Two leaf nodes which are always connected:
directed: false
vcount: 2
edges: {
0 1
}
Four leaf nodes, one node connected to all others:
directed: false
vcount: 4
edges: {
0 1
0 2
0 3
}
Check error handling for wrong number of probabilities.
Check error handling for graph with loop.
Check error handling for graph with no edges.
