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53 lines
1.3 KiB
Python
53 lines
1.3 KiB
Python
import contextvars
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from .. import _core
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trio_testing_contextvar = contextvars.ContextVar("trio_testing_contextvar")
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async def test_contextvars_default():
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trio_testing_contextvar.set("main")
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record = []
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async def child():
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value = trio_testing_contextvar.get()
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record.append(value)
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async with _core.open_nursery() as nursery:
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nursery.start_soon(child)
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assert record == ["main"]
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async def test_contextvars_set():
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trio_testing_contextvar.set("main")
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record = []
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async def child():
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trio_testing_contextvar.set("child")
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value = trio_testing_contextvar.get()
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record.append(value)
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async with _core.open_nursery() as nursery:
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nursery.start_soon(child)
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value = trio_testing_contextvar.get()
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assert record == ["child"]
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assert value == "main"
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async def test_contextvars_copy():
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trio_testing_contextvar.set("main")
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context = contextvars.copy_context()
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trio_testing_contextvar.set("second_main")
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record = []
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async def child():
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value = trio_testing_contextvar.get()
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record.append(value)
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async with _core.open_nursery() as nursery:
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context.run(nursery.start_soon, child)
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nursery.start_soon(child)
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value = trio_testing_contextvar.get()
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assert set(record) == {"main", "second_main"}
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assert value == "second_main"
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