def test_max_delay_none(self):
strategy = _exponential_backoff(retries=7,
delay=1,
backoff=2,
max_delay=None)
result = list(strategy())
self.assertEqual(result, [1, 2, 4, 8, 16, 32, 64])
def test_exponential_backoff(self):
strategy = _exponential_backoff(retries=5, delay=1, backoff=2)
result = list(strategy())
self.assertEqual(result, [1, 2, 4, 8, 16])
def test_no_retries(self):
strategy = _exponential_backoff(retries=0)
result = list(strategy())
self.assertEqual(result, [], 'list should be empty')