When doing TDD, I write the test spec first, creating the interface of the class under test. The new methods doesn't exist, and RubyMine notices this, underlining it with a grey line and yielding a short help command. Great! But where is the "implement missing method"-functionality, which you get in IntelliJ IDEA. I consider it an extremely powerful tool and encourages TDD (important in itself). I couldn't find information about this feature, is it planned for any release?