CommandStreamChannel block the duplicate call

add GameCommandHandlerTest
Create a CommandStreamChannelBuilder to inject maxCacheTime
Add missing empty disabled test
fix EventStreamInMemory.readAll

src/main/kotlin/eventDemo/app/command/GameCommandHandler.kt

@@ -11,6 +11,7 @@ import eventDemo.app.event.event.GameEvent
 import eventDemo.app.event.projection.GameStateRepository
 import eventDemo.app.notification.ErrorNotification
 import eventDemo.app.notification.Notification
+import eventDemo.libs.command.CommandStreamChannelBuilder
 import io.github.oshai.kotlinlogging.KotlinLogging
 import kotlinx.coroutines.channels.ReceiveChannel
 import kotlinx.coroutines.channels.SendChannel
@@ -23,6 +24,7 @@ import kotlinx.coroutines.channels.SendChannel
 class GameCommandHandler(
     private val eventHandler: GameEventHandler,
     private val gameStateRepository: GameStateRepository,
+    private val commandStreamChannel: CommandStreamChannelBuilder<GameCommand>,
 ) {
     private val logger = KotlinLogging.logger { }
 
@@ -33,27 +35,43 @@ class GameCommandHandler(
         player: Player,
         incomingCommandChannel: ReceiveChannel<GameCommand>,
         outgoingErrorChannelNotification: SendChannel<Notification>,
-    ) = GameCommandStream(incomingCommandChannel).process { command ->
+    ) = commandStreamChannel(incomingCommandChannel)
+        .process { command ->
             if (command.payload.player.id != player.id) {
+                logger.atWarn {
+                    message = "Handle command Refuse, the player of the command is not the same: $command"
+                    payload = mapOf("command" to command)
+                }
                 nack()
+            } else {
+                logger.atInfo {
+                    message = "Handle command: $command"
+                    payload = mapOf("command" to command)
+                }
+                command.run(outgoingErrorChannelNotification)
+            }
         }
 
-        val playerErrorNotifier: suspend (String) -> Unit = {
+    private suspend fun GameCommand.run(outgoingErrorChannelNotification: SendChannel<Notification>) {
+        val gameState = gameStateRepository.get(payload.gameId)
+        val playerErrorNotifier = errorNotifier(outgoingErrorChannelNotification)
+
+        when (this) {
+            is IWantToPlayCardCommand -> run(gameState, playerErrorNotifier, eventHandler)
+            is IamReadyToPlayCommand -> run(gameState, playerErrorNotifier, eventHandler)
+            is IWantToJoinTheGameCommand -> run(gameState, playerErrorNotifier, eventHandler)
+            is ICantPlayCommand -> run(gameState, playerErrorNotifier, eventHandler)
+        }
+    }
+}
+
+fun errorNotifier(channel: SendChannel<Notification>): suspend (String) -> Unit =
+    {
+        val logger = KotlinLogging.logger { }
         val notification = ErrorNotification(message = it)
         logger.atWarn {
             message = "Notification send ERROR: ${notification.message}"
             payload = mapOf("notification" to notification)
         }
-            outgoingErrorChannelNotification.send(notification)
+        channel.send(notification)
-        }
-
-        val gameState = gameStateRepository.get(command.payload.gameId)
-
-        when (command) {
-            is IWantToPlayCardCommand -> command.run(gameState, playerErrorNotifier, eventHandler)
-            is IamReadyToPlayCommand -> command.run(gameState, playerErrorNotifier, eventHandler)
-            is IWantToJoinTheGameCommand -> command.run(gameState, playerErrorNotifier, eventHandler)
-            is ICantPlayCommand -> command.run(gameState, playerErrorNotifier, eventHandler)
-        }
-    }
     }

src/main/kotlin/eventDemo/app/command/GameCommandRoute.kt

@@ -2,6 +2,7 @@ package eventDemo.app.command
 
 import eventDemo.app.entity.Player
 import eventDemo.app.eventListener.GameEventPlayerNotificationListener
+import eventDemo.app.notification.Notification
 import eventDemo.libs.fromFrameChannel
 import eventDemo.libs.toObjectChannel
 import io.ktor.server.application.ApplicationCall
@@ -12,6 +13,7 @@ import io.ktor.server.routing.Route
 import io.ktor.server.websocket.webSocket
 import kotlinx.coroutines.DelicateCoroutinesApi
 import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.channels.SendChannel
 import kotlinx.coroutines.launch
 
