Method TestSharedPtrDowncast

util/generic/ptr_ut.cpp:862–940

};

void TPointerTest::TestSharedPtrDowncast() {
    {
        NTesting::TProbeState probeState = {};

        {
            TSimpleSharedPtr<TVirtualProbe> base = MakeSimpleShared<TDerivedProbe>(&probeState);
            UNIT_ASSERT_VALUES_EQUAL(probeState.Constructors, 1);

            {
                auto derived = base.As<TDerivedProbe>();
                UNIT_ASSERT_VALUES_EQUAL(probeState.Constructors, 1);

                UNIT_ASSERT_VALUES_EQUAL(base.Get(), derived.Get());
                UNIT_ASSERT_VALUES_EQUAL(base.ReferenceCounter(), derived.ReferenceCounter());

                UNIT_ASSERT_VALUES_EQUAL(base.RefCount(), 2l);
                UNIT_ASSERT_VALUES_EQUAL(derived.RefCount(), 2l);
            }

            UNIT_ASSERT_VALUES_EQUAL(probeState.Destructors, 0);
        }

        UNIT_ASSERT_VALUES_EQUAL(probeState.Destructors, 1);
    }
    {
        NTesting::TProbeState probeState = {};

        {
            TSimpleSharedPtr<TVirtualProbe> base = MakeSimpleShared<TDerivedProbe>(&probeState);
            UNIT_ASSERT_VALUES_EQUAL(probeState.Constructors, 1);

            auto derived = std::move(base).As<TDerivedProbe>();
            UNIT_ASSERT_VALUES_EQUAL(probeState.Constructors, 1);
            UNIT_ASSERT_VALUES_EQUAL(probeState.CopyConstructors, 0);
            UNIT_ASSERT_VALUES_EQUAL(probeState.Destructors, 0);
        }

        UNIT_ASSERT_VALUES_EQUAL(probeState.Destructors, 1);
    }
    {
        NTesting::TProbeState probeState = {};

        {
            TSimpleSharedPtr<TVirtualProbe> base = MakeSimpleShared<TDerivedProbe>(&probeState);
            UNIT_ASSERT_VALUES_EQUAL(probeState.Constructors, 1);

            {
                auto derivedSibling = base.As<TDerivedProbeSibling>();
                UNIT_ASSERT_VALUES_EQUAL(probeState.Constructors, 1);

                UNIT_ASSERT_VALUES_EQUAL(derivedSibling.Get(), nullptr);
                UNIT_ASSERT_VALUES_UNEQUAL(base.ReferenceCounter(), derivedSibling.ReferenceCounter());

                UNIT_ASSERT_VALUES_EQUAL(base.RefCount(), 1l);
                UNIT_ASSERT_VALUES_EQUAL(derivedSibling.RefCount(), 0l);
            }

            UNIT_ASSERT_VALUES_EQUAL(probeState.Destructors, 0);