public void StackProcessor_CallsSuccessiveProcessors()
{
var processor = new StackProcessor();
var processorCallList = new List <string>();
Action <T> AddToCallList <T>(object x) => new Action <T>(_ => processorCallList.Add(x.GetType().FullName));
var processor1 = new PassthroughHandler <DummyMessage, DummyMessage2>();
processor1.Callback = AddToCallList <DummyMessage>(processor1);
var processor2 = new PassthroughHandler <DummyMessage2, DummyMessage3>();
processor2.Callback = AddToCallList <DummyMessage2>(processor2);
var processor3 = new NoopHandler <DummyMessage3>();
processor3.Callback = AddToCallList <DummyMessage3>(processor3);
processor.RegisterHandler(processor1);
processor.RegisterHandler(processor2);
processor.RegisterHandler(processor3);
processor.AddMessage(new DummyMessage());
processor.ProcessMessages();
processorCallList.Should().ContainInOrder(
processor1.GetType().FullName,
processor2.GetType().FullName,
processor3.GetType().FullName);
}
public void StackProcessor_WhenProcessorThrows_ThrowsStackProcessorException()
{
var processor = new StackProcessor();
var expectedInnerException = new Exception("Test Exception");
processor.RegisterHandler(new NoopHandler <DummyMessage>(_ => throw expectedInnerException));
processor.AddMessage(new DummyMessage());
processor.Invoking(x => x.ProcessMessages())
.Should().ThrowExactly <StackProcessorException>()
.Where(ex => ex.InnerException == expectedInnerException);
}
public void StackProcessor_CallsProcessorWithMessage()
{
var processor = new StackProcessor();
var wasCalled = false;
var handler = new NoopHandler <DummyMessage>
{
Callback = _ => wasCalled = true
};
processor.RegisterHandler(handler);
processor.AddMessage(new DummyMessage());
processor.ProcessMessages();
wasCalled.Should().BeTrue("the message processor should have been called");
}