54 lines
1.3 KiB
Python
54 lines
1.3 KiB
Python
# Test uasyncio.gather() function, features that are not implemented.
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try:
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import uasyncio as asyncio
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except ImportError:
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try:
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import asyncio
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except ImportError:
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print("SKIP")
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raise SystemExit
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def custom_handler(loop, context):
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print(repr(context["exception"]))
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async def task(id):
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print("task start", id)
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await asyncio.sleep(0.01)
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print("task end", id)
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return id
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async def gather_task(t0, t1):
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print("gather_task start")
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await asyncio.gather(t0, t1)
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print("gather_task end")
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async def main():
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loop = asyncio.get_event_loop()
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loop.set_exception_handler(custom_handler)
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# Test case where can't wait on a task being gathered.
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tasks = [asyncio.create_task(task(1)), asyncio.create_task(task(2))]
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gt = asyncio.create_task(gather_task(tasks[0], tasks[1]))
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await asyncio.sleep(0) # let the gather start
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try:
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await tasks[0] # can't await because this task is part of the gather
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except RuntimeError as er:
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print(repr(er))
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await gt
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print("====")
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# Test case where can't gather on a task being waited.
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tasks = [asyncio.create_task(task(1)), asyncio.create_task(task(2))]
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asyncio.create_task(gather_task(tasks[0], tasks[1]))
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await tasks[0] # wait on this task before the gather starts
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await tasks[1]
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asyncio.run(main())
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