from nose.tools import *

import networkx as nx


def test_unionfind():
    # Fixed by: 2cddd5958689bdecdcd89b91ac9aaf6ce0e4f6b8
    # Previously (in 2.x), the UnionFind class could handle mixed types.
    # But in Python 3.x, this causes a TypeError such as:
    #   TypeError: unorderable types: str() > int()
    #
    # Now we just make sure that no exception is raised.
    x = nx.utils.UnionFind()
    x.union(0, 'a')