 @DelicateCoroutinesApi
@@ -22,14 +24,15 @@ fun Route.gameSocket(
     authenticate {
         webSocket("/game") {
             val currentPlayer = call.getPlayer()
+            val outgoingFrameChannel: SendChannel<Notification> = fromFrameChannel(outgoing)
             GlobalScope.launch {
                 commandHandler.handle(
                     currentPlayer,
                     toObjectChannel(incoming),
-                    fromFrameChannel(outgoing),
+                    outgoingFrameChannel,
                 )
             }
-            playerNotificationListener.startListening(outgoing, currentPlayer)
+            playerNotificationListener.startListening(outgoingFrameChannel, currentPlayer)
         }
     }
 }

src/main/kotlin/eventDemo/app/event/projection/GameStateRepository.kt

@@ -12,10 +12,10 @@ class GameStateRepository(
     eventHandler: GameEventHandler,
     private val maxSnapshotCacheSize: Int = 20,
 ) {
-    private val projections: MutableMap<GameId, GameState> = ConcurrentHashMap()
+    private val projections: ConcurrentHashMap<GameId, GameState> = ConcurrentHashMap()
     private val version: AtomicInteger = AtomicInteger(0)
-    private val projectionsSnapshot: MutableMap<GameEvent, GameState> = ConcurrentHashMap()
+    private val projectionsSnapshot: ConcurrentHashMap<GameEvent, GameState> = ConcurrentHashMap()
-    private val sortedSnapshotByVersion: MutableMap<GameEvent, Int> = ConcurrentHashMap()
+    private val sortedSnapshotByVersion: ConcurrentHashMap<GameEvent, Int> = ConcurrentHashMap()
 
     init {
         eventHandler.registerProjectionBuilder { event ->
@@ -68,8 +68,9 @@ class GameStateRepository(
      * It fetches it from the local cache if possible, otherwise it builds it.
      */
     fun get(gameId: GameId): GameState =
-        projections[gameId]
+        projections.computeIfAbsent(gameId) {
-            ?: gameId.buildStateFromEventStream(eventStream)
+            gameId.buildStateFromEventStream(eventStream)
+        }
 
     /**
      * Get the [GameState] to the specific [event][GameEvent].
@@ -78,8 +79,9 @@ class GameStateRepository(
      * It fetches it from the local cache if possible, otherwise it builds it.
      */
     fun getUntil(event: GameEvent): GameState =
-        projectionsSnapshot[event]
+        projectionsSnapshot.computeIfAbsent(event) {
-            ?: event.buildStateFromEventStreamTo(eventStream)
+            event.buildStateFromEventStreamTo(eventStream)
+        }
 
     private fun GameState.update() {
         projections[gameId] = this

src/main/kotlin/eventDemo/app/eventListener/GameEventPlayerNotificationListener.kt

@@ -23,9 +23,7 @@ import eventDemo.app.notification.PlayerWinNotification
 import eventDemo.app.notification.TheGameWasStartedNotification
 import eventDemo.app.notification.WelcomeToTheGameNotification
 import eventDemo.app.notification.YourNewCardNotification
-import eventDemo.shared.toFrame
 import io.github.oshai.kotlinlogging.KotlinLogging
-import io.ktor.websocket.Frame
 import kotlinx.coroutines.channels.SendChannel
 import kotlinx.coroutines.channels.trySendBlocking
 
@@ -36,7 +34,7 @@ class GameEventPlayerNotificationListener(
     private val logger = KotlinLogging.logger {}
 
     fun startListening(
-        outgoingNotificationChannel: SendChannel<Frame>,
+        outgoingNotificationChannel: SendChannel<Notification>,
         currentPlayer: Player,
     ) {
         eventBus.subscribe { event: GameEvent ->
@@ -45,7 +43,7 @@ class GameEventPlayerNotificationListener(
             fun Notification.send() {
                 if (currentState.players.contains(currentPlayer)) {
                     // Only notify players who have already joined the game.
-                    outgoingNotificationChannel.trySendBlocking(toFrame())
+                    outgoingNotificationChannel.trySendBlocking(this)
                     logger.atInfo {
                         message = "Notification for player ${currentPlayer.name} was SEND: ${this@send}"
                         payload = mapOf("notification" to this@send, "event" to event)

