| #!/usr/bin/env python |
| from nose.tools import * |
| import networkx as nx |
| from networkx import convert_node_labels_to_integers as cnlti |
| from networkx import NetworkXError |
| |
| class TestConnected: |
| |
| def setUp(self): |
| G1=cnlti(nx.grid_2d_graph(2,2),first_label=0,ordering="sorted") |
| G2=cnlti(nx.lollipop_graph(3,3),first_label=4,ordering="sorted") |
| G3=cnlti(nx.house_graph(),first_label=10,ordering="sorted") |
| self.G=nx.union(G1,G2) |
| self.G=nx.union(self.G,G3) |
| self.DG=nx.DiGraph([(1,2),(1,3),(2,3)]) |
| self.grid=cnlti(nx.grid_2d_graph(4,4),first_label=1) |
| |
| def test_connected_components(self): |
| cc=nx.connected_components |
| G=self.G |
| C=[[0, 1, 2, 3], [4, 5, 6, 7, 8, 9], [10, 11, 12, 13, 14]] |
| assert_equal(sorted([sorted(g) for g in cc(G)]),sorted(C)) |
| |
| def test_number_connected_components(self): |
| ncc=nx.number_connected_components |
| assert_equal(ncc(self.G),3) |
| |
| def test_number_connected_components2(self): |
| ncc=nx.number_connected_components |
| assert_equal(ncc(self.grid),1) |
| |
| def test_connected_components2(self): |
| cc=nx.connected_components |
| G=self.grid |
| C=[[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]] |
| assert_equal(sorted([sorted(g) for g in cc(G)]),sorted(C)) |
| |
| def test_node_connected_components(self): |
| ncc=nx.node_connected_component |
| G=self.grid |
| C=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16] |
| assert_equal(sorted(ncc(G,1)),sorted(C)) |
| |
| def test_connected_component_subgraphs(self): |
| G=self.grid |
| G.add_edge(1,2,eattr='red') # test attributes copied to subgraphs |
| G.node[1]['nattr']='blue' |
| G.graph['gattr']='green' |
| ccs=nx.connected_component_subgraphs(G) |
| assert_equal(len(ccs),1) |
| sg=ccs[0] |
| assert_equal(sorted(sg.nodes()),list(range(1,17))) |
| assert_equal(sg[1][2]['eattr'],'red') |
| assert_equal(sg.node[1]['nattr'],'blue') |
| assert_equal(sg.graph['gattr'],'green') |
| sg[1][2]['eattr']='blue' |
| assert_equal(G[1][2]['eattr'],'red') |
| assert_equal(sg[1][2]['eattr'],'blue') |
| |
| |
| def test_is_connected(self): |
| assert_true(nx.is_connected(self.grid)) |
| G=nx.Graph() |
| G.add_nodes_from([1,2]) |
| assert_false(nx.is_connected(G)) |
| |
| def test_connected_raise(self): |
| assert_raises(NetworkXError,nx.connected_components,self.DG) |
| assert_raises(NetworkXError,nx.number_connected_components,self.DG) |
| assert_raises(NetworkXError,nx.connected_component_subgraphs,self.DG) |
| assert_raises(NetworkXError,nx.node_connected_component,self.DG,1) |
| assert_raises(NetworkXError,nx.is_connected,self.DG) |
