So first, if you are using a real SocketChannel in your unit test, it is not a unit test. You should use a mock (consider Mockito) for the SocketChannel. Doing so will allow you to provide a controlled stream of bytes to the method under test and verify what bytes are passed to the channel.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.