@Test
public void testUndirectedClear() {
FlexibleUndirectedGraph graph = new FlexibleUndirectedGraph();
int nodes = 52;
for (int i = 0; i < nodes; i++) {
graph.addNode();
}
int[][] edges = new int[][] { { 0, 9 }, { 0, 10 }, { 0, 11 },
{ 0, 12 }, { 0, 13 }, { 0, 17 }, { 0, 18 }, { 0, 19 },
{ 0, 20 }, { 0, 24 }, { 0, 30 }, { 0, 41 }, { 0, 45 },