| Jakub Kotur | a425e55 | 2020-12-21 17:28:15 +0100 | [diff] [blame] | 1 | use itertools::EitherOrBoth; |
| 2 | use itertools::free::merge_join_by; |
| 3 | |
| 4 | #[test] |
| 5 | fn empty() { |
| 6 | let left: Vec<u32> = vec![]; |
| 7 | let right: Vec<u32> = vec![]; |
| 8 | let expected_result: Vec<EitherOrBoth<u32, u32>> = vec![]; |
| 9 | let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)) |
| 10 | .collect::<Vec<_>>(); |
| 11 | assert_eq!(expected_result, actual_result); |
| 12 | } |
| 13 | |
| 14 | #[test] |
| 15 | fn left_only() { |
| 16 | let left: Vec<u32> = vec![1,2,3]; |
| 17 | let right: Vec<u32> = vec![]; |
| 18 | let expected_result: Vec<EitherOrBoth<u32, u32>> = vec![ |
| 19 | EitherOrBoth::Left(1), |
| 20 | EitherOrBoth::Left(2), |
| 21 | EitherOrBoth::Left(3) |
| 22 | ]; |
| 23 | let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)) |
| 24 | .collect::<Vec<_>>(); |
| 25 | assert_eq!(expected_result, actual_result); |
| 26 | } |
| 27 | |
| 28 | #[test] |
| 29 | fn right_only() { |
| 30 | let left: Vec<u32> = vec![]; |
| 31 | let right: Vec<u32> = vec![1,2,3]; |
| 32 | let expected_result: Vec<EitherOrBoth<u32, u32>> = vec![ |
| 33 | EitherOrBoth::Right(1), |
| 34 | EitherOrBoth::Right(2), |
| 35 | EitherOrBoth::Right(3) |
| 36 | ]; |
| 37 | let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)) |
| 38 | .collect::<Vec<_>>(); |
| 39 | assert_eq!(expected_result, actual_result); |
| 40 | } |
| 41 | |
| 42 | #[test] |
| 43 | fn first_left_then_right() { |
| 44 | let left: Vec<u32> = vec![1,2,3]; |
| 45 | let right: Vec<u32> = vec![4,5,6]; |
| 46 | let expected_result: Vec<EitherOrBoth<u32, u32>> = vec![ |
| 47 | EitherOrBoth::Left(1), |
| 48 | EitherOrBoth::Left(2), |
| 49 | EitherOrBoth::Left(3), |
| 50 | EitherOrBoth::Right(4), |
| 51 | EitherOrBoth::Right(5), |
| 52 | EitherOrBoth::Right(6) |
| 53 | ]; |
| 54 | let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)) |
| 55 | .collect::<Vec<_>>(); |
| 56 | assert_eq!(expected_result, actual_result); |
| 57 | } |
| 58 | |
| 59 | #[test] |
| 60 | fn first_right_then_left() { |
| 61 | let left: Vec<u32> = vec![4,5,6]; |
| 62 | let right: Vec<u32> = vec![1,2,3]; |
| 63 | let expected_result: Vec<EitherOrBoth<u32, u32>> = vec![ |
| 64 | EitherOrBoth::Right(1), |
| 65 | EitherOrBoth::Right(2), |
| 66 | EitherOrBoth::Right(3), |
| 67 | EitherOrBoth::Left(4), |
| 68 | EitherOrBoth::Left(5), |
| 69 | EitherOrBoth::Left(6) |
| 70 | ]; |
| 71 | let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)) |
| 72 | .collect::<Vec<_>>(); |
| 73 | assert_eq!(expected_result, actual_result); |
| 74 | } |
| 75 | |
| 76 | #[test] |
| 77 | fn interspersed_left_and_right() { |
| 78 | let left: Vec<u32> = vec![1,3,5]; |
| 79 | let right: Vec<u32> = vec![2,4,6]; |
| 80 | let expected_result: Vec<EitherOrBoth<u32, u32>> = vec![ |
| 81 | EitherOrBoth::Left(1), |
| 82 | EitherOrBoth::Right(2), |
| 83 | EitherOrBoth::Left(3), |
| 84 | EitherOrBoth::Right(4), |
| 85 | EitherOrBoth::Left(5), |
| 86 | EitherOrBoth::Right(6) |
| 87 | ]; |
| 88 | let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)) |
| 89 | .collect::<Vec<_>>(); |
| 90 | assert_eq!(expected_result, actual_result); |
| 91 | } |
| 92 | |
| 93 | #[test] |
| 94 | fn overlapping_left_and_right() { |
| 95 | let left: Vec<u32> = vec![1,3,4,6]; |
| 96 | let right: Vec<u32> = vec![2,3,4,5]; |
| 97 | let expected_result: Vec<EitherOrBoth<u32, u32>> = vec![ |
| 98 | EitherOrBoth::Left(1), |
| 99 | EitherOrBoth::Right(2), |
| 100 | EitherOrBoth::Both(3, 3), |
| 101 | EitherOrBoth::Both(4, 4), |
| 102 | EitherOrBoth::Right(5), |
| 103 | EitherOrBoth::Left(6) |
| 104 | ]; |
| 105 | let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)) |
| 106 | .collect::<Vec<_>>(); |
| 107 | assert_eq!(expected_result, actual_result); |
| 108 | } |