public void RouteShouldSendCommandWithRoutingSlipHeader() { // Arrange var mockConfiguration = new Mock<IConfiguration>(); var mockProducer = new Mock<IProducer>(); var mockContainer = new Mock<IBusContainer>(); var mockProessManagerFinder = new Mock<IProcessManagerFinder>(); mockConfiguration.Setup(x => x.GetContainer()).Returns(mockContainer.Object); mockConfiguration.Setup(x => x.GetProcessManagerFinder()).Returns(mockProessManagerFinder.Object); mockConfiguration.Setup(x => x.GetProducer()).Returns(mockProducer.Object); mockConfiguration.SetupGet(x => x.TransportSettings).Returns(new TransportSettings()); var message = new FakeMessage1(Guid.NewGuid()) { Username = "******" }; const string endPoint1 = "MyEndPoint1"; const string endPoint2 = "MyEndPoint2"; mockProducer.Setup(x => x.Send(endPoint1, It.IsAny<Type>(), It.IsAny<byte[]>(), It.IsAny<Dictionary<string, string>>())); // Act var bus = new MessageBus.Bus(mockConfiguration.Object); bus.Route(message, new List<string> { endPoint1, endPoint2 }); // Assert mockProducer.Verify(x => x.Send(endPoint1, It.IsAny<Type>(), It.IsAny<byte[]>(), It.Is<Dictionary<string, string>>(i => i.Count == 1)), Times.Once); mockProducer.Verify(x => x.Send(endPoint1, It.IsAny<Type>(), It.IsAny<byte[]>(), It.Is<Dictionary<string, string>>(i => i.ContainsKey("RoutingSlip"))), Times.Once); mockProducer.Verify(x => x.Send(endPoint1, It.IsAny<Type>(), It.IsAny<byte[]>(), It.Is<Dictionary<string, string>>(i => i.ContainsValue("[\"MyEndPoint2\"]"))), Times.Once); }