123 lines
3.7 KiB
Python
123 lines
3.7 KiB
Python
"""
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RPC related
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"""
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import itertools
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import pytest
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import tractor
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import trio
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async def sleep_back_actor(
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actor_name,
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func_name,
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func_defined,
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exposed_mods,
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):
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if actor_name:
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async with tractor.find_actor(actor_name) as portal:
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try:
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await portal.run(__name__, func_name)
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except tractor.RemoteActorError as err:
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if not func_defined:
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expect = AttributeError
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if not exposed_mods:
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expect = tractor.ModuleNotExposed
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assert err.type is expect
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raise
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else:
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await trio.sleep(float('inf'))
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async def short_sleep():
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await trio.sleep(0)
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@pytest.mark.parametrize(
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'to_call', [
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([], 'short_sleep', tractor.RemoteActorError),
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([__name__], 'short_sleep', tractor.RemoteActorError),
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([__name__], 'fake_func', tractor.RemoteActorError),
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(['tmp_mod'], 'import doggy', ModuleNotFoundError),
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(['tmp_mod'], '4doggy', SyntaxError),
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],
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ids=['no_mods', 'this_mod', 'this_mod_bad_func', 'fail_to_import',
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'fail_on_syntax'],
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)
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def test_rpc_errors(arb_addr, to_call, testdir):
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"""Test errors when making various RPC requests to an actor
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that either doesn't have the requested module exposed or doesn't define
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the named function.
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"""
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exposed_mods, funcname, inside_err = to_call
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subactor_exposed_mods = []
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func_defined = globals().get(funcname, False)
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subactor_requests_to = 'root'
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remote_err = tractor.RemoteActorError
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# remote module that fails at import time
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if exposed_mods == ['tmp_mod']:
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# create an importable module with a bad import
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testdir.syspathinsert()
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# module should raise a ModuleNotFoundError at import
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testdir.makefile('.py', tmp_mod=funcname)
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# no need to expose module to the subactor
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subactor_exposed_mods = exposed_mods
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exposed_mods = []
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func_defined = False
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# subactor should not try to invoke anything
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subactor_requests_to = None
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# the module will be attempted to be imported locally but will
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# fail in the initial local instance of the actor
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remote_err = inside_err
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async def main():
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# spawn a subactor which calls us back
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async with tractor.open_nursery(
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arbiter_addr=arb_addr,
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enable_modules=exposed_mods.copy(),
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) as n:
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actor = tractor.current_actor()
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assert actor.is_arbiter
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await n.run_in_actor(
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sleep_back_actor,
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actor_name=subactor_requests_to,
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name='subactor',
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# function from the local exposed module space
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# the subactor will invoke when it RPCs back to this actor
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func_name=funcname,
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exposed_mods=exposed_mods,
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func_defined=True if func_defined else False,
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enable_modules=subactor_exposed_mods,
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)
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def run():
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trio.run(main)
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# handle both parameterized cases
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if exposed_mods and func_defined:
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run()
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else:
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# underlying errors aren't propagated upwards (yet)
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with pytest.raises(remote_err) as err:
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run()
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# get raw instance from pytest wrapper
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value = err.value
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# might get multiple `trio.Cancelled`s as well inside an inception
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if isinstance(value, trio.MultiError):
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value = next(itertools.dropwhile(
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lambda exc: not isinstance(exc, tractor.RemoteActorError),
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value.exceptions
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))
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if getattr(value, 'type', None):
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assert value.type is inside_err
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