def test_valid(self):
base, multiplier, limit = 2, 3, 2
out = list(exponential(base, multiplier, limit)())
self.assertEqual([3, 6], out)
def test_zero_limit(self):
base, multiplier, limit = 1, 1, 0
out = list(exponential(base, multiplier, limit)())
self.assertEqual([], out)
def test_zero_multiplier(self):
base, multiplier, limit = 1, 0, 2
out = list(exponential(base, multiplier, limit)())
self.assertEqual([0, 0], out)
def test_negative_limit(self):
base, multiplier, limit = 1, 1, -1
with self.assertRaises(ValueError):
list(exponential(base, multiplier, limit)())
def test_zero_base(self):
base, multiplier, limit = 0, 1, 2
out = list(exponential(base, multiplier, limit)())
self.assertEqual([1, 0], out)