public void InitializeALoadedStateMachine(
AsyncPassiveStateMachine <int, int> machine,
Exception receivedException)
{
"establish a loaded initialized state machine".x(async() =>
{
machine = new AsyncPassiveStateMachine <int, int>();
var loader = new Persisting.StateMachineLoader <int>();
loader.SetCurrentState(new Initializable <int> {
Value = 1
});
loader.SetHistoryStates(new Dictionary <int, int>());
await machine.Load(loader);
});
"when initializing the state machine".x(async() =>
receivedException = await Catch.Exception(async() =>
await machine.Initialize(0)));
"should throw an invalid operation exception".x(() =>
{
receivedException
.Should().BeAssignableTo <InvalidOperationException>();
receivedException.Message
.Should().Be(ExceptionMessages.StateMachineIsAlreadyInitialized);
});
}
public void LoadingNonInitializedStateMachine(
AsyncPassiveStateMachine <State, Event> loadedMachine)
{
"when a non-initialized state machine is loaded".x(async() =>
{
var loader = new StateMachineLoader <State>();
loader.SetCurrentState(new Initializable <State>());
loader.SetHistoryStates(new Dictionary <State, State>());
var stateMachineDefinitionBuilder = new StateMachineDefinitionBuilder <State, Event>();
SetupStates(stateMachineDefinitionBuilder);
loadedMachine = stateMachineDefinitionBuilder
.WithInitialState(State.A)
.Build()
.CreatePassiveStateMachine();
await loadedMachine.Load(loader);
});
"it should not be initialized already".x(async() =>
{
var stateMachineSaver = new StateMachineSaver <State>();
await loadedMachine.Save(stateMachineSaver);
stateMachineSaver
.CurrentStateId
.IsInitialized
.Should()
.BeFalse();
});
}
public void Loading(
StateMachineSaver <State> saver,
StateMachineLoader <State> loader,
FakeExtension extension,
State sourceState,
State targetState)
{
"establish a saved state machine with history"._(async() =>
{
var machine = new AsyncPassiveStateMachine <State, Event>();
DefineMachine(machine);
await machine.Initialize(State.A);
await machine.Start();
await machine.Fire(Event.S2); // set history of super state S
await machine.Fire(Event.B); // set current state to B
saver = new StateMachineSaver <State>();
loader = new StateMachineLoader <State>();
await machine.Save(saver);
});
"when state machine is loaded"._(async() =>
{
loader.SetCurrentState(saver.CurrentStateId);
loader.SetHistoryStates(saver.HistoryStates);
extension = new FakeExtension();
var loadedMachine = new AsyncPassiveStateMachine <State, Event>();
loadedMachine.AddExtension(extension);
DefineMachine(loadedMachine);
await loadedMachine.Load(loader);
loadedMachine.TransitionCompleted += (sender, args) =>
{
sourceState = args.StateId;
targetState = args.NewStateId;
};
await loadedMachine.Start();
await loadedMachine.Fire(Event.S);
});
"it should reset current state"._(() =>
sourceState.Should().Be(State.B));
"it should reset all history states of super states"._(() =>
targetState.Should().Be(State.S2));
"it should notify extensions"._(()
=> extension.LoadedCurrentState
.Should().BeEquivalentTo(State.B));
}
public void LoadingNonInitializedStateMachine(
AsyncPassiveStateMachine <State, Event> loadedMachine)
{
"when a non-initialized state machine is loaded"._(
async() =>
{
var loader = new StateMachineLoader <State>();
loader.SetCurrentState(new Initializable <State>());
loader.SetHistoryStates(new Dictionary <State, State>());
loadedMachine = new AsyncPassiveStateMachine <State, Event>();
DefineMachine(loadedMachine);
await loadedMachine.Load(loader);
});
"it should not be initialized already"._(
() =>
{
Action act = () => loadedMachine.Initialize(State.S);
act.ShouldNotThrow();
});
}
public void LoadingEventsForPassiveStateMachine(
AsyncPassiveStateMachine <string, int> machine)
{
"establish a passive state machine".x(() =>
{
var stateMachineDefinitionBuilder = new StateMachineDefinitionBuilder <string, int>();
stateMachineDefinitionBuilder
.In("A")
.On(1)
.Goto("B");
stateMachineDefinitionBuilder
.In("B")
.On(2)
.Goto("C");
stateMachineDefinitionBuilder
.In("C")
.On(3)
.Goto("A");
machine = stateMachineDefinitionBuilder
.WithInitialState("A")
.Build()
.CreatePassiveStateMachine();
});
"when it is loaded with Events".x(async() =>
{
var firstEvent = new EventInformation <int>(2, null);
var secondEvent = new EventInformation <int>(3, null);
var priorityEvent = new EventInformation <int>(1, null);
var loader = new StateMachineLoader <string, int>();
loader.SetEvents(new List <EventInformation <int> >
{
firstEvent,
secondEvent,
});
loader.SetPriorityEvents(new List <EventInformation <int> >
{
priorityEvent
});
var extension = A.Fake <IExtension <string, int> >();
machine.AddExtension(extension);
await machine.Load(loader);
A.CallTo(() => extension.Loaded(
A <IStateMachineInformation <string, int> > .Ignored,
A <Initializable <string> > .Ignored,
A <IReadOnlyDictionary <string, string> > .Ignored,
A <IReadOnlyCollection <EventInformation <int> > >
.That
.Matches(c =>
c.Count == 2 &&
c.Contains(firstEvent) &&
c.Contains(secondEvent)),
A <IReadOnlyCollection <EventInformation <int> > >
.That
.Matches(c =>
c.Count == 1 &&
c.Contains(priorityEvent))))
.MustHaveHappenedOnceExactly();
});
"it should process those events".x(async() =>
{
var transitionRecords = new List <TransitionRecord>();
machine.TransitionCompleted += (sender, args) =>
transitionRecords.Add(
new TransitionRecord(args.EventId, args.StateId, args.NewStateId));
await machine.Start();
transitionRecords
.Should()
.HaveCount(3)
.And
.IsEquivalentInOrder(new List <TransitionRecord>
{
new TransitionRecord(1, "A", "B"),
new TransitionRecord(2, "B", "C"),
new TransitionRecord(3, "C", "A")
});
});
}