Added a new set of test actions

Libplanet.SDK.Action.Tests/SimpleRPG/Actions/AvatarAction.cs

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+using Bencodex.Types;
+using Libplanet.Action;
+using Libplanet.Crypto;
+using Libplanet.SDK.Action.Attributes;
+using Libplanet.SDK.Action.Tests.SimpleRPG.Models;
+
+namespace Libplanet.SDK.Action.Tests.SimpleRPG.Actions
+{
+    [ActionType("Avatar")]
+    public class AvatarAction : ActionBase
+    {
+        // This has no IAccount associated with its domain.
+        public override Address StorageAddress => default;
+
+        [Executable]
+        public void Create(IValue args)
+        {
+            string name = (Text)args;
+            Call<InfoAction, Info>("Create", new object?[] { name });
+            Call<InventoryAction, Inventory>("Create");
+        }
+
+        [Callable]
+        public Avatar GetAvatar(Address address)
+        {
+            Info info = Call<InfoAction, Info>(
+                "GetInfo",
+                new object?[] { address });
+            Inventory inventory = Call<InventoryAction, Inventory>(
+                "GetInventory",
+                new object?[] { address });
+            return new Avatar(info, inventory);
+        }
+
+        [Callable]
+        public void SetAvatar(Address address, Avatar avatar)
+        {
+            Call<InfoAction>(
+                "SetInfo",
+                new object?[] { address, avatar.Info });
+            Call<InventoryAction>(
+                "SetInventory",
+                new object?[] { address, avatar.Inventory });
+        }
+    }
+}

Libplanet.SDK.Action.Tests/SimpleRPG/Actions/FarmAction.cs

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+using Bencodex.Types;
+using Libplanet.Action;
+using Libplanet.Crypto;
+using Libplanet.SDK.Action.Attributes;
+using Libplanet.SDK.Action.Tests.SimpleRPG.Models;
+
+namespace Libplanet.SDK.Action.Tests.SimpleRPG.Actions
+{
+    [ActionType("Farm")]
+    public class FarmAction : ActionBase
+    {
+        public const int ExpPerFarm = 10;
+        public const int GoldPerFarm = 20;
+
+        // This has no IAccount associated with its domain.
+        public override Address StorageAddress => default;
+
+        [Executable]
+        public void Farm(IValue args)
+        {
+            // Simple type checking.
+            _ = (Null)args;
+
+            Avatar avatar = Call<AvatarAction, Avatar>("GetAvatar", new object?[] { Signer });
+            avatar.Info.AddExp(ExpPerFarm);
+            avatar.Inventory.AddGold(GoldPerFarm);
+            Call<AvatarAction>("SetAvatar", new object?[] { Signer, avatar });
+        }
+    }
+}

Libplanet.SDK.Action.Tests/SimpleRPG/Actions/InfoAction.cs

@@ -0,0 +1,33 @@
+using Libplanet.Crypto;
+using Libplanet.SDK.Action.Attributes;
+using Libplanet.SDK.Action.Tests.SimpleRPG.Models;
+
+namespace Libplanet.SDK.Action.Tests.SimpleRPG.Actions
+{
+    public class InfoAction : ActionBase
+    {
+        public override Address StorageAddress =>
+            new Address("0x1000000000000000000000000000000000000001");
+
+        [Callable]
+        public Info Create(string name)
+        {
+            if (GetState(Signer) is { } value)
+            {
+                throw new InvalidOperationException("Info already exists.");
+            }
+
+            Info info = new Info(name, 0);
+            SetInfo(Signer, info);
+            return info;
+        }
+
+        [Callable]
+        public Info GetInfo(Address address) =>
+            new Info(GetState(address) ?? throw new NullReferenceException());
+
+        [Callable]
+        public void SetInfo(Address address, Info info) =>
+            SetState(address, info.Serialized);
+    }
+}

