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#[macro_use]
extern crate generic_array;
use std::cell::Cell;
use std::ops::Drop;
use generic_array::GenericArray;
use generic_array::typenum::consts::U5;
#[test]
fn test_into_iter_as_slice() {
let array = arr![char; 'a', 'b', 'c'];
let mut into_iter = array.into_iter();
assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']);
let _ = into_iter.next().unwrap();
assert_eq!(into_iter.as_slice(), &['b', 'c']);
let _ = into_iter.next().unwrap();
let _ = into_iter.next().unwrap();
assert_eq!(into_iter.as_slice(), &[]);
}
#[test]
fn test_into_iter_as_mut_slice() {
let array = arr![char; 'a', 'b', 'c'];
let mut into_iter = array.into_iter();
assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']);
into_iter.as_mut_slice()[0] = 'x';
into_iter.as_mut_slice()[1] = 'y';
assert_eq!(into_iter.next().unwrap(), 'x');
assert_eq!(into_iter.as_slice(), &['y', 'c']);
}
#[test]
fn test_into_iter_debug() {
let array = arr![char; 'a', 'b', 'c'];
let into_iter = array.into_iter();
let debug = format!("{:?}", into_iter);
assert_eq!(debug, "GenericArrayIter(['a', 'b', 'c'])");
}
#[test]
fn test_into_iter_clone() {
fn iter_equal<I: Iterator<Item = i32>>(it: I, slice: &[i32]) {
let v: Vec<i32> = it.collect();
assert_eq!(&v[..], slice);
}
let mut it = arr![i32; 1, 2, 3].into_iter();
iter_equal(it.clone(), &[1, 2, 3]);
assert_eq!(it.next(), Some(1));
let mut it = it.rev();
iter_equal(it.clone(), &[3, 2]);
assert_eq!(it.next(), Some(3));
iter_equal(it.clone(), &[2]);
assert_eq!(it.next(), Some(2));
iter_equal(it.clone(), &[]);
assert_eq!(it.next(), None);
}
#[test]
fn test_into_iter_nth() {
let v = arr![i32; 0, 1, 2, 3, 4];
for i in 0..v.len() {
assert_eq!(v.clone().into_iter().nth(i).unwrap(), v[i]);
}
assert_eq!(v.clone().into_iter().nth(v.len()), None);
let mut iter = v.into_iter();
assert_eq!(iter.nth(2).unwrap(), v[2]);
assert_eq!(iter.nth(1).unwrap(), v[4]);
}
#[test]
fn test_into_iter_last() {
let v = arr![i32; 0, 1, 2, 3, 4];
assert_eq!(v.into_iter().last().unwrap(), 4);
assert_eq!(arr![i32; 0].into_iter().last().unwrap(), 0);
}
#[test]
fn test_into_iter_count() {
let v = arr![i32; 0, 1, 2, 3, 4];
assert_eq!(v.clone().into_iter().count(), 5);
let mut iter2 = v.into_iter();
iter2.next();
iter2.next();
assert_eq!(iter2.count(), 3);
}
#[test]
fn test_into_iter_flat_map() {
assert!((0..5).flat_map(|i| arr![i32; 2 * i, 2 * i + 1]).eq(0..10));
}
#[test]
fn test_into_iter_drops() {
struct R<'a> {
i: &'a Cell<usize>,
}
impl<'a> Drop for R<'a> {
fn drop(&mut self) {
self.i.set(self.i.get() + 1);
}
}
fn r(i: &Cell<usize>) -> R {
R {
i: i
}
}
fn v(i: &Cell<usize>) -> GenericArray<R, U5> {
arr![R; r(i), r(i), r(i), r(i), r(i)]
}
let i = Cell::new(0);
{
v(&i).into_iter();
}
assert_eq!(i.get(), 5);
let i = Cell::new(0);
{
let mut iter = v(&i).into_iter();
let _x = iter.next();
assert_eq!(i.get(), 0);
assert_eq!(iter.count(), 4);
assert_eq!(i.get(), 4);
}
assert_eq!(i.get(), 5);
let i = Cell::new(0);
{
let mut iter = v(&i).into_iter();
let _x = iter.nth(2);
assert_eq!(i.get(), 2);
let _y = iter.last();
assert_eq!(i.get(), 3);
}
assert_eq!(i.get(), 5);
let i = Cell::new(0);
for (index, _x) in v(&i).into_iter().enumerate() {
assert_eq!(i.get(), index);
}
assert_eq!(i.get(), 5);
let i = Cell::new(0);
for (index, _x) in v(&i).into_iter().rev().enumerate() {
assert_eq!(i.get(), index);
}
assert_eq!(i.get(), 5);
}
/*
//TODO: Cover this
#[allow(dead_code)]
fn assert_covariance() {
fn into_iter<'new>(i: GenericArrayIter<&'static str, U10>) -> GenericArrayIter<&'new str, U10> {
i
}
}
*/
|
