Dependency injection for NServiceBus handler unit testing

Question

This is how you supposed to inject dependencies for your NServiceBus handler to test it:

Test.Handler<YourMessageHandler>()
  .WithExternalDependencies(h => h.Dependency = yourObj)

(http://nservicebus.com/UnitTesting.aspx)

However it means my Dependency object reference should be public that I do not like a much. Is any way to keep it private readonly and assign it inside constructor, so that implementation supposed to be passed through the handler constructor only?

Thanks

Answer 1

You can use constructor injection by using the following syntax:

 Test.Handler<YourMessageHandler>(bus => new YourMessageHandler(dep1, dep2))

Where dep1 and dep2 are in all likelihood just some stubs or mocks that your mocking framework cooked up for you.

-- Updated by Udi Dahan from here:

You can access the mocked bus instance via Test.Bus.