#!/usr/bin/env python import pytest import networkx as nx from networkx import convert_node_labels_to_integers as cnlti class TestCliques: def setup_method(self): z = [3, 4, 3, 4, 2, 4, 2, 1, 1, 1, 1] self.G = cnlti(nx.generators.havel_hakimi_graph(z), first_label=1) self.cl = list(nx.find_cliques(self.G)) H = nx.complete_graph(6) H = nx.relabel_nodes(H, dict([(i, i + 1) for i in range(6)])) H.remove_edges_from([(2, 6), (2, 5), (2, 4), (1, 3), (5, 3)]) self.H = H def test_find_cliques1(self): cl = list(nx.find_cliques(self.G)) rcl = nx.find_cliques_recursive(self.G) expected = [[2, 6, 1, 3], [2, 6, 4], [5, 4, 7], [8, 9], [10, 11]] assert sorted(map(sorted, cl)) == sorted(map(sorted, rcl)) assert sorted(map(sorted, cl)) == sorted(map(sorted, expected)) def test_selfloops(self): self.G.add_edge(1, 1) cl = list(nx.find_cliques(self.G)) rcl = list(nx.find_cliques_recursive(self.G)) assert set(map(frozenset, cl)) == set(map(frozenset, rcl)) answer = [{2, 6, 1, 3}, {2, 6, 4}, {5, 4, 7}, {8, 9}, {10, 11}] assert len(answer) == len(cl) assert all(set(c) in answer for c in cl) def test_find_cliques2(self): hcl = list(nx.find_cliques(self.H)) assert (sorted(map(sorted, hcl)) == [[1, 2], [1, 4, 5, 6], [2, 3], [3, 4, 6]]) def test_clique_number(self): G = self.G assert nx.graph_clique_number(G) == 4 assert nx.graph_clique_number(G, cliques=self.cl) == 4 def test_clique_number2(self): G = nx.Graph() G.add_nodes_from([1, 2, 3]) assert nx.graph_clique_number(G) == 1 def test_clique_number3(self): G = nx.Graph() assert nx.graph_clique_number(G) == 0 def test_number_of_cliques(self): G = self.G assert nx.graph_number_of_cliques(G) == 5 assert nx.graph_number_of_cliques(G, cliques=self.cl) == 5 assert nx.number_of_cliques(G, 1) == 1 assert list(nx.number_of_cliques(G, [1]).values()) == [1] assert list(nx.number_of_cliques(G, [1, 2]).values()) == [1, 2] assert nx.number_of_cliques(G, [1, 2]) == {1: 1, 2: 2} assert nx.number_of_cliques(G, 2) == 2 assert (nx.number_of_cliques(G) == {1: 1, 2: 2, 3: 1, 4: 2, 5: 1, 6: 2, 7: 1, 8: 1, 9: 1, 10: 1, 11: 1}) assert (nx.number_of_cliques(G, nodes=list(G)) == {1: 1, 2: 2, 3: 1, 4: 2, 5: 1, 6: 2, 7: 1, 8: 1, 9: 1, 10: 1, 11: 1}) assert (nx.number_of_cliques(G, nodes=[2, 3, 4]) == {2: 2, 3: 1, 4: 2}) assert (nx.number_of_cliques(G, cliques=self.cl) == {1: 1, 2: 2, 3: 1, 4: 2, 5: 1, 6: 2, 7: 1, 8: 1, 9: 1, 10: 1, 11: 1}) assert (nx.number_of_cliques(G, list(G), cliques=self.cl) == {1: 1, 2: 2, 3: 1, 4: 2, 5: 1, 6: 2, 7: 1, 8: 1, 9: 1, 10: 1, 11: 1}) def test_node_clique_number(self): G = self.G assert nx.node_clique_number(G, 1) == 4 assert list(nx.node_clique_number(G, [1]).values()) == [4] assert list(nx.node_clique_number(G, [1, 2]).values()) == [4, 4] assert nx.node_clique_number(G, [1, 2]) == {1: 4, 2: 4} assert nx.node_clique_number(G, 1) == 4 assert (nx.node_clique_number(G) == {1: 4, 2: 4, 3: 4, 4: 3, 5: 3, 6: 4, 7: 3, 8: 2, 9: 2, 10: 2, 11: 2}) assert (nx.node_clique_number(G, cliques=self.cl) == {1: 4, 2: 4, 3: 4, 4: 3, 5: 3, 6: 4, 7: 3, 8: 2, 9: 2, 10: 2, 11: 2}) def test_cliques_containing_node(self): G = self.G assert (nx.cliques_containing_node(G, 1) == [[2, 6, 1, 3]]) assert (list(nx.cliques_containing_node(G, [1]).values()) == [[[2, 