我正在尝试为自动机状态机编写测试,但是在正确设置它方面遇到了很多麻烦,而且我发现的文档很少。
这是我目前要进行的一项测试:
[TestFixture]
public class MyProcessStateMachineTests
{
InMemoryTestHarness _Harness;
MyProcessStateMachine _Machine;
StateMachineSagaTestHarness<MyProcess, MyProcessStateMachine> _Saga;
[OneTimeSetUp]
public void ConfigureMessages()
{
MessageCorrelation.UseCorrelationId<RequestMyDetails>(x => x.CorrelationId);
MessageCorrelation.UseCorrelationId<FileAttached>(x => x.CorrelationId);
MessageCorrelation.UseCorrelationId<PDFGenerated>(x => x.CorrelationId);
MessageCorrelation.UseCorrelationId<CustomerAttachFile>(x => x.CorrelationId);
MessageCorrelation.UseCorrelationId<AddCustomerNote>(x => x.CorrelationId);
MessageCorrelation.UseCorrelationId<EmailPublished>(x => x.CorrelationId);
}
[SetUp]
public void InitializeTestHarness()
{
_Harness = new InMemoryTestHarness();
_Machine = new MyProcessStateMachine( /* snip */ );
_Saga = _Harness.StateMachineSaga<MyProcess, MyProcessStateMachine>(_Machine);
_Harness.Start().Wait();
}
[TearDown]
public void StopTestHarness()
{
_Harness.Stop();
}
[Test]
public async Task ShouldAttachToCustomer()
{
var sagaId = Guid.NewGuid();
var custId = Guid.NewGuid();
var fileAttached = BuildFileAttachedMessage(sagaId);
await _Harness.InputQueueSendEndpoint.Send(BuildStartMessage(sagaId));
await _Harness.InputQueueSendEndpoint.Send(BuildDetailsReceivedMessage(sagaId));
await _Harness.InputQueueSendEndpoint.Send(BuildPdfGeneratedMessage(sagaId));
await _Harness.InputQueueSendEndpoint.Send(fileAttached);
// Next line is based on [the answer here][1]
// Once the above messages are all consumed and processed,
// the state machine should be in AwaitingEmail state
await _Saga.Match(x =>
x.CorrelationId == sagaId
&& x.CurrentState == _Machine.AwaitingEmail.Name,
new TimeSpan(0, 0, 30));
// Grab the instance and Assert stuff...
}
// Snip...
}
鉴于_Saga.Match调用找到了匹配项,所以我希望所有消息都已处理,并且我应该能够获取我的状态机实例和已发布的事件并检查其值-事实并非如此。当我在固定装置中运行测试时,有时我得到的实例已经消耗并发布了预期的消息。有时还不在那里。
我尝试使用以下方法获取实例:
var inst = _Saga.Sagas.FirstOrDefault(x => x.Saga.CorrelationId == sagaId);
或通过以下方式获取已发布的事件:
var test = _Harness.Published
.FirstOrDefault(x => x.MessageType == typeof(IAttachFile) && x.Context.CorrelationId == sagaId);
,但是对Match的调用成功并不重要,状态机实例(和已发布的事件)并不总是存在。
我假设来自Automatonymous,MassTransit或测试工具的异步处理导致了不一致。有帮助吗?
使用MassTransit,MassTransit.Automatonymous和MassTransit.TestFramework 5.1.2.1528,Automatonymous 4.1.1.102,进行测试
编辑:
进一步检查,我发现遇到问题时,可以致电Match( ... )
没有成功-超时。 (我一直错误地认为超时会引发异常。)
答案 0 :(得分:0)
对于遇到相同问题的任何人:您尝试获取实例的方式
var inst = _Saga.Sagas.FirstOrDefault(x => x.Saga.CorrelationId == sagaId);
可以这样固定
var instanceIds = await _sagaHarness.Match(
instance => instance.CorrelationId == sagaId
&& instance.CurrentState == _machine.Working.Name,
new TimeSpan(0, 0, 30));
在条件中包括预期状态很重要。仅仅通过correlationidid获取实例,然后测试CurrentState可能会失败,因为设置状态(异步执行传奇)可能需要一些时间。 请参见https://github.com/balintn22/AutomatonymousTestExample
的完整示例