public void Test_request_transition_with_a_nested_fsm()
{
var nested = new StateMachine();
fsm.AddState("A", recorder.Track(nested));
fsm.AddState("B", recorder.TrackedState);
nested.AddState("A.X", recorder.TrackedState);
fsm.Init();
fsm.OnLogic();
recorder.Expect
.Enter("A")
.Enter("A.X")
.Logic("A")
.Logic("A.X")
.All();
fsm.RequestStateChange("B");
recorder.Expect
.Exit("A")
.Exit("A.X")
.Enter("B")
.All();
fsm.OnLogic();
recorder.Expect
.Logic("B")
.All();
}
public void TestStartupEvents()
{
fsm.AddState("A", recorder.Track(new State()));
recorder.Expect.Empty();
fsm.Init();
recorder.Expect.Enter("A").All();
Assert.AreEqual("A", fsm.ActiveStateName);
fsm.OnLogic();
recorder.Expect.Logic("A").All();
}
public void Test_example_scene()
{
// Advanced test that checks multiple different components working together.
// This is the hierarchical state machine example from the README
// that controls the beheviour of an Enemy Spy unit in a space game.
// ExtractIntel state
StateMachine extractIntel = new StateMachine();
extractIntel.AddState("CollectData", recorder.TrackedState);
extractIntel.AddState("SendData", recorder.TrackedState);
bool shouldCollectData = true;
extractIntel.SetStartState("CollectData");
extractIntel.AddTransition("CollectData", "SendData", t => !shouldCollectData);
extractIntel.AddTransition("SendData", "CollectData", t => shouldCollectData);
// States
fsm.AddState("FleeFromPlayer", recorder.TrackedState);
fsm.AddState("FollowPlayer", recorder.TrackedState);
fsm.AddState("ExtractIntel", recorder.Track(extractIntel));
// Transitions
bool isInPlayerScanningRange = false;
bool isPlayerInOwnScanningRange = false;
fsm.AddTransition(
"ExtractIntel",
"FollowPlayer",
t => !isPlayerInOwnScanningRange
);
fsm.AddTransition(
"FollowPlayer",
"ExtractIntel",
t => isPlayerInOwnScanningRange
);
fsm.AddTransition(
"ExtractIntel",
"FleeFromPlayer",
t => isInPlayerScanningRange
);
fsm.AddTransition(
"FleeFromPlayer",
"ExtractIntel",
t => !isInPlayerScanningRange
);
// Start
fsm.SetStartState("FollowPlayer");
fsm.Init();
recorder.Expect.Enter("FollowPlayer").All();
// Follow the player for one frame
fsm.OnLogic();
recorder.Expect.Logic("FollowPlayer").All();
// Player gets in scanning range => Start collecting data
isPlayerInOwnScanningRange = true;
fsm.OnLogic();
recorder.Expect
.Exit("FollowPlayer")
.Enter("ExtractIntel")
.Enter("CollectData")
.Logic("ExtractIntel")
.Logic("CollectData")
.All();
fsm.OnLogic();
recorder.Expect
.Logic("ExtractIntel")
.Logic("CollectData")
.All();
// In the ExtractIntel state: Send the data
shouldCollectData = false;
fsm.OnLogic();
recorder.Expect
.Logic("ExtractIntel")
.Exit("CollectData")
.Enter("SendData")
.Logic("SendData")
.All();
fsm.OnLogic();
recorder.Expect
.Logic("ExtractIntel")
.Logic("SendData")
.All();
// In the ExtractIntel state: Collect data
shouldCollectData = true;
fsm.OnLogic();
recorder.Expect
.Logic("ExtractIntel")
.Exit("SendData")
.Enter("CollectData")
.Logic("CollectData")
.All();
// Collect data is interrupted by the player who can now see the Spy Enemy on the edge
// of the radar.
isInPlayerScanningRange = true;
fsm.OnLogic();
recorder.Expect
.Exit("ExtractIntel")
.Exit("CollectData")
.Enter("FleeFromPlayer")
.Logic("FleeFromPlayer")
.All();
fsm.OnLogic();
recorder.Expect.Logic("FleeFromPlayer").All();
}