55 lines
1.4 KiB
Python
55 lines
1.4 KiB
Python
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'''
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``async with ():`` inlined context-stream cancellation testing.
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Verify the we raise errors when streams are opened prior to sync-opening
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a ``tractor.Context`` beforehand.
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'''
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import trio
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from trio.lowlevel import current_task
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import tractor
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@tractor.context
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async def never_open_stream(
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ctx: tractor.Context,
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) -> None:
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'''Bidir streaming endpoint which will stream
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back any sequence it is sent item-wise.
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'''
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await ctx.started()
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await trio.sleep_forever()
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def test_no_far_end_stream_opened():
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'''
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This should exemplify the bug from:
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https://github.com/goodboy/tractor/issues/265
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'''
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async def main():
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async with tractor.open_nursery() as n:
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portal = await n.start_actor(
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'starts_no_stream',
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enable_modules=[__name__],
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)
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async with (
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portal.open_context(
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never_open_stream,) as (ctx, sent),
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ctx.open_stream() as stream,
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):
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assert sent is None
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# XXX: so the question is whether
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# this should error if the far end
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# has not yet called `ctx.open_stream()`?
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# If we decide to do that we need a synchronization
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# message which is sent from that call?
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await stream.send('yo')
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trio.run(main)
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