func getLocationRules() fsm.Ruleset {
rules := fsm.Ruleset{}
rules.AddTransition(fsm.T{"town", "forest"})
rules.AddTransition(fsm.T{"forest", "battle"})
rules.AddRule(fsm.T{"town", "forest"}, func(subject fsm.Stater, goal fsm.State) bool {
println("You must have enough energy to go to forest.")
return true
})
return rules
}
func NewWindowRules() fsm.Ruleset {
rules := fsm.Ruleset{}
rules.AddTransition(fsm.T{"title", "character selection"})
rules.AddTransition(fsm.T{"character selection", "game"})
rules.AddTransition(fsm.T{"character selection", "create character"})
rules.AddRule(fsm.T{"title", "character selection"}, func(subject fsm.Stater, goal fsm.State) bool {
return true
})
return rules
}
func NewBattleRules() fsm.Ruleset {
rules := fsm.Ruleset{}
rules.AddTransition(fsm.T{"wait", "attack"})
rules.AddTransition(fsm.T{"wait", "run"})
rules.AddTransition(fsm.T{"wait", "use item"})
rules.AddTransition(fsm.T{"wait", "end"})
rules.AddRule(fsm.T{"wait", "attack"}, func(subject fsm.Stater, goal fsm.State) bool {
return true
})
return rules
}
func TestRulesetParallelGuarding(t *testing.T) {
rules := fsm.Ruleset{}
rules.AddTransition(fsm.T{"pending", "started"})
rules.AddTransition(fsm.T{"started", "finished"})
// Add two failing rules, the slow should be caught first
rules.AddRule(fsm.T{"started", "finished"}, func(subject fsm.Stater, goal fsm.State) bool {
time.Sleep(1 * time.Second)
t.Error("Slow rule should have been short-circuited")
return false
})
rules.AddRule(fsm.T{"started", "finished"}, func(subject fsm.Stater, goal fsm.State) bool {
return false
})
st.Expect(t, rules.Permitted(&Thing{State: "started"}, "finished"), false)
}
func BenchmarkRulesetParallelGuarding(b *testing.B) {
rules := fsm.Ruleset{}
rules.AddTransition(fsm.T{"pending", "started"})
rules.AddTransition(fsm.T{"started", "finished"})
// Add two failing rules, one very slow and the other terribly fast
rules.AddRule(fsm.T{"started", "finished"}, func(subject fsm.Stater, goal fsm.State) bool {
time.Sleep(1 * time.Second)
return false
})
rules.AddRule(fsm.T{"started", "finished"}, func(subject fsm.Stater, goal fsm.State) bool {
return false
})
b.ResetTimer()
for i := 0; i < b.N; i++ {
rules.Permitted(&Thing{State: "started"}, "finished")
}
}
func BenchmarkRulesetRuleForbids(b *testing.B) {
// Here, we explicity create a transition that is forbidden. This simulates an
// otherwise valid transition that would be denied based on a user role or the like.
// It should be slower than a standard invalid transition, since we have to
// actually execute a function to perform the check. The first guard to
// fail (returning false) will short circuit the execution, getting some some speed.
rules := fsm.Ruleset{}
rules.AddTransition(fsm.T{"pending", "started"})
rules.AddRule(fsm.T{"started", "finished"}, func(subject fsm.Stater, goal fsm.State) bool {
return false
})
some_thing := &Thing{State: "started"}
b.ResetTimer()
for i := 0; i < b.N; i++ {
rules.Permitted(some_thing, "finished")
}
}