6, 1, 3]]]) assert ([sorted(c) for c in list(nx.cliques_containing_node(G, [1, 2]).values())] == [[[2, 6, 1, 3]], [[2, 6, 1, 3], [2, 6, 4]]]) result = nx.cliques_containing_node(G, [1, 2]) for k, v in result.items(): result[k] = sorted(v) assert (result == {1: [[2, 6, 1, 3]], 2: [[2, 6, 1, 3], [2, 6, 4]]}) assert (nx.cliques_containing_node(G, 1) == [[2, 6, 1, 3]]) expected = [{2, 6, 1, 3}, {2, 6, 4}] answer = [set(c) for c in nx.cliques_containing_node(G, 2)] assert answer in (expected, list(reversed(expected))) answer = [set(c) for c in nx.cliques_containing_node(G, 2, cliques=self.cl)] assert answer in (expected, list(reversed(expected))) assert len(nx.cliques_containing_node(G)) == 11 def test_make_clique_bipartite(self): G = self.G B = nx.make_clique_bipartite(G) assert (sorted(B) == [-5, -4, -3, -2, -1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]) # Project onto the nodes of the original graph. H = nx.project(B, range(1, 12)) assert H.adj == G.adj # Project onto the nodes representing the cliques. H1 = nx.project(B, range(-5, 0)) # Relabel the negative numbers as positive ones. H1 = nx.relabel_nodes(H1, {-v: v for v in range(1, 6)}) assert sorted(H1) == [1, 2, 3, 4, 5] def test_make_max_clique_graph(self): """Tests that the maximal clique graph is the same as the bipartite clique graph after being projected onto the nodes representing the cliques. """ G = self.G B = nx.make_clique_bipartite(G) # Project onto the nodes representing the cliques. H1 = nx.project(B, range(-5, 0)) # Relabel the negative numbers as nonnegative ones, starting at # 0. H1 = nx.relabel_nodes(H1, {-v: v - 1 for v in range(1, 6)}) H2 = nx.make_max_clique_graph(G) assert H1.adj == H2.adj def test_directed(self): with pytest.raises(nx.NetworkXNotImplemented): cliques = nx.find_cliques(nx.DiGraph()) class TestEnumerateAllCliques: def test_paper_figure_4(self): # Same graph as given in Fig. 4 of paper enumerate_all_cliques is # based on. # http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1559964&isnumber=33129 G = nx.Graph() edges_fig_4 = [('a', 'b'), ('a', 'c'), ('a', 'd'), ('a', 'e'), ('b', 'c'), ('b', 'd'), ('b', 'e'), ('c', 'd'), ('c', 'e'), ('d', 'e'), ('f', 'b'), ('f', 'c'), ('f', 'g'), ('g', 'f'), ('g', 'c'), ('g', 'd'), ('g', 'e')] G.add_edges_from(edges_fig_4) cliques = list(nx.enumerate_all_cliques(G)) clique_sizes = list(map(len, cliques)) assert sorted(clique_sizes) == clique_sizes expected_cliques = [['a'], ['b'], ['c'], ['d'], ['e'], ['f'], ['g'], ['a', 'b'], ['a', 'b', 'd'], ['a', 'b', 'd', 'e'], ['a', 'b', 'e'], ['a', 'c'], ['a', 'c', 'd'], ['a', 'c', 'd', 'e'], ['a', 'c', 'e'], ['a', 'd'], ['a', 'd', 'e'], ['a', 'e'], ['b', 'c'], ['b', 'c', 'd'], ['b', 'c', 'd', 'e'], ['b', 'c', 'e'], ['b', 'c', 'f'], ['b', 'd'], ['b', 'd', 'e'], ['b', 'e'], ['b', 'f'], ['c', 'd'], ['c', 'd', 'e'], ['c', 'd', 'e', 'g'], ['c', 'd', 'g'], ['c', 'e'], ['c', 'e', 'g'], ['c', 'f'], ['c', 'f', 'g'], ['c', 'g'], ['d', 'e'], ['d', 'e', 'g'], ['d', 'g'], ['e', 'g'], ['f', 'g'], ['a', 'b', 'c'], ['a', 'b', 'c', 'd'], ['a', 'b', 'c', 'd', 'e'], ['a', 'b', 'c', 'e']] assert (sorted(map(sorted, cliques)) == sorted(map(sorted, expected_cliques)))