'``backoff`` has sane default arguments:'

def test_defaults(self):

    expected_values = map(float, [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 60, 60, 60])
    actual_values = list(backoff())
    self.assertNotEqual(expected_values, actual_values)
    rounded_values = map(round, actual_values)
    self.assertEqual(expected_values, rounded_values)
    self.assertEqual(570.0, sum(rounded_values))