src/main/kotlin/eventDemo/configuration/ConfigureDI.kt

@@ -1,11 +1,13 @@
 package eventDemo.configuration
 
 import eventDemo.app.command.GameCommandHandler
+import eventDemo.app.command.command.GameCommand
 import eventDemo.app.event.GameEventBus
 import eventDemo.app.event.GameEventHandler
 import eventDemo.app.event.GameEventStream
 import eventDemo.app.event.projection.GameStateRepository
 import eventDemo.app.eventListener.GameEventPlayerNotificationListener
+import eventDemo.libs.command.CommandStreamChannelBuilder
 import eventDemo.libs.event.EventBusInMemory
 import eventDemo.libs.event.EventStreamInMemory
 import io.ktor.server.application.Application
@@ -33,6 +35,9 @@ val appKoinModule =
         single {
             GameStateRepository(get(), get())
         }
+        single {
+            CommandStreamChannelBuilder<GameCommand>()
+        }
 
         singleOf(::GameEventHandler)
         singleOf(::GameCommandHandler)

src/main/kotlin/eventDemo/libs/command/CommandStreamChannel.kt

@@ -2,19 +2,49 @@ package eventDemo.libs.command
 
 import io.github.oshai.kotlinlogging.KotlinLogging
 import kotlinx.coroutines.channels.ReceiveChannel
+import kotlinx.datetime.Clock
+import kotlinx.datetime.Instant
+import java.util.concurrent.ConcurrentHashMap
+import kotlin.time.Duration
+import kotlin.time.Duration.Companion.minutes
+
+class CommandStreamChannelBuilder<C : Command>(
+    private val maxCacheTime: Duration = 10.minutes,
+) {
+    operator fun invoke(incoming: ReceiveChannel<C>): CommandStreamChannel<C> = CommandStreamChannel(incoming, maxCacheTime)
+}
 
 /**
  * Manage [Command]'s with kotlin Channel
  */
 class CommandStreamChannel<C : Command>(
     private val incoming: ReceiveChannel<C>,
+    private val maxCacheTime: Duration = 10.minutes,
 ) : CommandStream<C> {
     private val logger = KotlinLogging.logger {}
+    private val executedCommand: ConcurrentHashMap<CommandId, Pair<Boolean, Instant>> = ConcurrentHashMap()
 
     override suspend fun process(action: CommandBlock<C>) {
         for (command in incoming) {
+            val now = Clock.System.now()
+            val (status, _) = executedCommand.computeIfAbsent(command.id) { Pair(false, now) }
+
+            if (status) {
+                logger.atWarn {
+                    message = "Command already executed: $command"
+                    payload = mapOf("command" to command)
+                }
+            } else {
                 compute(command, action)
             }
+            executedCommand
+                .filterValues { (_, date) ->
+                    (date + maxCacheTime) > now
+                }.keys
+                .forEach {
+                    executedCommand.remove(it)
+                }
+        }
     }
 
     private suspend fun compute(

src/main/kotlin/eventDemo/libs/event/EventStreamInMemory.kt

@@ -36,7 +36,10 @@ class EventStreamInMemory<E : Event<ID>, ID : AggregateId> : EventStream<E, ID>
             .filterIsInstance(eventType.java)
             .lastOrNull { it.gameId == aggregateId }
 
-    override fun readAll(aggregateId: ID): Set<E> = events.toSet()
+    override fun readAll(aggregateId: ID): Set<E> =
+        events
+            .filter { it.gameId == aggregateId }
+            .toSet()
 }
 
 inline fun <reified R : E, E : Event<ID>, ID : AggregateId> EventStream<E, ID>.readLastOf(aggregateId: ID): R? =

