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import unittest
from igraph import Graph, Layout
class HomepageExampleTests(unittest.TestCase):
"""Smoke tests for the Python examples found on the homepage to ensure
that they do not break."""
def testErdosRenyiComponents(self):
g = Graph.Erdos_Renyi(n=300, m=250)
colors = ["lightgray", "cyan", "magenta", "yellow", "blue", "green", "red"]
components = g.components()
for component in components:
color = colors[min(6, len(components) - 1)]
g.vs[component]["color"] = color
# No plotting here, but we calculate the FR layout
g.layout("fr")
def testKautz(self):
g = Graph.Kautz(m=3, n=2)
g.get_adjacency()
# Plotting omitted
def testMSTofGRG(self):
def distance(p1, p2):
return ((p1[0] - p2[0]) ** 2 + (p1[1] - p2[1]) ** 2) ** 0.5
g = Graph.GRG(100, 0.2)
layout = Layout(list(zip(g.vs["x"], g.vs["y"])))
weights = [distance(layout[edge.source], layout[edge.target]) for edge in g.es]
max_weight = max(weights)
g.es["width"] = [6 - 5 * weight / max_weight for weight in weights]
g.spanning_tree(weights)
# Plotting omitted
def suite():
homepage_example_suite = unittest.defaultTestLoader.loadTestsFromTestCase(
HomepageExampleTests
)
return unittest.TestSuite([homepage_example_suite])
def test():
runner = unittest.TextTestRunner()
runner.run(suite())
if __name__ == "__main__":
test()
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