Add Akka.Hosting.TestKit module

Akka.Hosting.sln

@@ -41,6 +41,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Akka.Persistence.Hosting.Te
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Akka.Hosting.LoggingDemo", "src\Examples\Akka.Hosting.LoggingDemo\Akka.Hosting.LoggingDemo.csproj", "{4F79325B-9EE7-4501-800F-7A1F8DFBCC80}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Akka.Hosting.TestKit", "src\Akka.Hosting.TestKit\Akka.Hosting.TestKit.csproj", "{E28D4F3C-6C34-497B-BDC8-F2B3EA8BA309}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Akka.Hosting.TestKit.Tests", "src\Akka.Hosting.TestKit.Tests\Akka.Hosting.TestKit.Tests.csproj", "{3883AD08-B981-4943-8153-1E7FFD2C3127}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -105,6 +109,14 @@ Global
 		{4F79325B-9EE7-4501-800F-7A1F8DFBCC80}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4F79325B-9EE7-4501-800F-7A1F8DFBCC80}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4F79325B-9EE7-4501-800F-7A1F8DFBCC80}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E28D4F3C-6C34-497B-BDC8-F2B3EA8BA309}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E28D4F3C-6C34-497B-BDC8-F2B3EA8BA309}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E28D4F3C-6C34-497B-BDC8-F2B3EA8BA309}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E28D4F3C-6C34-497B-BDC8-F2B3EA8BA309}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3883AD08-B981-4943-8153-1E7FFD2C3127}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3883AD08-B981-4943-8153-1E7FFD2C3127}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3883AD08-B981-4943-8153-1E7FFD2C3127}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3883AD08-B981-4943-8153-1E7FFD2C3127}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

src/Akka.Hosting.TestKit.Tests/Akka.Hosting.TestKit.Tests.csproj

@@ -0,0 +1,28 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>$(TestsNetCoreFramework)</TargetFramework>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\Akka.Hosting.TestKit\Akka.Hosting.TestKit.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="1.0.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
+        <PackageReference Include="xunit" Version="$(XunitVersion)" />
+        <PackageReference Include="FluentAssertions" Version="6.7.0" />
+        <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitRunneVisualstudio)">
+            <PrivateAssets>all</PrivateAssets>
+            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
+    </ItemGroup>
+
+    <ItemGroup>
+      <None Update="xunit.runner.json">
+        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+      </None>
+    </ItemGroup>
+
+</Project>

src/Akka.Hosting.TestKit.Tests/HostingSpecSpec.cs

@@ -0,0 +1,64 @@
+// -----------------------------------------------------------------------
+//  <copyright file="HostingSpecSpec.cs" company="Akka.NET Project">
+//      Copyright (C) 2009-2022 Lightbend Inc. <http://www.lightbend.com>
+//      Copyright (C) 2013-2022 .NET Foundation <https://github.com/akkadotnet/akka.net>
+//  </copyright>
+// -----------------------------------------------------------------------
+
+using System;
+using System.Threading.Tasks;
+using Akka.Actor;
+using Akka.Event;
+using Akka.TestKit.TestActors;
+using Xunit;
+using Xunit.Abstractions;
+using LogLevel = Microsoft.Extensions.Logging.LogLevel;
+
+namespace Akka.Hosting.TestKit.Tests
+{
+    public class HostingSpecSpec: TestKit
+    {
+        private enum Echo
+        { }
+
+        public HostingSpecSpec(ITestOutputHelper output)
+            : base(nameof(HostingSpecSpec), output, logLevel: LogLevel.Debug)
+        {
+        }
+
+        protected override Task ConfigureAkka(AkkaConfigurationBuilder builder, IServiceProvider provider)
+        {
+            builder.WithActors((system, registry) =>
+            {
+                var echo = system.ActorOf(Props.Create(() => new SimpleEchoActor()));
+                registry.Register<Echo>(echo);
+            });
+            return Task.CompletedTask;
+        }
+
+        [Fact]
+        public void ActorTest()
+        {
+            var echo = ActorRegistry.Get<Echo>();
+            var probe = CreateTestProbe();
+
+            echo.Tell("TestMessage", probe);
+            var msg = probe.ExpectMsg("TestMessage");
+            Log.Info(msg);
+        }
+
+        private class SimpleEchoActor : ReceiveActor
+        {
+            public SimpleEchoActor()
+            {
+                var log = Context.GetLogger();
+
+                ReceiveAny(msg =>
+                {
+                    log.Info($"Received {msg}");
+                    Sender.Tell(msg);
+                });
+            }
+        }
+    }
+}

