File size: 1,121 Bytes
5631464 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | """Test libmath."""
import pytest
from haddock.libs.libmath import RandomNumberGenerator
@pytest.mark.parametrize(
"lower,upper",
[
(0, 9),
(100, 99999), # the range used for CNS seeds in libcns
(5, 5), # degenerate single-value range
(-3, 3),
],
)
def test_randint_stays_within_bounds(lower, upper):
"""randint must never return a value outside [lower, upper]."""
rng = RandomNumberGenerator()
for _ in range(10000):
value = rng.randint(lower, upper)
assert lower <= value <= upper
def test_randint_is_reproducible_for_same_seed():
"""Same seed must yield the same sequence."""
rng_a = RandomNumberGenerator(seed=42)
rng_b = RandomNumberGenerator(seed=42)
seq_a = [rng_a.randint(100, 99999) for _ in range(50)]
seq_b = [rng_b.randint(100, 99999) for _ in range(50)]
assert seq_a == seq_b
def test_randint_covers_full_range():
"""Both endpoints must be reachable across enough samples."""
rng = RandomNumberGenerator()
values = {rng.randint(0, 3) for _ in range(2000)}
assert values == {0, 1, 2, 3}
|