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import warnings
import unittest
from igraph import Graph
class AtlasTestBase:
def testPageRank(self):
for idx, g in enumerate(self.__class__.graphs):
try:
pr = g.pagerank()
except Exception as ex:
self.assertTrue(
False,
msg="PageRank calculation threw exception for graph #%d: %s"
% (idx, ex),
)
raise
if g.vcount() == 0:
self.assertEqual([], pr)
continue
self.assertAlmostEqual(
1.0,
sum(pr),
places=5,
msg="PageRank sum is not 1.0 for graph #%d (%r)" % (idx, pr),
)
self.assertTrue(
min(pr) >= 0,
msg="Minimum PageRank is less than 0 for graph #%d (%r)" % (idx, pr),
)
def testEigenvectorCentrality(self):
# Temporarily turn off the warning handler because g.evcent() will print
# a warning for DAGs
warnings.simplefilter("ignore")
try:
for idx, g in enumerate(self.__class__.graphs):
try:
ec, eval = g.evcent(return_eigenvalue=True)
except Exception as ex:
self.assertTrue(
False,
msg="Eigenvector centrality threw exception for graph #%d: %s"
% (idx, ex),
)
raise
if g.vcount() == 0:
self.assertEqual([], ec)
continue
if not g.is_connected():
# Skip disconnected graphs; this will be fixed in igraph 0.7
continue
n = g.vcount()
if abs(eval) < 1e-4:
self.assertTrue(
min(ec) >= -1e-10,
msg="Minimum eigenvector centrality is smaller than 0 for graph #%d"
% idx,
)
self.assertTrue(
max(ec) <= 1,
msg="Maximum eigenvector centrality is greater than 1 for graph #%d"
% idx,
)
continue
self.assertAlmostEqual(
max(ec),
1,
places=7,
msg="Maximum eigenvector centrality is %r (not 1) for graph #%d (%r)"
% (max(ec), idx, ec),
)
self.assertTrue(
min(ec) >= 0,
msg="Minimum eigenvector centrality is less than 0 for graph #%d"
% idx,
)
ec2 = [sum(ec[u.index] for u in v.predecessors()) for v in g.vs]
for i in range(n):
self.assertAlmostEqual(
ec[i] * eval,
ec2[i],
places=7,
msg="Eigenvector centrality in graph #%d seems to be invalid "
"for vertex %d" % (idx, i),
)
finally:
# Reset the warning handler
warnings.resetwarnings()
def testHubScore(self):
for idx, g in enumerate(self.__class__.graphs):
try:
sc = g.hub_score()
except Exception as ex:
self.assertTrue(
False,
msg="Hub score calculation threw exception for graph #%d: %s"
% (idx, ex),
)
raise
if g.vcount() == 0:
self.assertEqual([], sc)
continue
self.assertAlmostEqual(
max(sc),
1,
places=7,
msg="Maximum authority score is not 1 for graph #%d" % idx,
)
self.assertTrue(
min(sc) >= 0, msg="Minimum hub score is less than 0 for graph #%d" % idx
)
def testAuthorityScore(self):
for idx, g in enumerate(self.__class__.graphs):
try:
sc = g.authority_score()
except Exception as ex:
self.assertTrue(
False,
msg="Authority score calculation threw exception for graph #%d: %s"
% (idx, ex),
)
raise
if g.vcount() == 0:
self.assertEqual([], sc)
continue
self.assertAlmostEqual(
max(sc),
1,
places=7,
msg="Maximum authority score is not 1 for graph #%d" % idx,
)
self.assertTrue(
min(sc) >= 0,
msg="Minimum authority score is less than 0 for graph #%d" % idx,
)
class GraphAtlasTests(unittest.TestCase, AtlasTestBase):
graphs = [Graph.Atlas(i) for i in range(1253)]
# Skip some problematic graphs
GraphAtlasTests.graphs = [
g for idx, g in enumerate(GraphAtlasTests.graphs) if idx not in {70, 180}
]
class IsoclassTests(unittest.TestCase, AtlasTestBase):
graphs = [Graph.Isoclass(3, i, directed=True) for i in range(16)] + [
Graph.Isoclass(4, i, directed=True) for i in range(218)
]
# Skip some problematic graphs
IsoclassTests.graphs = [
g for idx, g in enumerate(IsoclassTests.graphs) if idx not in {136}
]
def suite():
atlas_suite = unittest.defaultTestLoader.loadTestsFromTestCase(GraphAtlasTests)
isoclass_suite = unittest.defaultTestLoader.loadTestsFromTestCase(IsoclassTests)
return unittest.TestSuite([atlas_suite, isoclass_suite])
def test():
runner = unittest.TextTestRunner()
runner.run(suite())
if __name__ == "__main__":
test()
|
