove_empty() {
435 let mut vec = Vec::<i32>::new();
440 fn test_move_items() {
441 let vec = vec![1, 2, 3];
442 let mut vec2 = vec![];
446 assert_eq!(vec2, [1, 2, 3]);
450 fn test_move_items_reverse() {
451 let vec = vec![1, 2, 3];
452 let mut vec2 = vec![];
453 for i in vec.into_iter().rev() {
456 assert_eq!(vec2, [3, 2, 1]);
460 fn test_move_items_zero_sized() {
461 let vec = vec![(), (), ()];
462 let mut vec2 = vec![];
466 assert_eq!(vec2, [(), (), ()]);
470 fn test_drain_items() {
471 let mut vec = vec![1, 2, 3];
472 let mut vec2 = vec![];
473 for i in vec.drain(..) {
477 assert_eq!(vec2, [1, 2, 3]);
481 fn test_drain_items_reverse() {
482 let mut vec = vec![1, 2, 3];
483 let mut vec2 = vec![];
484 for i in vec.drain(..).rev() {
488 assert_eq!(vec2, [3, 2, 1]);
492 fn test_drain_items_zero_sized() {
493 let mut vec = vec![(), (), ()];
494 let mut vec2 = vec![];
495 for i in vec.drain(..) {
499 assert_eq!(vec2, [(), (), ()]);
504 fn test_drain_out_of_bounds() {
505 let mut v = vec![1, 2, 3, 4, 5];
510 fn test_drain_range() {
511 let mut v = vec![1, 2, 3, 4, 5];
512 for _ in v.drain(4..) {
514 assert_eq!(v, &[1, 2, 3, 4]);
516 let mut v: Vec<_> = (1..6).map(|x| x.to_string()).collect();
517 for _ in v.drain(1..4) {
519 assert_eq!(v, &[1.to_string(), 5.to_string()]);
521 let mut v: Vec<_> = (1..6).map(|x| x.to_string()).collect();
522 for _ in v.drain(1..4).rev() {
524 assert_eq!(v, &[1.to_string(), 5.to_string()]);
526 let mut v: Vec<_> = vec![(); 5];
527 for _ in v.drain(1..4).rev() {
529 assert_eq!(v, &[(), ()]);
533 fn test_drain_inclusive_range() {
534 let mut v = vec!['a', 'b', 'c', 'd', 'e'];
535 for _ in v.drain(1...3) {
537 assert_eq!(v, &['a', 'e']);
539 let mut v: Vec<_> = (0...5).map(|x| x.to_string()).collect();
540 for _ in v.drain(1...5) {
542 assert_eq!(v, &["0".to_string()]);
544 let mut v: Vec<String> = (0...5).map(|x| x.to_string()).collect();
545 for _ in v.drain(0...5) {
547 assert_eq!(v, Vec::<String>::new());
549 let mut v: Vec<_> = (0...5).map(|x| x.to_string()).collect();
550 for _ in v.drain(0...3) {
552 assert_eq!(v, &["4".to_string(), "5".to_string()]);
554 let mut v: Vec<_> = (0...1).map(|x| x.to_string()).collect();
555 for _ in v.drain(...0) {
557 assert_eq!(v, &["1".to_string()]);
561 fn test_drain_max_vec_size() {
562 let mut v = Vec::<()>::with_capacity(usize::max_value());
563 unsafe { v.set_len(usize::max_value()); }
564 for _ in v.drain(usize::max_value() - 1..) {
566 assert_eq!(v.len(), usize::max_value() - 1);
568 let mut v = Vec::<()>::with_capacity(usize::max_value());
569 unsafe { v.set_len(usize::max_value()); }
570 for _ in v.drain(usize::max_value() - 1...usize::max_value() - 1) {
572 assert_eq!(v.len(), usize::max_value() - 1);
577 fn test_drain_inclusive_out_of_bounds() {
578 let mut v = vec![1, 2, 3, 4, 5];
584 let mut v = vec![1, 2, 3, 4, 5];
585 let a = [10, 11, 12];
586 v.splice(2..4, a.iter().cloned());
587 assert_eq!(v, &[1, 2, 10, 11, 12, 5]);
588 v.splice(1..3, Some(20));
589 assert_eq!(v, &[1, 20, 11, 12, 5]);
593 fn test_splice_inclusive_range() {
594 let mut v = vec![1, 2, 3, 4, 5];
595 let a = [10, 11, 12];
596 let t1: Vec<_> = v.splice(2...3, a.iter().cloned()).collect();
597 assert_eq!(v, &[1, 2, 10, 11, 12, 5]);
598 assert_eq!(t1, &[3, 4]);
599 let t2: Vec<_> = v.splice(1...2, Some(20)).collect();
600 assert_eq!(v, &[1, 20, 11, 12, 5]);
601 assert_eq!(t2, &[2, 10]);
606 fn test_splice_out_of_bounds() {
607 let mut v = vec![1, 2, 3, 4, 5];
608 let a = [10, 11, 12];
609 v.splice(5..6, a.iter().cloned());
614 fn test_splice_inclusive_out_of_bounds() {
615 let mut v = vec![1, 2, 3, 4, 5];
616 let a = [10, 11, 12];
617 v.splice(5...5, a.iter().cloned());
621 fn test_splice_items_zero_sized() {
622 let mut vec = vec![(), (), ()];
624 let t: Vec<_> = vec.splice(1..2, vec2.iter().cloned()).collect();
625 assert_eq!(vec, &[(), ()]);
626 assert_eq!(t, &[()]);
630 fn test_splice_unbounded() {
631 let mut vec = vec![1, 2, 3, 4, 5];
632 let t: Vec<_> = vec.splice(.., None).collect();
