public void PipelineFeedsSuccessiveResultsToHandlersAndThenReturnsLast()
{
var channelMessage1 = new ChannelMessage(0, new byte[0]);
var channelMessage2 = new ChannelMessage(1, new byte[1]);
var channelMessage3 = new ChannelMessage(2, new byte[2]);
var handler1 = MockRepository.GenerateStrictMock <IChannelMessageHandler>();
handler1.Expect(h => h.Handle(channelMessage1)).Return(channelMessage2).Repeat.Once();
var handler2 = MockRepository.GenerateStrictMock <IChannelMessageHandler>();
handler2.Expect(h => h.Handle(channelMessage2)).Return(channelMessage3).Repeat.Once();
var handlers = new[]
{
handler1, handler2
};
var pipeline = new ChannelMessagePipeline(handlers);
var returnedMesage = pipeline.Handle(channelMessage1);
handler1.VerifyAllExpectations();
handler2.VerifyAllExpectations();
Assert.AreSame(channelMessage3, returnedMesage);
}
public void PipelineTerminatesWhenAHandlerReturnsNull()
{
var channelMessage = new ChannelMessage(0, new byte[0]);
var handler1 = MockRepository.GenerateStub <IChannelMessageHandler>();
handler1.Stub(h => h.Handle(channelMessage)).Return(null);
var handler2 = MockRepository.GenerateStrictMock <IChannelMessageHandler>();
handler2.Expect(h => h.Handle(channelMessage)).IgnoreArguments().Repeat.Never();
var handlers = new[]
{
handler1, handler2
};
var pipeline = new ChannelMessagePipeline(handlers);
var returnedMessage = pipeline.Handle(channelMessage);
handler2.VerifyAllExpectations();
Assert.Null(returnedMessage);
}