public void IsTree(TestData testGraph)
 => Assert.Equal(
     testGraph.IsTree,
     GraphProperties.IsTree(
         GraphProperties.IsConnected(testGraph.Graph).isConnected,
         GraphProperties.IsCyclic(testGraph.Graph)));
 public void IsCyclic(TestData testGraph)
 => Assert.Equal(testGraph.IsCyclic, GraphProperties.IsCyclic(testGraph.Graph));