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// Copyright 2022 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/mpsc.h"
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#include <memory>
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#include <string>
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#include "absl/types/optional.h"
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include <grpc/support/log.h>
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#include "src/core/lib/promise/activity.h"
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#include "src/core/lib/promise/promise.h"
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using testing::Mock;
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using testing::StrictMock;
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namespace grpc_core {
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namespace {
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class MockActivity : public Activity, public Wakeable {
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public:
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MOCK_METHOD(void, WakeupRequested, ());
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void ForceImmediateRepoll(WakeupMask) override { WakeupRequested(); }
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void Orphan() override {}
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Waker MakeOwningWaker() override { return Waker(this, 0); }
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Waker MakeNonOwningWaker() override { return Waker(this, 0); }
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void Wakeup(WakeupMask) override { WakeupRequested(); }
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void WakeupAsync(WakeupMask) override { WakeupRequested(); }
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void Drop(WakeupMask) override {}
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std::string DebugTag() const override { return "MockActivity"; }
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std::string ActivityDebugTag(WakeupMask) const override { return DebugTag(); }
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void Activate() {
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if (scoped_activity_ != nullptr) return;
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scoped_activity_ = std::make_unique<ScopedActivity>(this);
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}
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void Deactivate() { scoped_activity_.reset(); }
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private:
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std::unique_ptr<ScopedActivity> scoped_activity_;
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};
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struct Payload {
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std::unique_ptr<int> x;
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bool operator==(const Payload& other) const {
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return (x == nullptr && other.x == nullptr) ||
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(x != nullptr && other.x != nullptr && *x == *other.x);
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}
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};
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Payload MakePayload(int value) { return {std::make_unique<int>(value)}; }
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TEST(MpscTest, NoOp) { MpscReceiver<Payload> receiver(1); }
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TEST(MpscTest, MakeSender) {
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MpscReceiver<Payload> receiver(1);
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MpscSender<Payload> sender = receiver.MakeSender();
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}
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TEST(MpscTest, SendOneThingInstantly) {
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MpscReceiver<Payload> receiver(1);
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MpscSender<Payload> sender = receiver.MakeSender();
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EXPECT_EQ(NowOrNever(sender.Send(MakePayload(1))), true);
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}
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TEST(MpscTest, SendOneThingInstantlyAndReceiveInstantly) {
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MpscReceiver<Payload> receiver(1);
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MpscSender<Payload> sender = receiver.MakeSender();
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EXPECT_EQ(NowOrNever(sender.Send(MakePayload(1))), true);
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EXPECT_EQ(NowOrNever(receiver.Next()), MakePayload(1));
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}
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TEST(MpscTest, SendingLotsOfThingsGivesPushback) {
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StrictMock<MockActivity> activity1;
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MpscReceiver<Payload> receiver(1);
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MpscSender<Payload> sender = receiver.MakeSender();
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activity1.Activate();
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EXPECT_EQ(NowOrNever(sender.Send(MakePayload(1))), true);
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EXPECT_EQ(NowOrNever(sender.Send(MakePayload(2))), absl::nullopt);
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activity1.Deactivate();
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}
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TEST(MpscTest, ReceivingAfterBlockageWakesUp) {
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StrictMock<MockActivity> activity1;
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StrictMock<MockActivity> activity2;
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MpscReceiver<Payload> receiver(1);
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MpscSender<Payload> sender = receiver.MakeSender();
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activity1.Activate();
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EXPECT_EQ(NowOrNever(sender.Send(MakePayload(1))), true);
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auto send2 = sender.Send(MakePayload(2));
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EXPECT_EQ(send2(), Poll<bool>(Pending{}));
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activity1.Deactivate();
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activity2.Activate();
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EXPECT_CALL(activity1, WakeupRequested());
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EXPECT_EQ(NowOrNever(receiver.Next()), MakePayload(1));
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Mock::VerifyAndClearExpectations(&activity1);
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auto receive2 = receiver.Next();
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EXPECT_EQ(receive2(), Poll<Payload>(Pending{}));
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activity2.Deactivate();
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activity1.Activate();
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EXPECT_CALL(activity2, WakeupRequested());
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EXPECT_EQ(send2(), Poll<bool>(true));
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Mock::VerifyAndClearExpectations(&activity2);
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activity1.Deactivate();
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activity2.Activate();
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EXPECT_EQ(receive2(), Poll<Payload>(MakePayload(2)));
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activity2.Deactivate();
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}
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TEST(MpscTest, BigBufferAllowsBurst) {
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MpscReceiver<Payload> receiver(50);
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MpscSender<Payload> sender = receiver.MakeSender();
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for (int i = 0; i < 25; i++) {
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EXPECT_EQ(NowOrNever(sender.Send(MakePayload(i))), true);
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}
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for (int i = 0; i < 25; i++) {
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EXPECT_EQ(NowOrNever(receiver.Next()), MakePayload(i));
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}
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}
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TEST(MpscTest, ClosureIsVisibleToSenders) {
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auto receiver = std::make_unique<MpscReceiver<Payload>>(1);
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MpscSender<Payload> sender = receiver->MakeSender();
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receiver.reset();
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EXPECT_EQ(NowOrNever(sender.Send(MakePayload(1))), false);
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}
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TEST(MpscTest, ImmediateSendWorks) {
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StrictMock<MockActivity> activity;
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MpscReceiver<Payload> receiver(1);
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MpscSender<Payload> sender = receiver.MakeSender();
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EXPECT_EQ(sender.UnbufferedImmediateSend(MakePayload(1)), true);
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EXPECT_EQ(sender.UnbufferedImmediateSend(MakePayload(2)), true);
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EXPECT_EQ(sender.UnbufferedImmediateSend(MakePayload(3)), true);
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EXPECT_EQ(sender.UnbufferedImmediateSend(MakePayload(4)), true);
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EXPECT_EQ(sender.UnbufferedImmediateSend(MakePayload(5)), true);
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EXPECT_EQ(sender.UnbufferedImmediateSend(MakePayload(6)), true);
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EXPECT_EQ(sender.UnbufferedImmediateSend(MakePayload(7)), true);
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activity.Activate();
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EXPECT_EQ(NowOrNever(receiver.Next()), MakePayload(1));
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EXPECT_EQ(NowOrNever(receiver.Next()), MakePayload(2));
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EXPECT_EQ(NowOrNever(receiver.Next()), MakePayload(3));
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EXPECT_EQ(NowOrNever(receiver.Next()), MakePayload(4));
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EXPECT_EQ(NowOrNever(receiver.Next()), MakePayload(5));
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EXPECT_EQ(NowOrNever(receiver.Next()), MakePayload(6));
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EXPECT_EQ(NowOrNever(receiver.Next()), MakePayload(7));
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auto receive2 = receiver.Next();
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EXPECT_EQ(receive2(), Poll<Payload>(Pending{}));
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activity.Deactivate();
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}
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} // namespace
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} // namespace grpc_core
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int main(int argc, char** argv) {
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gpr_log_verbosity_init();
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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