'Tests for joining multiple subtrees at a root node.'

def test_basic(self):

    trees = [(nx.full_rary_tree(2, ((2 ** 2) - 1)), 0) for i in range(2)]
    actual = nx.join(trees)
    expected = nx.full_rary_tree(2, ((2 ** 3) - 1))
    assert_true(nx.is_isomorphic(actual, expected))
