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use super::*;
#[test]
fn test_lev_distance() {
use std::char::{from_u32, MAX};
// Test bytelength agnosticity
for c in (0..MAX as u32)
.filter_map(|i| from_u32(i))
.map(|i| i.to_string()) {
assert_eq!(lev_distance(&c[..], &c[..]), 0);
}
let a = "\nMäry häd ä little lämb\n\nLittle lämb\n";
let b = "\nMary häd ä little lämb\n\nLittle lämb\n";
let c = "Mary häd ä little lämb\n\nLittle lämb\n";
assert_eq!(lev_distance(a, b), 1);
assert_eq!(lev_distance(b, a), 1);
assert_eq!(lev_distance(a, c), 2);
assert_eq!(lev_distance(c, a), 2);
assert_eq!(lev_distance(b, c), 1);
assert_eq!(lev_distance(c, b), 1);
}
#[test]
fn test_find_best_match_for_name() {
use crate::with_default_globals;
with_default_globals(|| {
let input = vec![Symbol::intern("aaab"), Symbol::intern("aaabc")];
assert_eq!(
find_best_match_for_name(input.iter(), "aaaa", None),
Some(Symbol::intern("aaab"))
);
assert_eq!(
find_best_match_for_name(input.iter(), "1111111111", None),
None
);
let input = vec![Symbol::intern("aAAA")];
assert_eq!(
find_best_match_for_name(input.iter(), "AAAA", None),
Some(Symbol::intern("aAAA"))
);
let input = vec![Symbol::intern("AAAA")];
// Returns None because `lev_distance > max_dist / 3`
assert_eq!(
find_best_match_for_name(input.iter(), "aaaa", None),
None
);
let input = vec![Symbol::intern("AAAA")];
assert_eq!(
find_best_match_for_name(input.iter(), "aaaa", Some(4)),
Some(Symbol::intern("AAAA"))
);
})
}
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