#[macro_use(s)]
extern crate ndarray;
extern crate itertools;
use ndarray::RcArray;
use ndarray::{Ix, Si, S};
use ndarray::{
ArrayBase,
Data,
Dimension,
aview1,
arr2,
arr3,
Axis,
Indexes,
};
use itertools::assert_equal;
use itertools::{rev, enumerate};
#[test]
fn double_ended() {
let a = RcArray::linspace(0., 7., 8);
let mut it = a.iter().map(|x| *x);
assert_eq!(it.next(), Some(0.));
assert_eq!(it.next_back(), Some(7.));
assert_eq!(it.next(), Some(1.));
assert_eq!(it.rev().last(), Some(2.));
assert_equal(aview1(&[1, 2, 3]), &[1, 2, 3]);
assert_equal(rev(aview1(&[1, 2, 3])), rev(&[1, 2, 3]));
}
#[test]
fn iter_size_hint() {
let a = RcArray::from_iter(0..24).reshape((2, 3, 4));
let mut data = [0; 24];
for (i, elt) in enumerate(&mut data) {
*elt = i as i32;
}
assert_equal(&a, &data);
let mut it = a.iter();
let mut ans = data.iter();
assert_eq!(it.len(), ans.len());
while ans.len() > 0 {
assert_eq!(it.next(), ans.next());
assert_eq!(it.len(), ans.len());
}
}
#[test]
fn indexed()
{
let a = RcArray::linspace(0., 7., 8);
for (i, elt) in a.indexed_iter() {
assert_eq!(i, *elt as Ix);
}
let a = a.reshape((2, 4, 1));
let (mut i, mut j, k) = (0, 0, 0);
for (idx, elt) in a.indexed_iter() {
assert_eq!(idx, (i, j, k));
j += 1;
if j == 4 {
j = 0;
i += 1;
}
println!("{:?}", (idx, elt));
}
}
fn assert_slice_correct<A, S, D>(v: &ArrayBase<S, D>)
where S: Data<Elem=A>,
D: Dimension,
A: PartialEq + std::fmt::Debug,
{
let slc = v.as_slice();
assert!(slc.is_some());
let slc = slc.unwrap();
assert_eq!(v.len(), slc.len());
assert_equal(v.iter(), slc);
}
#[test]
fn as_slice() {
let a = RcArray::linspace(0., 7., 8);
let a = a.reshape((2, 4, 1));
assert_slice_correct(&a);
let a = a.reshape((2, 4));
assert_slice_correct(&a);
assert!(a.view().subview(Axis(1), 0).as_slice().is_none());
let v = a.view();
assert_slice_correct(&v);
assert_slice_correct(&v.subview(Axis(0), 0));
assert_slice_correct(&v.subview(Axis(0), 1));
assert!(v.slice(&[S, Si(0, Some(1), 1)]).as_slice().is_none());
println!("{:?}", v.slice(&[Si(0, Some(1), 2), S]));
assert!(v.slice(&[Si(0, Some(1), 2), S]).as_slice().is_some());
let u = v.slice(&[Si(0, Some(1), 2), S]);
println!("{:?}", u.shape());
println!("{:?}", u.strides());
println!("{:?}", v.slice(&[Si(0, Some(1), 2), S]));
assert!(u.as_slice().is_some());
assert_slice_correct(&u);
let a = a.reshape((8, 1));
assert_slice_correct(&a);
let u = a.slice(&[Si(0, None, 2), S]);
println!("u={:?}, shape={:?}, strides={:?}", u, u.shape(), u.strides());
assert!(u.as_slice().is_none());
}
#[test]
fn inner_iter() {
let a = RcArray::from_iter(0..12);
let a = a.reshape((2, 3, 2));
assert_equal(a.inner_iter(),
vec![aview1(&[0, 1]), aview1(&[2, 3]), aview1(&[4, 5]),
aview1(&[6, 7]), aview1(&[8, 9]), aview1(&[10, 11])]);
let mut b = RcArray::zeros((2, 3, 2));
b.swap_axes(0, 2);
b.assign(&a);
assert_equal(b.inner_iter(),
vec![aview1(&[0, 1]), aview1(&[2, 3]), aview1(&[4, 5]),
aview1(&[6, 7]), aview1(&[8, 9]), aview1(&[10, 11])]);
}
#[test]
fn inner_iter_corner_cases() {
let a0 = RcArray::zeros(());
assert_equal(a0.inner_iter(), vec![aview1(&[0])]);
let a2 = RcArray::<i32, _>::zeros((0, 3));
assert_equal(a2.inner_iter(),
vec![aview1(&[]); 0]);
let a2 = RcArray::<i32, _>::zeros((3, 0));
assert_equal(a2.inner_iter(),
vec![aview1(&[]); 3]);
}
#[test]
fn inner_iter_size_hint() {
let a = RcArray::from_iter(0..24).reshape((2, 3, 4));
