Testing correctness of feedforward neural network implementation

So I’m currently reading about neuroevolution (NEAT, WANN) and trying to make my own implementation just as an exercise. Now I want to test if my feedforward implementation gives the expected output. I’m doing this manually right now and it’s starting to get tedious, specially since the resulting topology is kind of crazy.

Is there some kind of dataset online which I can cross-reference? I want to do something like: given this input and topology+weights, this should be the output.