Why consider_all_requests_local fails with rspec config - ruby-on-rails-3

Question

rspec-rails (2.7.0) rails (3.0.10)
post: Rails 3.1 Error Catching is irrelevant for me.
Code:
class ApplicationController < ActionController::Base
unless Rails.application.config.consider_all_requests_local
rescue_from ActiveRecord::RecordNotFound, :with => :render_404
rescue_from Exception, :with => :render_500
rescue_from FunnyException, :with => :my_errors
def my_errors(exception)
#some stuff for production
puts "=======From top====#{Rails.application.config.consider_all_requests_local}"
end
else
rescue_from FunnyException, :with => :my_errors
def my_errors(exception)
#some stuff for development
puts "=====From bottom======#{Rails.application.config.consider_all_requests_local}"
end
end
end
This code perfectly works with production/development... problem is when I wanna test it with rspec. How to switch test case between environments?
I tried adding something like:
before do
Rails.application.config.consider_all_requests_local = true
end
I get:
...=====From bottom======true .=====From bottom======true .=====From
bottom======true .=====From bottom======true
so tried
before do
Rails.application.config.consider_all_requests_local = false
end
so I get:
...=====From bottom======false .=====From bottom======false .=====From
bottom======false .=====From bottom======false
How is that even possible? ... same with changing spec_helper
config.before(:each) do
Rails.application.config.consider_all_requests_local = false
end
unless is not working. Top section is unreachable with rspec... always hits Bottom why ? I assume it is somehow tied now with Rack... but is there any solution to dynamically change this behavior inside rspec?
regards

Answer 1

Ok I found quite easy solution
before do
Rails.application.config.consider_all_requests_local = false
load "application_controller.rb"
end
after do
Rails.application.config.consider_all_requests_local = true
load "application_controller.rb"
end
It is part of anonymous application controller test suite.
You have to add after block... because this change will persist through other suites.
Any improvements welcome :D
edit: Using spork and guard causes for me sometimes random errors... before :all seems to solve that problem

Answer 2

You also need to set Rails.application.config.action_dispatch.show_exceptions = true. But since Rails caches that value, this will only work if you run your spec on its own. Fortunately, you can change these options only for the current spec by mocking the config:
before do
method = Rails.application.method(:env_config)
expect(Rails.application).to receive(:env_config).with(no_args) do
method.call.merge(
"action_dispatch.show_exceptions" => true,
"action_dispatch.show_detailed_exceptions" => false,
"consider_all_requests_local" => false
)
end
end
Thanks to:
http://atodorov.org/blog/2016/04/27/changing-rails-consider_all_requests_local-in-rspec-fails/
https://thepugautomatic.com/2014/08/404-with-rails-4/#comment-1714338343

Answer 3

I found that with cucumber-rails the right way of doing it is to add the #allow-rescue tag.

Answer 4

The logic block is defined on class level, which gets evaluated during the class load time. This is why it will not go to 'else' even if you manually set it to false at run time.
I am also curious to know what's the best way to test this. My only clue is somehow reload or re eval ActionController, similar to reload! method in rails console.