633 assert_eq!(vec, &[]);
634 assert_eq!(t, &[1, 2, 3, 4, 5]);
638 fn test_splice_forget() {
639 let mut v = vec![1, 2, 3, 4, 5];
640 let a = [10, 11, 12];
641 ::std::mem::forget(v.splice(2..4, a.iter().cloned()));
642 assert_eq!(v, &[1, 2]);
646 fn test_into_boxed_slice() {
647 let xs = vec![1, 2, 3];
648 let ys = xs.into_boxed_slice();
649 assert_eq!(&*ys, [1, 2, 3]);
654 let mut vec = vec![1, 2, 3];
655 let mut vec2 = vec![4, 5, 6];
656 vec.append(&mut vec2);
657 assert_eq!(vec, [1, 2, 3, 4, 5, 6]);
658 assert_eq!(vec2, []);
662 fn test_split_off() {
663 let mut vec = vec![1, 2, 3, 4, 5, 6];
664 let vec2 = vec.split_off(4);
665 assert_eq!(vec, [1, 2, 3, 4]);
666 assert_eq!(vec2, [5, 6]);
670 fn test_into_iter_as_slice() {
671 let vec = vec!['a', 'b', 'c'];
672 let mut into_iter = vec.into_iter();
673 assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']);
674 let _ = into_iter.next().unwrap();
675 assert_eq!(into_iter.as_slice(), &['b', 'c']);
676 let _ = into_iter.next().unwrap();
677 let _ = into_iter.next().unwrap();
678 assert_eq!(into_iter.as_slice(), &[]);
682 fn test_into_iter_as_mut_slice() {
683 let vec = vec!['a', 'b', 'c'];
684 let mut into_iter = vec.into_iter();
685 assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']);
686 into_iter.as_mut_slice()[0] = 'x';
687 into_iter.as_mut_slice()[1] = 'y';
688 assert_eq!(into_iter.next().unwrap(), 'x');
689 assert_eq!(into_iter.as_slice(), &['y', 'c']);
693 fn test_into_iter_debug() {
694 let vec = vec!['a', 'b', 'c'];
695 let into_iter = vec.into_iter();
696 let debug = format!("{:?}", into_iter);
697 assert_eq!(debug, "IntoIter(['a', 'b', 'c'])");
701 fn test_into_iter_count() {
702 assert_eq!(vec![1, 2, 3].into_iter().count(), 3);
706 fn test_into_iter_clone() {
707 fn iter_equal<I: Iterator<Item = i32>>(it: I, slice: &[i32]) {
708 let v: Vec<i32> = it.collect();
709 assert_eq!(&v[..], slice);
711 let mut it = vec![1, 2, 3].into_iter();
712 iter_equal(it.clone(), &[1, 2, 3]);
713 assert_eq!(it.next(), Some(1));
714 let mut it = it.rev();
715 iter_equal(it.clone(), &[3, 2]);
716 assert_eq!(it.next(), Some(3));
717 iter_equal(it.clone(), &[2]);
718 assert_eq!(it.next(), Some(2));
719 iter_equal(it.clone(), &[]);
720 assert_eq!(it.next(), None);
725 let borrowed: &[_] = &["borrowed", "(slice)"];
726 let owned = vec!["owned", "(vec)"];
727 match (Cow::from(owned.clone()), Cow::from(borrowed)) {
728 (Cow::Owned(o), Cow::Borrowed(b)) => assert!(o == owned && b == borrowed),
729 _ => panic!("invalid `Cow::from`"),
735 let borrowed: &[_] = &["borrowed", "(slice)"];
736 let owned = vec!["owned", "(vec)"];
737 assert_eq!(Vec::from(Cow::Borrowed(borrowed)), vec!["borrowed", "(slice)"]);
738 assert_eq!(Vec::from(Cow::Owned(owned)), vec!["owned", "(vec)"]);
742 fn assert_covariance() {
743 fn drain<'new>(d: Drain<'static, &'static str>) -> Drain<'new, &'new str> {
746 fn into_iter<'new>(i: IntoIter<&'static str>) -> IntoIter<&'new str> {
752 fn test_placement() {
753 let mut vec = vec![1];
754 assert_eq!(vec.place_back() <- 2, &2);
755 assert_eq!(vec.len(), 2);
756 assert_eq!(vec.place_back() <- 3, &3);
757 assert_eq!(vec.len(), 3);
758 assert_eq!(&vec, &[1, 2, 3]);
762 fn test_placement_panic() {
763 let mut vec = vec![1, 2, 3];
764 fn mkpanic() -> usize { panic!() }
765 let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { vec.place_back() <- mkpanic(); }));
766 assert_eq!(vec.len(), 3);
770 fn from_into_inner() {
771 let vec = vec![1, 2, 3];
772 let ptr = vec.as_ptr();
773 let vec = vec.into_iter().collect::<Vec<_>>();
774 assert_eq!(vec, [1, 2, 3]);
775 assert_eq!(vec.as_ptr(), ptr);
777 let ptr = &vec[1] as *const _;
778 let mut it = vec.into_iter();
780 let vec = it.collect::<Vec<_>>();
781 assert_eq!(vec, [2, 3]);
782 assert!(ptr != vec.as_ptr());
786 fn overaligned_allocations() {
789 let mut v = vec![Foo(273)];
792 assert!(v[0].0 == 273);
793 assert!(v.as_ptr() as usize & 0xff == 0);
795 assert!(v[0].0 == 273);
796 assert!(v.as_ptr() as usize & 0xff == 0);