mirror of https://github.com/grpc/grpc.git
[promises] Re-enable C++ end2end tests (with fixes) (#32837)
Makes some awkward fixes to compression filter, call, connected channel to hold the semantics we have upheld now in tests. Once the fixes described here https://github.com/grpc/grpc/blob/master/src/core/lib/channel/connected_channel.cc#L636 are in this gets a lot less ad-hoc, but that's likely going to be post-landing promises client & server side. We specifically need special handling for server side cancellation in response to reads wrt the inproc transport - which doesn't track cancellation thoroughly enough itself. <!-- If you know who should review your pull request, please assign it to that person, otherwise the pull request would get assigned randomly. If your pull request is for a specific language, please add the appropriate lang label. --> --------- Co-authored-by: ctiller <ctiller@users.noreply.github.com>pull/33008/head
Craig Tiller
2 years ago
committed by
GitHub
parent
65a2a895af
commit
ad41fe96b6
18 changed files with 300 additions and 13 deletions
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// Copyright 2023 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef GRPC_SRC_CORE_LIB_PROMISE_PRIORITIZED_RACE_H |
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#define GRPC_SRC_CORE_LIB_PROMISE_PRIORITIZED_RACE_H |
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#include <grpc/support/port_platform.h> |
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#include <type_traits> |
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#include <utility> |
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namespace grpc_core { |
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namespace promise_detail { |
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template <typename A, typename B> |
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class TwoPartyPrioritizedRace { |
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public: |
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using Result = decltype(std::declval<A>()()); |
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explicit TwoPartyPrioritizedRace(A a, B b) |
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: a_(std::move(a)), b_(std::move(b)) {} |
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Result operator()() { |
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// Check the priority promise.
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auto p = a_(); |
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if (p.ready()) return p; |
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// Check the other promise.
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p = b_(); |
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if (p.ready()) { |
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// re-poll a to see if it's also completed.
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auto q = a_(); |
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if (q.ready()) { |
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// both are ready, but a is prioritized
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return q; |
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} |
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} |
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return p; |
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} |
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private: |
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A a_; |
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B b_; |
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}; |
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template <typename... Promises> |
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class PrioritizedRace; |
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template <typename Promise, typename... Promises> |
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class PrioritizedRace<Promise, Promises...> |
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: public TwoPartyPrioritizedRace<Promise, PrioritizedRace<Promises...>> { |
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public: |
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using Result = decltype(std::declval<Promise>()()); |
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explicit PrioritizedRace(Promise promise, Promises... promises) |
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: TwoPartyPrioritizedRace<Promise, PrioritizedRace<Promises...>>( |
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std::move(promise), |
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PrioritizedRace<Promises...>(std::move(promises)...)) {} |
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}; |
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template <typename Promise> |
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class PrioritizedRace<Promise> { |
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public: |
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using Result = decltype(std::declval<Promise>()()); |
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explicit PrioritizedRace(Promise promise) : promise_(std::move(promise)) {} |
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Result operator()() { return promise_(); } |
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private: |
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Promise promise_; |
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}; |
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} // namespace promise_detail
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/// Run all the promises until one is non-pending.
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/// Once there's a non-pending promise, repoll all the promises before that.
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/// Return the result from the lexically first non-pending promise.
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template <typename... Promises> |
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promise_detail::PrioritizedRace<Promises...> PrioritizedRace( |
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Promises... promises) { |
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return promise_detail::PrioritizedRace<Promises...>(std::move(promises)...); |
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} |
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} // namespace grpc_core
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#endif // GRPC_SRC_CORE_LIB_PROMISE_PRIORITIZED_RACE_H
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// Copyright 2023 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "src/core/lib/promise/prioritized_race.h" |
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#include "gtest/gtest.h" |
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#include "src/core/lib/promise/poll.h" |
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namespace grpc_core { |
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Poll<int> instant() { return 1; } |
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Poll<int> never() { return Pending(); } |
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TEST(PrioritizedRaceTest, Race1) { |
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EXPECT_EQ(PrioritizedRace(instant)(), Poll<int>(1)); |
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} |
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TEST(PrioritizedRaceTest, Race2A) { |
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EXPECT_EQ(PrioritizedRace(instant, never)(), Poll<int>(1)); |
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} |
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TEST(PrioritizedRaceTest, Race2B) { |
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EXPECT_EQ(PrioritizedRace(never, instant)(), Poll<int>(1)); |
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} |
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TEST(PrioritizedRaceTest, PrioritizedCompletion2A) { |
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int first_polls = 0; |
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int second_polls = 0; |
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auto r = PrioritizedRace( |
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[&first_polls]() -> Poll<int> { |
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++first_polls; |
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return 1; |
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}, |
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[&second_polls]() { |
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++second_polls; |
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return 2; |
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})(); |
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EXPECT_EQ(r, Poll<int>(1)); |
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// First promise completes immediately, so second promise is never polled.
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EXPECT_EQ(first_polls, 1); |
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EXPECT_EQ(second_polls, 0); |
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} |
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TEST(PrioritizedRaceTest, PrioritizedCompletion2B) { |
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int first_polls = 0; |
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int second_polls = 0; |
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auto r = PrioritizedRace( |
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[&first_polls]() -> Poll<int> { |
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++first_polls; |
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if (first_polls > 1) return 1; |
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return Pending{}; |
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}, |
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[&second_polls]() { |
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++second_polls; |
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return 2; |
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})(); |
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EXPECT_EQ(r, Poll<int>(1)); |
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// First promise completes after second promise is polled.
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EXPECT_EQ(first_polls, 2); |
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EXPECT_EQ(second_polls, 1); |
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} |
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} // namespace grpc_core
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int main(int argc, char** argv) { |
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::testing::InitGoogleTest(&argc, argv); |
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return RUN_ALL_TESTS(); |
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} |
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