Function runDC003

tests/cpp/integration/engine_destroy_chain_test.cpp:130–178

DC003 body: multiple SurfaceManagers.

// DC003 body: multiple SurfaceManagers.
static void runDC003() {
    auto* engine = ::agenui::getAGenUIEngine();
    if (!engine) _exit(1);

    ::agenui::testing::MockMessageListener l1;
    ::agenui::testing::MockMessageListener l2;
    ::agenui::testing::MockMessageListener l3;

    auto* sm1 = engine->createSurfaceManager();
    auto* sm2 = engine->createSurfaceManager();
    auto* sm3 = engine->createSurfaceManager();
    if (!sm1 || !sm2 || !sm3) _exit(2);
    ::agenui::testing::WaitForWorkerIdle();

    sm1->addSurfaceEventListener(&l1);
    sm2->addSurfaceEventListener(&l2);
    sm3->addSurfaceEventListener(&l3);

    // sm1: complete session
    sm1->beginTextStream();
    sm1->receiveTextChunk(createSurfaceJson("dc003-s1"));
    sm1->endTextStream();
    ::agenui::testing::WaitForWorkerIdle();

    // sm2: mid-stream (no endTextStream)
    sm2->beginTextStream();
    sm2->receiveTextChunk(createSurfaceJson("dc003-s2"));

    // sm3: complete first session, start second mid-stream
    sm3->beginTextStream();
    sm3->receiveTextChunk(createSurfaceJson("dc003-s3"));
    sm3->endTextStream();
    ::agenui::testing::WaitForWorkerIdle();

    sm3->beginTextStream();
    sm3->receiveTextChunk(updateComponentsJson("dc003-s3"));
    // second session left open

    // Destroy all SMs — listeners still attached on sm2/sm3
    sm1->removeSurfaceEventListener(&l1);
    engine->destroySurfaceManager(sm1);
    engine->destroySurfaceManager(sm2);
    engine->destroySurfaceManager(sm3);

    // No drain — engine->stop() drains the worker thread itself.
    ::agenui::destroyAGenUIEngine();

    _exit(0);
}

// DC004 body: rapid create/destroy cycles.
static void runDC004() {