@Test
public void testConstruction() {
UndirectedGraph abc = new UndirectedGraph();
assertEquals(0, abc.size());
assertTrue(abc.isEmpty());
assertEquals(Arrays.asList(), abc.getNodes());
}
@Test
public void testCombined() {
UndirectedGraphNode a = new UndirectedGraphNode("A");
UndirectedGraphNode b = new UndirectedGraphNode("B");
UndirectedGraphNode c = new UndirectedGraphNode("C");
test.addNode(a);
assertEquals(1, test.size());
test.addNode(b);
assertEquals(2, test.size());
test.addNode(c);
assertEquals(3, test.size());
assertEquals(Arrays.asList(a, b, c), test.getNodes());
test.removeNode(a);
// System.out.println(test.getNodes());
assertEquals(2, test.size());
test.removeNode(b);
// System.out.println(test.getNodes());
assertEquals(1, test.size());
test.removeNode(c);
// System.out.println(test.getNodes());
assertEquals(0, test.size());
assertTrue(test.isEmpty());
}