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use itertools::{assert_equal, Itertools};
use std::{ops::Range, vec::IntoIter};
fn mix_data() -> IntoIter<Result<Range<i32>, bool>> {
vec![Ok(0..2), Err(false), Ok(2..4), Err(true), Ok(4..6)].into_iter()
}
fn ok_data() -> IntoIter<Result<Range<i32>, bool>> {
vec![Ok(0..2), Ok(2..4), Ok(4..6)].into_iter()
}
#[test]
fn flatten_ok_mixed_expected_forward() {
assert_equal(
mix_data().flatten_ok(),
vec![
Ok(0),
Ok(1),
Err(false),
Ok(2),
Ok(3),
Err(true),
Ok(4),
Ok(5),
],
);
}
#[test]
fn flatten_ok_mixed_expected_reverse() {
assert_equal(
mix_data().flatten_ok().rev(),
vec![
Ok(5),
Ok(4),
Err(true),
Ok(3),
Ok(2),
Err(false),
Ok(1),
Ok(0),
],
);
}
#[test]
fn flatten_ok_collect_mixed_forward() {
assert_eq!(
mix_data().flatten_ok().collect::<Result<Vec<_>, _>>(),
Err(false)
);
}
#[test]
fn flatten_ok_collect_mixed_reverse() {
assert_eq!(
mix_data().flatten_ok().rev().collect::<Result<Vec<_>, _>>(),
Err(true)
);
}
#[test]
fn flatten_ok_collect_ok_forward() {
assert_eq!(
ok_data().flatten_ok().collect::<Result<Vec<_>, _>>(),
Ok((0..6).collect())
);
}
#[test]
fn flatten_ok_collect_ok_reverse() {
assert_eq!(
ok_data().flatten_ok().rev().collect::<Result<Vec<_>, _>>(),
Ok((0..6).rev().collect())
);
}