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"""Unit tests for the :mod:`networkx.generators.cographs` module.
"""
import networkx as nx
def test_random_cograph():
n = 3
G = nx.random_cograph(n)
assert len(G) == 2**n
# Every connected subgraph of G has diameter <= 2
if nx.is_connected(G):
assert nx.diameter(G) <= 2
else:
components = nx.connected_components(G)
for component in components:
assert nx.diameter(G.subgraph(component)) <= 2
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