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use super::*;
#[test]
fn test_edit_distance() {
// Test bytelength agnosticity
for c in (0..char::MAX as u32).filter_map(char::from_u32).map(|i| i.to_string()) {
assert_eq!(edit_distance(&c[..], &c[..], usize::MAX), Some(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!(edit_distance(a, b, usize::MAX), Some(1));
assert_eq!(edit_distance(b, a, usize::MAX), Some(1));
assert_eq!(edit_distance(a, c, usize::MAX), Some(2));
assert_eq!(edit_distance(c, a, usize::MAX), Some(2));
assert_eq!(edit_distance(b, c, usize::MAX), Some(1));
assert_eq!(edit_distance(c, b, usize::MAX), Some(1));
}
#[test]
fn test_edit_distance_limit() {
assert_eq!(edit_distance("abc", "abcd", 1), Some(1));
assert_eq!(edit_distance("abc", "abcd", 0), None);
assert_eq!(edit_distance("abc", "xyz", 3), Some(3));
assert_eq!(edit_distance("abc", "xyz", 2), None);
}
#[test]
fn test_method_name_similarity_score() {
assert_eq!(edit_distance_with_substrings("empty", "is_empty", 1), Some(1));
assert_eq!(edit_distance_with_substrings("shrunk", "rchunks", 2), None);
assert_eq!(edit_distance_with_substrings("abc", "abcd", 1), Some(1));
assert_eq!(edit_distance_with_substrings("a", "abcd", 1), None);
assert_eq!(edit_distance_with_substrings("edf", "eq", 1), None);
assert_eq!(edit_distance_with_substrings("abc", "xyz", 3), Some(3));
assert_eq!(edit_distance_with_substrings("abcdef", "abcdef", 2), Some(0));
}
#[test]
fn test_find_best_match_for_name() {
use crate::create_default_session_globals_then;
create_default_session_globals_then(|| {
let input = vec![Symbol::intern("aaab"), Symbol::intern("aaabc")];
assert_eq!(
find_best_match_for_name(&input, Symbol::intern("aaaa"), None),
Some(Symbol::intern("aaab"))
);
assert_eq!(find_best_match_for_name(&input, Symbol::intern("1111111111"), None), None);
let input = vec![Symbol::intern("AAAA")];
assert_eq!(
find_best_match_for_name(&input, Symbol::intern("aaaa"), None),
Some(Symbol::intern("AAAA"))
);
let input = vec![Symbol::intern("AAAA")];
assert_eq!(
find_best_match_for_name(&input, Symbol::intern("aaaa"), Some(4)),
Some(Symbol::intern("AAAA"))
);
let input = vec![Symbol::intern("a_longer_variable_name")];
assert_eq!(
find_best_match_for_name(&input, Symbol::intern("a_variable_longer_name"), None),
Some(Symbol::intern("a_longer_variable_name"))
);
})
}
#[test]
fn test_precise_algorithm() {
// Not Levenshtein distance.
assert_ne!(edit_distance("ab", "ba", usize::MAX), Some(2));
// Not unrestricted Damerau-Levenshtein distance.
assert_ne!(edit_distance("abde", "bcaed", usize::MAX), Some(3));
// The current implementation is a restricted Damerau-Levenshtein distance.
assert_eq!(edit_distance("abde", "bcaed", usize::MAX), Some(4));
}
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