#[cfg(test)]
mod tests {
use crate::set_algorithms::has_duplicates::has_duplicates;
#[test]
fn test_has_duplicates() {
let arr = [1, 2, 3, 2];
assert!(has_duplicates(&arr));
let arr = [1, 2, 3];
assert!(!has_duplicates(&arr));
let arr: [i32; 0] = [];
assert!(!has_duplicates(&arr));
let arr = [1];
assert!(!has_duplicates(&arr));
}
}