import pytest
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from functools import wraps, partial
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import inspect
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import types
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@types.coroutine
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def mock_sleep():
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yield "mock_sleep"
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# Wrap any 'async def' tests so that they get automatically iterated.
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# We used to use pytest-asyncio as a convenient way to do this, but nowadays
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# pytest-asyncio uses us! In addition to it being generally bad for our test
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# infrastructure to depend on the code-under-test, this totally messes up
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# coverage info because depending on pytest's plugin load order, we might get
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# imported before pytest-cov can be loaded and start gathering coverage.
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@pytest.hookimpl(tryfirst=True)
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def pytest_pyfunc_call(pyfuncitem):
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if inspect.iscoroutinefunction(pyfuncitem.obj):
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fn = pyfuncitem.obj
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@wraps(fn)
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def wrapper(**kwargs):
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coro = fn(**kwargs)
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try:
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while True:
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value = coro.send(None)
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if value != "mock_sleep": # pragma: no cover
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raise RuntimeError(
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"coroutine runner confused: {!r}".format(value)
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)
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except StopIteration:
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pass
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pyfuncitem.obj = wrapper
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