def test_pre_post(self):
node = DfsNode()
node.setPreVisit(11)
node.setPostVisit(22)
self.assertEqual(node.getPreVisit(), 11)
self.assertEqual(node.getPostVisit(), 22)
def test_pre_post_raise(self):
node = DfsNode()
node.setPreVisit(11)
self.assertRaises(Exception, node.setPostVisit, 10)
self.assertRaises(Exception, node.setPostVisit, 11)
def test_init(self):
node = DfsNode()
self.assertEqual(node.getColor(), DfsNode.White)
self.assertEqual(node.getPreVisit(), -1)
self.assertEqual(node.getPostVisit(), -1)