I think that your ultimate goal is to rely on Capybara for your testing as little as cleverly possible. Push all your logic into separately-unit-testable JS, pe

I think that your ultimate goal is to rely on Capybara for your testing as little as cleverly possible. Push all your logic into separately-unit-testable JS, perhaps use a DOM emulator, anything to get away from slow, barely-deterministic full browser Capybara testing.