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@ -289,7 +289,7 @@ pub struct Drain<'a, T: 'a> {
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impl<'a, T> Iterator for Drain<'a, T> {
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type Item = T;
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fn next(&mut self) -> Option<T> { self.iter.next_back() }
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fn next(&mut self) -> Option<T> { self.iter.next() }
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fn size_hint(&self) -> (usize, Option<usize>) { self.iter.size_hint() }
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}
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@ -304,5 +304,77 @@ impl<'a, T> Drop for Drain<'a, T> {
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}
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}
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# fn main() {}
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# fn main() {
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# tests::create_push_pop();
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# tests::iter_test();
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# tests::test_drain();
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# tests::test_zst();
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# println!("All tests finished OK");
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# }
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# mod tests {
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# use super::*;
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# pub fn create_push_pop() {
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# let mut v = Vec::new();
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# v.push(1);
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# assert_eq!(1, v.len());
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# assert_eq!(1, v[0]);
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# for i in v.iter_mut() {
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# *i += 1;
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# }
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# v.insert(0, 5);
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# let x = v.pop();
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# assert_eq!(Some(2), x);
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# assert_eq!(1, v.len());
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# v.push(10);
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# let x = v.remove(0);
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# assert_eq!(5, x);
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# assert_eq!(1, v.len());
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# }
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#
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# pub fn iter_test() {
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# let mut v = Vec::new();
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# for i in 0..10 {
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# v.push(Box::new(i))
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# }
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# let mut iter = v.into_iter();
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# let first = iter.next().unwrap();
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# let last = iter.next_back().unwrap();
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# drop(iter);
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# assert_eq!(0, *first);
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# assert_eq!(9, *last);
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# }
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#
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# pub fn test_drain() {
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# let mut v = Vec::new();
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# for i in 0..10 {
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# v.push(Box::new(i))
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# }
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# {
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# let mut drain = v.drain();
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# let first = drain.next().unwrap();
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# let last = drain.next_back().unwrap();
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# assert_eq!(0, *first);
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# assert_eq!(9, *last);
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# }
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# assert_eq!(0, v.len());
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# v.push(Box::new(1));
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# assert_eq!(1, *v.pop().unwrap());
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# }
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#
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# pub fn test_zst() {
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# let mut v = Vec::new();
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# for _i in 0..10 {
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# v.push(())
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# }
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#
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# let mut count = 0;
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#
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# for _ in v.into_iter() {
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# count += 1
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# }
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#
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# assert_eq!(10, count);
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# }
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# }
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```
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