| """Test libmath.""" |
|
|
| import pytest |
|
|
| from haddock.libs.libmath import RandomNumberGenerator |
|
|
|
|
| @pytest.mark.parametrize( |
| "lower,upper", |
| [ |
| (0, 9), |
| (100, 99999), |
| (5, 5), |
| (-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} |
|
|
