| """Unit tests for the :mod:`networkx.algorithms.isolates` module.""" | |
| import networkx as nx | |
| def test_is_isolate(): | |
| G = nx.Graph() | |
| G.add_edge(0, 1) | |
| G.add_node(2) | |
| assert not nx.is_isolate(G, 0) | |
| assert not nx.is_isolate(G, 1) | |
| assert nx.is_isolate(G, 2) | |
| def test_isolates(): | |
| G = nx.Graph() | |
| G.add_edge(0, 1) | |
| G.add_nodes_from([2, 3]) | |
| assert sorted(nx.isolates(G)) == [2, 3] | |
| def test_number_of_isolates(): | |
| G = nx.Graph() | |
| G.add_edge(0, 1) | |
| G.add_nodes_from([2, 3]) | |
| assert nx.number_of_isolates(G) == 2 | |