src/Akka.Hosting.TestKit.Tests/NoImplicitSenderSpec.cs

@@ -0,0 +1,63 @@
+//-----------------------------------------------------------------------
+// <copyright file="NoImplicitSenderSpec.cs" company="Akka.NET Project">
+//     Copyright (C) 2009-2021 Lightbend Inc. <http://www.lightbend.com>
+//     Copyright (C) 2013-2021 .NET Foundation <https://github.com/akkadotnet/akka.net>
+// </copyright>
+//-----------------------------------------------------------------------
+
+using Akka.Actor;
+using Akka.Actor.Dsl;
+using Akka.TestKit;
+using FluentAssertions;
+using Xunit;
+
+namespace Akka.Hosting.TestKit.Tests;
+
+public class NoImplicitSenderSpec : TestKit, INoImplicitSender
+{
+    [Fact]
+    public void When_Not_ImplicitSender_then_testActor_is_not_sender()
+    {
+        var echoActor = Sys.ActorOf(c => c.ReceiveAny((m, ctx) => TestActor.Tell(ctx.Sender)));
+        echoActor.Tell("message");
+        var actorRef = ExpectMsg<IActorRef>();
+        actorRef.Should().Be(Sys.DeadLetters);
+    }
+
+}
+
+public class ImplicitSenderSpec : TestKit
+{
+    [Fact]
+    public void ImplicitSender_should_have_testActor_as_sender()
+    {
+        var echoActor = Sys.ActorOf(c => c.ReceiveAny((m, ctx) => TestActor.Tell(ctx.Sender)));
+        echoActor.Tell("message");
+        ExpectMsg<IActorRef>(actorRef => Equals(actorRef, TestActor));
+
+        //Test that it works after we know that context has been changed
+        echoActor.Tell("message");
+        ExpectMsg<IActorRef>(actorRef => Equals(actorRef, TestActor));
+
+    }
+
+
+    [Fact]
+    public void ImplicitSender_should_not_change_when_creating_Testprobes()
+    {
+        //Verifies that bug #459 has been fixed
+        var testProbe = CreateTestProbe();
+        TestActor.Tell("message");
+        ReceiveOne();
+        LastSender.Should().Be(TestActor);
+    }
+
+    [Fact]
+    public void ImplicitSender_should_not_change_when_creating_TestActors()
+    {
+        var testActor2 = CreateTestActor("test2");
+        TestActor.Tell("message");
+        ReceiveOne();
+        LastSender.Should().Be(TestActor);
+    }
+}

src/Akka.Hosting.TestKit.Tests/Properties/AssemblyInfo.cs

@@ -0,0 +1,35 @@
+//-----------------------------------------------------------------------
+// <copyright file="AssemblyInfo.cs" company="Akka.NET Project">
+//     Copyright (C) 2009-2021 Lightbend Inc. <http://www.lightbend.com>
+//     Copyright (C) 2013-2021 .NET Foundation <https://github.com/akkadotnet/akka.net>
+// </copyright>
+//-----------------------------------------------------------------------
+
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+using Xunit;
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("b21496c0-a536-4953-9253-d2d0d526e42d")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+
+[assembly: CollectionBehavior(CollectionBehavior.CollectionPerAssembly, DisableTestParallelization = true)]

