public void IsolatedGraph(bool value)
{
Graph graph = new MatrixGraph(10, true);
graph.AddEdge(0, 9, 10);
graph.AddEdge(2, 0, 5);
Graph isolatedGraph = graph.IsolatedGraph(value);
Assert.Equal(10, isolatedGraph.VerticesCount);
Assert.Equal(value, isolatedGraph.Directed);
Assert.Equal(0, isolatedGraph.EdgesCount);
}