From ead5e310ac67a41d205ff94a4d58b7e715e3ae38 Mon Sep 17 00:00:00 2001
From: Mikhail Fedotov <nosik90@gmail.com>
Date: Wed, 23 Oct 2024 22:26:08 +0300
Subject: [PATCH] Add test to reproduce the github issue

https://github.com/KStateMachine/kstatemachine/issues/101
There should be no exception with initalChoiseState inside data state. But data field cannot be accessed there as the state is not activated during choise calculation.
---
 .../kstatemachine/state/ChoiceStateTest.kt    | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/tests/src/commonTest/kotlin/ru/nsk/kstatemachine/state/ChoiceStateTest.kt b/tests/src/commonTest/kotlin/ru/nsk/kstatemachine/state/ChoiceStateTest.kt
index 2471f47..5840971 100644
--- a/tests/src/commonTest/kotlin/ru/nsk/kstatemachine/state/ChoiceStateTest.kt
+++ b/tests/src/commonTest/kotlin/ru/nsk/kstatemachine/state/ChoiceStateTest.kt
@@ -13,6 +13,8 @@ import io.kotest.matchers.shouldBe
 import io.mockk.verifySequence
 import ru.nsk.kstatemachine.*
 import ru.nsk.kstatemachine.event.DataEvent
+import ru.nsk.kstatemachine.event.defaultDataExtractor
+import ru.nsk.kstatemachine.state.ChoiceStateTestData.IntEvent
 import ru.nsk.kstatemachine.state.ChoiceStateTestData.State1
 import ru.nsk.kstatemachine.state.ChoiceStateTestData.State2
 import ru.nsk.kstatemachine.statemachine.StateMachine
@@ -22,6 +24,8 @@ import ru.nsk.kstatemachine.statemachine.processEventBlocking
 private object ChoiceStateTestData {
     object State1 : DefaultState()
     object State2 : DefaultState()
+
+    class IntEvent(override val data: Int) : DataEvent<Int>
 }
 
 class ChoiceStateTest : StringSpec({
@@ -155,5 +159,21 @@ class ChoiceStateTest : StringSpec({
                 callbacks.onStateEntry(intState2)
             }
         }
+
+
+        "Try reproduce https://github.com/KStateMachine/kstatemachine/issues/101" {
+            lateinit var state3: State
+            val machine = createTestStateMachine(coroutineStarterType) {
+                state3 = state("state3")
+                val state2 = dataState<Int>("dataState3") {
+                    initialChoiceState { state3 }
+                }
+                initialState("state1") {
+                    dataTransition<IntEvent, Int> { targetState = state2 }
+                }
+            }
+            machine.processEvent(IntEvent(42))
+            machine.activeStates().shouldContainExactly(state3)
+        }
     }
 })
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