public void Appropriate_action_is_called_on_transition()
{
var wasDoorOpened = false;
var wasDoorClosed = false;
var machine = new TinyStateMachine <DoorState, DoorEvents>(
DoorState.Closed
);
machine.Tr(DoorState.Closed, DoorEvents.Open, DoorState.Open)
.On(() => wasDoorOpened = true)
.Tr(DoorState.Open, DoorEvents.Close, DoorState.Closed)
.On(() => wasDoorClosed = true);
Assert.That(wasDoorOpened, Is.False);
Assert.That(wasDoorClosed, Is.False);
machine.Fire(DoorEvents.Open);
Assert.That(wasDoorOpened, Is.True);
Assert.That(wasDoorClosed, Is.False);
machine.Fire(DoorEvents.Close);
Assert.That(wasDoorOpened, Is.True);
Assert.That(wasDoorClosed, Is.True);
}
public void Guard_is_called_with_the_expected_parameters()
{
var machine = new TinyStateMachine <DoorState, DoorEvents>(
DoorState.Closed
);
machine.Tr(DoorState.Closed, DoorEvents.Open, DoorState.Open)
.Guard((from, trigger, to) =>
{
Assert.That(from, Is.EqualTo(DoorState.Closed));
Assert.That(trigger, Is.EqualTo(DoorEvents.Open));
Assert.That(to, Is.EqualTo(DoorState.Open));
return(true);
})
.Tr(DoorState.Open, DoorEvents.Close, DoorState.Closed)
.Guard((from, trigger, to) =>
{
Assert.That(from, Is.EqualTo(DoorState.Open));
Assert.That(trigger, Is.EqualTo(DoorEvents.Close));
Assert.That(to, Is.EqualTo(DoorState.Closed));
return(true);
});
Assert.That(machine.State, Is.EqualTo(DoorState.Closed));
machine.Fire(DoorEvents.Open);
Assert.That(machine.State, Is.EqualTo(DoorState.Open));
machine.Fire(DoorEvents.Close);
Assert.That(machine.State, Is.EqualTo(DoorState.Closed));
}
public void Guard_can_stop_transition()
{
var machine = new TinyStateMachine <DoorState, DoorEvents>(
DoorState.Closed
);
machine.Tr(DoorState.Closed, DoorEvents.Open, DoorState.Open)
.Guard(() => false)
.Tr(DoorState.Open, DoorEvents.Close, DoorState.Closed);
Assert.That(machine.State, Is.EqualTo(DoorState.Closed));
machine.Fire(DoorEvents.Open);
Assert.That(machine.State, Is.EqualTo(DoorState.Closed));
}