Rails App with Sinatra engine - How to avoid rails errors? - ruby-on-rails

Question

Problem: When running specs the output is very confusing, instead of saying where the error lies it just throws misleading errors
This is inside the rails lib folder, and it's mounted on the routes.rb
# lib/engines/users/app.rb
module Engines
module Users
class App < Sinatra::Base
get '/api/v1/users/me' do
raise 'runtime error here'
end
get '/api/v1/another-route' do
# something here
status 200
end
end
end
end
The spec file looks something like this:
it 'returns a 200' do
get '/api/v1/users/me', auth_attributes
expect(last_response.body).to eq 'something' # added to clarify my point, it's not the response status that I care of.
expect(last_response.status).to be 200
end
error:
Failure/Error: expect(last_response.status).to be 200
expected #<Fixnum:401> => 200
got #<Fixnum:1001> => 500
Compared using equal?, which compares object identity,
but expected and actual are not the same object. Use
`expect(actual).to eq(expected)` if you don't care about
object identity in this example.
expected error:
RuntimeError:
runtime error here
Another route also fails:
it 'something' do
get '/api/v1/another-route', auth_attributes
expect(last_response.status).to be 401
json = JSON.parse(last_response.body).with_indifferent_access
expect(json[:message]).to eql "You have been revoked access."
end
error: Prints a massive html output which I believe is the rails backtrace html output
expected error: none as this endpoint doesn't raise an error
My question is if there's a way to:
Stop rails from dealing with this, so it gives the actual output
Avoid the entire engine to fail because one route raise exception
I believe that by solving the first point, the second one gets fixed too.
Thank you for your time

Answer 1

In order to solve my problem I've discovered that on the spec_helper the ENV['RACK_ENV'] was not being set, setting it to test resolves the problem and throws the exception I need in order to debug my code.
This happens because https://github.com/sinatra/sinatra/blob/master/lib/sinatra/base.rb#L1832
set :show_exceptions, Proc.new { development? }
development? returned true when in fact should be false (needed the RACK_ENV set to test)
Now I get the correct output.