我有类似以下的Akka.Net代码,我正在尝试为它编写测试:
public class DoesSomethingActor : UntypedActor
{
protected override void OnReceive(object message)
{
}
}
public class ForwardsMessagesActor : UntypedActor
{
protected override void OnReceive(object message)
{
var actor = Context.ActorOf(Context.DI().Props<DoesSomethingActor>(), "DoesSomethingWorker");
for (int i = 0; i < 5; i++)
{
actor.Tell(message + " " + i);
}
}
}
我已经完成了这项测试,但我显然遗漏了一些东西,因为我根本没有使用太多的TestKit。是否仍然没有关于如何使用TestKit进行测试的官方文档?
//creating actor mocks with Moq seems to confuse Akka - it just doesn't work
//but creating mock classes manually like this,
//then configuring them in the DI container works
public class DoesSomethingActorSpy : DoesSomethingActor
{
public static List<object> ReceivedMessages = new List<object>();
protected override void OnReceive(object message)
{
ReceivedMessages.Add(message);
}
}
[TestMethod]
public void ForwardsMessagesActor_Creates5Messages()
{
//set up DI container to use DoesSomethingActorSpy as a child actor
ContainerBuilder builder = new ContainerBuilder();
builder.RegisterType<ForwardsMessagesActor>();
builder.RegisterType<DoesSomethingActorSpy>().As<DoesSomethingActor>();
IContainer container = builder.Build();
var propsResolver = new AutoFacDependencyResolver(container, Sys);
var actor = ActorOfAsTestActorRef<ForwardsMessagesActor>(propsResolver.Create<ForwardsMessagesActor>());
actor.Tell("Test");
//this looks wrong, I probably should be using something from TestKit
Thread.Sleep(10);
CollectionAssert.AreEquivalent(
new[] { "Test 0", "Test 1", "Test 2", "Test 3", "Test 4" },
DoesSomethingActorSpy.ReceivedMessages);
}
我应该如何创建模拟演员? TestKit上是否有任何方法可以调用等待所有消息都被处理完毕?
答案 0 :(得分:4)
引自How to Test Akka.NET Actors: Unit Testing w/ Akka.TestKit
:
测试父/子关系更复杂。在这种情况下,Akka.NET提供简单抽象的承诺使测试更加困难。
测试这种关系的最简单方法是使用消息传递。例如,您可以创建一个父actor,其子项在启动时会向另一个actor发送消息。或者您可以让父母向孩子转发消息,然后孩子可以回复原始发件人,例如:
public class ChildActor : ReceiveActor { public ChildActor() { ReceiveAny(o => Sender.Tell("hello!")); } } public class ParentActor : ReceiveActor { public ParentActor() { var child = Context.ActorOf(Props.Create(() => new ChildActor())); ReceiveAny(o => child.Forward(o)); } } [TestFixture] public class ParentGreeterSpecs : TestKit { [Test] public void Parent_should_create_child() { // verify child has been created by sending parent a message // that is forwarded to child, and which child replies to sender with var parentProps = Props.Create(() => new ParentActor()); var parent = ActorOfAsTestActorRef<ParentActor>(parentProps, TestActor); parent.Tell("this should be forwarded to the child"); ExpectMsg("hello!"); } }
关于测试父/子关系的谨慎信息
避免将代码过度耦合到层次结构中!
过度测试父/子关系可以将您的测试耦合到您的层次结构实现。这会增加以后通过强制执行许多测试重写来重构代码的成本。您需要在验证意图和测试实施之间取得平衡。