... code in Listing 3.9 is pure Ruby, but even if you’ve studied Ruby before itprobably won’t look very familiar. This is because RSpec uses the general malleabilityof Ruby to define a domain-specific ... empty:def homeenddef helpendIn plain Ruby, these methods would simply do nothing. In Rails, the situation isdifferent.StaticPagesControlleris a Ruby class, but because it inherits fromApplicationController, ... a given programming problem,it’s often useful to skip the tests and write only application code, just to get a sense ofwhat the solution will look like. (In the language of Extreme Programming...