def test_too_high(self):
rank = lambda: intro.rank(10, [1, 2, 3], 0, 700)
self.assertRaises(ValueError, rank)
def test_key_below_middle(self):
rank = intro.rank(3, [1, 2, 3, 7, 9, 10, 11])
self.assertEqual(rank, 2)
def test_not_in(self):
rank = intro.rank(55, [1, 2, 10, 100, 700])
self.assertEqual(rank, -1)
def test_key_above_middle(self):
rank = intro.rank(5, [1, 2, 5, 10])
self.assertEqual(rank, 2)
