indradb-lib 0.19.0

A graph database library
Documentation 
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use super::super::{BulkInsertItem, Datastore, EdgeKey, EdgeQuery, Transaction, Type, Vertex, VertexQuery};
use chrono::offset::Utc;
use chrono::Timelike;
use serde_json::Value as JsonValue;

pub fn should_bulk_insert<D: Datastore>(datastore: &mut D) {
    let vertex_t = Type::new("test_vertex_type".to_string()).unwrap();
    let outbound_v = Vertex::new(vertex_t.clone());
    let inbound_v = Vertex::new(vertex_t.clone());

    let items = vec![
        BulkInsertItem::Vertex(outbound_v.clone()),
        BulkInsertItem::Vertex(inbound_v.clone()),
    ];

    datastore.bulk_insert(items.into_iter()).unwrap();

    // Record the start and end time. Round off the the nanoseconds off the
    // start time, since some implementations may not have that level of
    // accuracy.
    let start_time = Utc::now().with_nanosecond(0).unwrap();
    let edge_t = Type::new("test_edge_type".to_string()).unwrap();
    let key = EdgeKey::new(outbound_v.id, edge_t.clone(), inbound_v.id);

    let items = vec![
        BulkInsertItem::Edge(key.clone()),
        BulkInsertItem::VertexProperty(
            outbound_v.id,
            "vertex_property_name".to_string(),
            JsonValue::String("vertex_property_value".to_string()),
        ),
        BulkInsertItem::EdgeProperty(
            key.clone(),
            "edge_property_name".to_string(),
            JsonValue::String("edge_property_value".to_string()),
        ),
    ];

    datastore.bulk_insert(items.into_iter()).unwrap();

    let end_time = Utc::now();

    let trans = datastore.transaction().unwrap();

    let vertices = trans
        .get_vertices(&VertexQuery::Vertices {
            ids: vec![outbound_v.id, inbound_v.id],
        })
        .unwrap();

    assert_eq!(vertices.len(), 2);
    assert_eq!(vertices[0].id, outbound_v.id);
    assert_eq!(vertices[0].t, outbound_v.t);
    assert_eq!(vertices[1].id, inbound_v.id);
    assert_eq!(vertices[1].t, inbound_v.t);

    let edges = trans
        .get_edges(&EdgeQuery::Edges {
            keys: vec![key.clone()],
        })
        .unwrap();

    assert_eq!(edges.len(), 1);
    assert_eq!(edges[0].key.outbound_id, outbound_v.id);
    assert_eq!(edges[0].key.t, edge_t);
    assert_eq!(edges[0].key.inbound_id, inbound_v.id);
    assert!(edges[0].created_datetime >= start_time);
    assert!(edges[0].created_datetime <= end_time);

    let vertex_properties = trans
        .get_vertex_properties(
            &VertexQuery::Vertices {
                ids: vec![outbound_v.id],
            },
            "vertex_property_name",
        )
        .unwrap();

    assert_eq!(vertex_properties.len(), 1);
    assert_eq!(vertex_properties[0].id, outbound_v.id);
    assert_eq!(
        vertex_properties[0].value,
        JsonValue::String("vertex_property_value".to_string())
    );

    let edge_properties = trans
        .get_edge_properties(
            &EdgeQuery::Edges {
                keys: vec![key.clone()],
            },
            "edge_property_name",
        )
        .unwrap();

    assert_eq!(edge_properties.len(), 1);
    assert_eq!(edge_properties[0].key, key);
    assert_eq!(
        edge_properties[0].value,
        JsonValue::String("edge_property_value".to_string())
    );
}

// Bulk insert allows for redundant vertex insertion
pub fn should_bulk_insert_a_redundant_vertex<D: Datastore>(datastore: &mut D) {
    let vertex_t = Type::new("test_vertex_type".to_string()).unwrap();
    let vertex = Vertex::new(vertex_t.clone());

    let trans = datastore.transaction().unwrap();
    assert!(trans.create_vertex(&vertex).unwrap());

    let items = vec![BulkInsertItem::Vertex(vertex.clone())];
    assert!(datastore.bulk_insert(items.into_iter()).is_ok());
}

// As an optimization, bulk insert does not verify that the vertices
// associated with an inserted edge exist; this verifies that
pub fn should_bulk_insert_an_invalid_edge<D: Datastore>(datastore: &mut D) {
    let vertex_t = Type::new("test_vertex_type".to_string()).unwrap();
    let v1 = Vertex::new(vertex_t.clone());
    let v2 = Vertex::new(vertex_t.clone());

    let trans = datastore.transaction().unwrap();
    assert!(trans.create_vertex(&v1).unwrap());

    let edge_t = Type::new("test_edge_type".to_string()).unwrap();

    let items = vec![BulkInsertItem::Edge(EdgeKey::new(v1.id, edge_t.clone(), v2.id))];
    assert!(datastore.bulk_insert(items.into_iter()).is_ok());
    let items = vec![BulkInsertItem::Edge(EdgeKey::new(v2.id, edge_t.clone(), v1.id))];
    assert!(datastore.bulk_insert(items.into_iter()).is_ok());
}