Joel Galenson | b593e25 | 2021-06-21 13:15:57 -0700 | [diff] [blame] | 1 | use itertools::{assert_equal, Itertools}; |
| 2 | use std::{ops::Range, vec::IntoIter}; |
| 3 | |
| 4 | fn mix_data() -> IntoIter<Result<Range<i32>, bool>> { |
| 5 | vec![Ok(0..2), Err(false), Ok(2..4), Err(true), Ok(4..6)].into_iter() |
| 6 | } |
| 7 | |
| 8 | fn ok_data() -> IntoIter<Result<Range<i32>, bool>> { |
| 9 | vec![Ok(0..2), Ok(2..4), Ok(4..6)].into_iter() |
| 10 | } |
| 11 | |
| 12 | #[test] |
| 13 | fn flatten_ok_mixed_expected_forward() { |
| 14 | assert_equal( |
| 15 | mix_data().flatten_ok(), |
| 16 | vec![ |
| 17 | Ok(0), |
| 18 | Ok(1), |
| 19 | Err(false), |
| 20 | Ok(2), |
| 21 | Ok(3), |
| 22 | Err(true), |
| 23 | Ok(4), |
| 24 | Ok(5), |
| 25 | ], |
| 26 | ); |
| 27 | } |
| 28 | |
| 29 | #[test] |
| 30 | fn flatten_ok_mixed_expected_reverse() { |
| 31 | assert_equal( |
| 32 | mix_data().flatten_ok().rev(), |
| 33 | vec![ |
| 34 | Ok(5), |
| 35 | Ok(4), |
| 36 | Err(true), |
| 37 | Ok(3), |
| 38 | Ok(2), |
| 39 | Err(false), |
| 40 | Ok(1), |
| 41 | Ok(0), |
| 42 | ], |
| 43 | ); |
| 44 | } |
| 45 | |
| 46 | #[test] |
| 47 | fn flatten_ok_collect_mixed_forward() { |
| 48 | assert_eq!( |
| 49 | mix_data().flatten_ok().collect::<Result<Vec<_>, _>>(), |
| 50 | Err(false) |
| 51 | ); |
| 52 | } |
| 53 | |
| 54 | #[test] |
| 55 | fn flatten_ok_collect_mixed_reverse() { |
| 56 | assert_eq!( |
| 57 | mix_data().flatten_ok().rev().collect::<Result<Vec<_>, _>>(), |
| 58 | Err(true) |
| 59 | ); |
| 60 | } |
| 61 | |
| 62 | #[test] |
| 63 | fn flatten_ok_collect_ok_forward() { |
| 64 | assert_eq!( |
| 65 | ok_data().flatten_ok().collect::<Result<Vec<_>, _>>(), |
| 66 | Ok((0..6).collect()) |
| 67 | ); |
| 68 | } |
| 69 | |
| 70 | #[test] |
| 71 | fn flatten_ok_collect_ok_reverse() { |
| 72 | assert_eq!( |
| 73 | ok_data().flatten_ok().rev().collect::<Result<Vec<_>, _>>(), |
| 74 | Ok((0..6).rev().collect()) |
| 75 | ); |
| 76 | } |