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# Copyright 2021 The Duet Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from concurrent.futures import Future
from typing import Any, Callable, Optional
import pytest
import duet
try:
import grpc
except ImportError:
grpc = None
def test_awaitable_future():
assert isinstance(duet.awaitable(Future()), duet.AwaitableFuture)
def test_awaitable_future_propagates_cancellation():
f = Future()
awaitable = duet.AwaitableFuture.wrap(f)
awaitable.cancel()
assert f.cancelled()
@pytest.mark.skipif(grpc is None, reason="only run if grpc is installed")
def test_awaitable_grpc_future():
class ConcreteGrpcFuture(grpc.Future):
def cancel(self) -> bool:
return True
def cancelled(self) -> bool:
return True
def running(self) -> bool:
return True
def done(self) -> bool:
return True
def result(self, timeout: Optional[int] = None) -> Any:
return 1234
def exception(self, timeout=None) -> Optional[BaseException]:
return None
def add_done_callback(self, fn: Callable[[Any], Any]) -> None:
pass
def traceback(self, timeout=None):
pass
assert isinstance(duet.awaitable(ConcreteGrpcFuture()), duet.AwaitableFuture)
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