Function topological

tests/test_directed_graph.rs:118–128

()

#[test]
fn topological() {
    let graph = create_digraph(TINY_DG);
    let cycle = Topological::from(graph.as_ref());
    assert!(!cycle.has_order());

    let i = JOBS;
    let symbol_graph = SymbolGraph::new(i, "/", |nv| Box::new(Digraph::from(nv)));
    let graph = symbol_graph.G();
    let cycle = Topological::from(graph);
    assert!(cycle.has_order());
}

#[test]
fn scc() {