Libplanet.SDK.Action.Tests/SimpleRPG/Actions/InventoryAction.cs

@@ -0,0 +1,33 @@
+using Libplanet.Crypto;
+using Libplanet.SDK.Action.Attributes;
+using Libplanet.SDK.Action.Tests.SimpleRPG.Models;
+
+namespace Libplanet.SDK.Action.Tests.SimpleRPG.Actions
+{
+    public class InventoryAction : ActionBase
+    {
+        public override Address StorageAddress =>
+            new Address("0x1000000000000000000000000000000000000002");
+
+        [Callable]
+        public Inventory Create()
+        {
+            if (GetState(Signer) is { })
+            {
+                throw new InvalidOperationException("Inventory already exists.");
+            }
+
+            Inventory inventory = new Inventory();
+            SetInventory(Signer, inventory);
+            return inventory;
+        }
+
+        [Callable]
+        public Inventory GetInventory(Address address) =>
+            new Inventory(GetState(address) ?? throw new NullReferenceException());
+
+        [Callable]
+        public void SetInventory(Address address, Inventory inventory) =>
+            SetState(address, inventory.Serialized);
+    }
+}

Libplanet.SDK.Action.Tests/SimpleRPG/Models/Avatar.cs

@@ -0,0 +1,14 @@
+namespace Libplanet.SDK.Action.Tests.SimpleRPG.Models
+{
+    public class Avatar
+    {
+        public Info Info { get; }
+        public Inventory Inventory { get; }
+
+        public Avatar(Info info, Inventory inventory)
+        {
+            Info = info;
+            Inventory = inventory;
+        }
+    }
+}

Libplanet.SDK.Action.Tests/SimpleRPG/Models/Info.cs

@@ -0,0 +1,38 @@
+using Bencodex.Types;
+
+namespace Libplanet.SDK.Action.Tests.SimpleRPG.Models
+{
+    public class Info
+    {
+        public string Name { get; }
+
+        public int Exp { get; private set; }
+
+        public int Level => (Exp / 100);
+
+        public Info(string name)
+            : this(name, 0)
+        {
+        }
+
+        public Info(IValue value)
+            : this((Text)((List)value)[0], (Integer)((List)value)[1])
+        {
+        }
+
+        public Info(string name, int exp)
+        {
+            Name = name;
+            Exp = exp;
+        }
+
+        public IValue Serialized => List.Empty
+            .Add(Name)
+            .Add(Exp);
+
+        public void AddExp(int exp)
+        {
+            Exp = Exp + exp;
+        }
+    }
+}

Libplanet.SDK.Action.Tests/SimpleRPG/Models/Inventory.cs

@@ -0,0 +1,31 @@
+using Bencodex.Types;
+
+namespace Libplanet.SDK.Action.Tests.SimpleRPG.Models
+{
+    public class Inventory
+    {
+        public int Gold { get; private set; }
+
+        public Inventory()
+            : this(0)
+        {
+        }
+
+        public Inventory(IValue value)
+            : this((int)(Integer)value)
+        {
+        }
+
+        public Inventory(int gold)
+        {
+            Gold = gold;
+        }
+
+        public IValue Serialized => new Integer(Gold);
+
+        public void AddGold(int gold)
+        {
+            Gold = Gold + gold;
+        }
+    }
+}

