def test_deep_copy(self):
v_a = Vertex()
v_b = Vertex()
e = Edge(v_a, v_b)
g = Graph([v_a, v_b], [e])
g_copy = deepcopy(g)
self.assertIsNot(g, g_copy)
e = g.get_edges().pop()
e_copy = g_copy.E.pop()
self.assertIsNot(e, e_copy)
self.assertEqual(e.get_value(), e_copy.get_value())
self.assertIsNot(e.get_vertices(), e_copy.get_vertices())
self.assertEqual([v.get_value() for v in e.get_vertices()],
[v.get_value() for v in e_copy.get_vertices()])
[v.set_value(1) for v in e.get_vertices()]
[v.set_value(2) for v in e_copy.get_vertices()]
self.assertNotEqual([v.get_value() for v in e.get_vertices()],
[v.get_value() for v in e_copy.get_vertices()])
e.set_value(1)
e_copy.set_value(2)
self.assertEqual(e.get_value(), 1)
self.assertEqual(e_copy.get_value(), 2)
self.assertEqual(len(g.get_vertices().intersection(g_copy.V)), 0)
def test_one_edge(self):
v_zero = Vertex(0)
v_one = Vertex(1)
e = Edge(v_zero, v_one)
self.assertIs(e.get_value(), None)
self.assertIsInstance(Graph([v_zero, v_one], [e]), Graph)
