def test_simple_case(self):
self.assertEqual([
(3, 0, 0),
(2, 1, 0),
(1, 2, 0),
(2, 0, 1),
(1, 1, 1),
(1, 0, 2),
], list(vectors3(3)))
def test_sums(self):
sums = [sum(t) for t in vectors3(5)]
self.assertEqual(15, len(sums))
self.assertTrue(all(v == 5 for v in sums))