Libplanet.SDK.Action.Tests/SimpleRPG/SimpleRPGActionsTest.cs

@@ -0,0 +1,118 @@
+using System.Collections.Immutable;
+using System.Reflection;
+using Bencodex.Types;
+using Libplanet.Action;
+using Libplanet.Action.Loader;
+using Libplanet.Action.State;
+using Libplanet.Crypto;
+using Libplanet.SDK.Action.Tests.SimpleRPG.Actions;
+using Libplanet.SDK.Action.Tests.SimpleRPG.Models;
+using Libplanet.Store;
+using Libplanet.Store.Trie;
+using Libplanet.Types.Blocks;
+using Xunit;
+
+namespace Libplanet.SDK.Action.Tests.Sample
+{
+    public class SimpleRPGActionsTest
+    {
+        private TypedActionLoader _loader;
+        private IStateStore _stateStore;
+        private IWorld _world;
+
+        public SimpleRPGActionsTest()
+        {
+            _loader = new TypedActionLoader(
+                ImmutableDictionary<IValue, Type>.Empty
+                    .Add(new Text("Avatar"), typeof(AvatarAction))
+                    .Add(new Text("Farm"), typeof(FarmAction)));
+
+            _stateStore = new TrieStateStore(new MemoryKeyValueStore());
+
+            ITrie trie = _stateStore.GetStateRoot(null);
+            trie = trie.SetMetadata(new TrieMetadata(Block.CurrentProtocolVersion));
+            trie = _stateStore.Commit(trie);
+            _world = new World(new WorldBaseState(trie, _stateStore));
+        }
+
+        [Theory]
+        [InlineData(false)]
+        [InlineData(true)]
+        public void Scenario(bool commit)
+        {
+            IValue plainValue = Dictionary.Empty
+                .Add("type_id", "Avatar")
+                .Add("call", "Create")
+                .Add("args", "Hero");
+            IAction action = Assert.IsType<AvatarAction>(_loader.LoadAction(0, plainValue));
+            Address signer = new PrivateKey().Address;
+            IWorld world = _world;
+
+            world = action.Execute(new MockActionContext(signer, signer, world));
+            world = commit ? _stateStore.CommitWorld(world) : world;
+            Assert.Equal(
+                new Info("Hero").Serialized,
+                world
+                    .GetAccountState(new Address("0x1000000000000000000000000000000000000001"))
+                    .GetState(signer));
+            Assert.Equal(
+                new Inventory().Serialized,
+                world
+                    .GetAccountState(new Address("0x1000000000000000000000000000000000000002"))
+                    .GetState(signer));
+
+            const int repeat = 3;
+            foreach (var _ in Enumerable.Range(0, repeat))
+            {
+                plainValue = Dictionary.Empty
+                    .Add("type_id", "Farm")
+                    .Add("call", "Farm")
+                    .Add("args", Null.Value);
+                action = Assert.IsType<FarmAction>(_loader.LoadAction(0, plainValue));
+                world = action.Execute(new MockActionContext(signer, signer, world));
+                world = commit ? _stateStore.CommitWorld(world) : world;
+            }
+
+            Assert.Equal(
+                new Info("Hero", FarmAction.ExpPerFarm * repeat).Serialized,
+                world
+                    .GetAccountState(new Address("0x1000000000000000000000000000000000000001"))
+                    .GetState(signer));
+            Assert.Equal(
+                new Inventory(FarmAction.GoldPerFarm * repeat).Serialized,
+                world
+                    .GetAccountState(new Address("0x1000000000000000000000000000000000000002"))
+                    .GetState(signer));
+        }
+
+        [Fact]
+        public void CannotCreateTwice()
+        {
+            IValue plainValue = Dictionary.Empty
+                .Add("type_id", "Avatar")
+                .Add("call", "Create")
+                .Add("args", "Hero");
+            IAction action = Assert.IsType<AvatarAction>(_loader.LoadAction(0, plainValue));
+            Address signer = new PrivateKey().Address;
+            IWorld world = _world;
+
+            world = action.Execute(new MockActionContext(signer, signer, world));
+            world = _stateStore.CommitWorld(world);
+
+            plainValue = Dictionary.Empty
+                .Add("type_id", "Avatar")
+                .Add("call", "Create")
+                .Add("args", "Princess");
+            action = Assert.IsType<AvatarAction>(_loader.LoadAction(0, plainValue));
+            Assert.Contains(
+                "Info already exists",
+                Assert.IsType<InvalidOperationException>(
+                    Assert.IsType<TargetInvocationException>(
+                        Assert.Throws<TargetInvocationException>(() =>
+                            action.Execute(new MockActionContext(signer, signer, world)))
+                            .InnerException)
+                        .InnerException)
+                    .Message);
+        }
+    }
+}