def test_adjacent(self):
g = Graph(range(3))
g.add_edge(0, 1)
self.assertTrue(g.adjacent(0, 1))
self.assertFalse(g.adjacent(1, 2))
def test_adjacent(self):
g = Graph(range(3))
g.add_edge(0, 1)
self.assertTrue(g.adjacent(0, 1))
self.assertFalse(g.adjacent(1, 2))
