aboutsummaryrefslogtreecommitdiff
path: root/.venv/lib/python3.12/site-packages/networkx/algorithms/community/tests/test_lukes.py
diff options
context:
space:
mode:
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.py152
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
+ )