public void TryGetVertexPairs()
{
var graph = new AdjacencyGraph <int, Edge <int> >();
var algorithm = new TarjanOfflineLeastCommonAncestorAlgorithm <int, Edge <int> >(graph);
Assert.IsFalse(algorithm.TryGetVertexPairs(out _));
graph.AddVertexRange(new[] { 1, 2 });
algorithm.SetVertexPairs(new[] { new SEquatableEdge <int>(1, 2) });
Assert.IsTrue(algorithm.TryGetVertexPairs(out IEnumerable <SEquatableEdge <int> > pairs));
CollectionAssert.AreEqual(
new[] { new SEquatableEdge <int>(1, 2) },
pairs);
}
