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[master] / tests / test-set_prng_seed-env.py 

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"""
Test that we get reproducible results when setting PRNG seed via the
environment.
"""

# Set the environment variable _before_ initializing the library.
import os

os.environ["FIU_PRNG_SEED"] = "1234"

import fiu

fiu.enable_random("p1", probability=0.5)
result = {True: 0, False: 0}
for i in range(1000):
    result[fiu.fail("p1")] += 1

assert result == {False: 516, True: 484}, result