micropython/tests/extmod/urandom_basic.py

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

30 lines
658 B
Python
Raw Normal View History

try:
import urandom as random
except ImportError:
2017-02-14 22:56:22 +00:00
try:
import random
except ImportError:
print("SKIP")
raise SystemExit
# check getrandbits returns a value within the bit range
for b in (1, 2, 3, 4, 16, 32):
for i in range(50):
assert random.getrandbits(b) < (1 << b)
# check that seed(0) gives a non-zero value
random.seed(0)
print(random.getrandbits(16) != 0)
# check that PRNG is repeatable
random.seed(1)
r = random.getrandbits(16)
random.seed(1)
print(random.getrandbits(16) == r)
# check that it throws an error for zero bits
try:
random.getrandbits(0)
except ValueError:
print("ValueError")