def test_0():
sol = Solution()
assert sol.cloneGraph(None) is None
g1 = UndirectedGraphNode(2)
g2 = sol.cloneGraph(g1)
assert graph_eq(g1, g2)
g1.label = 3
assert not graph_eq(g1, g2)
def test_1():
sol = Solution()
n1 = UndirectedGraphNode(1)
n0 = UndirectedGraphNode(0)
n2 = UndirectedGraphNode(2)
n1.neighbors = [n0, n2]
n0.neighbors = [n1, n2]
n2.neighbors = [n0, n1, n2]
c1 = sol.cloneGraph(n1)
assert graph_eq(n1, c1)
n0.label = 9
assert not graph_eq(n1, c1)
