[[]]
= "hash_candidate"
= "abracadabra"
= "cad"
= 4
[[]]
= "empty_needle"
= "abc"
= ""
= 0
[[]]
= "absent"
= "abc"
= "abcd"
= 4294967295
[[]]
= "overlapping_first"
= "aaaaa"
= "aaa"
= 0
[[]]
= "late_match"
= "zzzzneedle"
= "needle"
= 4