Mercurial > repos > shellac > sam_consensus_v3
view env/lib/python3.9/site-packages/networkx/generators/tests/test_spectral_graph_forge.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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import pytest from networkx import is_isomorphic from networkx.exception import NetworkXError from networkx.testing import assert_nodes_equal from networkx.generators.spectral_graph_forge import spectral_graph_forge from networkx.generators import karate_club_graph def test_spectral_graph_forge(): numpy = pytest.importorskip("numpy") scipy = pytest.importorskip("scipy") G = karate_club_graph() seed = 54321 # common cases, just checking node number preserving and difference # between identity and modularity cases H = spectral_graph_forge(G, 0.1, transformation="identity", seed=seed) assert_nodes_equal(G, H) I = spectral_graph_forge(G, 0.1, transformation="identity", seed=seed) assert_nodes_equal(G, H) assert is_isomorphic(I, H) I = spectral_graph_forge(G, 0.1, transformation="modularity", seed=seed) assert_nodes_equal(G, I) assert not is_isomorphic(I, H) # with all the eigenvectors, output graph is identical to the input one H = spectral_graph_forge(G, 1, transformation="modularity", seed=seed) assert_nodes_equal(G, H) assert is_isomorphic(G, H) # invalid alpha input value, it is silently truncated in [0,1] H = spectral_graph_forge(G, -1, transformation="identity", seed=seed) assert_nodes_equal(G, H) H = spectral_graph_forge(G, 10, transformation="identity", seed=seed) assert_nodes_equal(G, H) assert is_isomorphic(G, H) # invalid transformation mode, checking the error raising pytest.raises( NetworkXError, spectral_graph_forge, G, 0.1, transformation="unknown", seed=seed )