undefined local variable or method `root_path' Hartl's Tutorial Chapter 5.3.2

Question

So my first question on Stackoverflow..... =]

My tests in Chapter 5.3.2 of Michael Hartl\'s RoR Tutorial are all failing, when the tutorial says it should be passing

Answer 1

I'll put this as an answer because the solution (from @mischa) is buried in the comments under @marflar's answer: try restarting Spork to solve this issue.