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State machine as a stack (#123)

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* State machine as a stack

* Fix comments linked to code review

* I will think to compile, next time
This commit is contained in:
Gawaboumga
2017-04-20 12:30:43 +02:00
committed by Jérôme Leclercq
parent 0a75bce99d
commit eb70453574
3 changed files with 186 additions and 29 deletions
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64
tests/SDK/NDK/StateMachine.cpp
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@@ -28,21 +28,79 @@ class TestState : public Ndk::State
bool m_isUpdated;
};
class SecondTestState : public Ndk::State
{
public:
void Enter(Ndk::StateMachine& /*fsm*/) override
{
m_isUpdated = false;
}
bool IsUpdated() const
{
return m_isUpdated;
}
void Leave(Ndk::StateMachine& /*fsm*/) override
{
}
bool Update(Ndk::StateMachine& fsm, float /*elapsedTime*/) override
{
if (fsm.IsTopState(this))
m_isUpdated = true;
return true;
}
private:
bool m_isUpdated;
};
SCENARIO("State & StateMachine", "[NDK][STATE]")
{
GIVEN("A statemachine with our TestState")
GIVEN("A statemachine with our test states")
{
std::shared_ptr<TestState> testState = std::make_shared<TestState>();
Ndk::StateMachine stateMachine(testState);
std::shared_ptr<SecondTestState> secondTestState = std::make_shared<SecondTestState>();
Ndk::StateMachine stateMachine(secondTestState);
stateMachine.PushState(testState);
REQUIRE(!testState->IsUpdated());
REQUIRE(!secondTestState->IsUpdated());
WHEN("We update our machine")
{
stateMachine.Update(1.f);
THEN("Our state has been updated")
THEN("Our state on the top has been updated but not the bottom one")
{
REQUIRE(stateMachine.IsTopState(testState.get()));
REQUIRE(!stateMachine.IsTopState(secondTestState.get()));
REQUIRE(testState->IsUpdated());
REQUIRE(!secondTestState->IsUpdated());
}
}
WHEN("We exchange the states' positions while emptying the stack")
{
REQUIRE(stateMachine.PopStatesUntil(secondTestState));
REQUIRE(stateMachine.IsTopState(secondTestState.get()));
std::shared_ptr<Ndk::State> oldState = stateMachine.PopState();
REQUIRE(stateMachine.PopState() == nullptr);
stateMachine.SetState(testState);
stateMachine.PushState(oldState);
stateMachine.Update(1.f);
THEN("Both states should be updated")
{
REQUIRE(!stateMachine.IsTopState(testState.get()));
REQUIRE(stateMachine.IsTopState(secondTestState.get()));
REQUIRE(testState->IsUpdated());
REQUIRE(secondTestState->IsUpdated());
}
}
}