library/cpp/messagebus/cc_semaphore_ut.cpp


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#include <library/cpp/testing/unittest/registar.h>

#include "cc_semaphore.h"

#include <util/system/atomic.h>

namespace {
    struct TTestSemaphore: public TComplexConditionSemaphore<TTestSemaphore> { 
        TAtomic Current;

        TTestSemaphore() 
            : Current(0) 
        { 
        } 

        bool TryWait() {
            return AtomicGet(Current) > 0;
        }

        void Aquire() {
            Wait();
            AtomicDecrement(Current);
        }

        void Release() {
            AtomicIncrement(Current);
            Updated();
        }
    };
}

Y_UNIT_TEST_SUITE(TComplexConditionSemaphore) {
    Y_UNIT_TEST(Simple) {
        TTestSemaphore sema;
        UNIT_ASSERT(!sema.TryWait());
        sema.Release();
        UNIT_ASSERT(sema.TryWait());
        sema.Release();
        UNIT_ASSERT(sema.TryWait());
        sema.Aquire();
        UNIT_ASSERT(sema.TryWait());
        sema.Aquire();
        UNIT_ASSERT(!sema.TryWait());
    }
}