let mut len = 6;
let mut it = a.inner_iter();
assert_eq!(it.len(), len);
while len > 0 {
it.next();
len -= 1;
assert_eq!(it.len(), len);
}
}
#[allow(deprecated)] #[test]
fn outer_iter() {
let a = RcArray::from_iter(0..12);
let a = a.reshape((2, 3, 2));
assert_equal(a.outer_iter(),
vec![a.subview(Axis(0), 0), a.subview(Axis(0), 1)]);
let mut b = RcArray::zeros((2, 3, 2));
b.swap_axes(0, 2);
b.assign(&a);
assert_equal(b.outer_iter(),
vec![a.subview(Axis(0), 0), a.subview(Axis(0), 1)]);
let mut found_rows = Vec::new();
for sub in b.outer_iter() {
for row in sub.into_outer_iter() {
found_rows.push(row);
}
}
assert_equal(a.inner_iter(), found_rows.clone());
let mut found_rows_rev = Vec::new();
for sub in b.outer_iter().rev() {
for row in sub.into_outer_iter().rev() {
found_rows_rev.push(row);
}
}
found_rows_rev.reverse();
assert_eq!(&found_rows, &found_rows_rev);
let mut c = RcArray::zeros((2, 3, 2));
let mut cv = c.slice_mut(s![..;-1, ..;-1, ..;-1]);
cv.assign(&a);
assert_eq!(&a, &cv);
assert_equal(cv.outer_iter(),
vec![a.subview(Axis(0), 0), a.subview(Axis(0), 1)]);
let mut found_rows = Vec::new();
for sub in cv.outer_iter() {
for row in sub.into_outer_iter() {
found_rows.push(row);
}
}
println!("{:#?}", found_rows);
assert_equal(a.inner_iter(), found_rows);
}
#[test]
fn axis_iter() {
let a = RcArray::from_iter(0..12);
let a = a.reshape((2, 3, 2));
assert_equal(a.axis_iter(Axis(1)),
vec![a.subview(Axis(1), 0),
a.subview(Axis(1), 1),
a.subview(Axis(1), 2)]);
}
#[test]
fn outer_iter_corner_cases() {
let a2 = RcArray::<i32, _>::zeros((0, 3));
assert_equal(a2.outer_iter(),
vec![aview1(&[]); 0]);
let a2 = RcArray::<i32, _>::zeros((3, 0));
assert_equal(a2.outer_iter(),
vec![aview1(&[]); 3]);
}
#[allow(deprecated)]
#[test]
fn outer_iter_mut() {
let a = RcArray::from_iter(0..12);
let a = a.reshape((2, 3, 2));
let mut b = RcArray::zeros((2, 3, 2));
b.swap_axes(0, 2);
b.assign(&a);
assert_equal(b.outer_iter_mut(),
vec![a.subview(Axis(0), 0), a.subview(Axis(0), 1)]);
let mut found_rows = Vec::new();
for sub in b.outer_iter_mut() {
for row in sub.into_outer_iter() {
found_rows.push(row);
}
}
assert_equal(a.inner_iter(), found_rows);
}
#[test]
fn axis_iter_mut() {
let a = RcArray::from_iter(0..12);
let a = a.reshape((2, 3, 2));
let mut a = a.to_owned();
for mut subview in a.axis_iter_mut(Axis(1)) {
subview[[0, 0]] = 42;
}
let b = arr3(&[[[42, 1],
[42, 3],
[42, 5]],
[[6, 7],
[8, 9],
[10, 11]]]);
assert_eq!(a, b);
}
#[test]
fn axis_chunks_iter() {
let a = RcArray::from_iter(0..24);
let a = a.reshape((2, 6, 2));
let it = a.axis_chunks_iter(Axis(1), 2);
assert_equal(it,
vec![arr3(&[[[0, 1], [2, 3]], [[12, 13], [14, 15]]]),
arr3(&[[[4, 5], [6, 7]], [[16, 17], [18, 19]]]),
arr3(&[[[8, 9], [10, 11]], [[20, 21], [22, 23]]])]);
let a = RcArray::from_iter(0..28);
let a = a.reshape((2, 7, 2));
let it = a.axis_chunks_iter(Axis(1), 2);
assert_equal(it,
vec![arr3(&[[[0, 1], [2, 3]], [[14, 15], [16, 17]]]),
arr3(&[[[4, 5], [6, 7]], [[18, 19], [20, 21]]]),
arr3(&[[[8, 9], [10, 11]], [[22, 23], [24, 25]]]),
arr3(&[[[12, 13]], [[26, 27]]])]);
let it = a.axis_chunks_iter(Axis(1), 2).rev();
assert_equal(it,
vec![arr3(&[[[12, 13]], [[26, 27]]]),
arr3(&[[[8, 9], [10, 11]], [[22, 23], [24, 25]]]),
arr3(&[[[4, 5], [6, 7]], [[18, 19], [20, 21]]]),
arr3(&[[[0, 1], [2, 3]], [[14, 15], [16, 17]]])]);