src/main/kotlin/eventDemo/shared/FrameConverter.kt

@@ -1,24 +0,0 @@
-package eventDemo.shared
-
-import eventDemo.app.command.command.GameCommand
-import eventDemo.app.event.event.GameEvent
-import eventDemo.app.notification.Notification
-import io.ktor.websocket.Frame
-import io.ktor.websocket.readText
-import kotlinx.serialization.json.Json
-
-fun Frame.Text.toEvent(): GameEvent = Json.decodeFromString(GameEvent.serializer(), readText())
-
-fun GameEvent.toFrame(): Frame.Text = Frame.Text(Json.encodeToString(GameEvent.serializer(), this))
-
-fun Frame.Text.toCommand(): GameCommand = Json.decodeFromString(GameCommand.serializer(), readText())
-
-fun GameCommand.toFrame(): Frame.Text = Frame.Text(Json.encodeToString(GameCommand.serializer(), this))
-
-fun Frame.toNotification(): Notification =
-    Json.decodeFromString(
-        Notification.serializer(),
-        (this as Frame.Text).readText(),
-    )
-
-fun Notification.toFrame(): Frame.Text = Frame.Text(Json.encodeToString(Notification.serializer(), this))

src/test/kotlin/eventDemo/app/command/GameCommandHandlerTest.kt

@@ -0,0 +1,43 @@
+package eventDemo.app.command
+
+import eventDemo.app.command.command.GameCommand
+import eventDemo.app.command.command.IWantToJoinTheGameCommand
+import eventDemo.app.entity.GameId
+import eventDemo.app.entity.Player
+import eventDemo.app.eventListener.GameEventPlayerNotificationListener
+import eventDemo.app.eventListener.GameEventReactionListener
+import eventDemo.app.notification.Notification
+import eventDemo.app.notification.WelcomeToTheGameNotification
+import eventDemo.configuration.appKoinModule
+import io.kotest.core.spec.style.FunSpec
+import io.kotest.matchers.collections.shouldContain
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.launch
+import org.koin.dsl.koinApplication
+import kotlin.test.assertIs
+
+class GameCommandHandlerTest :
+    FunSpec({
+        test("handle a command should execute the command") {
+            koinApplication { modules(appKoinModule) }.koin.apply {
+                val commandHandler by inject<GameCommandHandler>()
+                val notificationListener by inject<GameEventPlayerNotificationListener>()
+                val gameId = GameId()
+                val player = Player("Tesla")
+                val channelCommand = Channel<GameCommand>(Channel.BUFFERED)
+                val channelNotification = Channel<Notification>(Channel.BUFFERED)
+                GameEventReactionListener(get(), get(), get()).init()
+                notificationListener.startListening(channelNotification, player)
+
+                GlobalScope.launch {
+                    commandHandler.handle(player, channelCommand, channelNotification)
+                }
+
+                channelCommand.send(IWantToJoinTheGameCommand(IWantToJoinTheGameCommand.Payload(gameId, player)))
+                assertIs<WelcomeToTheGameNotification>(channelNotification.receive()).let {
+                    it.players shouldContain player
+                }
+            }
+        }
+    })

src/test/kotlin/eventDemo/app/command/command/ICantPlayCommandTest.kt

@@ -0,0 +1,9 @@
+package eventDemo.app.command.command
+
+import io.kotest.core.spec.style.FunSpec
+
+class ICantPlayCommandTest :
+    FunSpec({
+
+        xtest("run should publish the event") { }
+    })

src/test/kotlin/eventDemo/app/command/command/IWantToJoinTheGameCommandTest.kt

@@ -0,0 +1,9 @@
+package eventDemo.app.command.command
+
+import io.kotest.core.spec.style.FunSpec
+
+class IWantToJoinTheGameCommandTest :
+    FunSpec({
+
+        xtest("run should publish the event") { }
+    })

src/test/kotlin/eventDemo/app/command/command/IWantToPlayCardCommandTest.kt

@@ -0,0 +1,9 @@
+package eventDemo.app.command.command
+
+import io.kotest.core.spec.style.FunSpec
+
+class IWantToPlayCardCommandTest :
+    FunSpec({
+
+        xtest("run should publish the event") { }
+    })

src/test/kotlin/eventDemo/app/command/command/IamReadyToPlayCommandTest.kt

@@ -0,0 +1,9 @@
+package eventDemo.app.command.command
+
+import io.kotest.core.spec.style.FunSpec
+
+class IamReadyToPlayCommandTest :
+    FunSpec({
+
+        xtest("run should publish the event") { }
+    })

src/test/kotlin/eventDemo/app/entity/DeckTest.kt

@@ -24,7 +24,7 @@ class DeckTest :
             deck.allCards().map { it.id }.shouldBeUnique()
         }
 
