public void TestEnterExitTransitionEvents()
{
int aEnterCount = 0;
int aExitCount = 0;
State?aExitToState = null;
int bEnterCount = 0;
State?bEnterFromState = null;
FiniteStateMachine <State> fsm = new FiniteStateMachine <State>();
fsm.AddTransition(State.A, State.B);
fsm.AddTransition(State.B, State.C);
fsm.AddEventOnEnter(State.A, (from, to) => {
Assert.IsTrue(to == State.A);
aEnterCount++;
});
fsm.AddEventOnExit(State.A, (from, to) => {
Assert.IsTrue(from == State.A);
aExitToState = to;
aExitCount++;
});
fsm.AddEventOnEnter(State.B, (from, to) => {
bEnterFromState = from;
Assert.IsTrue(to == State.B);
bEnterCount++;
});
// Start does not trigger enter event
fsm.Start(State.A);
Assert.IsTrue(aEnterCount == 0);
Assert.IsTrue(aExitCount == 0);
Assert.IsTrue(bEnterCount == 0);
fsm.TransitionTo(State.B);
Assert.IsTrue(aEnterCount == 0);
Assert.IsTrue(aExitCount == 1);
Assert.IsTrue(aExitToState == State.B);
Assert.IsTrue(bEnterCount == 1);
Assert.IsTrue(bEnterFromState == State.A);
}
