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|
extern crate strsim;
use strsim::{
damerau_levenshtein, hamming, jaro, jaro_winkler, levenshtein, normalized_damerau_levenshtein,
normalized_levenshtein, osa_distance,
};
macro_rules! assert_delta {
($x:expr, $y:expr) => {
assert_delta!($x, $y, 1e-5);
};
($x:expr, $y:expr, $d:expr) => {
if ($x - $y).abs() > $d {
panic!(
"assertion failed: actual: `{}`, expected: `{}`: \
actual not within < {} of expected",
$x, $y, $d
);
}
};
}
#[test]
fn hamming_works() {
match hamming("hamming", "hammers") {
Ok(distance) => assert_eq!(3, distance),
Err(why) => panic!("{:?}", why),
}
}
#[test]
fn levenshtein_works() {
assert_eq!(3, levenshtein("kitten", "sitting"));
}
#[test]
fn normalized_levenshtein_works() {
assert_delta!(0.57142, normalized_levenshtein("kitten", "sitting"));
}
#[test]
fn osa_distance_works() {
assert_eq!(3, osa_distance("ac", "cba"));
}
#[test]
fn damerau_levenshtein_works() {
assert_eq!(2, damerau_levenshtein("ac", "cba"));
}
#[test]
fn normalized_damerau_levenshtein_works() {
assert_delta!(
0.27272,
normalized_damerau_levenshtein("levenshtein", "löwenbräu")
);
}
#[test]
fn jaro_works() {
assert_delta!(
0.392,
jaro("Friedrich Nietzsche", "Jean-Paul Sartre"),
0.001
);
}
#[test]
fn jaro_winkler_works() {
assert_delta!(0.866, jaro_winkler("cheeseburger", "cheese fries"), 0.001);
}
|
