How to I switch my sinatra server between development and testing? - testing

Question

I have a sinatra server, and according to the gemfile, there are different groups of gems. Specifically, there is an application group, a testing group, and a development group. How do I switch my application between these three groups? Specifically, I want to be running my server in testing mode so I can do TDD.
Here is the gemfile.
source 'https://rubygems.org'
ruby '2.0.0'
gem 'sinatra'
gem 'sinatra-contrib', require: %w(sinatra/config_file)
gem 'thin'
gem 'slim'
gem 'sinatra-assetpack'
gem 'zurb-foundation'
gem 'compass'
group :application do
# Here should be all the specifics for the application
end
group :test do
gem 'rspec'
gem 'coveralls'
gem 'capybara'
gem 'rubocop'
end
group :development do
gem 'rake'
gem 'guard', '2.2.3'
gem 'guard-rspec'
gem 'guard-rubocop'
gem 'guard-livereload'
gem 'guard-shotgun', git: 'git#github.com:rchampourlier/guard-shotgun.git', branch: 'master'
gem 'blam'
end

Answer 1

Gem Groups
Bundler installs by default everything. What you probably want is something like this:
$ bundle install --without test development
for your productive server, this install everything except the test & development group.
source: http://bundler.io/v1.3/groups.html
Sinatra Environment
Since you mentions sinatra explicit you maybe also interested in the sinatra config blocks
# run only in development environment
configure :development do
use Rack::Session::Pool, :key => '', :expire_after => 60 * 10
end
# run only in test environment
configure :test do
use Rack::Session::Pool, :key => 'session', :expire_after => 60 * 60
end
# run everytime
configure do
MongoMapper.database = 'food'
User.ensure_index(:username)
Product.ensure_index(:rnd)
end
You can set the different environments with RACK_ENV.
example:
RACK_ENV=test ruby mytest.rb
source: http://www.sinatrarb.com/configuration.html#built-in-settings