velesdb-core 5.1.0

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

fn make_result(id: u64, payload: serde_json::Value) -> SearchResult {
    make_result_with_score(id, payload, 1.0)
}

fn make_result_with_score(id: u64, payload: serde_json::Value, score: f32) -> SearchResult {
    SearchResult::new(
        Point {
            id,
            vector: vec![0.0; 4],
            payload: Some(payload),
            sparse_vectors: None,
        },
        score,
    )
}

#[test]
fn test_apply_distinct_removes_duplicates() {
    let results = vec![
        make_result(1, serde_json::json!({"name": "Alice"})),
        make_result(2, serde_json::json!({"name": "Alice"})),
        make_result(3, serde_json::json!({"name": "Bob"})),
    ];

    let columns = SelectColumns::Columns(vec![crate::velesql::Column {
        name: "name".to_string(),
        alias: None,
    }]);

    let distinct = apply_distinct(results, &columns);
    assert_eq!(distinct.len(), 2);
}

#[test]
fn test_compute_distinct_key_empty_columns() {
    let result = make_result(1, serde_json::json!({"a": 1, "b": 2}));
    let key = compute_distinct_key(&result, &[], false);
    assert!(key.contains('1')); // Full payload serialized
}

#[test]
fn test_compute_distinct_key_specific_columns() {
    let result = make_result(1, serde_json::json!({"name": "Alice", "age": 30}));
    let key = compute_distinct_key(&result, &["name".to_string()], false);
    assert!(key.contains("Alice"));
    assert!(!key.contains("30"));
}

#[test]
fn test_canonical_json_key_order_independent() {
    // Two payloads with same content but different key order
    let result1 = make_result(1, serde_json::json!({"a": 1, "b": 2}));
    let result2 = make_result(2, serde_json::json!({"b": 2, "a": 1}));

    let key1 = compute_distinct_key(&result1, &[], false);
    let key2 = compute_distinct_key(&result2, &[], false);

    // Keys should be identical regardless of original key order
    assert_eq!(
        key1, key2,
        "Canonical JSON should produce same key for logically equal objects"
    );
}

#[test]
fn test_canonical_json_nested_objects() {
    let result1 = make_result(1, serde_json::json!({"outer": {"z": 1, "a": 2}}));
    let result2 = make_result(2, serde_json::json!({"outer": {"a": 2, "z": 1}}));

    let key1 = compute_distinct_key(&result1, &[], false);
    let key2 = compute_distinct_key(&result2, &[], false);

    assert_eq!(key1, key2, "Nested objects should also be canonicalized");
}

#[test]
fn test_distinct_mixed_with_similarity_preserves_different_scores() {
    let results = vec![
        make_result_with_score(1, serde_json::json!({"title": "Rust"}), 0.95),
        make_result_with_score(2, serde_json::json!({"title": "Rust"}), 0.80),
        make_result_with_score(3, serde_json::json!({"title": "Go"}), 0.70),
    ];

    let columns = SelectColumns::Mixed {
        columns: vec![crate::velesql::Column {
            name: "title".to_string(),
            alias: None,
        }],
        aggregations: vec![],
        similarity_scores: vec![crate::velesql::SimilarityScoreExpr {
            alias: Some("score".to_string()),
        }],
        qualified_wildcards: vec![],
        window_functions: vec![],
    };

    let distinct = apply_distinct(results, &columns);
    // Both "Rust" rows should be kept because scores differ
    assert_eq!(distinct.len(), 3);
}

#[test]
fn test_distinct_mixed_without_similarity_collapses_same_payload() {
    let results = vec![
        make_result_with_score(1, serde_json::json!({"title": "Rust"}), 0.95),
        make_result_with_score(2, serde_json::json!({"title": "Rust"}), 0.80),
    ];

    let columns = SelectColumns::Mixed {
        columns: vec![crate::velesql::Column {
            name: "title".to_string(),
            alias: None,
        }],
        aggregations: vec![],
        similarity_scores: vec![],
        qualified_wildcards: vec![],
        window_functions: vec![],
    };

    let distinct = apply_distinct(results, &columns);
    // Without similarity in SELECT, same title → collapsed
    assert_eq!(distinct.len(), 1);
}