Hello Everybody,

I am very new to TDD, not yet started using it. But i know that we have to write test first and then actual code to pass the test and refactor it till good design.

My concern over TDD is that where does it fit in our SDLC. Suppose i get a requirement of making order processing system. Now, without having any model & design of this system, how can i start writing test. Shouldn't we require to define the entities & its attribute to proceed. If not, is it possible to develop big system without any design.

I am really very confused over it. Can anyone help me to start TDD.

Thanks in advance.