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69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project.
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* For complete copyright and license terms please see the LICENSE at the root of this distribution.
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#include <AzCore/Component/TickBus.h>
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#include <AzCore/Math/Random.h>
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#include <AzCore/std/sort.h>
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#include <AzCore/UnitTest/TestTypes.h>
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using namespace AZ;
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// TickBus handler with customizable tick-order.
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// When ticked it pushes its tick-order into a list.
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struct OrderedTicker : public TickBus::Handler
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{
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int m_order = TICK_DEFAULT; ///< Relative order on TickBus
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AZStd::vector<int>* m_targetList = nullptr; ///< OnTick, push order into this list
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///////////////////////////////////////////////////////////////////////////
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// TickBus
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int GetTickOrder() override { return m_order; }
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void OnTick(float /*deltaTime*/, ScriptTimePoint /*time*/) override
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{
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if (m_targetList)
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{
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m_targetList->push_back(m_order);
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}
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}
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///////////////////////////////////////////////////////////////////////////
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};
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class OrderedTickBus : public UnitTest::AllocatorsFixture
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{};
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TEST_F(OrderedTickBus, OnTick_HandlersFireInSortedOrder)
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{
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// arbitrary unsorted order for each handler
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AZStd::vector<int> unsortedHandlerOrder = { 7, 5, 6, 3, 2, 9, 1, 0, 4, 8 };
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// handlers will add their order to this list in OnTick()
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AZStd::vector<int> actualTickOrder;
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// create OrderedTickers
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AZStd::list<OrderedTicker> tickers;
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for (int order : unsortedHandlerOrder)
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{
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tickers.push_back();
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OrderedTicker& ticker = tickers.back();
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ticker.m_order = order;
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ticker.m_targetList = &actualTickOrder;
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ticker.TickBus::Handler::BusConnect();
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}
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// Tick!
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TickBus::Broadcast(&TickBus::Events::OnTick, 0.f, ScriptTimePoint{});
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// this is the order they should have fired in
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AZStd::vector<int> sortedOrder = unsortedHandlerOrder;
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AZStd::sort(sortedOrder.begin(), sortedOrder.end());
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// check the order they actually fired in
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EXPECT_EQ(actualTickOrder, sortedOrder);
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}
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