-        test("initHands") {
+        test("initHands should be generate the hands of all players from the stack") {
             // Given
             val playerNumbers = 4
             val players = (1..playerNumbers).map { Player(name = "name $it") }.toSet()
@@ -41,7 +41,7 @@ class DeckTest :
             initDeck.allCardCount() shouldBeExactly totalCardsNumber
         }
 
-        test("takeOneCardFromStackTo") {
+        test("takeOneCardFromStackTo player") {
             // Given
             val playerNumbers = 4
             val players = (1..playerNumbers).map { Player(name = "name $it") }.toSet()
@@ -89,7 +89,6 @@ class DeckTest :
             val playerNumbers = 4
             val players = (1..playerNumbers).map { Player(name = "name $it") }.toSet()
             val deck = Deck.newWithoutPlayers().initHands(players)
-            val firstPlayer = players.first()
 
             // When
             val modifiedDeck = deck.placeFirstCardOnDiscard()

src/test/kotlin/eventDemo/app/entity/PlayersHandsTest.kt

@@ -0,0 +1,15 @@
+package eventDemo.app.entity
+
+import io.kotest.core.spec.style.FunSpec
+
+class PlayersHandsTest :
+    FunSpec({
+
+        xtest("getHand should return the hand of the player") { }
+
+        xtest("removeCard should remove the card") { }
+
+        xtest("addCard should add the card to the correct hand") { }
+
+        xtest("toPlayersHands should build object from map") { }
+    })

src/test/kotlin/eventDemo/app/event/GameEventHandlerTest.kt

@@ -0,0 +1,10 @@
+package eventDemo.app.event
+
+import io.kotest.core.spec.style.FunSpec
+
+class GameEventHandlerTest :
+    FunSpec({
+        xtest("handle event should publish the event to the stream") { }
+        xtest("handle event should build the registered projection") { }
+        xtest("handle event should publish the event to the bus") { }
+    })

src/test/kotlin/eventDemo/app/event/projection/GameStateRepositoryTest.kt

@@ -0,0 +1,16 @@
+package eventDemo.app.event.projection
+
+import io.kotest.core.spec.style.FunSpec
+
+class GameStateRepositoryTest :
+    FunSpec({
+        xtest("GameStateRepository should build the projection when a new event occurs") { }
+
+        xtest("get should build the last version of the state") { }
+        xtest("get should be concurrently secure") { }
+        xtest("get should be concurrently secure") { }
+
+        xtest("getUntil should build the state until the event") { }
+        xtest("call getUntil twice should get the state from the cache") { }
+        xtest("getUntil should be concurrently secure") { }
+    })

src/test/kotlin/eventDemo/app/event/projection/GameStateTest.kt

@@ -0,0 +1,15 @@
+package eventDemo.app.event.projection
+
+import io.kotest.core.spec.style.FunSpec
+
+class GameStateTest :
+    FunSpec({
+        xtest("isReady") { }
+        xtest("nextPlayer") { }
+        xtest("nextPlayerTurn") { }
+        xtest("playerDiffIndex") { }
+        xtest("cardOnBoardIsForYou") { }
+        xtest("playableCards") { }
+        xtest("playerHasNoCardLeft") { }
+        xtest("canBePlayThisCard") { }
+    })

src/test/kotlin/eventDemo/app/query/GameStateRouteTest.kt

@@ -50,7 +50,7 @@ class GameStateRouteTest :
                     }.apply {
                         assertEquals(HttpStatusCode.OK, status, message = bodyAsText())
                         val state = call.body<GameState>()
-                        assertEquals(id, state.gameId)
+                        id shouldBeEqual state.gameId
                         state.players shouldHaveSize 0
                         state.isStarted shouldBeEqual false
                     }

