class NodeAddAndRemoveTestCase(unittest.TestCase):
def setUp(self):
self.bn = BayesNet()
def tearDown(self):
self.bn = None
def test_clear_and_len(self):
self.assertFalse(0 == len(self.bn))
self.assertFalse(0 == self.bn.number_of_nodes())
self.bn.clear()
self.assertEqual(0, len(self.bn))
self.assertEqual(0, self.bn.number_of_nodes())
def test_add_node(self):
self.bn.clear()
n = DiscreteNode("Some Node", [True, False])
self.bn.add_node(n)
self.assertEqual(n, self.bn.get_node("Some Node"))
self.assertTrue(n in self.bn.get_nodes(["Some Node"]))
node_with_same_name = DiscreteNode("Some Node", [True, False])
self.assertRaises(Exception, self.bn.add_node, node_with_same_name)
def test_remove_node(self):
self.bn.clear()
n = DiscreteNode("Some Node to remove", [True, False])
self.bn.add_node(n)
self.bn.remove_node(n)
self.assertFalse(n in self.bn.get_nodes([]))
def test_add_edge(self):
self.bn.clear()
n1 = DiscreteNode("1", [True, False])
n2 = DiscreteNode("2", [True, False])
self.bn.add_node(n1)
self.bn.add_node(n2)
self.bn.add_edge(n1, n2)
self.assertTrue(n1 in self.bn.get_parents(n2))
self.assertTrue(n2 in self.bn.get_children(n1))
def test_remove_edge(self):
self.bn.clear()
n1 = DiscreteNode("1", [True, False])
n2 = DiscreteNode("2", [True, False])
self.bn.add_node(n1)
self.bn.add_node(n2)
self.bn.add_edge(n1, n2)
self.assertEqual([n1], self.bn.get_parents(n2))
self.bn.remove_edge(n1, n2)
self.assertEqual([], self.bn.get_parents(n2))
def test_is_valid(self):
self.bn.clear()
n1 = DiscreteNode("1", [True, False])
n2 = DiscreteNode("2", [True, False])
self.bn.add_node(n1)
self.bn.add_node(n2)
self.bn.add_edge(n1, n2)
self.assertTrue(self.bn.is_valid())
self.bn.add_edge(n1, n1)
self.assertFalse(self.bn.is_valid())
self.bn.remove_edge(n1, n1)
self.assertTrue(self.bn.is_valid())
n3 = DiscreteNode("3", [True, False])
n4 = DiscreteNode("4", [True, False])
self.bn.add_node(n3)
self.bn.add_node(n4)
self.assertTrue(self.bn.is_valid())
self.bn.add_edge(n2, n3)
self.assertTrue(self.bn.is_valid())
self.bn.add_edge(n3, n4)
self.assertTrue(self.bn.is_valid())
self.bn.add_edge(n4, n1)
self.assertFalse(self.bn.is_valid())