let it = a.axis_chunks_iter(Axis(1), 7);
assert_equal(it, vec![a.view()]);
let it = a.axis_chunks_iter(Axis(1), 9);
assert_equal(it, vec![a.view()]);
}
#[test]
fn axis_chunks_iter_corner_cases() {
let a = RcArray::<f32, _>::linspace(0., 7., 8).reshape((8, 1));
let it = a.axis_chunks_iter(Axis(0), 4);
assert_equal(it, vec![a.slice(s![..4, ..]), a.slice(s![4.., ..])]);
let a = a.slice(s![..;-1,..]);
let it = a.axis_chunks_iter(Axis(0), 8);
assert_equal(it, vec![a.view()]);
let it = a.axis_chunks_iter(Axis(0), 3);
assert_equal(it,
vec![arr2(&[[7.], [6.], [5.]]),
arr2(&[[4.], [3.], [2.]]),
arr2(&[[1.], [0.]])]);
let b = RcArray::<f32, _>::zeros((8, 2));
let a = b.slice(s![1..;2,..]);
let it = a.axis_chunks_iter(Axis(0), 8);
assert_equal(it, vec![a.view()]);
let it = a.axis_chunks_iter(Axis(0), 1);
assert_equal(it, vec![RcArray::zeros((1, 2)); 4]);
}
#[test]
fn axis_chunks_iter_mut() {
let a = RcArray::from_iter(0..24);
let mut a = a.reshape((2, 6, 2));
let mut it = a.axis_chunks_iter_mut(Axis(1), 2);
let mut col0 = it.next().unwrap();
col0[[0, 0, 0]] = 42;
assert_eq!(col0, arr3(&[[[42, 1], [2, 3]], [[12, 13], [14, 15]]]));
}
#[test]
fn outer_iter_size_hint() {
let a = RcArray::from_iter(0..24).reshape((4, 3, 2));
let mut len = 4;
let mut it = a.outer_iter();
assert_eq!(it.len(), len);
while len > 0 {
it.next();
len -= 1;
assert_eq!(it.len(), len);
}
let mut it = a.outer_iter();
it.next_back();
let mut len = 3;
while len > 0 {
it.next();
len -= 1;
assert_eq!(it.len(), len);
}
let mut it = a.outer_iter();
it.next();
let mut len = 3;
while len > 0 {
it.next_back();
len -= 1;
assert_eq!(it.len(), len);
}
}
#[test]
fn outer_iter_split_at() {
let a = RcArray::from_iter(0..30).reshape((5, 3, 2));
let it = a.outer_iter();
let (mut itl, mut itr) = it.clone().split_at(2);
assert_eq!(itl.next().unwrap()[[2, 1]], 5);
assert_eq!(itl.next().unwrap()[[2, 1]], 11);
assert_eq!(itl.next(), None);
assert_eq!(itr.next().unwrap()[[2, 1]], 17);
assert_eq!(itr.next().unwrap()[[2, 1]], 23);
assert_eq!(itr.next().unwrap()[[2, 1]], 29);
assert_eq!(itr.next(), None);
let (_, mut itr) = it.split_at(5);
assert_eq!(itr.next(), None);
}
#[test]
#[should_panic]
fn outer_iter_split_at_panics() {
let a = RcArray::from_iter(0..30).reshape((5, 3, 2));
let it = a.outer_iter();
it.split_at(6);
}
#[test]
fn outer_iter_mut_split_at() {
let mut a = RcArray::from_iter(0..30).reshape((5, 3, 2));
{
let it = a.outer_iter_mut();
let (mut itl, mut itr) = it.split_at(2);
itl.next();
itl.next().unwrap()[[2, 1]] += 1; assert_eq!(itl.next(), None);
itr.next();
itr.next();
itr.next().unwrap()[[2, 1]] -= 1; assert_eq!(itr.next(), None);
}
assert_eq!(a[[1, 2, 1]], 12);
assert_eq!(a[[4, 2, 1]], 28);
}
#[test]
fn iterators_are_send_sync() {
fn _send_sync<T: Send + Sync>(_: &T) { }
let mut a = RcArray::from_iter(0..30).into_shape((5, 3, 2)).unwrap();
_send_sync(&a.view());
_send_sync(&a.view_mut());
_send_sync(&a.iter());
_send_sync(&a.iter_mut());
_send_sync(&a.indexed_iter());
_send_sync(&a.indexed_iter_mut());
_send_sync(&a.inner_iter());
_send_sync(&a.inner_iter_mut());
_send_sync(&a.outer_iter());
_send_sync(&a.outer_iter_mut());
_send_sync(&a.axis_iter(Axis(1)));
_send_sync(&a.axis_iter_mut(Axis(1)));
_send_sync(&a.axis_chunks_iter(Axis(1), 1));
_send_sync(&a.axis_chunks_iter_mut(Axis(1), 1));
_send_sync(&Indexes::new(a.dim()));
}