def testRandomFunction(self):
# since this is a random statistical test there is a chance
# it could readily fail. The threshold was chosen to be
# what seems to be well out of normal range of firing, but
# in randomness anything is possible.
test_size = 100000
threshold = 0.003
probabilities = [0, 0.02, 0.5, 0.9, 1]
for probability in probabilities:
truecount = 0
falsecount = 0
while truecount + falsecount < test_size:
if predictable_random(uid.new(), probability):
truecount += 1
else:
falsecount += 1
calculated_probability = float(truecount) / float(test_size)
self.assertTrue(probability - threshold < calculated_probability)
self.assertTrue(probability + threshold > calculated_probability)
