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Diffstat (limited to '.venv/lib/python3.12/site-packages/networkx/algorithms/community/tests/test_lukes.py')
-rw-r--r-- | .venv/lib/python3.12/site-packages/networkx/algorithms/community/tests/test_lukes.py | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/networkx/algorithms/community/tests/test_lukes.py b/.venv/lib/python3.12/site-packages/networkx/algorithms/community/tests/test_lukes.py new file mode 100644 index 00000000..cfa48f0f --- /dev/null +++ b/.venv/lib/python3.12/site-packages/networkx/algorithms/community/tests/test_lukes.py @@ -0,0 +1,152 @@ +from itertools import product + +import pytest + +import networkx as nx + +EWL = "e_weight" +NWL = "n_weight" + + +# first test from the Lukes original paper +def paper_1_case(float_edge_wt=False, explicit_node_wt=True, directed=False): + # problem-specific constants + limit = 3 + + # configuration + if float_edge_wt: + shift = 0.001 + else: + shift = 0 + + if directed: + example_1 = nx.DiGraph() + else: + example_1 = nx.Graph() + + # graph creation + example_1.add_edge(1, 2, **{EWL: 3 + shift}) + example_1.add_edge(1, 4, **{EWL: 2 + shift}) + example_1.add_edge(2, 3, **{EWL: 4 + shift}) + example_1.add_edge(2, 5, **{EWL: 6 + shift}) + + # node weights + if explicit_node_wt: + nx.set_node_attributes(example_1, 1, NWL) + wtu = NWL + else: + wtu = None + + # partitioning + clusters_1 = { + frozenset(x) + for x in nx.community.lukes_partitioning( + example_1, limit, node_weight=wtu, edge_weight=EWL + ) + } + + return clusters_1 + + +# second test from the Lukes original paper +def paper_2_case(explicit_edge_wt=True, directed=False): + # problem specific constants + byte_block_size = 32 + + # configuration + if directed: + example_2 = nx.DiGraph() + else: + example_2 = nx.Graph() + + if explicit_edge_wt: + edic = {EWL: 1} + wtu = EWL + else: + edic = {} + wtu = None + + # graph creation + example_2.add_edge("name", "home_address", **edic) + example_2.add_edge("name", "education", **edic) + example_2.add_edge("education", "bs", **edic) + example_2.add_edge("education", "ms", **edic) + example_2.add_edge("education", "phd", **edic) + example_2.add_edge("name", "telephone", **edic) + example_2.add_edge("telephone", "home", **edic) + example_2.add_edge("telephone", "office", **edic) + example_2.add_edge("office", "no1", **edic) + example_2.add_edge("office", "no2", **edic) + + example_2.nodes["name"][NWL] = 20 + example_2.nodes["education"][NWL] = 10 + example_2.nodes["bs"][NWL] = 1 + example_2.nodes["ms"][NWL] = 1 + example_2.nodes["phd"][NWL] = 1 + example_2.nodes["home_address"][NWL] = 8 + example_2.nodes["telephone"][NWL] = 8 + example_2.nodes["home"][NWL] = 8 + example_2.nodes["office"][NWL] = 4 + example_2.nodes["no1"][NWL] = 1 + example_2.nodes["no2"][NWL] = 1 + + # partitioning + clusters_2 = { + frozenset(x) + for x in nx.community.lukes_partitioning( + example_2, byte_block_size, node_weight=NWL, edge_weight=wtu + ) + } + + return clusters_2 + + +def test_paper_1_case(): + ground_truth = {frozenset([1, 4]), frozenset([2, 3, 5])} + + tf = (True, False) + for flt, nwt, drc in product(tf, tf, tf): + part = paper_1_case(flt, nwt, drc) + assert part == ground_truth + + +def test_paper_2_case(): + ground_truth = { + frozenset(["education", "bs", "ms", "phd"]), + frozenset(["name", "home_address"]), + frozenset(["telephone", "home", "office", "no1", "no2"]), + } + + tf = (True, False) + for ewt, drc in product(tf, tf): + part = paper_2_case(ewt, drc) + assert part == ground_truth + + +def test_mandatory_tree(): + not_a_tree = nx.complete_graph(4) + + with pytest.raises(nx.NotATree): + nx.community.lukes_partitioning(not_a_tree, 5) + + +def test_mandatory_integrality(): + byte_block_size = 32 + + ex_1_broken = nx.DiGraph() + + ex_1_broken.add_edge(1, 2, **{EWL: 3.2}) + ex_1_broken.add_edge(1, 4, **{EWL: 2.4}) + ex_1_broken.add_edge(2, 3, **{EWL: 4.0}) + ex_1_broken.add_edge(2, 5, **{EWL: 6.3}) + + ex_1_broken.nodes[1][NWL] = 1.2 # ! + ex_1_broken.nodes[2][NWL] = 1 + ex_1_broken.nodes[3][NWL] = 1 + ex_1_broken.nodes[4][NWL] = 1 + ex_1_broken.nodes[5][NWL] = 2 + + with pytest.raises(TypeError): + nx.community.lukes_partitioning( + ex_1_broken, byte_block_size, node_weight=NWL, edge_weight=EWL + ) |