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# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
import unittest
import dns.entropy
# these tests are mostly for minimal coverage testing
class EntropyTestCase(unittest.TestCase):
def test_pool(self):
pool = dns.entropy.EntropyPool(b"seed-value")
self.assertEqual(pool.random_8(), 94)
self.assertEqual(pool.random_16(), 61532)
self.assertEqual(pool.random_32(), 4226376065)
self.assertEqual(pool.random_between(10, 50), 29)
# stir in some not-really-entropy to exercise the stir API
pool.stir(b"not-really-entropy")
def test_pool_random(self):
pool = dns.entropy.EntropyPool()
values = {pool.random_32() for n in range(12)}
# Make sure that the results are at least somewhat random.
self.assertGreater(len(values), 8)
def test_pool_random_between(self):
pool = dns.entropy.EntropyPool()
def bad():
pool.random_between(0, 4294967296)
self.assertRaises(ValueError, bad)
v = pool.random_between(50, 50 + 100000)
self.assertTrue(v >= 50 and v <= 50 + 100000)
v = pool.random_between(50, 50 + 10000)
self.assertTrue(v >= 50 and v <= 50 + 10000)
v = pool.random_between(50, 50 + 100)
self.assertTrue(v >= 50 and v <= 50 + 100)
def test_functions(self):
v = dns.entropy.random_16()
self.assertTrue(0 <= v <= 65535)
v = dns.entropy.between(10, 50)
self.assertTrue(10 <= v <= 50)
class EntropyForcePoolTestCase(unittest.TestCase):
def setUp(self):
self.saved_system_random = dns.entropy.system_random
dns.entropy.system_random = None
def tearDown(self):
dns.entropy.system_random = self.saved_system_random
def test_functions(self):
v = dns.entropy.random_16()
self.assertTrue(0 <= v <= 65535)
v = dns.entropy.between(10, 50)
self.assertTrue(10 <= v <= 50)
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