circuitpython/tests/extmod/uasyncio_event_fair.py
Damien George c4935f3049 tests/extmod: Add uasyncio tests.
All .exp files are included because they require CPython 3.8 which may not
always be available.
2020-03-26 01:25:45 +11:00

41 lines
791 B
Python

# Test fairness of Event.set()
# That tasks which continuously wait on events don't take over the scheduler
try:
import uasyncio as asyncio
except ImportError:
try:
import asyncio
except ImportError:
print("SKIP")
raise SystemExit
async def task1(id):
for i in range(4):
print("sleep", id)
await asyncio.sleep(0)
async def task2(id, ev):
for i in range(4):
ev.set()
ev.clear()
print("wait", id)
await ev.wait()
async def main():
ev = asyncio.Event()
tasks = [
asyncio.create_task(task1(0)),
asyncio.create_task(task2(2, ev)),
asyncio.create_task(task1(1)),
asyncio.create_task(task2(3, ev)),
]
await tasks[1]
ev.set()
asyncio.run(main())