velesdb-core 5.1.0

High-performance vector database engine written in Rust
Documentation 
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use super::*;
use crate::point::Point;

/// Helper to build a `SearchResult` with a given score and dummy point data.
fn make_search_result(id: u64, score: f32) -> SearchResult {
    let point = Point::without_payload(id, vec![0.0; 4]);
    SearchResult::new(point, score)
}

// --- sort_results_by_metric ---

#[test]
fn sort_results_by_metric_descending_when_higher_is_better() {
    let mut results = vec![
        make_search_result(1, 0.3),
        make_search_result(2, 0.9),
        make_search_result(3, 0.6),
    ];
    sort_results_by_metric(&mut results, true);

    assert_eq!(results[0].point.id, 2);
    assert_eq!(results[1].point.id, 3);
    assert_eq!(results[2].point.id, 1);
}

#[test]
fn sort_results_by_metric_ascending_when_lower_is_better() {
    let mut results = vec![
        make_search_result(1, 0.3),
        make_search_result(2, 0.9),
        make_search_result(3, 0.6),
    ];
    sort_results_by_metric(&mut results, false);

    assert_eq!(results[0].point.id, 1);
    assert_eq!(results[1].point.id, 3);
    assert_eq!(results[2].point.id, 2);
}

#[test]
fn sort_results_by_metric_empty_slice_is_noop() {
    let mut results: Vec<SearchResult> = vec![];
    sort_results_by_metric(&mut results, true);
    assert!(results.is_empty());
}

#[test]
fn sort_results_by_metric_single_element() {
    let mut results = vec![make_search_result(1, 0.5)];
    sort_results_by_metric(&mut results, true);
    assert_eq!(results[0].point.id, 1);
}

// --- sort_results_descending ---

#[test]
fn sort_results_descending_always_highest_first() {
    let mut results = vec![
        make_search_result(10, 0.1),
        make_search_result(20, 0.8),
        make_search_result(30, 0.5),
        make_search_result(40, 1.0),
    ];
    sort_results_descending(&mut results);

    assert_eq!(results[0].point.id, 40);
    assert_eq!(results[1].point.id, 20);
    assert_eq!(results[2].point.id, 30);
    assert_eq!(results[3].point.id, 10);
}

#[test]
fn sort_results_descending_equal_scores_stable_enough() {
    let mut results = vec![make_search_result(1, 0.5), make_search_result(2, 0.5)];
    sort_results_descending(&mut results);
    // Both have the same score; we just verify no panic and both are present.
    let ids: Vec<u64> = results.iter().map(|r| r.point.id).collect();
    assert!(ids.contains(&1));
    assert!(ids.contains(&2));
}

// --- sort_scored_by_metric ---

#[test]
fn sort_scored_by_metric_descending_when_higher_is_better() {
    let mut results = vec![
        ScoredResult::new(1, 0.2),
        ScoredResult::new(2, 0.8),
        ScoredResult::new(3, 0.5),
    ];
    sort_scored_by_metric(&mut results, true);

    assert_eq!(results[0].id, 2);
    assert_eq!(results[1].id, 3);
    assert_eq!(results[2].id, 1);
}

#[test]
fn sort_scored_by_metric_ascending_when_lower_is_better() {
    let mut results = vec![
        ScoredResult::new(1, 0.2),
        ScoredResult::new(2, 0.8),
        ScoredResult::new(3, 0.5),
    ];
    sort_scored_by_metric(&mut results, false);

    assert_eq!(results[0].id, 1);
    assert_eq!(results[1].id, 3);
    assert_eq!(results[2].id, 2);
}

#[test]
fn sort_scored_by_metric_empty_slice_is_noop() {
    let mut results: Vec<ScoredResult> = vec![];
    sort_scored_by_metric(&mut results, true);
    assert!(results.is_empty());
}

// --- sparse_index_not_found ---

#[test]
fn sparse_index_not_found_with_named_index() {
    let err = sparse_index_not_found("my_index");
    let msg = err.to_string();
    assert!(
        msg.contains("my_index"),
        "Error message should contain the index name, got: {msg}"
    );
    // Verify it is an Error::Config variant.
    assert!(matches!(err, Error::Config(_)));
}

#[test]
fn sparse_index_not_found_empty_name_shows_default() {
    let err = sparse_index_not_found("");
    let msg = err.to_string();
    assert!(
        msg.contains("<default>"),
        "Empty name should display <default>, got: {msg}"
    );
    assert!(matches!(err, Error::Config(_)));
}

#[test]
fn sparse_index_not_found_nonempty_does_not_show_default() {
    let err = sparse_index_not_found("title_sparse");
    let msg = err.to_string();
    assert!(
        !msg.contains("<default>"),
        "Non-empty name should not show <default>, got: {msg}"
    );
}