def test_exponential_backoff_with_jitter(self):
backoff = standard.ExponentialBackoff()
backoffs = [
backoff.delay_amount(standard.RetryContext(attempt_number=3))
for i in range(10)
]
# For attempt number 3, we should have a max value of 4 (2 ^ 2),
# so we can assert all the backoff values are within that range.
for x in backoffs:
self.assertTrue(0 <= x <= 4)
def setUp(self):
self.random = lambda: 1
self.backoff = standard.ExponentialBackoff(max_backoff=20,
random=self.random)