public async Task BFS_FindOne_with_connected_root_should_return_correct_results()
{
var graph = new GraphStorage("TestGraph", Env);
Node node2;
using (var tx = graph.NewTransaction(TransactionFlags.ReadWrite))
{
var node1 = graph.Commands.CreateNode(tx, JsonFromValue("test1"));
node2 = graph.Commands.CreateNode(tx, JsonFromValue("test2"));
var node3 = graph.Commands.CreateNode(tx, JsonFromValue("test3"));
graph.Commands.CreateEdgeBetween(tx, node3, node1);
graph.Commands.CreateEdgeBetween(tx, node3, node2);
graph.Commands.CreateEdgeBetween(tx, node2, node2);
graph.Commands.CreateEdgeBetween(tx, node1, node3);
tx.Commit();
}
using (var tx = graph.NewTransaction(TransactionFlags.Read))
{
var bfs = new BreadthFirstSearch(graph, CancelTokenSource.Token);
var node = await bfs.FindOne(tx, data => ValueFromJson<string>(data).Equals("test2"));
node.Should().NotBeNull();
node.Key.Should().Be(node2.Key);
}
}
public async Task BFS_FindOne_with_only_root_node_in_graph_returns_correct_results()
{
var graph = new GraphStorage("TestGraph", Env);
using (var tx = graph.NewTransaction(TransactionFlags.ReadWrite))
{
graph.Commands.CreateNode(tx, JsonFromValue("test1"));
tx.Commit();
}
using (var tx = graph.NewTransaction(TransactionFlags.Read))
{
var bfs = new BreadthFirstSearch(graph, CancelTokenSource.Token);
var node = await bfs.FindOne(tx, data => ValueFromJson<string>(data).Equals("test1"));
node.Should().NotBeNull();
}
}
public async Task BFS_FindOne_with_disconnected_root_should_return_null()
{
var graph = new GraphStorage("TestGraph", Env);
Node node2;
using (var tx = graph.NewTransaction(TransactionFlags.ReadWrite))
{
var node1 = graph.Commands.CreateNode(tx, JsonFromValue("test1"));
node2 = graph.Commands.CreateNode(tx, JsonFromValue("test2"));
var node3 = graph.Commands.CreateNode(tx, JsonFromValue("test3"));
graph.Commands.CreateEdgeBetween(tx, node3, node1);
graph.Commands.CreateEdgeBetween(tx, node3, node2);
//note: root node is selected by using a first node that was added
//since Voron.Graph is a directed graph - no node leads from the root node means nothing
//can be found
tx.Commit();
}
using (var tx = graph.NewTransaction(TransactionFlags.Read))
{
var bfs = new BreadthFirstSearch(graph, CancelTokenSource.Token);
var node = await bfs.FindOne(tx, data => ValueFromJson<string>(data).Equals("test2"));
node.Should().BeNull();
}
}