public void InterceptorWithException()
{
var channel = new TaskSchedulerChannel(provider.GetService <IApplicationContext>(), TaskScheduler.Default);
var message = Message.Create("foo");
var mockHandler = new Mock <IMessageHandler>();
var expected = new InvalidOperationException("Fake exception");
var latch = new CountdownEvent(2);
mockHandler.Setup((h) => h.HandleMessage(message)).Throws(expected);
var interceptor = new BeforeHandleInterceptor(latch);
channel.AddInterceptor(interceptor);
channel.Subscribe(mockHandler.Object);
try
{
channel.Send(message);
}
catch (MessageDeliveryException actual)
{
Assert.Same(expected, actual.InnerException);
}
Assert.True(latch.Wait(3000));
Assert.Equal(1, interceptor.Counter);
Assert.True(interceptor.AfterHandledInvoked);
}
public async ValueTask InterceptorWithException()
{
var expected = new Exception("Fake exception");
var mock = new Mock <IMessageHandler>();
mock.Setup(h => h.HandleMessage(_message)).Throws(expected);
_handler = mock.Object;
var interceptor = new BeforeHandleInterceptor();
_channel.AddInterceptor(interceptor);
_channel.Subscribe(_handler);
var exceptionThrown = false;
try
{
await _channel.Writer.WriteAsync(_message);
}
catch (MessageDeliveryException actual)
{
exceptionThrown = true;
Assert.Same(expected, actual.InnerException);
}
Assert.True(exceptionThrown);
mock.Verify(h => h.HandleMessage(_message), Times.Once);
Assert.Equal(1, interceptor.Counter);
Assert.True(interceptor.WasAfterHandledInvoked);
}
public void TryWriteWithInterceptors()
{
var mock = new Mock <IMessageHandler>();
_handler = mock.Object;
var interceptor = new BeforeHandleInterceptor();
_channel.AddInterceptor(interceptor);
_channel.Subscribe(_handler);
Assert.True(_channel.Writer.TryWrite(_message));
mock.Verify(h => h.HandleMessage(_message));
Assert.Equal(1, interceptor.Counter);
Assert.True(interceptor.WasAfterHandledInvoked);
}
public async ValueTask WriteAsyncWithoutScheduler()
{
var mock = new Mock <IMessageHandler>();
_handler = mock.Object;
var interceptor = new BeforeHandleInterceptor();
_channel.AddInterceptor(interceptor);
_channel.Subscribe(_handler);
await _channel.Writer.WriteAsync(_message);
mock.Verify(h => h.HandleMessage(_message));
Assert.Equal(1, interceptor.Counter);
Assert.True(interceptor.WasAfterHandledInvoked);
}
public void SendWithScheduler()
{
var mock = new Mock <IMessageHandler>();
_handler = mock.Object;
var interceptor = new BeforeHandleInterceptor();
var scheduler = new TestScheduler();
var testChannel = new TaskSchedulerSubscribableChannel(scheduler);
testChannel.AddInterceptor(interceptor);
testChannel.Subscribe(_handler);
testChannel.Send(_message);
Assert.True(scheduler.WasTaskScheduled);
mock.Verify(h => h.HandleMessage(_message));
Assert.Equal(1, interceptor.Counter);
Assert.True(interceptor.WasAfterHandledInvoked);
}
public void InterceptorWithNull()
{
var mock = new Mock <IMessageHandler>();
_handler = mock.Object;
var interceptor1 = new BeforeHandleInterceptor();
var interceptor2 = new NullReturningBeforeHandleInterceptor();
_channel.AddInterceptor(interceptor1);
_channel.AddInterceptor(interceptor2);
_channel.Subscribe(_handler);
_channel.Send(_message);
mock.Verify(h => h.HandleMessage(_message), Times.Never);
Assert.Equal(1, interceptor1.Counter);
Assert.Equal(1, interceptor2.Counter);
Assert.True(interceptor1.WasAfterHandledInvoked);
}
public void InterceptorWithModifiedMessage()
{
var channel = new TaskSchedulerChannel(provider.GetService <IApplicationContext>(), TaskScheduler.Default);
var mockHandler = new Mock <IMessageHandler>();
var mockExpected = new Mock <IMessage>();
var latch = new CountdownEvent(2);
var interceptor = new BeforeHandleInterceptor(latch);
interceptor.MessageToReturn = mockExpected.Object;
channel.AddInterceptor(interceptor);
channel.Subscribe(mockHandler.Object);
channel.Send(Message.Create("foo"));
Assert.True(latch.Wait(10000));
mockHandler.Verify((h) => h.HandleMessage(mockExpected.Object));
Assert.Equal(1, interceptor.Counter);
Assert.True(interceptor.AfterHandledInvoked);
}
public void InterceptorWithModifiedMessage()
{
var mock = new Mock <IMessageHandler>();
_handler = mock.Object;
var mock2 = new Mock <IMessage>();
var expected = mock2.Object;
var interceptor = new BeforeHandleInterceptor();
interceptor.MessageToReturn = expected;
_channel.AddInterceptor(interceptor);
_channel.Subscribe(_handler);
_channel.Send(_message);
mock.Verify(h => h.HandleMessage(expected), Times.Once);
Assert.Equal(1, interceptor.Counter);
Assert.True(interceptor.WasAfterHandledInvoked);
}