public void TestMultiStateEnterExitTransitionEvents()
{
int abEnterCount = 0;
int abExitCount = 0;
int bcEnterCount = 0;
int bcExitCount = 0;
FiniteStateMachine <State> fsm = new FiniteStateMachine <State>();
fsm.AddTransition(State.A, State.B, State.C);
fsm.AddTransition(State.B, State.A, State.C);
fsm.AddTransition(State.C, State.A, State.B);
fsm.AddEventOnGroupEnter(new[] { State.A, State.B }, (from, to) => {
Assert.IsTrue(from != State.A && from != State.B);
Assert.IsTrue(to == State.A || to == State.B);
abEnterCount++;
});
fsm.AddEventOnGroupExit(new[] { State.A, State.B }, (from, to) => {
Assert.IsTrue(from == State.A || from == State.B);
Assert.IsTrue(to != State.A && to != State.B);
abExitCount++;
});
fsm.AddEventOnGroupEnter(new[] { State.B, State.C }, (from, to) => {
Assert.IsTrue(from != State.B && from != State.C);
Assert.IsTrue(to == State.B || to == State.C);
bcEnterCount++;
});
fsm.AddEventOnGroupExit(new[] { State.B, State.C }, (from, to) => {
Assert.IsTrue(from == State.B || from == State.C);
Assert.IsTrue(to != State.B && to != State.C);
bcExitCount++;
});
fsm.Start(State.A);
Assert.AreEqual(0, abEnterCount);
Assert.AreEqual(0, abExitCount);
Assert.AreEqual(0, bcEnterCount);
Assert.AreEqual(0, bcExitCount);
fsm.TransitionTo(State.B);
Assert.AreEqual(0, abEnterCount);
Assert.AreEqual(0, abExitCount);
Assert.AreEqual(1, bcEnterCount);
Assert.AreEqual(0, bcExitCount);
fsm.TransitionTo(State.C);
Assert.AreEqual(0, abEnterCount);
Assert.AreEqual(1, abExitCount);
Assert.AreEqual(1, bcEnterCount);
Assert.AreEqual(0, bcExitCount);
fsm.TransitionTo(State.A);
Assert.AreEqual(1, abEnterCount);
Assert.AreEqual(1, abExitCount);
Assert.AreEqual(1, bcEnterCount);
Assert.AreEqual(1, bcExitCount);
}