src/Akka.Hosting.TestKit.Tests/TestActorRefTests/BossActor.cs

@@ -0,0 +1,55 @@
+//-----------------------------------------------------------------------
+// <copyright file="BossActor.cs" company="Akka.NET Project">
+//     Copyright (C) 2009-2021 Lightbend Inc. <http://www.lightbend.com>
+//     Copyright (C) 2013-2021 .NET Foundation <https://github.com/akkadotnet/akka.net>
+// </copyright>
+//-----------------------------------------------------------------------
+
+using System;
+using Akka.Actor;
+using Akka.TestKit;
+
+namespace Akka.Hosting.TestKit.Tests.TestActorRefTests;
+
+public class BossActor : TActorBase
+{
+    private TestActorRef<InternalActor> _child;
+
+    public BossActor()
+    {
+        _child = new TestActorRef<InternalActor>(Context.System, Props.Create<InternalActor>(), Self, "child");
+    }
+
+    protected override SupervisorStrategy SupervisorStrategy()
+    {
+        return new OneForOneStrategy(maxNrOfRetries: 5, withinTimeRange: TimeSpan.FromSeconds(1), localOnlyDecider: ex => ex is ActorKilledException ? Directive.Restart : Directive.Escalate);
+    }
+
+    protected override bool ReceiveMessage(object message)
+    {
+        if(message is string && ((string)message) == "sendKill")
+        {
+            _child.Tell(Kill.Instance);
+            return true;
+        }
+        return false;
+    }
+
+    private class InternalActor : TActorBase
+    {
+        protected override void PreRestart(Exception reason, object message)
+        {
+            TestActorRefSpec.Counter--;
+        }
+
+        protected override void PostRestart(Exception reason)
+        {
+            TestActorRefSpec.Counter--;
+        }
+
+        protected override bool ReceiveMessage(object message)
+        {
+            return true;
+        }
+    }
+}

src/Akka.Hosting.TestKit.Tests/TestActorRefTests/FsmActor.cs

@@ -0,0 +1,56 @@
+//-----------------------------------------------------------------------
+// <copyright file="FsmActor.cs" company="Akka.NET Project">
+//     Copyright (C) 2009-2021 Lightbend Inc. <http://www.lightbend.com>
+//     Copyright (C) 2013-2021 .NET Foundation <https://github.com/akkadotnet/akka.net>
+// </copyright>
+//-----------------------------------------------------------------------
+
+using Akka.Actor;
+
+namespace Akka.Hosting.TestKit.Tests.TestActorRefTests;
+
+public enum TestFsmState
+{
+    First,
+    Last
+}
+
+public class FsmActor : FSM<TestFsmState, string>
+{
+    private readonly IActorRef _replyActor;
+
+    public FsmActor(IActorRef replyActor)
+    {
+        _replyActor = replyActor;
+
+        When(TestFsmState.First, e =>
+        {
+            if (e.FsmEvent.Equals("check"))
+            {
+                _replyActor.Tell("first");
+            }
+            else if (e.FsmEvent.Equals("next"))
+            {
+                return GoTo(TestFsmState.Last);
+            }
+
+            return Stay();
+        });
+
+        When(TestFsmState.Last, e =>
+        {
+            if (e.FsmEvent.Equals("check"))
+            {
+                _replyActor.Tell("last");
+            }
+            else if (e.FsmEvent.Equals("next"))
+            {
+                return GoTo(TestFsmState.First);
+            }
+
+            return Stay();
+        });
+
+        StartWith(TestFsmState.First, "foo");
+    }
+}

src/Akka.Hosting.TestKit.Tests/TestActorRefTests/Logger.cs

@@ -0,0 +1,28 @@
+//-----------------------------------------------------------------------
+// <copyright file="Logger.cs" company="Akka.NET Project">
+//     Copyright (C) 2009-2021 Lightbend Inc. <http://www.lightbend.com>
+//     Copyright (C) 2013-2021 .NET Foundation <https://github.com/akkadotnet/akka.net>
+// </copyright>
+//-----------------------------------------------------------------------
+
+using Akka.Actor;
+using Akka.Event;
+
+namespace Akka.Hosting.TestKit.Tests.TestActorRefTests;
+
+public class Logger : ActorBase
+{
+    private int _count;
+    private string _msg;
+    protected override bool Receive(object message)
+    {
+        var warning = message as Warning;
+        if(warning != null && warning.Message is string)
+        {
+            _count++;
+            _msg = (string)warning.Message;
+            return true;
+        }
+        return false;
+    }
+}