symfony/symfony@b3081e8#L32L156

That commit removed the deprecated method but the current 2.3 documentation still has this as the way to add types to a form, does anyone have an example of the new method of doing it?

http://symfony.com/doc/master/cookbook/form/unit_testing.html#adding-a-type-your-form-depends-on

I'd be happy to submit a PR for the docs if only I knew what the correct way to implement these kind of tests is now in 2.3