Add a test for the FSM
Accepted By: @wraitii Differential Revision: https://code.wildfiregames.com/D4902 This was SVN commit r27742.
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source/network/tests/test_FSM.h
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source/network/tests/test_FSM.h
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/* Copyright (C) 2023 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "lib/self_test.h"
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#include "network/FSM.h"
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#include <array>
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class TestFSM : public CxxTest::TestSuite
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{
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struct FSMGlobalState
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{
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std::array<size_t, 3> occurCount{0, 0, 0};
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};
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template<size_t N>
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static bool editGlobal(void* state, const CFsmEvent*)
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{
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++std::get<N>(reinterpret_cast<FSMGlobalState*>(state)->occurCount);
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return true;
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}
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static bool editParam(void*, CFsmEvent* event)
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{
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++*reinterpret_cast<size_t*>(event->GetParamRef());
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return true;
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}
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enum class State : unsigned int
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{
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zero,
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one,
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two
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};
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enum class Instruction : unsigned int
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{
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toZero,
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toOne,
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toTwo
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};
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public:
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void test_global()
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{
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FSMGlobalState globalState;
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CFsm FSMObject;
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/*
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Corresponding pseudocode
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while (true)
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{
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// state zero
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await nextInstruction();
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// state one
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const auto cond = await nextInstruction();
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if (cond == instruction::toOne)
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{
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//state two
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await nextInstruction();
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}
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}
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*/
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FSMObject.AddTransition(static_cast<unsigned int>(State::zero),
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static_cast<unsigned int>(Instruction::toOne), static_cast<unsigned int>(State::one),
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reinterpret_cast<void*>(&editGlobal<1>), static_cast<void*>(&globalState));
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FSMObject.AddTransition(static_cast<unsigned int>(State::one),
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static_cast<unsigned int>(Instruction::toTwo), static_cast<unsigned int>(State::two),
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reinterpret_cast<void*>(&editGlobal<2>), static_cast<void*>(&globalState));
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FSMObject.AddTransition(static_cast<unsigned int>(State::one),
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static_cast<unsigned int>(Instruction::toZero), static_cast<unsigned int>(State::zero),
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reinterpret_cast<void*>(&editGlobal<0>), static_cast<void*>(&globalState));
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FSMObject.AddTransition(static_cast<unsigned int>(State::two),
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static_cast<unsigned int>(Instruction::toZero), static_cast<unsigned int>(State::zero),
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reinterpret_cast<void*>(&editGlobal<0>), static_cast<void*>(&globalState));
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FSMObject.SetFirstState(static_cast<unsigned int>(State::zero));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toOne), nullptr));
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TS_ASSERT_EQUALS(std::get<1>(globalState.occurCount), 1);
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TS_ASSERT_EQUALS(FSMObject.GetCurrState(), static_cast<unsigned int>(State::one));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toTwo), nullptr));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toZero), nullptr));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toOne), nullptr));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toZero), nullptr));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toOne), nullptr));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toZero), nullptr));
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TS_ASSERT_EQUALS(std::get<0>(globalState.occurCount), 3);
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TS_ASSERT_EQUALS(std::get<1>(globalState.occurCount), 3);
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TS_ASSERT_EQUALS(std::get<2>(globalState.occurCount), 1);
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// Some transitions do not exist.
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TS_ASSERT(!FSMObject.Update(static_cast<unsigned int>(Instruction::toZero), nullptr));
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TS_ASSERT(!FSMObject.Update(static_cast<unsigned int>(Instruction::toTwo), nullptr));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toOne), nullptr));
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TS_ASSERT(!FSMObject.Update(static_cast<unsigned int>(Instruction::toOne), nullptr));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toTwo), nullptr));
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TS_ASSERT(!FSMObject.Update(static_cast<unsigned int>(Instruction::toTwo), nullptr));
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TS_ASSERT_EQUALS(std::get<0>(globalState.occurCount), 3);
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TS_ASSERT_EQUALS(std::get<1>(globalState.occurCount), 4);
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TS_ASSERT_EQUALS(std::get<2>(globalState.occurCount), 2);
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}
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void test_param()
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{
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FSMGlobalState globalState;
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CFsm FSMObject;
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// Equal to the FSM in test_global.
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FSMObject.AddTransition(static_cast<unsigned int>(State::zero),
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static_cast<unsigned int>(Instruction::toOne), static_cast<unsigned int>(State::one),
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reinterpret_cast<void*>(&editParam), nullptr);
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FSMObject.AddTransition(static_cast<unsigned int>(State::one),
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static_cast<unsigned int>(Instruction::toTwo), static_cast<unsigned int>(State::two),
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reinterpret_cast<void*>(&editParam), nullptr);
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FSMObject.AddTransition(static_cast<unsigned int>(State::one),
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static_cast<unsigned int>(Instruction::toZero), static_cast<unsigned int>(State::zero),
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reinterpret_cast<void*>(&editParam), nullptr);
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FSMObject.AddTransition(static_cast<unsigned int>(State::two),
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static_cast<unsigned int>(Instruction::toZero), static_cast<unsigned int>(State::zero),
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reinterpret_cast<void*>(&editParam), nullptr);
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FSMObject.SetFirstState(static_cast<unsigned int>(State::zero));
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// Some transitions do not exist.
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TS_ASSERT(!FSMObject.Update(static_cast<unsigned int>(Instruction::toZero),
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static_cast<void*>(&std::get<0>(globalState.occurCount))));
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TS_ASSERT(!FSMObject.Update(static_cast<unsigned int>(Instruction::toTwo),
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static_cast<void*>(&std::get<2>(globalState.occurCount))));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toOne),
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static_cast<void*>(&std::get<1>(globalState.occurCount))));
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TS_ASSERT(!FSMObject.Update(static_cast<unsigned int>(Instruction::toOne),
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static_cast<void*>(&std::get<1>(globalState.occurCount))));
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TS_ASSERT(FSMObject.Update(static_cast<unsigned int>(Instruction::toTwo),
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static_cast<void*>(&std::get<2>(globalState.occurCount))));
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TS_ASSERT(!FSMObject.Update(static_cast<unsigned int>(Instruction::toTwo),
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static_cast<void*>(&std::get<2>(globalState.occurCount))));
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TS_ASSERT_EQUALS(std::get<0>(globalState.occurCount), 0);
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TS_ASSERT_EQUALS(std::get<1>(globalState.occurCount), 1);
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TS_ASSERT_EQUALS(std::get<2>(globalState.occurCount), 1);
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}
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};
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