def test_006_xoroshiro128p_reproducibility(self):
"""
Make sure two RNGs with the same seed yield the same
sequence
"""
seed = 123456
N = 10000
rng1 = gr.xoroshiro128p_prng(123456)
rng2 = gr.xoroshiro128p_prng(123456)
self.assertSequenceEqual(tuple(rng1() for _ in range(N)),
tuple(rng2() for _ in range(N)))
def test_005_xoroshiro128p_seed_stability(self):
"""
Test that seeding is stable.
It's basically an API break if it isn't.
We simply check for the first value of a sequence
being the same as it was when the module was integrated.
"""
rng = gr.xoroshiro128p_prng(42)
self.assertEqual(3520422898491873512, rng())
def test_007_xoroshiro128p_range(self):
"""
Check bounds.
Check whether a long sequence of values are within that bounds.
"""
N = 10**6
self.assertEqual(gr.xoroshiro128p_prng.min(), 0)
self.assertEqual(gr.xoroshiro128p_prng.max(), 2**64 - 1)
rng = gr.xoroshiro128p_prng(42)
arr = all((0 <= rng() <= 2**64 - 1 for _ in range(N)))
self.assertTrue(arr)