6     let left: Vec<u32> = vec![];  in empty()
7     let right: Vec<u32> = vec![];  in empty()
8     let expected_result: Vec<EitherOrBoth<u32>> = vec![];  in empty()
9     let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)).collect::<Vec<_>>();  in empty()
15     let left: Vec<u32> = vec![1, 2, 3];  in left_only()
16     let right: Vec<u32> = vec![];  in left_only()
17     let expected_result: Vec<EitherOrBoth<u32>> = vec![  in left_only()
22     let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)).collect::<Vec<_>>();  in left_only()
28     let left: Vec<u32> = vec![];  in right_only()
29     let right: Vec<u32> = vec![1, 2, 3];  in right_only()
30     let expected_result: Vec<EitherOrBoth<u32>> = vec![  in right_only()
35     let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)).collect::<Vec<_>>();  in right_only()
41     let left: Vec<u32> = vec![1, 2, 3];  in first_left_then_right()
42     let right: Vec<u32> = vec![4, 5, 6];  in first_left_then_right()
43     let expected_result: Vec<EitherOrBoth<u32>> = vec![  in first_left_then_right()
51     let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)).collect::<Vec<_>>();  in first_left_then_right()
57     let left: Vec<u32> = vec![4, 5, 6];  in first_right_then_left()
58     let right: Vec<u32> = vec![1, 2, 3];  in first_right_then_left()
59     let expected_result: Vec<EitherOrBoth<u32>> = vec![  in first_right_then_left()
67     let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)).collect::<Vec<_>>();  in first_right_then_left()
73     let left: Vec<u32> = vec![1, 3, 5];  in interspersed_left_and_right()
74     let right: Vec<u32> = vec![2, 4, 6];  in interspersed_left_and_right()
75     let expected_result: Vec<EitherOrBoth<u32>> = vec![  in interspersed_left_and_right()
83     let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)).collect::<Vec<_>>();  in interspersed_left_and_right()
89     let left: Vec<u32> = vec![1, 3, 4, 6];  in overlapping_left_and_right()
90     let right: Vec<u32> = vec![2, 3, 4, 5];  in overlapping_left_and_right()
91     let expected_result: Vec<EitherOrBoth<u32>> = vec![  in overlapping_left_and_right()
99     let actual_result = merge_join_by(left, right, |l, r| l.cmp(r)).collect::<Vec<_>>();  in overlapping_left_and_right()