Function argsort_permutation_default

rust/stringzilla.rs:3695–3709

()

    #[test]
    fn argsort_permutation_default() {
        // Test with a slice of string literals.
        let fruits = ["banana", "apple", "cherry"];
        let mut order = [0; 3]; // output buffer must be at least fruits.len()
        sz::argsort_permutation(&fruits, &mut order).expect("argsort_permutation failed");

        // Reconstruct sorted order using the returned indices.
        let sorted_from_api: Vec<_> = order.iter().map(|&i| fruits[i]).collect();

        // Compute expected order using the standard sort.
        let mut expected = fruits.to_vec();
        expected.sort();

        assert_eq!(sorted_from_api, expected);
    }

    #[test]
    fn argsort_permutation_by_custom() {