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#include <library/cpp/testing/unittest/registar.h>
 
#include "actor.h" 
#include "queue_in_actor.h" 
 
#include <library/cpp/messagebus/misc/test_sync.h>

#include <util/generic/object_counter.h>
#include <util/system/event.h>

using namespace NActor; 
 
template <typename TThis> 
struct TTestActorBase: public TAtomicRefCount<TThis>, public TActor<TThis> {
    TTestSync Started; 
    TTestSync Acted; 
 
    TTestActorBase(TExecutor* executor) 
        : TActor<TThis>(executor) 
    {
    }
 
    void Act(TDefaultTag) { 
        Started.Inc(); 
        static_cast<TThis*>(this)->Act2(); 
        Acted.Inc(); 
    } 
}; 
 
struct TNopActor: public TTestActorBase<TNopActor> {
    TObjectCounter<TNopActor> AllocCounter; 
 
    TNopActor(TExecutor* executor) 
        : TTestActorBase<TNopActor>(executor) 
    {
    }
 
    void Act2() { 
    } 
}; 
 
struct TWaitForSignalActor: public TTestActorBase<TWaitForSignalActor> {
    TWaitForSignalActor(TExecutor* executor) 
        : TTestActorBase<TWaitForSignalActor>(executor) 
    {
    }
 
    TSystemEvent WaitFor;
 
    void Act2() { 
        WaitFor.Wait(); 
    } 
}; 
 
struct TDecrementAndSendActor: public TTestActorBase<TDecrementAndSendActor>, public TQueueInActor<TDecrementAndSendActor, int> {
    TSystemEvent Done;
 
    TDecrementAndSendActor* Next; 
 
    TDecrementAndSendActor(TExecutor* executor) 
        : TTestActorBase<TDecrementAndSendActor>(executor) 
        , Next(nullptr)
    {
    }
 
    void ProcessItem(TDefaultTag, TDefaultTag, int n) { 
        if (n == 0) { 
            Done.Signal(); 
        } else { 
            Next->EnqueueAndSchedule(n - 1); 
        } 
    } 
 
    void Act(TDefaultTag) { 
        DequeueAll(); 
    } 
}; 
 
struct TObjectCountChecker { 
    TObjectCountChecker() { 
        CheckCounts(); 
    } 
 
    ~TObjectCountChecker() { 
        CheckCounts(); 
    } 
 
    void CheckCounts() { 
        UNIT_ASSERT_VALUES_EQUAL(TAtomicBase(0), TObjectCounter<TNopActor>::ObjectCount()); 
        UNIT_ASSERT_VALUES_EQUAL(TAtomicBase(0), TObjectCounter<TWaitForSignalActor>::ObjectCount()); 
        UNIT_ASSERT_VALUES_EQUAL(TAtomicBase(0), TObjectCounter<TDecrementAndSendActor>::ObjectCount()); 
    } 
}; 
 
Y_UNIT_TEST_SUITE(TActor) {
    Y_UNIT_TEST(Simple) {
        TObjectCountChecker objectCountChecker; 
 
        TExecutor executor(4); 
 
        TIntrusivePtr<TNopActor> actor(new TNopActor(&executor)); 
 
        actor->Schedule(); 
 
        actor->Acted.WaitFor(1u); 
    } 
 
    Y_UNIT_TEST(ScheduleAfterStart) {
        TObjectCountChecker objectCountChecker; 
 
        TExecutor executor(4); 
 
        TIntrusivePtr<TWaitForSignalActor> actor(new TWaitForSignalActor(&executor)); 
 
        actor->Schedule(); 
 
        actor->Started.WaitFor(1); 
 
        actor->Schedule(); 
 
        actor->WaitFor.Signal(); 
 
        // make sure Act is called second time 
        actor->Acted.WaitFor(2u); 
    } 
 
    void ComplexImpl(int queueSize, int actorCount) { 
        TObjectCountChecker objectCountChecker; 
 
        TExecutor executor(queueSize); 
 
        TVector<TIntrusivePtr<TDecrementAndSendActor>> actors;
        for (int i = 0; i < actorCount; ++i) { 
            actors.push_back(new TDecrementAndSendActor(&executor)); 
        } 
 
        for (int i = 0; i < actorCount; ++i) { 
            actors.at(i)->Next = &*actors.at((i + 1) % actorCount); 
        } 
 
        for (int i = 0; i < actorCount; ++i) { 
            actors.at(i)->EnqueueAndSchedule(10000); 
        } 
 
        for (int i = 0; i < actorCount; ++i) { 
            actors.at(i)->Done.WaitI(); 
        } 
    } 
 
    Y_UNIT_TEST(ComplexContention) {
        ComplexImpl(4, 6); 
    } 
 
    Y_UNIT_TEST(ComplexNoContention) {
        ComplexImpl(6, 4); 
    } 
}