def test_5_choose_2(self):
self.assertEqual(wordlib.combinations(5, 2), 10)
def test_n_choose_n(self):
"""
This case is part of why combinations are much faster.
"""
self.assertEqual(wordlib.combinations(5, 5), 1)
def test_5_choose_1(self):
self.assertEqual(wordlib.combinations(5, 1), 5)