src/test/kotlin/eventDemo/app/query/GameStateTest.kt

@@ -1,6 +1,7 @@
 package eventDemo.app.query
 
 import eventDemo.app.command.GameCommandHandler
+import eventDemo.app.command.command.GameCommand
 import eventDemo.app.command.command.IWantToJoinTheGameCommand
 import eventDemo.app.command.command.IWantToPlayCardCommand
 import eventDemo.app.command.command.IamReadyToPlayCommand
@@ -14,20 +15,16 @@ import eventDemo.app.event.projection.buildStateFromEventStream
 import eventDemo.app.eventListener.GameEventPlayerNotificationListener
 import eventDemo.app.eventListener.GameEventReactionListener
 import eventDemo.app.notification.ItsTheTurnOfNotification
+import eventDemo.app.notification.Notification
 import eventDemo.app.notification.PlayerAsJoinTheGameNotification
 import eventDemo.app.notification.PlayerAsPlayACardNotification
 import eventDemo.app.notification.PlayerWasReadyNotification
 import eventDemo.app.notification.TheGameWasStartedNotification
 import eventDemo.app.notification.WelcomeToTheGameNotification
 import eventDemo.configuration.appKoinModule
-import eventDemo.libs.fromFrameChannel
-import eventDemo.libs.toObjectChannel
-import eventDemo.shared.toFrame
-import eventDemo.shared.toNotification
 import io.kotest.core.spec.style.FunSpec
 import io.kotest.matchers.collections.shouldHaveSize
 import io.kotest.matchers.equals.shouldBeEqual
-import io.ktor.websocket.Frame
 import kotlinx.coroutines.DelicateCoroutinesApi
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
@@ -48,46 +45,46 @@ class GameStateTest :
             val id = GameId()
             val player1 = Player(name = "Nikola")
             val player2 = Player(name = "Einstein")
-            val channelCommand1 = Channel<Frame>(Channel.BUFFERED)
+            val channelCommand1 = Channel<GameCommand>(Channel.BUFFERED)
-            val channelCommand2 = Channel<Frame>(Channel.BUFFERED)
+            val channelCommand2 = Channel<GameCommand>(Channel.BUFFERED)
-            val channelNotification1 = Channel<Frame>(Channel.BUFFERED)
+            val channelNotification1 = Channel<Notification>(Channel.BUFFERED)
-            val channelNotification2 = Channel<Frame>(Channel.BUFFERED)
+            val channelNotification2 = Channel<Notification>(Channel.BUFFERED)
 
             var playedCard1: Card? = null
             var playedCard2: Card? = null
 
             val player1Job =
                 launch {
-                    channelCommand1.send(IWantToJoinTheGameCommand(IWantToJoinTheGameCommand.Payload(id, player1)).toFrame())
+                    channelCommand1.send(IWantToJoinTheGameCommand(IWantToJoinTheGameCommand.Payload(id, player1)))
-                    channelNotification1.receive().toNotification().let {
+                    channelNotification1.receive().let {
                         assertIs<WelcomeToTheGameNotification>(it).players shouldBeEqual setOf(player1)
                     }
-                    channelNotification1.receive().toNotification().let {
+                    channelNotification1.receive().let {
                         assertIs<PlayerAsJoinTheGameNotification>(it).player shouldBeEqual player2
                     }
-                    channelCommand1.send(IamReadyToPlayCommand(IamReadyToPlayCommand.Payload(id, player1)).toFrame())
+                    channelCommand1.send(IamReadyToPlayCommand(IamReadyToPlayCommand.Payload(id, player1)))
-                    channelNotification1.receive().toNotification().let {
+                    channelNotification1.receive().let {
                         assertIs<PlayerWasReadyNotification>(it).player shouldBeEqual player2
                     }
                     val player1Hand =
-                        channelNotification1.receive().toNotification().let {
+                        channelNotification1.receive().let {
                             assertIs<TheGameWasStartedNotification>(it).hand shouldHaveSize 7
                         }
                     playedCard1 = player1Hand.first()
-                    channelNotification1.receive().toNotification().let {
+                    channelNotification1.receive().let {
                         assertIs<ItsTheTurnOfNotification>(it).apply {
                             player shouldBeEqual player1
                         }
                     }
-                    channelCommand1.send(IWantToPlayCardCommand(IWantToPlayCardCommand.Payload(id, player1, player1Hand.first())).toFrame())
+                    channelCommand1.send(IWantToPlayCardCommand(IWantToPlayCardCommand.Payload(id, player1, player1Hand.first())))
 
-                    channelNotification1.receive().toNotification().let {
+                    channelNotification1.receive().let {
                         assertIs<ItsTheTurnOfNotification>(it).apply {
                             player shouldBeEqual player2
                         }
                     }
 
