def test_2_pence_known_case(self):
'''
test the known case for 2 pence
2 pence only has a limited combination of coin combos:
2p
1p + 1p
'''
self.assertEqual(coin_sum_combos(2), 2)
def test_5_pence_known_case(self):
'''
test the known case for 5 pence
5 pence only has a limited combination of coin combos:
5p
2p + 2p + 1p
2p + 1p + 1p + 1p
1p + 1p + 1p + 1p + 1p
So that's 4 different combinations
'''
self.assertEqual(coin_sum_combos(5), 4)