pytest-race
https://github.com/idlesign/pytest-race
Description
Race conditions tester for pytest
Introduces start_race fixture to run race condition tests.
Requirements
- Python 3.7+
- pytest 2.9.0+
Usage
You can use start_race fixture in your tests as follows:
from time import sleep
ACCUMULATOR = 0 # This global var is race conditions prone.
def test_race(start_race):
from random import randint
def actual_test():
global ACCUMULATOR
increment = randint(1, 10000)
accumulator = ACCUMULATOR
sleep(1) # Simulate some lag.
ACCUMULATOR += increment
# By that moment ACCUMULATOR should have been updated
# by another thread. Let's try to prove it.
# Using simple `assert` as usual for pytest.
assert accumulator + increment == ACCUMULATOR
# Let's run `actual_test` in 2 threads.
start_race(threads_num=2, target=actual_test)start_race accepts the following arguments:
- threads_num - number of threads to run simultaneously.
- target - actual test callable to run in threads.