-                    channelNotification1.receive().toNotification().let {
+                    channelNotification1.receive().let {
                         assertIs<PlayerAsPlayACardNotification>(it).apply {
                             player shouldBeEqual player2
                             card shouldBeEqual assertNotNull(playedCard2)
@@ -98,24 +95,24 @@ class GameStateTest :
             val player2Job =
                 launch {
                     delay(100)
-                    channelCommand2.send(IWantToJoinTheGameCommand(IWantToJoinTheGameCommand.Payload(id, player2)).toFrame())
+                    channelCommand2.send(IWantToJoinTheGameCommand(IWantToJoinTheGameCommand.Payload(id, player2)))
-                    channelNotification2.receive().toNotification().let {
+                    channelNotification2.receive().let {
                         assertIs<WelcomeToTheGameNotification>(it).players shouldBeEqual setOf(player1, player2)
                     }
-                    channelNotification2.receive().toNotification().let {
+                    channelNotification2.receive().let {
                         assertIs<PlayerWasReadyNotification>(it).player shouldBeEqual player1
                     }
-                    channelCommand2.send(IamReadyToPlayCommand(IamReadyToPlayCommand.Payload(id, player2)).toFrame())
+                    channelCommand2.send(IamReadyToPlayCommand(IamReadyToPlayCommand.Payload(id, player2)))
                     val player2Hand =
-                        channelNotification2.receive().toNotification().let {
+                        channelNotification2.receive().let {
                             assertIs<TheGameWasStartedNotification>(it).hand shouldHaveSize 7
                         }
-                    channelNotification2.receive().toNotification().let {
+                    channelNotification2.receive().let {
                         assertIs<ItsTheTurnOfNotification>(it).apply {
                             player shouldBeEqual player1
                         }
                     }
-                    channelNotification2.receive().toNotification().let {
+                    channelNotification2.receive().let {
                         assertIs<PlayerAsPlayACardNotification>(it).apply {
                             player shouldBeEqual player1
                             card shouldBeEqual assertNotNull(playedCard1)
@@ -123,12 +120,12 @@ class GameStateTest :
                     }
                     playedCard2 = player2Hand.first()
 
-                    channelNotification2.receive().toNotification().let {
+                    channelNotification2.receive().let {
                         assertIs<ItsTheTurnOfNotification>(it).apply {
                             player shouldBeEqual player2
                         }
                     }
-                    channelCommand2.send(IWantToPlayCardCommand(IWantToPlayCardCommand.Payload(id, player2, player2Hand.first())).toFrame())
+                    channelCommand2.send(IWantToPlayCardCommand(IWantToPlayCardCommand.Payload(id, player2, player2Hand.first())))
                 }
 
             koinApplication { modules(appKoinModule) }.koin.apply {
@@ -140,10 +137,10 @@ class GameStateTest :
                 playerNotificationListener.startListening(channelNotification2, player2)
 
                 GlobalScope.launch(Dispatchers.IO) {
-                    commandHandler.handle(player1, toObjectChannel(channelCommand1), fromFrameChannel(channelNotification1))
+                    commandHandler.handle(player1, channelCommand1, channelNotification1)
                 }
                 GlobalScope.launch(Dispatchers.IO) {
-                    commandHandler.handle(player2, toObjectChannel(channelCommand2), fromFrameChannel(channelNotification2))
+                    commandHandler.handle(player2, channelCommand2, channelNotification2)
                 }
 
                 joinAll(player1Job, player2Job)

src/test/kotlin/eventDemo/libs/event/EventBusInMemoryTest.kt

@@ -0,0 +1,10 @@
+package eventDemo.libs.event
+
+import io.kotest.core.spec.style.FunSpec
+
+class EventBusInMemoryTest :
+    FunSpec({
+
+        xtest("publish should call the subscribed functions") { }
+        xtest("publish should call the subscribed functions on the priority order") { }
+    })

src/test/kotlin/eventDemo/libs/event/EventStreamInMemoryTest.kt

@@ -0,0 +1,16 @@
+package eventDemo.libs.event
+
+import io.kotest.core.spec.style.FunSpec
+
+class EventStreamInMemoryTest :
+    FunSpec({
+
+        xtest("publish should be concurrently secure") { }
+
+        xtest("readLast should only return the event of aggregate") { }
+        xtest("readLast should return the last event of the aggregate") { }
+
+        xtest("readLastOf should return the last event of the aggregate of the type") { }
+
+        xtest("readAll should only return the event of aggregate") { }
+    })