graphrag/tests/unit/indexing/graph/utils/test_stable_lcc.py
Nathan Evans 04d9f585c8
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Re-implement hierarchical Leiden (#2049)
* Use graspologic-native hierarchical leiden

* Re-implement largest_connected_component

* Copy in modularity

* Use graspologic-native directly in pyproject

* Remove directed graph tests (we don't use this)

* Semver

* Remove graspologic dep
2025-09-09 16:26:07 -07:00

46 lines
1.7 KiB
Python

# Copyright (c) 2024 Microsoft Corporation.
# Licensed under the MIT License
import unittest
import networkx as nx
from graphrag.index.utils.stable_lcc import stable_largest_connected_component
class TestStableLCC(unittest.TestCase):
def test_undirected_graph_run_twice_produces_same_graph(self):
graph_in_1 = self._create_strongly_connected_graph()
graph_out_1 = stable_largest_connected_component(graph_in_1)
graph_in_2 = self._create_strongly_connected_graph_with_edges_flipped()
graph_out_2 = stable_largest_connected_component(graph_in_2)
# Make sure they're the same
assert "".join(nx.generate_graphml(graph_out_1)) == "".join(
nx.generate_graphml(graph_out_2)
)
def _create_strongly_connected_graph(self, digraph=False):
graph = nx.Graph() if not digraph else nx.DiGraph()
graph.add_node("1", node_name=1)
graph.add_node("2", node_name=2)
graph.add_node("3", node_name=3)
graph.add_node("4", node_name=4)
graph.add_edge("4", "5", degree=4)
graph.add_edge("3", "4", degree=3)
graph.add_edge("2", "3", degree=2)
graph.add_edge("1", "2", degree=1)
return graph
def _create_strongly_connected_graph_with_edges_flipped(self, digraph=False):
graph = nx.Graph() if not digraph else nx.DiGraph()
graph.add_node("1", node_name=1)
graph.add_node("2", node_name=2)
graph.add_node("3", node_name=3)
graph.add_node("4", node_name=4)
graph.add_edge("5", "4", degree=4)
graph.add_edge("4", "3", degree=3)
graph.add_edge("3", "2", degree=2)
graph.add_edge("2", "1", degree=1)
return graph