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Merge #485

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485: fix bug on 2 typos derivation r=Kerollmops a=MarinPostma

I found a bug while working on #473. This pr fixes it and add the missing tests on word derivations.


Co-authored-by: ad hoc <postma.marin@protonmail.com>
This commit is contained in:
bors[bot] 2022-04-04 17:17:53 +00:00 committed by GitHub
commit 6bf9824fec
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1 changed files with 65 additions and 2 deletions
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67
milli/src/search/mod.rs
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@ -333,12 +333,12 @@ pub fn word_derivations<'c>(
// in the case the typo is on the first letter, we know the number of typo
// is two
if get_first(found_word) != get_first(word) {
derived_words.push((word.to_string(), 2));
derived_words.push((found_word.to_string(), 2));
} else {
// Else, we know that it is the second dfa that matched and compute the
// correct distance
let d = second_dfa.distance((state.1).0);
derived_words.push((word.to_string(), d.to_u8()));
derived_words.push((found_word.to_string(), d.to_u8()));
}
}
}
@ -398,4 +398,67 @@ mod test {
search.authorize_typos(true);
assert!(!search.is_typo_authorized().unwrap());
}
#[test]
fn test_one_typos_tolerance() {
let fst = fst::Set::from_iter(["zealand"].iter()).unwrap().map_data(Cow::Owned).unwrap();
let mut cache = HashMap::new();
let found = word_derivations("zealend", false, 1, &fst, &mut cache).unwrap();
assert_eq!(found, &[("zealand".to_string(), 1)]);
}
#[test]
fn test_one_typos_first_letter() {
let fst = fst::Set::from_iter(["zealand"].iter()).unwrap().map_data(Cow::Owned).unwrap();
let mut cache = HashMap::new();
let found = word_derivations("sealand", false, 1, &fst, &mut cache).unwrap();
assert_eq!(found, &[]);
}
#[test]
fn test_two_typos_tolerance() {
let fst = fst::Set::from_iter(["zealand"].iter()).unwrap().map_data(Cow::Owned).unwrap();
let mut cache = HashMap::new();
let found = word_derivations("zealemd", false, 2, &fst, &mut cache).unwrap();
assert_eq!(found, &[("zealand".to_string(), 2)]);
}
#[test]
fn test_two_typos_first_letter() {
let fst = fst::Set::from_iter(["zealand"].iter()).unwrap().map_data(Cow::Owned).unwrap();
let mut cache = HashMap::new();
let found = word_derivations("sealand", false, 2, &fst, &mut cache).unwrap();
assert_eq!(found, &[("zealand".to_string(), 2)]);
}
#[test]
fn test_prefix() {
let fst = fst::Set::from_iter(["zealand"].iter()).unwrap().map_data(Cow::Owned).unwrap();
let mut cache = HashMap::new();
let found = word_derivations("ze", true, 0, &fst, &mut cache).unwrap();
assert_eq!(found, &[("zealand".to_string(), 0)]);
}
#[test]
fn test_bad_prefix() {
let fst = fst::Set::from_iter(["zealand"].iter()).unwrap().map_data(Cow::Owned).unwrap();
let mut cache = HashMap::new();
let found = word_derivations("se", true, 0, &fst, &mut cache).unwrap();
assert_eq!(found, &[]);
}
#[test]
fn test_prefix_with_typo() {
let fst = fst::Set::from_iter(["zealand"].iter()).unwrap().map_data(Cow::Owned).unwrap();
let mut cache = HashMap::new();
let found = word_derivations("zae", true, 1, &fst, &mut cache).unwrap();
assert_eq!(found, &[("zealand".to_string(), 1)]);
}
}