As someone who has tried Genetic Programming I can tell you that we're quite far from this becoming a reality. However, maybe there is something to that concept

As someone who has tried Genetic Programming I can tell you that we're quite far from this becoming a reality. However, maybe there is something to that concept: I can imagine that it's possible to generate a good part of the usual boilerplate (interfaces, function parameters, data initialization, library initializations) knowing the tests. The programmer would still have to choose the names of inner functions and variables and then do the actual implementation. You do not want to leave the implementation itself to an AI, at least not any AI we know right now. Although, maybe a Watson-like AI fed with knowledge from stack overflow and official code examples might change that in the future ;).