[Akka.TestKit] TestKitBase should take arbitrary ActorSystem without …

…throwing (akkadotnet#6092)

src/core/Akka.TestKit.Tests/TestKitSpec.cs

@@ -0,0 +1,59 @@
+// -----------------------------------------------------------------------
+// <copyright file="TestKitSpec.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 Akka.Actor;
+using Akka.Actor.Dsl;
+using Akka.Configuration;
+using Xunit;
+using Xunit.Abstractions;
+using FluentAssertions;
+using static FluentAssertions.FluentActions;
+
+namespace Akka.TestKit.Tests
+{
+ public class TestKitSpec
+ {
+ private readonly ITestOutputHelper _output;
+
+ public TestKitSpec(ITestOutputHelper output)
+ {
+ _output = output;
+ }
+
+ [Fact(DisplayName = "TestKit should accept arbitrary ActorSystem")]
+ public void TestKitBaseTest()
+ {
+ using (var sys = ActorSystem.Create(nameof(TestKitSpec)))
+ {
+ var testkit = new TestKit.Xunit2.TestKit(sys, _output);
+ var echoActor = testkit.Sys.ActorOf(c => c.ReceiveAny((m, ctx) => testkit.TestActor.Tell(m))); 
+ Invoking(() =>
+ {
+ echoActor.Tell("message");
+ var message = testkit.ExpectMsg<string>();
+ message.Should().Be("message");
+ }).Should().NotThrow<ConfigurationException>();
+ }
+ }
+
+ [Fact(DisplayName = "TestKit should accept ActorSystem with TestKit.DefaultConfig")]
+ public void TestKitConfigTest()
+ {
+ using (var sys = ActorSystem.Create(nameof(TestKitSpec), TestKit.Xunit2.TestKit.DefaultConfig))
+ {
+ var testkit = new TestKit.Xunit2.TestKit(sys, _output);
+ var echoActor = testkit.Sys.ActorOf(c => c.ReceiveAny((m, ctx) => testkit.TestActor.Tell(m))); 
+ Invoking(() =>
+ {
+ echoActor.Tell("message");
+ var message = testkit.ExpectMsg<string>();
+ message.Should().Be("message");
+ }).Should().NotThrow<ConfigurationException>();
+ }
+ }
+ }
+}

src/core/Akka.TestKit/TestKitBase.cs

@@ -149,6 +149,10 @@ protected void InitializeTest(ActorSystem system, ActorSystemSetup config, strin
  }
  system = ActorSystem.Create(actorSystemName ?? "test", config.WithSetup(newBootstrap));
  }
+ else
+ {
+ system.Settings.InjectTopLevelFallback(_defaultConfig);
+ }
 
  _testState.System = system;